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modify connector sample code log

This commit is contained in:
sheyanjie-qq 2024-08-14 16:25:22 +08:00
parent b9165de6b2
commit 1397fbe2a2
94 changed files with 2774 additions and 491 deletions
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6
docs/examples/csharp/nativesml/Program.cs
View File

@ -42,16 +42,16 @@ namespace TDengineExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert data with schemaless; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert data with schemaless, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert data with schemaless; Err:" + e.Message);
Console.WriteLine("Failed to insert data with schemaless, ErrMessage:" + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

6
docs/examples/csharp/stmtInsert/Program.cs
View File

@ -62,16 +62,16 @@ namespace TDengineExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert to table meters using stmt, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert to table meters using stmt, ErrMessage: " + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

24
docs/examples/csharp/subscribe/Program.cs
View File

@ -91,14 +91,14 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to create native consumer, host : " + host + "; ErrCode:" + e.Code +
"; ErrMessage: " + e.Error);
Console.WriteLine("Failed to create native consumer, host: " + host + ", ErrCode:" + e.Code +
", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to create native consumer, host : " + host + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to create native consumer, host: " + host + ", ErrMessage: " + e.Message);
throw;
}
@ -133,13 +133,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to poll data; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to poll data, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to poll data; ErrMessage:" + e.Message);
Console.WriteLine("Failed to poll data, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: subscribe
@ -163,13 +163,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Seek example failed; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to execute seek example, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Seek example failed; ErrMessage: " + e.Message);
Console.WriteLine("Failed to execute seek example, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: seek
@ -197,13 +197,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to execute consumer functions. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to execute commit example, ErrCode:" + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to execute consumer functions. ErrMessage:" + e.Message);
Console.WriteLine("Failed to execute commit example, ErrMessage: " + e.Message);
throw;
}
}
@ -221,13 +221,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to unsubscribe consumer. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to unsubscribe consumer, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to unsubscribe consumer. Err: " + e.Message);
Console.WriteLine("Failed to unsubscribe consumer, ErrMessage: " + e.Message);
throw;
}
finally
@ -239,4 +239,4 @@ namespace TMQExample
// ANCHOR_END: close
}
}
}
}

22
docs/examples/csharp/wsInsert/Program.cs
View File

@ -52,13 +52,13 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to create db and table,url:" + connectionString +"; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to create database power or stable meters, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to create db and table, url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to create database power or stable meters, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: create_db_and_table
@ -85,13 +85,13 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert data to power.meters, url:" + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert data to power.meters, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert data to power.meters, url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert data to power.meters, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: insert_data
@ -100,10 +100,10 @@ namespace Examples
private static void QueryData(ITDengineClient client,string connectionString)
{
// ANCHOR: select_data
// query data, make sure the database and table are created before
var query = "SELECT ts, current, location FROM power.meters limit 100";
try
{
// query data, make sure the database and table are created before
var query = "SELECT ts, current, location FROM power.meters limit 100";
using (var rows = client.Query(query))
{
while (rows.Read())
@ -119,13 +119,13 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to query data from power.meters, url:" + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to query data from power.meters, sql: " + query + ", ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to query data from power.meters, url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to query data from power.meters, sql: " + query + ", ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: select_data
@ -155,16 +155,16 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", url:" + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", url:" + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: query_id
}
}
}
}

6
docs/examples/csharp/wsStmt/Program.cs
View File

@ -63,16 +63,16 @@ namespace Examples
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert to table meters using stmt, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert to table meters using stmt, url: " + connectionString + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert to table meters using stmt, ErrMessage: " + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

8
docs/examples/csharp/wssml/Program.cs
View File

@ -44,17 +44,17 @@ namespace TDengineExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to insert data with schemaless, host:" + host + "; ErrCode:" + e.Code +
"; ErrMessage: " + e.Error);
Console.WriteLine("Failed to insert data with schemaless, ErrCode: " + e.Code +
", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to insert data with schemaless, ErrMessage: " + e.Message);
throw;
}
}
// ANCHOR_END: main
}
}
}

24
docs/examples/csharp/wssubscribe/Program.cs
View File

@ -96,14 +96,14 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to create websocket consumer, host : " + host + "; ErrCode:" + e.Code +
"; ErrMessage: " + e.Error);
Console.WriteLine("Failed to create websocket consumer, host: " + host + ", ErrCode: " + e.Code +
", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to create websocket consumer, host : " + host + "; ErrMessage: " + e.Message);
Console.WriteLine("Failed to create websocket consumer, host: " + host + ", ErrMessage: " + e.Message);
throw;
}
@ -138,13 +138,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to poll data; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to poll data, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to poll data; ErrMessage:" + e.Message);
Console.WriteLine("Failed to poll data, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: subscribe
@ -168,13 +168,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Seek example failed; ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to execute seek example, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Seek example failed; ErrMessage: " + e.Message);
Console.WriteLine("Failed to execute seek example, ErrMessage: " + e.Message);
throw;
}
// ANCHOR_END: seek
@ -202,13 +202,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to execute consumer functions. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to execute commit example, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to execute consumer functions. ErrMessage:" + e.Message);
Console.WriteLine("Failed to execute commit example, ErrMessage: " + e.Message);
throw;
}
}
@ -226,13 +226,13 @@ namespace TMQExample
catch (TDengineError e)
{
// handle TDengine error
Console.WriteLine("Failed to unsubscribe consumer. ErrCode:" + e.Code + "; ErrMessage: " + e.Error);
Console.WriteLine("Failed to unsubscribe consumer, ErrCode :" + e.Code + ", ErrMessage: " + e.Error);
throw;
}
catch (Exception e)
{
// handle other exceptions
Console.WriteLine("Failed to unsubscribe consumer. Err: " + e.Message);
Console.WriteLine("Failed to unsubscribe consumer, ErrMessage: " + e.Message);
throw;
}
finally
@ -244,4 +244,4 @@ namespace TMQExample
// ANCHOR_END: close
}
}
}
}

6
docs/examples/go/queryreqid/main.go
View File

@ -45,14 +45,14 @@ func main() {
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Create database error: ", err)
log.Fatal("Create database power error: ", err)
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Create table error: ", err)
log.Fatal("Create stable meters error: ", err)
}
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Insert data error: ", err)
log.Fatal("Insert data to power.meters error: ", err)
}
}

10
docs/examples/go/schemaless/native/main.go
View File

@ -20,26 +20,26 @@ func main() {
defer conn.Close()
_, err = conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
_, err = conn.Exec("USE power")
if err != nil {
log.Fatalln("Failed to use db host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to use database power, ErrMessage: " + err.Error())
}
// insert influxdb line protocol
err = conn.InfluxDBInsertLines([]string{lineDemo}, "ms")
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + lineDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb telnet protocol
err = conn.OpenTSDBInsertTelnetLines([]string{telnetDemo})
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + telnetDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb json protocol
err = conn.OpenTSDBInsertJsonPayload(jsonDemo)
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + jsonDemo + ", ErrMessage: " + err.Error())
}
fmt.Println("Inserted data with schemaless successfully.")
}

8
docs/examples/go/schemaless/ws/main.go
View File

@ -25,7 +25,7 @@ func main() {
defer db.Close()
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
s, err := schemaless.NewSchemaless(schemaless.NewConfig("ws://localhost:6041", 1,
schemaless.SetDb("power"),
@ -40,17 +40,17 @@ func main() {
// insert influxdb line protocol
err = s.Insert(lineDemo, schemaless.InfluxDBLineProtocol, "ms", 0, common.GetReqID())
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data:" + lineDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb telnet line protocol
err = s.Insert(telnetDemo, schemaless.OpenTSDBTelnetLineProtocol, "ms", 0, common.GetReqID())
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data: " + telnetDemo + ", ErrMessage: " + err.Error())
}
// insert opentsdb json format protocol
err = s.Insert(jsonDemo, schemaless.OpenTSDBJsonFormatProtocol, "s", 0, common.GetReqID())
if err != nil {
log.Fatalln("Failed to insert data with schemaless, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to insert data with schemaless, data: " + jsonDemo + ", ErrMessage: " + err.Error())
}
fmt.Println("Inserted data with schemaless successfully.")
}

21
docs/examples/go/sqlquery/main.go
View File

@ -13,29 +13,29 @@ func main() {
var taosDSN = "root:taosdata@tcp(localhost:6030)/"
db, err := sql.Open("taosSql", taosDSN)
if err != nil {
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
}
defer db.Close()
// ANCHOR: create_db_and_table
// create database
res, err := db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
rowsAffected, err := res.RowsAffected()
if err != nil {
log.Fatalln("Failed to get create db rowsAffected, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to get create database rowsAffected, ErrMessage: " + err.Error())
}
// you can check rowsAffected here
fmt.Println("Create database power successfully, rowsAffected: ", rowsAffected)
// create table
res, err = db.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create db and table, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create stable meters, ErrMessage: " + err.Error())
}
rowsAffected, err = res.RowsAffected()
if err != nil {
log.Fatalln("Failed to get create db rowsAffected, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to get create stable rowsAffected, ErrMessage: " + err.Error())
}
// you can check rowsAffected here
fmt.Println("Create stable power.meters successfully, rowsAffected:", rowsAffected)
@ -53,20 +53,21 @@ func main() {
"(NOW + 1a, 10.30000, 218, 0.25000) "
res, err = db.Exec(insertQuery)
if err != nil {
log.Fatal("Failed to insert data to power.meters, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to insert data to power.meters, ErrMessage: " + err.Error())
}
rowsAffected, err = res.RowsAffected()
if err != nil {
log.Fatal("Failed to get insert rowsAffected, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to get insert rowsAffected, ErrMessage: " + err.Error())
}
// you can check affectedRows here
fmt.Printf("Successfully inserted %d rows to power.meters.\n", rowsAffected)
// ANCHOR_END: insert_data
// ANCHOR: select_data
// query data, make sure the database and table are created before
rows, err := db.Query("SELECT ts, current, location FROM power.meters limit 100")
sql := "SELECT ts, current, location FROM power.meters limit 100"
rows, err := db.Query(sql)
if err != nil {
log.Fatal("Failed to query data from power.meters, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to query data from power.meters, ErrMessage: " + err.Error())
}
for rows.Next() {
var (
@ -76,7 +77,7 @@ func main() {
)
err = rows.Scan(&ts, &current, &location)
if err != nil {
log.Fatal("Failed to scan data, url:" + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to scan data, sql:" + sql + ", ErrMessage: " + err.Error())
}
// you can check data here
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)

16
docs/examples/go/stmt/native/main.go
View File

@ -23,22 +23,22 @@ func main() {
// prepare database and table
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
_, err = db.Exec("USE power")
if err != nil {
log.Fatalln("Failed to use db, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to use database power, ErrMessage: " + err.Error())
}
_, err = db.Exec("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create table, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create stable meters, ErrMessage: " + err.Error())
}
// prepare statement
sql := "INSERT INTO ? USING meters TAGS(?,?) VALUES (?,?,?,?)"
stmt := db.Stmt()
err = stmt.Prepare(sql)
if err != nil {
log.Fatalln("Failed to prepare sql, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to prepare sql, sql: " + sql + ", ErrMessage: " + err.Error())
}
for i := 1; i <= numOfSubTable; i++ {
tableName := fmt.Sprintf("d_bind_%d", i)
@ -46,7 +46,7 @@ func main() {
// set tableName and tags
err = stmt.SetTableNameWithTags(tableName, tags)
if err != nil {
log.Fatalln("Failed to set table name and tags, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to set table name and tags, tableName: " + tableName + "; ErrMessage: " + err.Error())
}
// bind column data
current := time.Now()
@ -58,18 +58,18 @@ func main() {
AddFloat(rand.Float32())
err = stmt.BindRow(row)
if err != nil {
log.Fatalln("Failed to bind params, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to bind params, ErrMessage: " + err.Error())
}
}
// add batch
err = stmt.AddBatch()
if err != nil {
log.Fatalln("Failed to add batch, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to add batch, ErrMessage: " + err.Error())
}
// execute batch
err = stmt.Execute()
if err != nil {
log.Fatalln("Failed to exec, host: " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to exec, ErrMessage: " + err.Error())
}
// get affected rows
affected := stmt.GetAffectedRows()

20
docs/examples/go/stmt/ws/main.go
View File

@ -27,11 +27,11 @@ func main() {
// prepare database and table
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatalln("Failed to create db, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create database power, ErrMessage: " + err.Error())
}
_, err = db.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatalln("Failed to create table, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to create stable power.meters, ErrMessage: " + err.Error())
}
config := stmt.NewConfig(fmt.Sprintf("ws://%s:6041", host), 0)
@ -49,11 +49,11 @@ func main() {
sql := "INSERT INTO ? USING meters TAGS(?,?) VALUES (?,?,?,?)"
stmt, err := connector.Init()
if err != nil {
log.Fatalln("Failed to init stmt, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to init stmt, sql: " + sql + ", ErrMessage: " + err.Error())
}
err = stmt.Prepare(sql)
if err != nil {
log.Fatal("Failed to prepare sql, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to prepare sql, sql: " + sql + ", ErrMessage: " + err.Error())
}
for i := 1; i <= numOfSubTable; i++ {
tableName := fmt.Sprintf("d_bind_%d", i)
@ -63,12 +63,12 @@ func main() {
// set tableName
err = stmt.SetTableName(tableName)
if err != nil {
log.Fatal("Failed to set table name, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to set table name, tableName: " + tableName + "; ErrMessage: " + err.Error())
}
// set tags
err = stmt.SetTags(tags, tagsType)
if err != nil {
log.Fatal("Failed to set tags, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to set tags, ErrMessage: " + err.Error())
}
// bind column data
current := time.Now()
@ -80,18 +80,18 @@ func main() {
columnData[3] = param.NewParam(1).AddFloat(rand.Float32())
err = stmt.BindParam(columnData, columnType)
if err != nil {
log.Fatal("Failed to bind params, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to bind params, ErrMessage: " + err.Error())
}
}
// add batch
err = stmt.AddBatch()
if err != nil {
log.Fatal("Failed to add batch, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to add batch, ErrMessage: " + err.Error())
}
// execute batch
err = stmt.Exec()
if err != nil {
log.Fatal("Failed to exec, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to exec, ErrMessage: " + err.Error())
}
// get affected rows
affected := stmt.GetAffectedRows()
@ -100,6 +100,6 @@ func main() {
}
err = stmt.Close()
if err != nil {
log.Fatal("Failed to close stmt, url: " + taosDSN + "; ErrMessage: " + err.Error())
log.Fatal("Failed to close stmt, ErrMessage: " + err.Error())
}
}

24
docs/examples/go/tmq/native/main.go
View File

@ -48,7 +48,7 @@ func main() {
// ANCHOR: subscribe
err = consumer.Subscribe("topic_meters", nil)
if err != nil {
log.Fatalln("Failed to subscribe, host : " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to subscribe topic_meters, ErrMessage: " + err.Error())
}
log.Println("Subscribe topics successfully")
for i := 0; i < 50; i++ {
@ -62,13 +62,13 @@ func main() {
// commit offset
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
if err != nil {
log.Fatalln("Failed to commit offset, host : " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to commit offset, ErrMessage: " + err.Error())
}
log.Println("Commit offset manually successfully.")
// ANCHOR_END: commit_offset
case tmqcommon.Error:
fmt.Printf("%% Error: %v: %v\n", e.Code(), e)
log.Fatalln("Failed to poll data, host : " + host + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to poll data, ErrMessage: " + err.Error())
}
}
}
@ -77,7 +77,7 @@ func main() {
// get assignment
partitions, err := consumer.Assignment()
if err != nil {
log.Fatal("Failed to get assignment; ErrMessage: " + err.Error())
log.Fatal("Failed to get assignment, ErrMessage: " + err.Error())
}
fmt.Println("Now assignment:", partitions)
for i := 0; i < len(partitions); i++ {
@ -88,7 +88,7 @@ func main() {
Offset: 0,
}, 0)
if err != nil {
log.Fatalln("Seek example failed; ErrMessage: " + err.Error())
log.Fatalln("Failed to execute seek example, ErrMessage: " + err.Error())
}
}
fmt.Println("Assignment seek to beginning successfully")
@ -97,13 +97,15 @@ func main() {
// unsubscribe
err = consumer.Unsubscribe()
if err != nil {
log.Fatal("Failed to unsubscribe consumer. ErrMessage: " + err.Error())
log.Fatal("Failed to unsubscribe consumer, ErrMessage: " + err.Error())
}
fmt.Println("Consumer unsubscribed successfully.")
// close consumer
err = consumer.Close()
if err != nil {
log.Fatal("Failed to close consumer. ErrMessage: " + err.Error())
log.Fatal("Failed to close consumer, ErrMessage: " + err.Error())
}
fmt.Println("Consumer closed successfully.")
// ANCHOR_END: close
<-done
}
@ -111,22 +113,22 @@ func main() {
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Failed to create database. ErrMessage: " + err.Error())
log.Fatal("Failed to create database, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Failed to create stable. ErrMessage: " + err.Error())
log.Fatal("Failed to create stable, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM power.meters")
if err != nil {
log.Fatal("Failed to create topic. ErrMessage: " + err.Error())
log.Fatal("Failed to create topic, ErrMessage: " + err.Error())
}
go func() {
for i := 0; i < 10; i++ {
time.Sleep(time.Second)
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Failed to insert data. ErrMessage: " + err.Error())
log.Fatal("Failed to insert data, ErrMessage: " + err.Error())
}
}
done <- struct{}{}

24
docs/examples/go/tmq/ws/main.go
View File

@ -53,7 +53,7 @@ func main() {
// ANCHOR: subscribe
err = consumer.Subscribe("topic_meters", nil)
if err != nil {
log.Fatalln("Failed to subscribe, host : " + wsUrl + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to subscribe topic_meters, ErrMessage: " + err.Error())
}
log.Println("Subscribe topics successfully")
for i := 0; i < 50; i++ {
@ -67,13 +67,13 @@ func main() {
// commit offset
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
if err != nil {
log.Fatalln("Failed to commit offset, host : " + wsUrl + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to commit offset, ErrMessage: " + err.Error())
}
log.Println("Commit offset manually successfully.")
// ANCHOR_END: commit_offset
case tmqcommon.Error:
fmt.Printf("%% Error: %v: %v\n", e.Code(), e)
log.Fatalln("Failed to poll data, host : " + wsUrl + "; ErrMessage: " + err.Error())
log.Fatalln("Failed to poll data, ErrMessage: " + err.Error())
}
}
}
@ -82,7 +82,7 @@ func main() {
// get assignment
partitions, err := consumer.Assignment()
if err != nil {
log.Fatal("Failed to get assignment; ErrMessage: " + err.Error())
log.Fatal("Failed to get assignment, ErrMessage: " + err.Error())
}
fmt.Println("Now assignment:", partitions)
for i := 0; i < len(partitions); i++ {
@ -93,7 +93,7 @@ func main() {
Offset: 0,
}, 0)
if err != nil {
log.Fatalln("Seek example failed; ErrMessage: " + err.Error())
log.Fatalln("Failed to execute seek example, ErrMessage: " + err.Error())
}
}
fmt.Println("Assignment seek to beginning successfully")
@ -102,13 +102,15 @@ func main() {
// unsubscribe
err = consumer.Unsubscribe()
if err != nil {
log.Fatal("Failed to unsubscribe consumer. ErrMessage: " + err.Error())
log.Fatal("Failed to unsubscribe consumer, ErrMessage: " + err.Error())
}
fmt.Println("Consumer unsubscribed successfully.")
// close consumer
err = consumer.Close()
if err != nil {
log.Fatal("Failed to close consumer. ErrMessage: " + err.Error())
log.Fatal("Failed to close consumer, ErrMessage: " + err.Error())
}
fmt.Println("Consumer closed successfully.")
// ANCHOR_END: close
<-done
}
@ -116,22 +118,22 @@ func main() {
func initEnv(conn *sql.DB) {
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
log.Fatal("Failed to create database. ErrMessage: " + err.Error())
log.Fatal("Failed to create database, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
log.Fatal("Failed to create stable. ErrMessage: " + err.Error())
log.Fatal("Failed to create stable, ErrMessage: " + err.Error())
}
_, err = conn.Exec("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM power.meters")
if err != nil {
log.Fatal("Failed to create topic. ErrMessage: " + err.Error())
log.Fatal("Failed to create topic, ErrMessage: " + err.Error())
}
go func() {
for i := 0; i < 10; i++ {
time.Sleep(time.Second)
_, err = conn.Exec("INSERT INTO power.d1001 USING power.meters TAGS (2, 'California.SanFrancisco') VALUES (NOW , 10.2, 219, 0.32)")
if err != nil {
log.Fatal("Failed to insert data. ErrMessage: " + err.Error())
log.Fatal("Failed to insert data, ErrMessage: " + err.Error())
}
}
done <- struct{}{}

18
docs/examples/java/pom.xml
View File

@ -25,6 +25,24 @@
<version>3.3.0</version>
</dependency>
<!-- ANCHOR_END: dep-->
<!-- druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.17</version>
</dependency>
<!-- HikariCP -->
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>org.locationtech.jts</groupId>
<artifactId>jts-core</artifactId>
<version>1.19.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>

384
docs/examples/java/src/main/java/com/taos/example/ConsumerLoopFull.java Normal file
View File

@ -0,0 +1,384 @@
package com.taos.example;
import com.alibaba.fastjson.JSON;
import com.taosdata.jdbc.TSDBDriver;
import com.taosdata.jdbc.tmq.*;
import java.sql.*;
import java.time.Duration;
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
// ANCHOR: consumer_demo
public class ConsumerLoopFull {
static private Connection connection;
static private Statement statement;
static private volatile boolean stopThread = false;
public static TaosConsumer<ResultBean> getConsumer() throws Exception {
// ANCHOR: create_consumer
Properties config = new Properties();
config.setProperty("td.connect.type", "jni");
config.setProperty("bootstrap.servers", "localhost:6030");
config.setProperty("auto.offset.reset", "latest");
config.setProperty("msg.with.table.name", "true");
config.setProperty("enable.auto.commit", "true");
config.setProperty("auto.commit.interval.ms", "1000");
config.setProperty("group.id", "group1");
config.setProperty("client.id", "1");
config.setProperty("td.connect.user", "root");
config.setProperty("td.connect.pass", "taosdata");
config.setProperty("value.deserializer", "com.taos.example.ConsumerLoopFull$ResultDeserializer");
config.setProperty("value.deserializer.encoding", "UTF-8");
try {
TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"));
return consumer;
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create native consumer, host: %s, %sErrMessage: %s%n",
config.getProperty("bootstrap.servers"),
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_consumer
}
public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: poll_data_code_piece
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
for (int i = 0; i < 50; i++) {
// poll data
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process the data here
System.out.println("data: " + JSON.toJSONString(bean));
}
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to poll data, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: poll_data_code_piece
}
public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: consumer_seek
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
Set<TopicPartition> assignment = consumer.assignment();
System.out.println("Now assignment: " + JSON.toJSONString(assignment));
ConsumerRecords<ResultBean> records = ConsumerRecords.emptyRecord();
// make sure we have got some data
while (records.isEmpty()) {
records = consumer.poll(Duration.ofMillis(100));
}
consumer.seekToBeginning(assignment);
System.out.println("Assignment seek to beginning successfully.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute seek example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: consumer_seek
}
public static void commitExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: commit_code_piece
try {
List<String> topics = Collections.singletonList("topic_meters");
consumer.subscribe(topics);
for (int i = 0; i < 50; i++) {
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process your data here
System.out.println("data: " + JSON.toJSONString(bean));
}
if (!records.isEmpty()) {
// after processing the data, commit the offset manually
consumer.commitSync();
System.out.println("Commit offset manually successfully.");
}
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute commit example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: commit_code_piece
}
public static void unsubscribeExample(TaosConsumer<ResultBean> consumer) throws SQLException {
List<String> topics = Collections.singletonList("topic_meters");
consumer.subscribe(topics);
// ANCHOR: unsubscribe_data_code_piece
try {
// unsubscribe the consumer
consumer.unsubscribe();
System.out.println("Consumer unsubscribed successfully.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to unsubscribe consumer, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
finally {
// close the consumer
consumer.close();
System.out.println("Consumer closed successfully.");
}
// ANCHOR_END: unsubscribe_data_code_piece
}
public static class ResultDeserializer extends ReferenceDeserializer<ResultBean> {
}
// use this class to define the data structure of the result record
public static class ResultBean {
private Timestamp ts;
private double current;
private int voltage;
private double phase;
private int groupid;
private String location;
public Timestamp getTs() {
return ts;
}
public void setTs(Timestamp ts) {
this.ts = ts;
}
public double getCurrent() {
return current;
}
public void setCurrent(double current) {
this.current = current;
}
public int getVoltage() {
return voltage;
}
public void setVoltage(int voltage) {
this.voltage = voltage;
}
public double getPhase() {
return phase;
}
public void setPhase(double phase) {
this.phase = phase;
}
public int getGroupid() {
return groupid;
}
public void setGroupid(int groupid) {
this.groupid = groupid;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
}
public static void prepareData() throws SQLException, InterruptedException {
try {
int i = 0;
while (!stopThread) {
String insertQuery = "INSERT INTO power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') VALUES (NOW + " + i + "a, 10.30000, 219, 0.31000) ";
int affectedRows = statement.executeUpdate(insertQuery);
assert affectedRows == 1;
i++;
Thread.sleep(1);
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
public static void prepareMeta() throws SQLException {
try {
statement.executeUpdate("CREATE DATABASE IF NOT EXISTS power");
statement.executeUpdate("USE power");
statement.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
statement.executeUpdate("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create db and table, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
public static void initConnection() throws SQLException {
String url = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
Properties properties = new Properties();
properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "C");
properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
try {
connection = DriverManager.getConnection(url, properties);
} catch (SQLException ex) {
System.out.println("Failed to create connection, url:" + url + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create connection", ex);
}
try {
statement = connection.createStatement();
} catch (SQLException ex) {
System.out.println("Failed to create statement, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create statement", ex);
}
System.out.println("Connection created successfully.");
}
public static void closeConnection() throws SQLException {
try {
if (statement != null) {
statement.close();
}
} catch (SQLException ex) {
System.out.println("Failed to close statement, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to close statement", ex);
}
try {
if (connection != null) {
connection.close();
}
} catch (SQLException ex) {
System.out.println("Failed to close connection, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to close connection", ex);
}
System.out.println("Connection closed Successfully.");
}
public static void main(String[] args) throws SQLException, InterruptedException {
initConnection();
prepareMeta();
// create a single thread executor
ExecutorService executor = Executors.newSingleThreadExecutor();
// submit a task
executor.submit(() -> {
try {
prepareData();
} catch (SQLException ex) {
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + ", ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to prepare data, ErrMessage: " + ex.getMessage());
return;
}
System.out.println("pollDataExample executed successfully.");
});
try {
TaosConsumer<ResultBean> consumer = getConsumer();
pollExample(consumer);
System.out.println("pollExample executed successfully.");
consumer.unsubscribe();
seekExample(consumer);
System.out.println("seekExample executed successfully.");
consumer.unsubscribe();
commitExample(consumer);
System.out.println("commitExample executed successfully.");
consumer.unsubscribe();
unsubscribeExample(consumer);
System.out.println("unsubscribeExample executed successfully");
} catch (SQLException ex) {
System.out.println("Failed to poll data from topic_meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to poll data from topic_meters, ErrMessage: " + ex.getMessage());
return;
}
stopThread = true;
// close the executor, which will make the executor reject new tasks
executor.shutdown();
try {
// wait for the executor to terminate
boolean result = executor.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
assert result;
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} catch (Exception e) {
e.printStackTrace();
System.out.println("Wait executor termination failed.");
}
closeConnection();
System.out.println("program end.");
}
}
// ANCHOR_END: consumer_demo

36
docs/examples/java/src/main/java/com/taos/example/DruidDemo.java Normal file
View File

@ -0,0 +1,36 @@
package com.taosdata.example;
import com.alibaba.druid.pool.DruidDataSource;
import java.sql.Connection;
import java.sql.Statement;
public class DruidDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
String url = "jdbc:TAOS://127.0.0.1:6030/log";
DruidDataSource dataSource = new DruidDataSource();
// jdbc properties
dataSource.setDriverClassName("com.taosdata.jdbc.TSDBDriver");
dataSource.setUrl(url);
dataSource.setUsername("root");
dataSource.setPassword("taosdata");
// pool configurations
dataSource.setInitialSize(10);
dataSource.setMinIdle(10);
dataSource.setMaxActive(10);
dataSource.setMaxWait(30000);
dataSource.setValidationQuery("SELECT SERVER_VERSION()");
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}

190
docs/examples/java/src/main/java/com/taos/example/GeometryDemo.java Normal file
View File

@ -0,0 +1,190 @@
package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
import org.locationtech.jts.geom.*;
import org.locationtech.jts.io.ByteOrderValues;
import org.locationtech.jts.io.ParseException;
import org.locationtech.jts.io.WKBReader;
import org.locationtech.jts.io.WKBWriter;
import java.sql.*;
import java.util.ArrayList;
import java.util.Properties;
public class GeometryDemo {
private static String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
private Connection connection;
public static void main(String[] args) throws SQLException {
for (int i = 0; i < args.length; i++) {
if ("-host".equalsIgnoreCase(args[i]) && i < args.length - 1)
host = args[++i];
}
if (host == null) {
printHelp();
}
GeometryDemo demo = new GeometryDemo();
demo.init();
demo.createDatabase();
demo.useDatabase();
demo.dropTable();
demo.createTable();
demo.insert();
demo.stmtInsert();
demo.select();
demo.dropTable();
demo.close();
}
private void init() {
final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
try {
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
connection = DriverManager.getConnection(url, properties);
if (connection != null)
System.out.println("[ OK ] Connection established.");
} catch (SQLException e) {
e.printStackTrace();
}
}
private void createDatabase() {
String sql = "create database if not exists " + dbName;
execute(sql);
}
private void useDatabase() {
String sql = "use " + dbName;
execute(sql);
}
private void dropTable() {
final String sql = "drop table if exists " + dbName + "." + tbName + "";
execute(sql);
}
private void createTable() {
final String sql = "create table if not exists " + dbName + "." + tbName + " (ts timestamp, temperature float, humidity int, location geometry(50))";
execute(sql);
}
private void insert() {
final String sql = "insert into " + dbName + "." + tbName + " (ts, temperature, humidity, location) values(now, 20.5, 34, 'POINT(1 2)')";
execute(sql);
}
private void stmtInsert() throws SQLException {
TSDBPreparedStatement preparedStatement = (TSDBPreparedStatement) connection.prepareStatement("insert into " + dbName + "." + tbName + " values (?, ?, ?, ?)");
long current = System.currentTimeMillis();
ArrayList<Long> tsList = new ArrayList<>();
tsList.add(current);
tsList.add(current + 1);
preparedStatement.setTimestamp(0, tsList);
ArrayList<Float> tempList = new ArrayList<>();
tempList.add(20.1F);
tempList.add(21.2F);
preparedStatement.setFloat(1, tempList);
ArrayList<Integer> humList = new ArrayList<>();
humList.add(30);
humList.add(31);
preparedStatement.setInt(2, humList);
ArrayList<byte[]> list = new ArrayList<>();
GeometryFactory gf = new GeometryFactory();
Point p1 = gf.createPoint(new Coordinate(1,2));
p1.setSRID(1234);
// NOTE: TDengine current version only support 2D dimension and little endian byte order
WKBWriter w = new WKBWriter(2, ByteOrderValues.LITTLE_ENDIAN, true);
byte[] wkb = w.write(p1);
list.add(wkb);
Coordinate[] coordinates = { new Coordinate(10, 20),
new Coordinate(30, 40)};
LineString lineString = gf.createLineString(coordinates);
lineString.setSRID(2345);
byte[] wkb2 = w.write(lineString);
list.add(wkb2);
preparedStatement.setGeometry(3, list, 50);
preparedStatement.columnDataAddBatch();
preparedStatement.columnDataExecuteBatch();
}
private void select() {
final String sql = "select * from " + dbName + "." + tbName;
executeQuery(sql);
}
private void close() {
try {
if (connection != null) {
this.connection.close();
System.out.println("connection closed.");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
private void executeQuery(String sql) {
long start = System.currentTimeMillis();
try (Statement statement = connection.createStatement()) {
ResultSet resultSet = statement.executeQuery(sql);
long end = System.currentTimeMillis();
printSql(sql, true, (end - start));
while (resultSet.next()){
byte[] result1 = resultSet.getBytes(4);
WKBReader reader = new WKBReader();
Geometry g1 = reader.read(result1);
System.out.println("GEO OBJ: " + g1 + ", SRID: " + g1.getSRID());
}
} catch (SQLException e) {
long end = System.currentTimeMillis();
printSql(sql, false, (end - start));
e.printStackTrace();
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
private void printSql(String sql, boolean succeed, long cost) {
System.out.println("[ " + (succeed ? "OK" : "ERROR!") + " ] time cost: " + cost + " ms, execute statement ====> " + sql);
}
private void execute(String sql) {
long start = System.currentTimeMillis();
try (Statement statement = connection.createStatement()) {
boolean execute = statement.execute(sql);
long end = System.currentTimeMillis();
printSql(sql, true, (end - start));
} catch (SQLException e) {
long end = System.currentTimeMillis();
printSql(sql, false, (end - start));
e.printStackTrace();
}
}
private static void printHelp() {
System.out.println("Usage: java -jar JDBCDemo.jar -host <hostname>");
System.exit(0);
}
}

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package com.taosdata.example;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import java.sql.Connection;
import java.sql.Statement;
public class HikariDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
HikariConfig config = new HikariConfig();
// jdbc properties
config.setJdbcUrl("jdbc:TAOS://127.0.0.1:6030/log");
config.setUsername("root");
config.setPassword("taosdata");
// connection pool configurations
config.setMinimumIdle(10); // minimum number of idle connection
config.setMaximumPoolSize(10); // maximum number of connection in the pool
config.setConnectionTimeout(30000); // maximum wait milliseconds for get connection from pool
config.setMaxLifetime(0); // maximum life time for each connection
config.setIdleTimeout(0); // max idle time for recycle idle connection
config.setConnectionTestQuery("SELECT SERVER_VERSION()"); // validation query
HikariDataSource dataSource = new HikariDataSource(config); // create datasource
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}

48
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@ -8,31 +8,33 @@ import java.util.Properties;
import com.taosdata.jdbc.TSDBDriver;
public class JNIConnectExample {
// ANCHOR: main
public static void main(String[] args) throws SQLException {
// use
// String jdbcUrl = "jdbc:TAOS://localhost:6030/dbName?user=root&password=taosdata";
// if you want to connect a specified database named "dbName".
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
Properties connProps = new Properties();
connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
// ANCHOR: main
public static void main(String[] args) throws Exception {
// use
// String jdbcUrl =
// "jdbc:TAOS://localhost:6030/dbName?user=root&password=taosdata";
// if you want to connect a specified database named "dbName".
String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
Properties connProps = new Properties();
connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)) {
System.out.println("Connected to " + jdbcUrl + " successfully.");
try (Connection conn = DriverManager.getConnection(jdbcUrl, connProps)) {
System.out.println("Connected to " + jdbcUrl + " successfully.");
// you can use the connection for execute SQL here
// you can use the connection for execute SQL here
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to connect to " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to connect to " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to connect to %s, %sErrMessage: %s%n",
jdbcUrl,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
// ANCHOR_END: main
}
// ANCHOR_END: main
}

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package com.taos.example;
import com.taosdata.jdbc.AbstractStatement;
import java.sql.*;
import java.util.Properties;
public class JdbcBasicDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String url = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
try (Connection connection = DriverManager.getConnection(url, properties)) {
if (connection != null) {
System.out.println("[ OK ] Connection established.");
} else {
System.out.println("[ ERR ] Connection can not be established.");
return;
}
Statement stmt = connection.createStatement();
// ANCHOR: create_db_and_table
// create database
stmt.executeUpdate("CREATE DATABASE IF NOT EXISTS power");
// use database
stmt.executeUpdate("USE power");
// create table
stmt.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
// ANCHOR_END: create_db_and_table
// ANCHOR: insert_data
// insert data
String insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
int affectedRows = stmt.executeUpdate(insertQuery);
System.out.println("insert " + affectedRows + " rows.");
// ANCHOR_END: insert_data
// ANCHOR: query_data
// query data
ResultSet resultSet = stmt.executeQuery("SELECT * FROM meters");
Timestamp ts;
float current;
String location;
while (resultSet.next()) {
ts = resultSet.getTimestamp(1);
current = resultSet.getFloat(2);
location = resultSet.getString("location");
System.out.printf("%s, %f, %s\n", ts, current, location);
}
// ANCHOR_END: query_data
// ANCHOR: with_reqid
AbstractStatement aStmt = (AbstractStatement) connection.createStatement();
aStmt.execute("CREATE DATABASE IF NOT EXISTS power", 1L);
aStmt.executeUpdate("USE power", 2L);
try (ResultSet rs = aStmt.executeQuery("SELECT * FROM meters limit 1", 3L)) {
while (rs.next()) {
Timestamp timestamp = rs.getTimestamp(1);
System.out.println("timestamp = " + timestamp);
}
}
aStmt.close();
// ANCHOR_END: with_reqid
String sql = "SELECT * FROM meters limit 2;";
// ANCHOR: jdbc_exception
try (Statement statement = connection.createStatement();
// executeQuery
ResultSet tempResultSet = statement.executeQuery(sql)) {
// print result
printResult(tempResultSet);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute statement, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: jdbc_exception
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Error Code: " + ex.getErrorCode());
System.out.println("Message: " + ex.getMessage());
}
}
private static void printResult(ResultSet resultSet) throws SQLException {
Util.printResult(resultSet);
}
}

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package com.taos.example;
import java.sql.*;
import java.util.Properties;
public class JdbcCreatDBDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: create_db_and_table
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement()) {
// create database
int rowsAffected = stmt.executeUpdate("CREATE DATABASE IF NOT EXISTS power");
// you can check rowsAffected here
System.out.println("Create database power successfully, rowsAffected: " + rowsAffected);
// create table
rowsAffected = stmt.executeUpdate("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
// you can check rowsAffected here
System.out.println("Create stable power.meters successfully, rowsAffected: " + rowsAffected);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create database power or stable meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_db_and_table
}
private static void printResult(ResultSet resultSet) throws SQLException {
Util.printResult(resultSet);
}
}

55
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@ -0,0 +1,55 @@
package com.taos.example;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class JdbcInsertDataDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: insert_data
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement()) {
// insert data, please make sure the database and table are created before
String insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
int affectedRows = stmt.executeUpdate(insertQuery);
// you can check affectedRows here
System.out.println("Successfully inserted " + affectedRows + " rows to power.meters.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: insert_data
}
}

55
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package com.taos.example;
import java.sql.*;
import java.util.Properties;
public class JdbcQueryDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: query_data
String sql = "SELECT ts, current, location FROM power.meters limit 100";
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement();
// query data, make sure the database and table are created before
ResultSet resultSet = stmt.executeQuery(sql)) {
Timestamp ts;
float current;
String location;
while (resultSet.next()) {
ts = resultSet.getTimestamp(1);
current = resultSet.getFloat(2);
// we recommend using the column name to get the value
location = resultSet.getString("location");
// you can check data here
System.out.printf("ts: %s, current: %f, location: %s %n", ts, current, location);
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to query data from power.meters, sql: %s, %sErrMessage: %s%n",
sql,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: query_data
}
}

64
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@ -0,0 +1,64 @@
package com.taos.example;
import com.taosdata.jdbc.AbstractStatement;
import java.sql.*;
import java.util.Properties;
public class JdbcReqIdDemo {
private static final String host = "localhost";
private static final String dbName = "test";
private static final String tbName = "weather";
private static final String user = "root";
private static final String password = "taosdata";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=" + user + "&password=" + password;
// get connection
Properties properties = new Properties();
properties.setProperty("charset", "UTF-8");
properties.setProperty("locale", "en_US.UTF-8");
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: with_reqid
long reqId = 3L;
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
// Create a statement that allows specifying a request ID
AbstractStatement aStmt = (AbstractStatement) connection.createStatement()) {
try (ResultSet resultSet = aStmt.executeQuery("SELECT ts, current, location FROM power.meters limit 1", reqId)) {
Timestamp ts;
float current;
String location;
while (resultSet.next()) {
ts = resultSet.getTimestamp(1);
current = resultSet.getFloat(2);
// we recommend using the column name to get the value
location = resultSet.getString("location");
// you can check data here
System.out.printf("ts: %s, current: %f, location: %s %n", ts, current, location);
}
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute sql with reqId: %s, %sErrMessage: %s%n", reqId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: with_reqid
}
private static void printResult(ResultSet resultSet) throws SQLException {
Util.printResult(resultSet);
}
}

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package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Random;
// ANCHOR: para_bind
public class ParameterBindingBasicDemo {
// modify host to your own
private static final String host = "127.0.0.1";
private static final Random random = new Random(System.currentTimeMillis());
private static final int numOfSubTable = 10, numOfRow = 10;
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS://" + host + ":6030/";
try (Connection conn = DriverManager.getConnection(jdbcUrl, "root", "taosdata")) {
init(conn);
String sql = "INSERT INTO ? USING power.meters TAGS(?,?) VALUES (?,?,?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("d_bind_" + i);
// set tags
pstmt.setTagInt(0, i);
pstmt.setTagString(1, "location_" + i);
// set column ts
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
// set column current
ArrayList<Float> currentList = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
currentList.add(random.nextFloat() * 30);
pstmt.setFloat(1, currentList);
// set column voltage
ArrayList<Integer> voltageList = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
voltageList.add(random.nextInt(300));
pstmt.setInt(2, voltageList);
// set column phase
ArrayList<Float> phaseList = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
phaseList.add(random.nextFloat());
pstmt.setFloat(3, phaseList);
// add column
pstmt.columnDataAddBatch();
}
// execute column
pstmt.columnDataExecuteBatch();
// you can check exeResult here
System.out.println("Successfully inserted " + (numOfSubTable * numOfRow) + " rows to power.meters.");
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert to table meters using stmt, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
private static void init(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("CREATE DATABASE IF NOT EXISTS power");
stmt.execute("USE power");
stmt.execute("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
}
}
}
// ANCHOR_END: para_bind

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package com.taos.example;
import com.taosdata.jdbc.TSDBPreparedStatement;
import com.taosdata.jdbc.utils.StringUtils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
// ANCHOR: para_bind
public class ParameterBindingFullDemo {
private static final String host = "127.0.0.1";
private static final Random random = new Random(System.currentTimeMillis());
private static final int BINARY_COLUMN_SIZE = 50;
private static final String[] schemaList = {
"create table stable1(ts timestamp, f1 tinyint, f2 smallint, f3 int, f4 bigint) tags(t1 tinyint, t2 smallint, t3 int, t4 bigint)",
"create table stable2(ts timestamp, f1 float, f2 double) tags(t1 float, t2 double)",
"create table stable3(ts timestamp, f1 bool) tags(t1 bool)",
"create table stable4(ts timestamp, f1 binary(" + BINARY_COLUMN_SIZE + ")) tags(t1 binary(" + BINARY_COLUMN_SIZE + "))",
"create table stable5(ts timestamp, f1 nchar(" + BINARY_COLUMN_SIZE + ")) tags(t1 nchar(" + BINARY_COLUMN_SIZE + "))",
"create table stable6(ts timestamp, f1 varbinary(" + BINARY_COLUMN_SIZE + ")) tags(t1 varbinary(" + BINARY_COLUMN_SIZE + "))",
"create table stable7(ts timestamp, f1 geometry(" + BINARY_COLUMN_SIZE + ")) tags(t1 geometry(" + BINARY_COLUMN_SIZE + "))",
};
private static final int numOfSubTable = 10, numOfRow = 10;
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS://" + host + ":6030/";
try (Connection conn = DriverManager.getConnection(jdbcUrl, "root", "taosdata")) {
init(conn);
bindInteger(conn);
bindFloat(conn);
bindBoolean(conn);
bindBytes(conn);
bindString(conn);
bindVarbinary(conn);
bindGeometry(conn);
clean(conn);
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
}
}
private static void init(Connection conn) throws SQLException {
clean(conn);
try (Statement stmt = conn.createStatement()) {
stmt.execute("create database if not exists test_parabind");
stmt.execute("use test_parabind");
for (int i = 0; i < schemaList.length; i++) {
stmt.execute(schemaList[i]);
}
}
}
private static void clean(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("drop database if exists test_parabind");
}
}
private static void bindInteger(Connection conn) throws SQLException {
String sql = "insert into ? using stable1 tags(?,?,?,?) values(?,?,?,?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t1_" + i);
// set tags
pstmt.setTagByte(0, Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setTagShort(1, Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setTagInt(2, random.nextInt(Integer.MAX_VALUE));
pstmt.setTagLong(3, random.nextLong());
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<Byte> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f1List.add(Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setByte(1, f1List);
ArrayList<Short> f2List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f2List.add(Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setShort(2, f2List);
ArrayList<Integer> f3List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f3List.add(random.nextInt(Integer.MAX_VALUE));
pstmt.setInt(3, f3List);
ArrayList<Long> f4List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f4List.add(random.nextLong());
pstmt.setLong(4, f4List);
// add column
pstmt.columnDataAddBatch();
}
// execute column
pstmt.columnDataExecuteBatch();
}
}
private static void bindFloat(Connection conn) throws SQLException {
String sql = "insert into ? using stable2 tags(?,?) values(?,?,?)";
TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class);
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t2_" + i);
// set tags
pstmt.setTagFloat(0, random.nextFloat());
pstmt.setTagDouble(1, random.nextDouble());
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<Float> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f1List.add(random.nextFloat());
pstmt.setFloat(1, f1List);
ArrayList<Double> f2List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f2List.add(random.nextDouble());
pstmt.setDouble(2, f2List);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
// close if no try-with-catch statement is used
pstmt.close();
}
private static void bindBoolean(Connection conn) throws SQLException {
String sql = "insert into ? using stable3 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t3_" + i);
// set tags
pstmt.setTagBoolean(0, random.nextBoolean());
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<Boolean> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++)
f1List.add(random.nextBoolean());
pstmt.setBoolean(1, f1List);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindBytes(Connection conn) throws SQLException {
String sql = "insert into ? using stable4 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t4_" + i);
// set tags
pstmt.setTagString(0, new String("abc"));
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<String> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
f1List.add(new String("abc"));
}
pstmt.setString(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindString(Connection conn) throws SQLException {
String sql = "insert into ? using stable5 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t5_" + i);
// set tags
pstmt.setTagNString(0, "California.SanFrancisco");
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<String> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
f1List.add("California.LosAngeles");
}
pstmt.setNString(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindVarbinary(Connection conn) throws SQLException {
String sql = "insert into ? using stable6 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t6_" + i);
// set tags
byte[] bTag = new byte[]{0,2,3,4,5};
bTag[0] = (byte) i;
pstmt.setTagVarbinary(0, bTag);
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<byte[]> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
byte[] v = new byte[]{0,2,3,4,5,6};
v[0] = (byte)j;
f1List.add(v);
}
pstmt.setVarbinary(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
private static void bindGeometry(Connection conn) throws SQLException {
String sql = "insert into ? using stable7 tags(?) values(?,?)";
try (TSDBPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSDBPreparedStatement.class)) {
byte[] g1 = StringUtils.hexToBytes("0101000000000000000000F03F0000000000000040");
byte[] g2 = StringUtils.hexToBytes("0102000020E610000002000000000000000000F03F000000000000004000000000000008400000000000001040");
List<byte[]> listGeo = new ArrayList<>();
listGeo.add(g1);
listGeo.add(g2);
for (int i = 1; i <= 2; i++) {
// set table name
pstmt.setTableName("t7_" + i);
// set tags
pstmt.setTagGeometry(0, listGeo.get(i - 1));
// set columns
ArrayList<Long> tsList = new ArrayList<>();
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++)
tsList.add(current + j);
pstmt.setTimestamp(0, tsList);
ArrayList<byte[]> f1List = new ArrayList<>();
for (int j = 0; j < numOfRow; j++) {
f1List.add(listGeo.get(i - 1));
}
pstmt.setGeometry(1, f1List, BINARY_COLUMN_SIZE);
// add column
pstmt.columnDataAddBatch();
}
// execute
pstmt.columnDataExecuteBatch();
}
}
}
// ANCHOR_END: para_bind

32
docs/examples/java/src/main/java/com/taos/example/RESTConnectExample.java
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@ -5,22 +5,24 @@ import java.sql.DriverManager;
import java.sql.SQLException;
public class RESTConnectExample {
// ANCHOR: main
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
try (Connection conn = DriverManager.getConnection(jdbcUrl)){
System.out.println("Connected to " + jdbcUrl + " successfully.");
// ANCHOR: main
public static void main(String[] args) throws Exception {
String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata";
try (Connection conn = DriverManager.getConnection(jdbcUrl)) {
System.out.println("Connected to " + jdbcUrl + " successfully.");
// you can use the connection for execute SQL here
// you can use the connection for execute SQL here
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to connect to " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to connect to " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to connect to %s, %sErrMessage: %s%n",
jdbcUrl,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
// ANCHOR_END: main
}
// ANCHOR_END: main
}

47
docs/examples/java/src/main/java/com/taos/example/SchemalessJniTest.java Normal file
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@ -0,0 +1,47 @@
package com.taos.example;
import com.taosdata.jdbc.AbstractConnection;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
import com.taosdata.jdbc.enums.SchemalessTimestampType;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
// ANCHOR: schemaless
public class SchemalessJniTest {
private static final String host = "127.0.0.1";
private static final String lineDemo = "meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639";
private static final String telnetDemo = "metric_telnet 1707095283260 4 host=host0 interface=eth0";
private static final String jsonDemo = "{\"metric\": \"metric_json\",\"timestamp\": 1626846400,\"value\": 10.3, \"tags\": {\"groupid\": 2, \"location\": \"California.SanFrancisco\", \"id\": \"d1001\"}}";
public static void main(String[] args) throws SQLException {
final String jdbcUrl = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
try (Connection connection = DriverManager.getConnection(jdbcUrl)) {
init(connection);
AbstractConnection conn = connection.unwrap(AbstractConnection.class);
conn.write(lineDemo, SchemalessProtocolType.LINE, SchemalessTimestampType.MILLI_SECONDS);
conn.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
conn.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.NOT_CONFIGURED);
System.out.println("Inserted data with schemaless successfully.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data with schemaless, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
private static void init(Connection connection) throws SQLException {
try (Statement stmt = connection.createStatement()) {
stmt.execute("CREATE DATABASE IF NOT EXISTS power");
stmt.execute("USE power");
}
}
}
// ANCHOR_END: schemaless

47
docs/examples/java/src/main/java/com/taos/example/SchemalessWsTest.java Normal file
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@ -0,0 +1,47 @@
package com.taos.example;
import com.taosdata.jdbc.AbstractConnection;
import com.taosdata.jdbc.enums.SchemalessProtocolType;
import com.taosdata.jdbc.enums.SchemalessTimestampType;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
// ANCHOR: schemaless
public class SchemalessWsTest {
private static final String host = "127.0.0.1";
private static final String lineDemo = "meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639";
private static final String telnetDemo = "metric_telnet 1707095283260 4 host=host0 interface=eth0";
private static final String jsonDemo = "{\"metric\": \"metric_json\",\"timestamp\": 1626846400,\"value\": 10.3, \"tags\": {\"groupid\": 2, \"location\": \"California.SanFrancisco\", \"id\": \"d1001\"}}";
public static void main(String[] args) throws SQLException {
final String url = "jdbc:TAOS-RS://" + host + ":6041?user=root&password=taosdata&batchfetch=true";
try(Connection connection = DriverManager.getConnection(url)){
init(connection);
AbstractConnection conn = connection.unwrap(AbstractConnection.class);
conn.write(lineDemo, SchemalessProtocolType.LINE, SchemalessTimestampType.MILLI_SECONDS);
conn.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
conn.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.SECONDS);
System.out.println("Inserted data with schemaless successfully.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data with schemaless, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
private static void init(Connection connection) throws SQLException {
try (Statement stmt = connection.createStatement()) {
stmt.execute("CREATE DATABASE IF NOT EXISTS power");
stmt.execute("USE power");
}
}
}
// ANCHOR_END: schemaless

25
docs/examples/java/src/main/java/com/taos/example/Util.java Normal file
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@ -0,0 +1,25 @@
package com.taos.example;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
public class Util {
public static void printResult(ResultSet resultSet) throws SQLException {
ResultSetMetaData metaData = resultSet.getMetaData();
for (int i = 1; i <= metaData.getColumnCount(); i++) {
String columnLabel = metaData.getColumnLabel(i);
System.out.printf(" %s |", columnLabel);
}
System.out.println();
System.out.println("-------------------------------------------------------------");
while (resultSet.next()) {
for (int i = 1; i <= metaData.getColumnCount(); i++) {
String value = resultSet.getString(i);
System.out.printf("%s, ", value);
}
System.out.println();
}
}
}

16
docs/examples/java/src/main/java/com/taos/example/WSConnectExample.java
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@ -9,7 +9,7 @@ import java.util.Properties;
public class WSConnectExample {
// ANCHOR: main
public static void main(String[] args) throws SQLException {
public static void main(String[] args) throws Exception {
// use
// String jdbcUrl =
// "jdbc:TAOS-RS://localhost:6041/dbName?user=root&password=taosdata&batchfetch=true";
@ -25,14 +25,14 @@ public class WSConnectExample {
// you can use the connection for execute SQL here
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed
// exceptions info
System.out.println("Failed to connect to " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: "
+ ex.getMessage());
throw ex;
} catch (Exception ex) {
System.out.println("Failed to connect to " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to connect to %s, %sErrMessage: %s%n",
jdbcUrl,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

67
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@ -0,0 +1,67 @@
package com.taos.example;
import com.taosdata.jdbc.ws.TSWSPreparedStatement;
import java.sql.*;
import java.util.Random;
// ANCHOR: para_bind
public class WSParameterBindingBasicDemo {
// modify host to your own
private static final String host = "127.0.0.1";
private static final Random random = new Random(System.currentTimeMillis());
private static final int numOfSubTable = 10, numOfRow = 10;
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS-RS://" + host + ":6041/?batchfetch=true";
try (Connection conn = DriverManager.getConnection(jdbcUrl, "root", "taosdata")) {
init(conn);
String sql = "INSERT INTO ? USING power.meters TAGS(?,?) VALUES (?,?,?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("d_bind_" + i);
// set tags
pstmt.setTagInt(0, i);
pstmt.setTagString(1, "location_" + i);
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setFloat(2, random.nextFloat() * 30);
pstmt.setInt(3, random.nextInt(300));
pstmt.setFloat(4, random.nextFloat());
pstmt.addBatch();
}
int [] exeResult = pstmt.executeBatch();
// you can check exeResult here
System.out.println("Successfully inserted " + exeResult.length + " rows to power.meters.");
}
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert to table meters using stmt, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
private static void init(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("CREATE DATABASE IF NOT EXISTS power");
stmt.execute("USE power");
stmt.execute("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
}
}
}
// ANCHOR_END: para_bind

180
docs/examples/java/src/main/java/com/taos/example/WSParameterBindingFullDemo.java Normal file
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@ -0,0 +1,180 @@
package com.taos.example;
import com.taosdata.jdbc.ws.TSWSPreparedStatement;
import java.sql.*;
import java.util.Random;
// ANCHOR: para_bind
public class WSParameterBindingFullDemo {
private static final String host = "127.0.0.1";
private static final Random random = new Random(System.currentTimeMillis());
private static final int BINARY_COLUMN_SIZE = 30;
private static final String[] schemaList = {
"create table stable1(ts timestamp, f1 tinyint, f2 smallint, f3 int, f4 bigint) tags(t1 tinyint, t2 smallint, t3 int, t4 bigint)",
"create table stable2(ts timestamp, f1 float, f2 double) tags(t1 float, t2 double)",
"create table stable3(ts timestamp, f1 bool) tags(t1 bool)",
"create table stable4(ts timestamp, f1 binary(" + BINARY_COLUMN_SIZE + ")) tags(t1 binary(" + BINARY_COLUMN_SIZE + "))",
"create table stable5(ts timestamp, f1 nchar(" + BINARY_COLUMN_SIZE + ")) tags(t1 nchar(" + BINARY_COLUMN_SIZE + "))"
};
private static final int numOfSubTable = 10, numOfRow = 10;
public static void main(String[] args) throws SQLException {
String jdbcUrl = "jdbc:TAOS-RS://" + host + ":6041/?batchfetch=true";
try (Connection conn = DriverManager.getConnection(jdbcUrl, "root", "taosdata")) {
init(conn);
bindInteger(conn);
bindFloat(conn);
bindBoolean(conn);
bindBytes(conn);
bindString(conn);
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
throw ex;
}
}
private static void init(Connection conn) throws SQLException {
try (Statement stmt = conn.createStatement()) {
stmt.execute("drop database if exists test_ws_parabind");
stmt.execute("create database if not exists test_ws_parabind");
stmt.execute("use test_ws_parabind");
for (int i = 0; i < schemaList.length; i++) {
stmt.execute(schemaList[i]);
}
}
}
private static void bindInteger(Connection conn) throws SQLException {
String sql = "insert into ? using stable1 tags(?,?,?,?) values(?,?,?,?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t1_" + i);
// set tags
pstmt.setTagByte(1, Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setTagShort(2, Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setTagInt(3, random.nextInt(Integer.MAX_VALUE));
pstmt.setTagLong(4, random.nextLong());
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setByte(2, Byte.parseByte(Integer.toString(random.nextInt(Byte.MAX_VALUE))));
pstmt.setShort(3, Short.parseShort(Integer.toString(random.nextInt(Short.MAX_VALUE))));
pstmt.setInt(4, random.nextInt(Integer.MAX_VALUE));
pstmt.setLong(5, random.nextLong());
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindFloat(Connection conn) throws SQLException {
String sql = "insert into ? using stable2 tags(?,?) values(?,?,?)";
try(TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t2_" + i);
// set tags
pstmt.setTagFloat(1, random.nextFloat());
pstmt.setTagDouble(2, random.nextDouble());
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setFloat(2, random.nextFloat());
pstmt.setDouble(3, random.nextDouble());
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindBoolean(Connection conn) throws SQLException {
String sql = "insert into ? using stable3 tags(?) values(?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t3_" + i);
// set tags
pstmt.setTagBoolean(1, random.nextBoolean());
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setBoolean(2, random.nextBoolean());
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindBytes(Connection conn) throws SQLException {
String sql = "insert into ? using stable4 tags(?) values(?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t4_" + i);
// set tags
pstmt.setTagString(1, new String("abc"));
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(1, new Timestamp(current + j));
pstmt.setString(2, "abc");
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
private static void bindString(Connection conn) throws SQLException {
String sql = "insert into ? using stable5 tags(?) values(?,?)";
try (TSWSPreparedStatement pstmt = conn.prepareStatement(sql).unwrap(TSWSPreparedStatement.class)) {
for (int i = 1; i <= numOfSubTable; i++) {
// set table name
pstmt.setTableName("t5_" + i);
// set tags
pstmt.setTagNString(1, "California.SanFrancisco");
// set columns
long current = System.currentTimeMillis();
for (int j = 0; j < numOfRow; j++) {
pstmt.setTimestamp(0, new Timestamp(current + j));
pstmt.setNString(1, "California.SanFrancisco");
pstmt.addBatch();
}
pstmt.executeBatch();
}
}
}
}
// ANCHOR_END: para_bind

384
docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java Normal file
View File

@ -0,0 +1,384 @@
package com.taos.example;
import com.alibaba.fastjson.JSON;
import com.taosdata.jdbc.TSDBDriver;
import com.taosdata.jdbc.tmq.*;
import java.sql.*;
import java.time.Duration;
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
// ANCHOR: consumer_demo
public class WsConsumerLoopFull {
static private Connection connection;
static private Statement statement;
static private volatile boolean stopThread = false;
public static TaosConsumer<ResultBean> getConsumer() throws Exception {
// ANCHOR: create_consumer
Properties config = new Properties();
config.setProperty("td.connect.type", "ws");
config.setProperty("bootstrap.servers", "localhost:6041");
config.setProperty("auto.offset.reset", "latest");
config.setProperty("msg.with.table.name", "true");
config.setProperty("enable.auto.commit", "true");
config.setProperty("auto.commit.interval.ms", "1000");
config.setProperty("group.id", "group1");
config.setProperty("client.id", "1");
config.setProperty("td.connect.user", "root");
config.setProperty("td.connect.pass", "taosdata");
config.setProperty("value.deserializer", "com.taos.example.WsConsumerLoopFull$ResultDeserializer");
config.setProperty("value.deserializer.encoding", "UTF-8");
try {
TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"));
return consumer;
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create websocket consumer, host: %s, %sErrMessage: %s%n",
config.getProperty("bootstrap.servers"),
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_consumer
}
public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: poll_data_code_piece
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
for (int i = 0; i < 50; i++) {
// poll data
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process the data here
System.out.println("data: " + JSON.toJSONString(bean));
}
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to poll data, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: poll_data_code_piece
}
public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: consumer_seek
try {
List<String> topics = Collections.singletonList("topic_meters");
// subscribe to the topics
consumer.subscribe(topics);
System.out.println("Subscribe topics successfully.");
Set<TopicPartition> assignment = consumer.assignment();
System.out.println("Now assignment: " + JSON.toJSONString(assignment));
ConsumerRecords<ResultBean> records = ConsumerRecords.emptyRecord();
// make sure we have got some data
while (records.isEmpty()) {
records = consumer.poll(Duration.ofMillis(100));
}
consumer.seekToBeginning(assignment);
System.out.println("Assignment seek to beginning successfully.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute seek example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: consumer_seek
}
public static void commitExample(TaosConsumer<ResultBean> consumer) throws SQLException {
// ANCHOR: commit_code_piece
try {
List<String> topics = Collections.singletonList("topic_meters");
consumer.subscribe(topics);
for (int i = 0; i < 50; i++) {
ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<ResultBean> record : records) {
ResultBean bean = record.value();
// process your data here
System.out.println("data: " + JSON.toJSONString(bean));
}
if (!records.isEmpty()) {
// after processing the data, commit the offset manually
consumer.commitSync();
System.out.println("Commit offset manually successfully.");
}
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute commit example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: commit_code_piece
}
public static void unsubscribeExample(TaosConsumer<ResultBean> consumer) throws SQLException {
List<String> topics = Collections.singletonList("topic_meters");
consumer.subscribe(topics);
// ANCHOR: unsubscribe_data_code_piece
try {
// unsubscribe the consumer
consumer.unsubscribe();
System.out.println("Consumer unsubscribed successfully.");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to unsubscribe consumer, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
finally {
// close the consumer
consumer.close();
System.out.println("Consumer closed successfully.");
}
// ANCHOR_END: unsubscribe_data_code_piece
}
public static class ResultDeserializer extends ReferenceDeserializer<ResultBean> {
}
// use this class to define the data structure of the result record
public static class ResultBean {
private Timestamp ts;
private double current;
private int voltage;
private double phase;
private int groupid;
private String location;
public Timestamp getTs() {
return ts;
}
public void setTs(Timestamp ts) {
this.ts = ts;
}
public double getCurrent() {
return current;
}
public void setCurrent(double current) {
this.current = current;
}
public int getVoltage() {
return voltage;
}
public void setVoltage(int voltage) {
this.voltage = voltage;
}
public double getPhase() {
return phase;
}
public void setPhase(double phase) {
this.phase = phase;
}
public int getGroupid() {
return groupid;
}
public void setGroupid(int groupid) {
this.groupid = groupid;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
}
public static void prepareData() throws SQLException, InterruptedException {
try {
int i = 0;
while (!stopThread) {
String insertQuery = "INSERT INTO power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') VALUES (NOW + " + i + "a, 10.30000, 219, 0.31000) ";
int affectedRows = statement.executeUpdate(insertQuery);
assert affectedRows == 1;
i++;
Thread.sleep(1);
}
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
public static void prepareMeta() throws SQLException {
try {
statement.executeUpdate("CREATE DATABASE IF NOT EXISTS power");
statement.executeUpdate("USE power");
statement.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
statement.executeUpdate("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create db and table, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
public static void initConnection() throws SQLException {
String url = "jdbc:TAOS://localhost:6030?user=root&password=taosdata";
Properties properties = new Properties();
properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "C");
properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
try {
connection = DriverManager.getConnection(url, properties);
} catch (SQLException ex) {
System.out.println("Failed to create connection, url:" + url + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create connection", ex);
}
try {
statement = connection.createStatement();
} catch (SQLException ex) {
System.out.println("Failed to create statement, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create statement", ex);
}
System.out.println("Connection created successfully.");
}
public static void closeConnection() throws SQLException {
try {
if (statement != null) {
statement.close();
}
} catch (SQLException ex) {
System.out.println("Failed to close statement, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to close statement", ex);
}
try {
if (connection != null) {
connection.close();
}
} catch (SQLException ex) {
System.out.println("Failed to close connection, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to close connection", ex);
}
System.out.println("Connection closed Successfully.");
}
public static void main(String[] args) throws SQLException, InterruptedException {
initConnection();
prepareMeta();
// create a single thread executor
ExecutorService executor = Executors.newSingleThreadExecutor();
// submit a task
executor.submit(() -> {
try {
prepareData();
} catch (SQLException ex) {
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + ", ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to prepare data, ErrMessage: " + ex.getMessage());
return;
}
System.out.println("pollDataExample executed successfully.");
});
try {
TaosConsumer<ResultBean> consumer = getConsumer();
pollExample(consumer);
System.out.println("pollExample executed successfully.");
consumer.unsubscribe();
seekExample(consumer);
System.out.println("seekExample executed successfully.");
consumer.unsubscribe();
commitExample(consumer);
System.out.println("commitExample executed successfully.");
consumer.unsubscribe();
unsubscribeExample(consumer);
System.out.println("unsubscribeExample executed successfully");
} catch (SQLException ex) {
System.out.println("Failed to poll data from topic_meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to poll data from topic_meters, ErrMessage: " + ex.getMessage());
return;
}
stopThread = true;
// close the executor, which will make the executor reject new tasks
executor.shutdown();
try {
// wait for the executor to terminate
boolean result = executor.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
assert result;
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} catch (Exception e) {
e.printStackTrace();
System.out.println("Wait executor termination failed.");
}
closeConnection();
System.out.println("program end.");
}
}
// ANCHOR_END: consumer_demo

4
docs/examples/node/websocketexample/line_example.js
View File

@ -28,7 +28,7 @@ async function test() {
console.log("Inserted data with schemaless successfully.")
}
catch (err) {
console.error("Failed to insert data with schemaless, url:"+ dsn +", ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to insert data with schemaless, ErrCode: " + err.code + ", ErrMessage: " + err.message);
}
finally {
if (wsRows) {
@ -40,4 +40,4 @@ async function test() {
taos.destroy();
}
}
test()
test()

51
docs/examples/node/websocketexample/sql_example.js
View File

@ -9,11 +9,11 @@ async function createConnect() {
conf.setUser('root');
conf.setPwd('taosdata');
conf.setDb('power');
conn = await taos.sqlConnect(conf);
conn = await taos.sqlConnect(conf);
console.log("Connected to " + dsn + " successfully.");
return conn;
return conn;
} catch (err) {
console.log("Failed to connect to " + dns + "; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.log("Failed to connect to " + dns + ", ErrCode: " + err.code + ", ErrMessage: " + err.message);
throw err;
}
@ -29,13 +29,13 @@ async function createDbAndTable() {
await wsSql.exec('CREATE DATABASE IF NOT EXISTS power');
console.log("Create database power successfully.");
// create table
await wsSql.exec('CREATE STABLE IF NOT EXISTS power.meters ' +
'(_ts timestamp, current float, voltage int, phase float) ' +
'TAGS (location binary(64), groupId int);');
await wsSql.exec('CREATE STABLE IF NOT EXISTS power.meters ' +
'(_ts timestamp, current float, voltage int, phase float) ' +
'TAGS (location binary(64), groupId int);');
console.log("Create stable power.meters successfully");
} catch (err) {
console.error("Failed to create db and table, url:" + dns + "; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to create database power or stable meters, ErrCode: " + err.code + ", ErrMessage: " + err.message);
} finally {
if (wsSql) {
await wsSql.close();
@ -51,18 +51,18 @@ async function insertData() {
try {
wsSql = await createConnect();
let insertQuery = "INSERT INTO " +
"power.d1001 USING power.meters (location, groupId) TAGS('California.SanFrancisco', 2) " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS('California.SanFrancisco', 3) " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
"power.d1001 USING power.meters (location, groupId) TAGS('California.SanFrancisco', 2) " +
"VALUES " +
"(NOW + 1a, 10.30000, 219, 0.31000) " +
"(NOW + 2a, 12.60000, 218, 0.33000) " +
"(NOW + 3a, 12.30000, 221, 0.31000) " +
"power.d1002 USING power.meters TAGS('California.SanFrancisco', 3) " +
"VALUES " +
"(NOW + 1a, 10.30000, 218, 0.25000) ";
taosResult = await wsSql.exec(insertQuery);
console.log("Successfully inserted " + taosResult.getAffectRows() + " rows to power.meters.");
} catch (err) {
console.error("Failed to insert data to power.meters, url:" + dsn + "; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to insert data to power.meters, ErrCode: " + err.code + ", ErrMessage: " + err.message);
} finally {
if (wsSql) {
await wsSql.close();
@ -75,21 +75,22 @@ async function insertData() {
async function queryData() {
let wsRows = null;
let wsSql = null;
let sql = 'SELECT ts, current, location FROM power.meters limit 100';
try {
wsSql = await createConnect();
wsRows = await wsSql.query('SELECT ts, current, location FROM power.meters limit 100');
wsRows = await wsSql.query(sql);
while (await wsRows.next()) {
let row = wsRows.getData();
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
}
}
catch (err) {
console.error("Failed to query data from power.meters, url:" + dsn + " ; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to query data from power.meters, sql: " + sql + ", ErrCode:" + err.code + ", ErrMessage: " + err.message);
}
finally {
if (wsRows) {
await wsRows.close();
}
}
if (wsSql) {
await wsSql.close();
}
@ -107,16 +108,16 @@ async function sqlWithReqid() {
wsRows = await wsSql.query('SELECT ts, current, location FROM power.meters limit 100', reqId);
while (await wsRows.next()) {
let row = wsRows.getData();
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
console.log('ts: ' + row[0] + ', current: ' + row[1] + ', location: ' + row[2]);
}
}
catch (err) {
console.error("Failed to execute sql with reqId: " + reqId + ", ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to execute sql with reqId: " + reqId + ", ErrCode: " + err.code + ", ErrMessage: " + err.message);
}
finally {
if (wsRows) {
await wsRows.close();
}
}
if (wsSql) {
await wsSql.close();
}
@ -129,7 +130,7 @@ async function test() {
await insertData();
await queryData();
await sqlWithReqid();
taos.destroy();
taos.destroy();
}
test()
test()

4
docs/examples/node/websocketexample/stmt_example.js
View File

@ -3,7 +3,7 @@ const taos = require("@tdengine/websocket");
let db = 'power';
let stable = 'meters';
let numOfSubTable = 10;
let numOfRow = 10;
let numOfRow = 10;
let dsn = 'ws://localhost:6041'
function getRandomInt(min, max) {
min = Math.ceil(min);
@ -59,7 +59,7 @@ async function prepare() {
}
}
catch (err) {
console.error("Failed to insert to table meters using stmt, url:" + dsn + "ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to insert to table meters using stmt, ErrCode: " + err.code + ", ErrMessage: " + err.message);
}
finally {
if (stmt) {

17
docs/examples/node/websocketexample/tmq_example.js
View File

@ -23,11 +23,11 @@ async function createConsumer() {
conn = await taos.tmqConnect(configMap);
console.log(`Create consumer successfully, host: ${url}, groupId: ${groupId}, clientId: ${clientId}`)
return conn;
}catch (err) {
console.log("Failed to create websocket consumer, ErrCode:" + err.code + "; ErrMessage: " + err.message);
} catch (err) {
console.log("Failed to create websocket consumer, ErrCode:" + err.code + ", ErrMessage: " + err.message);
throw err;
}
}
// ANCHOR_END: create_consumer
@ -38,7 +38,7 @@ async function prepare() {
conf.setDb('power');
const createDB = `CREATE DATABASE IF NOT EXISTS ${db}`;
const createStable = `CREATE STABLE IF NOT EXISTS ${db}.${stable} (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int);`;
let wsSql = await taos.sqlConnect(conf);
await wsSql.exec(createDB);
await wsSql.exec(createStable);
@ -64,9 +64,9 @@ async function subscribe(consumer) {
}
consumer.commit();
console.log("Commit offset manually successfully.");
}
}
} catch (err) {
console.error("Failed to poll data; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to poll data, ErrCode: " + err.code + ", ErrMessage: " + err.message);
throw err;
}
// ANCHOR_END: commit
@ -78,16 +78,17 @@ async function test() {
try {
await prepare();
let consumer = await createConsumer()
await subscribe(consumer)
await subscribe(consumer)
await consumer.unsubscribe();
console.log("Consumer unsubscribed successfully.");
}
catch (err) {
console.error("Failed to unsubscribe consume, ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to unsubscribe consumer, ErrCode: " + err.code + ", ErrMessage: " + err.message);
}
finally {
if (consumer) {
await consumer.close();
console.log("Consumer closed successfully.");
}
taos.destroy();
}

4
docs/examples/node/websocketexample/tmq_seek_example.js
View File

@ -59,7 +59,7 @@ async function subscribe(consumer) {
}
}
} catch (err) {
console.error("Failed to poll data; ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to poll data, ErrCode: " + err.code + ", ErrMessage: " + err.message);
throw err;
}
@ -83,7 +83,7 @@ async function test() {
console.log("Assignment seek to beginning successfully");
}
catch (err) {
console.error("Seek example failed, ErrCode:" + err.code + "; ErrMessage: " + err.message);
console.error("Failed to execute seek example, ErrCode: " + err.code + ", ErrMessage: " + err.message);
}
finally {
if (consumer) {

4
docs/examples/python/connect_example.py
View File

@ -14,11 +14,11 @@ def create_connection():
)
print(f"Connected to {host}:{port} successfully.");
except Exception as err:
print(f"Failed to connect to {host}:{port} ; ErrMessage:{err}")
print(f"Failed to connect to {host}:{port} , ErrMessage:{err}")
finally:
if conn:
conn.close()
if __name__ == "__main__":
create_connection()
create_connection()

2
docs/examples/python/connect_rest_example.py
View File

@ -12,7 +12,7 @@ def create_connection():
print(f"Connected to {url} successfully.");
except Exception as err:
print(f"Failed to connect to {url} ; ErrMessage:{err}")
print(f"Failed to connect to {url} , ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/connect_websocket_examples.py
View File

@ -14,7 +14,7 @@ def create_connection():
)
print(f"Connected to {host}:{port} successfully.");
except Exception as err:
print(f"Failed to connect to {host}:{port} ; ErrMessage:{err}")
print(f"Failed to connect to {host}:{port} , ErrMessage:{err}")
return conn
# ANCHOR_END: connect

2
docs/examples/python/create_db_native.py
View File

@ -20,7 +20,7 @@ try:
print(f"Create stable power.meters successfully, rowsAffected: {rowsAffected}");
except Exception as err:
print(f"Failed to create db and table, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to create database power or stable meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/create_db_rest.py
View File

@ -19,7 +19,7 @@ try:
print(f"Create stable power.meters successfully, rowsAffected: {rowsAffected}");
except Exception as err:
print(f"Failed to create db and table, url:{url} ; ErrMessage:{err}")
print(f"Failed to create database power or stable meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/create_db_ws.py
View File

@ -20,7 +20,7 @@ try:
print(f"Create stable power.meters successfully, rowsAffected: {rowsAffected}");
except Exception as err:
print(f"Failed to create db and table, db addrr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to create database power or stable meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/insert_native.py
View File

@ -21,7 +21,7 @@ try:
print(f"Successfully inserted {affectedRows} rows to power.meters.")
except Exception as err:
print(f"Failed to insert data to power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert data to power.meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/insert_rest.py
View File

@ -20,7 +20,7 @@ try:
print(f"Successfully inserted {affectedRows} rows to power.meters.")
except Exception as err:
print(f"Failed to insert data to power.meters, url:{url} ; ErrMessage:{err}")
print(f"Failed to insert data to power.meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/insert_ws.py
View File

@ -21,7 +21,7 @@ try:
print(f"Successfully inserted {affectedRows} rows to power.meters.")
except Exception as err:
print(f"Failed to insert data to power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert data to power.meters, ErrMessage:{err}")
finally:
if conn:
conn.close()

8
docs/examples/python/query_native.py
View File

@ -7,15 +7,15 @@ try:
port=port,
user="root",
password="taosdata")
result = conn.query("SELECT ts, current, location FROM power.meters limit 100")
sql = "SELECT ts, current, location FROM power.meters limit 100"
result = conn.query(sql)
# Get data from result as list of tuple
data = result.fetch_all()
for row in data:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to query data from power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to query data from power.meters, sql: {sql}, ErrMessage:{err}")
finally:
if conn:
conn.close()
conn.close()

6
docs/examples/python/query_rest.py
View File

@ -7,11 +7,11 @@ try:
user="root",
password="taosdata",
timeout=30)
result = client.sql(f"SELECT ts, current, location FROM power.meters limit 100")
sql = f"SELECT ts, current, location FROM power.meters limit 100"
result = client.sql(sql)
if result["data"]:
for row in result["data"]:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to query data from power.meters, url:{url} ; ErrMessage:{err}")
print(f"Failed to query data from power.meters, sql: {sql}, ErrMessage:{err}")

6
docs/examples/python/query_ws.py
View File

@ -8,13 +8,13 @@ try:
password="taosdata",
host=host,
port=port)
result = conn.query("SELECT ts, current, location FROM power.meters limit 100")
sql = "SELECT ts, current, location FROM power.meters limit 100"
result = conn.query(sql)
for row in result:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to query data from power.meters, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to query data from power.meters, sql: {sql}, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/reqid_native.py
View File

@ -17,7 +17,7 @@ try:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to execute sql with reqId:{reqId}, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to execute sql with reqId:{reqId}, ErrMessage:{err}")
finally:
if conn:

2
docs/examples/python/reqid_rest.py
View File

@ -15,4 +15,4 @@ try:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to execute sql with reqId:{reqId}, url:{url} ; ErrMessage:{err}")
print(f"Failed to execute sql with reqId:{reqId}, ErrMessage:{err}")

2
docs/examples/python/reqid_ws.py
View File

@ -18,7 +18,7 @@ try:
print(f"ts: {row[0]}, current: {row[1]}, location: {row[2]}")
except Exception as err:
print(f"Failed to execute sql with reqId:{reqId}, db addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to execute sql with reqId:{reqId}, ErrMessage:{err}")
finally:
if conn:
conn.close()

2
docs/examples/python/schemaless_native.py
View File

@ -34,7 +34,7 @@ try:
)
print("Inserted data with schemaless successfully.");
except Exception as err:
print(f"Failed to insert data with schemaless, addr: {host}:{port} ErrMessage:{err}")
print(f"Failed to insert data with schemaless, ErrMessage:{err}")
finally:
if conn:
conn.close()

4
docs/examples/python/schemaless_ws.py
View File

@ -66,7 +66,7 @@ def schemaless_insert():
)
print("Inserted data with schemaless successfully.");
except Exception as err:
print(f"Failed to insert data with schemaless, addr: {host}:{port} ErrMessage:{err}")
print(f"Failed to insert data with schemaless, ErrMessage:{err}")
raise err
finally:
@ -78,4 +78,4 @@ if __name__ == "__main__":
prepare()
schemaless_insert
except Exception as err:
print(f"Failed to insert data with schemaless, err:{err}")
print(f"Failed to insert data with schemaless, err:{err}")

2
docs/examples/python/stmt_native.py
View File

@ -56,7 +56,7 @@ try:
print(f"Successfully inserted to power.meters.")
except Exception as err:
print(f"Failed to insert to table meters using stmt, addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert to table meters using stmt, ErrMessage:{err}")
finally:
if stmt:
stmt.close()

2
docs/examples/python/stmt_ws.py
View File

@ -61,7 +61,7 @@ try:
print(f"Successfully inserted to power.meters.")
except Exception as err:
print(f"Failed to insert to table meters using stmt, addr:{host}:{port} ; ErrMessage:{err}")
print(f"Failed to insert to table meters using stmt, ErrMessage:{err}")
finally:
if stmt:
stmt.close()

11
docs/examples/python/tmq_native.py
View File

@ -70,7 +70,7 @@ def create_consumer():
print(f"Create consumer successfully, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}");
return consumer
except Exception as err:
print(f"Failed to create native consumer, host: {host}:{port} ; ErrMessage:{err}");
print(f"Failed to create native consumer, host: {host}:{port}, ErrMessage:{err}");
raise err
# ANCHOR_END: create_consumer
@ -123,7 +123,7 @@ def commit_offset(consumer):
print("Commit offset manually successfully.");
except Exception as err:
print(f"Failed to poll data, ErrMessage:{err}")
print(f"Failed to execute commit example, ErrMessage:{err}")
raise err
# ANCHOR_END: commit_offset
@ -138,7 +138,7 @@ def seek_offset(consumer):
consumer.seek(partition)
print(f"Assignment seek to beginning successfully");
except Exception as err:
print(f"Seek example failed; ErrMessage:{err}")
print(f"Failed to execute seek example, ErrMessage:{err}")
raise err
# ANCHOR_END: assignment
@ -151,7 +151,8 @@ def unsubscribe(consumer):
print(f"Failed to unsubscribe consumer. ErrMessage:{err}")
finally:
if consumer:
consumer.close()
consumer.close()
print("Consumer closed successfully.");
# ANCHOR_END: unsubscribe
if __name__ == "__main__":
@ -165,7 +166,7 @@ if __name__ == "__main__":
consumer.unsubscribe()
print("Consumer unsubscribed successfully.");
except Exception as err:
print(f"Failed to stmt consumer. ErrMessage:{err}")
print(f"Failed to execute consumer example, ErrMessage:{err}")
finally:
consumer.unsubscribe()

13
docs/examples/python/tmq_websocket_example.py
View File

@ -78,7 +78,7 @@ def create_consumer():
print(f"Create consumer successfully, host: {host}:{port}, groupId: {groupId}, clientId: {clientId}");
return consumer;
except Exception as err:
print(f"Failed to create websocket consumer, host: {host}:{port} ; ErrMessage:{err}");
print(f"Failed to create websocket consumer, host: {host}:{port}, ErrMessage:{err}");
raise err
@ -98,7 +98,7 @@ def seek_offset(consumer):
print("Assignment seek to beginning successfully");
except Exception as err:
print(f"Seek example failed; ErrMessage:{err}")
print(f"Failed to execute seek example, ErrMessage:{err}")
raise err
# ANCHOR_END: assignment
@ -137,7 +137,7 @@ def commit_offset(consumer):
print("Commit offset manually successfully.");
except Exception as err:
print(f"Failed to poll data, ErrMessage:{err}")
print(f"Failed to execute commit example, ErrMessage:{err}")
raise err
@ -153,7 +153,8 @@ def unsubscribe(consumer):
print(f"Failed to unsubscribe consumer. ErrMessage:{err}")
finally:
if consumer:
consumer.close()
consumer.close()
print("Consumer closed successfully.");
# ANCHOR_END: unsubscribe
@ -166,6 +167,6 @@ if __name__ == "__main__":
seek_offset(consumer)
commit_offset(consumer)
except Exception as err:
print(f"Failed to stmt consumer. ErrorMessage:{err}")
print(f"Failed to execute consumer example, ErrorMessage:{err}")
finally:
unsubscribe(consumer);
unsubscribe(consumer);

2
docs/examples/rust/nativeexample/examples/connect.rs
View File

@ -10,7 +10,7 @@ async fn main() -> anyhow::Result<()> {
Ok(())
}
Err(err) => {
eprintln!("Failed to connect to {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to connect to {}, ErrMessage: {}", dsn, err);
return Err(err.into());
}
}

4
docs/examples/rust/nativeexample/examples/createdb.rs
View File

@ -13,7 +13,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create database power successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create database power; ErrMessage: {}", err);
eprintln!("Failed to create database power, ErrMessage: {}", err);
return Err(err.into());
}
}
@ -25,7 +25,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create stable power.meters successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create stable power.meters; ErrMessage: {}", err);
eprintln!("Failed to create stable power.meters, ErrMessage: {}", err);
return Err(err.into());
}
}

2
docs/examples/rust/nativeexample/examples/insert.rs
View File

@ -20,7 +20,7 @@ async fn main() -> anyhow::Result<()> {
(NOW + 1a, 10.30000, 218, 0.25000) "#).await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert data to power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert data to power.meters, ErrMessage: {}", err);
return Err(err.into());
}
}

10
docs/examples/rust/nativeexample/examples/query.rs
View File

@ -11,7 +11,8 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: query_data
// query data, make sure the database and table are created before
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await{
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query(sql).await{
Ok(mut result) => {
for field in result.fields() {
println!("got field: {}", field.name());
@ -30,7 +31,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -51,6 +52,7 @@ async fn main() -> anyhow::Result<()> {
location: String,
}
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await {
Ok(mut query) => {
match query.deserialize::<Record>().try_collect::<Vec<_>>().await {
@ -64,7 +66,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, url: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -92,7 +94,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to execute sql with reqId: {}, dsn: {}; ErrMessage: {}", req_id, dsn, err);
eprintln!("Failed to execute sql with reqId: {}, ErrMessage: {}", req_id, err);
return Err(err.into());
}
}

6
docs/examples/rust/nativeexample/examples/schemaless.rs
View File

@ -43,7 +43,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -65,7 +65,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -96,7 +96,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}

26
docs/examples/rust/nativeexample/examples/stmt.rs
View File

@ -20,7 +20,13 @@ async fn main() -> anyhow::Result<()> {
let tags = vec![Value::Int(i as i32), Value::VarChar(format!("location_{}", i).into())];
// set table name and tags for the prepared statement.
stmt.set_tbname_tags(&table_name, &tags).await?;
match stmt.set_tbname_tags(&table_name, &tags).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to set table name and tags, table_name:{}, tags:{:?}, ErrMessage: {}", table_name, tags, err);
return Err(err.into());
}
}
for j in 0..NUM_ROWS {
let values = vec![
ColumnView::from_millis_timestamp(vec![1648432611249 + j as i64]),
@ -29,17 +35,29 @@ async fn main() -> anyhow::Result<()> {
ColumnView::from_floats(vec![0.31 + j as f32]),
];
// bind values to the prepared statement.
stmt.bind(&values).await?;
match stmt.bind(&values).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to bind values, values:{:?}, ErrMessage: {}", values, err);
return Err(err.into());
}
}
}
stmt.add_batch().await?;
match stmt.add_batch().await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to add batch, ErrMessage: {}", err);
return Err(err.into());
}
}
}
// execute.
match stmt.execute().await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert to table meters using stmt, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert to table meters using stmt, ErrMessage: {}", err);
return Err(err.into());
}
}

16
docs/examples/rust/nativeexample/examples/tmq.rs
View File

@ -53,7 +53,7 @@ async fn main() -> anyhow::Result<()> {
consumer
}
Err(err) => {
eprintln!("Failed to create consumer, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to create websocket consumer, dsn: {}, ErrMessage: {}", dsn, err);
return Err(err.into());
}
};
@ -63,7 +63,7 @@ async fn main() -> anyhow::Result<()> {
match consumer.subscribe(["topic_meters"]).await{
Ok(_) => println!("Subscribe topics successfully."),
Err(err) => {
eprintln!("Failed to subscribe topic_meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to subscribe topic_meters, ErrMessage: {}", err);
return Err(err.into());
}
}
@ -100,7 +100,7 @@ async fn main() -> anyhow::Result<()> {
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to execute consumer functions. ErrMessage: {:?}", e);
eprintln!("Failed to poll data; ErrMessage: {:?}", e);
e
})?;
@ -125,14 +125,14 @@ async fn main() -> anyhow::Result<()> {
match consumer.commit(offset).await{
Ok(_) => println!("Commit offset manually successfully."),
Err(err) => {
eprintln!("Failed to commit offset manually, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to commit offset manually, ErrMessage: {}", err);
return Err(err.into());
}
}
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to execute consumer functions. ErrMessage: {:?}", e);
eprintln!("Failed to poll data, ErrMessage: {:?}", e);
e
})?;
// ANCHOR_END: consumer_commit_manually
@ -140,7 +140,7 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: seek_offset
let assignments = consumer.assignments().await.unwrap();
println!("Now assignments: {:?}", assignments);
println!("assignments: {:?}", assignments);
// seek offset
for topic_vec_assignment in assignments {
@ -163,14 +163,14 @@ async fn main() -> anyhow::Result<()> {
match consumer.offset_seek(topic, vgroup_id, begin).await{
Ok(_) => (),
Err(err) => {
eprintln!("Seek example failed; ErrMessage: {}", err);
eprintln!("Failed to seek offset, ErrMessage: {}", err);
return Err(err.into());
}
}
}
let topic_assignment = consumer.topic_assignment(topic).await;
println!("Topic assignment: {:?}", topic_assignment);
println!("topic assignment: {:?}", topic_assignment);
}
println!("Assignment seek to beginning successfully.");
// after seek offset

2
docs/examples/rust/restexample/examples/connect.rs
View File

@ -10,7 +10,7 @@ async fn main() -> anyhow::Result<()> {
Ok(())
}
Err(err) => {
eprintln!("Failed to connect to {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to connect to {}, ErrMessage: {}", dsn, err);
return Err(err.into());
}
}

4
docs/examples/rust/restexample/examples/createdb.rs
View File

@ -13,7 +13,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create database power successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create database power; ErrMessage: {}", err);
eprintln!("Failed to create database power, ErrMessage: {}", err);
return Err(err.into());
}
}
@ -25,7 +25,7 @@ async fn main() -> anyhow::Result<()> {
]).await {
Ok(afffected_rows) => println!("Create stable power.meters successfully, rowsAffected: {}", afffected_rows),
Err(err) => {
eprintln!("Failed to create stable power.meters; ErrMessage: {}", err);
eprintln!("Failed to create stable power.meters, ErrMessage: {}", err);
return Err(err.into());
}
}

2
docs/examples/rust/restexample/examples/insert.rs
View File

@ -20,7 +20,7 @@ async fn main() -> anyhow::Result<()> {
(NOW + 1a, 10.30000, 218, 0.25000) "#).await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert data to power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert data to power.meters, ErrMessage: {}", dsn, err);
return Err(err.into());
}
}

10
docs/examples/rust/restexample/examples/query.rs
View File

@ -11,7 +11,8 @@ async fn main() -> anyhow::Result<()> {
// ANCHOR: query_data
// query data, make sure the database and table are created before
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await{
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query(sql).await{
Ok(mut result) => {
for field in result.fields() {
println!("got field: {}", field.name());
@ -30,7 +31,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -51,6 +52,7 @@ async fn main() -> anyhow::Result<()> {
location: String,
}
let sql = "SELECT ts, current, location FROM power.meters limit 100";
match taos.query("SELECT ts, current, location FROM power.meters limit 100").await {
Ok(mut query) => {
match query.deserialize::<Record>().try_collect::<Vec<_>>().await {
@ -64,7 +66,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to query data from power.meters, url: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to query data from power.meters, sql: {}, ErrMessage: {}", sql, err);
return Err(err.into());
}
}
@ -92,7 +94,7 @@ async fn main() -> anyhow::Result<()> {
}
}
Err(err) => {
eprintln!("Failed to execute sql with reqId: {}, dsn: {}; ErrMessage: {}", req_id, dsn, err);
eprintln!("Failed to execute sql with reqId: {}, ErrMessage: {}", req_id, err);
return Err(err.into());
}
}

15
docs/examples/rust/restexample/examples/schemaless.rs
View File

@ -17,6 +17,15 @@ async fn main() -> anyhow::Result<()> {
let client = TaosBuilder::from_dsn(dsn)?.build().await?;
let db = "power";
client
.exec(format!("create database if not exists {db}"))
.await?;
// should specify database before insert
client.exec(format!("use {db}")).await?;
// SchemalessProtocol::Line
let data = [
"meters,groupid=2,location=California.SanFrancisco current=10.3000002f64,voltage=219i32,phase=0.31f64 1626006833639",
@ -34,7 +43,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -56,7 +65,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}
@ -87,7 +96,7 @@ async fn main() -> anyhow::Result<()> {
match client.put(&sml_data).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to insert data with schemaless, host: {}; ErrMessage: {}", host, err);
eprintln!("Failed to insert data with schemaless, data:{:?}, ErrMessage: {}", data, err);
return Err(err.into());
}
}

26
docs/examples/rust/restexample/examples/stmt.rs
View File

@ -20,7 +20,13 @@ async fn main() -> anyhow::Result<()> {
let tags = vec![Value::Int(i as i32), Value::VarChar(format!("location_{}", i).into())];
// set table name and tags for the prepared statement.
stmt.set_tbname_tags(&table_name, &tags).await?;
match stmt.set_tbname_tags(&table_name, &tags).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to set table name and tags, table_name:{}, tags:{:?}, ErrMessage: {}", table_name, tags, err);
return Err(err.into());
}
}
for j in 0..NUM_ROWS {
let values = vec![
ColumnView::from_millis_timestamp(vec![1648432611249 + j as i64]),
@ -29,17 +35,29 @@ async fn main() -> anyhow::Result<()> {
ColumnView::from_floats(vec![0.31 + j as f32]),
];
// bind values to the prepared statement.
stmt.bind(&values).await?;
match stmt.bind(&values).await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to bind values, values:{:?}, ErrMessage: {}", values, err);
return Err(err.into());
}
}
}
stmt.add_batch().await?;
match stmt.add_batch().await{
Ok(_) => {},
Err(err) => {
eprintln!("Failed to add batch, ErrMessage: {}", err);
return Err(err.into());
}
}
}
// execute.
match stmt.execute().await{
Ok(affected_rows) => println!("Successfully inserted {} rows to power.meters.", affected_rows),
Err(err) => {
eprintln!("Failed to insert to table meters using stmt, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to insert to table meters using stmt, ErrMessage: {}", err);
return Err(err.into());
}
}

10
docs/examples/rust/restexample/examples/tmq.rs
View File

@ -53,7 +53,7 @@ async fn main() -> anyhow::Result<()> {
consumer
}
Err(err) => {
eprintln!("Failed to create consumer, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to create websocket consumer, dsn: {}, ErrMessage: {}", dsn, err);
return Err(err.into());
}
};
@ -63,7 +63,7 @@ async fn main() -> anyhow::Result<()> {
match consumer.subscribe(["topic_meters"]).await{
Ok(_) => println!("Subscribe topics successfully."),
Err(err) => {
eprintln!("Failed to subscribe topic_meters, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to subscribe topic_meters, ErrMessage: {}", err);
return Err(err.into());
}
}
@ -125,14 +125,14 @@ async fn main() -> anyhow::Result<()> {
match consumer.commit(offset).await{
Ok(_) => println!("Commit offset manually successfully."),
Err(err) => {
eprintln!("Failed to commit offset manually, dsn: {}; ErrMessage: {}", dsn, err);
eprintln!("Failed to commit offset manually, ErrMessage: {}", err);
return Err(err.into());
}
}
Ok(())
})
.await.map_err(|e| {
eprintln!("Failed to execute consumer functions. ErrMessage: {:?}", e);
eprintln!("Failed to poll data, ErrMessage: {:?}", e);
e
})?;
// ANCHOR_END: consumer_commit_manually
@ -163,7 +163,7 @@ async fn main() -> anyhow::Result<()> {
match consumer.offset_seek(topic, vgroup_id, begin).await{
Ok(_) => (),
Err(err) => {
eprintln!("seek example failed; ErrMessage: {}", err);
eprintln!("Failed to seek offset, ErrMessage: {}", err);
return Err(err.into());
}
}

4
docs/zh/08-develop/01-connect/index.md
View File

@ -544,7 +544,7 @@ C/C++ 语言连接器使用 `taos_connect()` 函数用于建立与 TDengine 数
使用示例如下：
```java
{{#include examples/JDBC/connectionPools/src/main/java/com/taosdata/example/HikariDemo.java:connection_pool}}
{{#include docs/examples/java/src/main/java/com/taos/example/HikariDemo.java:connection_pool}}
```
> 通过 HikariDataSource.getConnection() 获取连接后，使用完成后需要调用 close() 方法，实际上它并不会关闭连接，只是放回连接池中。
@ -555,7 +555,7 @@ C/C++ 语言连接器使用 `taos_connect()` 函数用于建立与 TDengine 数
使用示例如下：
```java
{{#include examples/JDBC/connectionPools/src/main/java/com/taosdata/example/DruidDemo.java:connection_pool}}
{{#include docs/examples/java/src/main/java/com/taos/example/DruidDemo.java:connection_pool}}
```
> 更多 druid 使用问题请查看[官方说明](https://github.com/alibaba/druid)。

8
docs/zh/08-develop/02-sql.md
View File

@ -27,7 +27,7 @@ REST API：直接调用 `taosadapter` 提供的 REST API 接口，进行数据
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcCreatDBDemo.java:create_db_and_table}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcCreatDBDemo.java:create_db_and_table}}
```
</TabItem>
@ -98,7 +98,7 @@ curl --location -uroot:taosdata 'http://127.0.0.1:6041/rest/sql/power' \
<Tabs defaultValue="java" groupId="lang">
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcInsertDataDemo.java:insert_data}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcInsertDataDemo.java:insert_data}}
```
**Note**
@ -170,7 +170,7 @@ curl --location -uroot:taosdata 'http://127.0.0.1:6041/rest/sql' \
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcQueryDemo.java:query_data}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcQueryDemo.java:query_data}}
```
**Note** 查询和操作关系型数据库一致，使用下标获取返回字段内容时从 1 开始，建议使用字段名称获取。
@ -251,7 +251,7 @@ reqId 可用于请求链路追踪，reqId 就像分布式系统中的 traceId
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcReqIdDemo.java:with_reqid}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcReqIdDemo.java:with_reqid}}
```
</TabItem>

4
docs/zh/08-develop/04-schemaless.md
View File

@ -165,7 +165,7 @@ st,t1=3,t2=4,t3=t3 c1=3i64,c6="passit" 1626006833640000000
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessWsTest.java:schemaless}}
{{#include docs/examples/java/src/main/java/com/taos/example/SchemalessWsTest.java:schemaless}}
```
@ -216,7 +216,7 @@ writer.write(lineDemo, SchemalessProtocolType.LINE, SchemalessTimestampType.NANO
<Tabs defaultValue="java" groupId="lang">
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessJniTest.java:schemaless}}
{{#include docs/examples/java/src/main/java/com/taos/example/SchemalessJniTest.java:schemaless}}
```
执行带有 reqId 的无模式写入，最后一个参数 reqId 可用于请求链路追踪。

4
docs/zh/08-develop/05-stmt.md
View File

@ -27,7 +27,7 @@ import TabItem from "@theme/TabItem";
<Tabs defaultValue="java" groupId="lang">
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WSParameterBindingBasicDemo.java:para_bind}}
{{#include docs/examples/java/src/main/java/com/taos/example/WSParameterBindingBasicDemo.java:para_bind}}
```
@ -76,7 +76,7 @@ import TabItem from "@theme/TabItem";
<TabItem label="Java" value="java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ParameterBindingBasicDemo.java:para_bind}}
{{#include docs/examples/java/src/main/java/com/taos/example/ParameterBindingBasicDemo.java:para_bind}}
```
这是一个[更详细的参数绑定示例](https://github.com/taosdata/TDengine/blob/main/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ParameterBindingFullDemo.java)

28
docs/zh/08-develop/07-tmq.md
View File

@ -109,7 +109,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:create_consumer}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:create_consumer}}
```
</TabItem>
@ -168,7 +168,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ConsumerLoopFull.java:create_consumer}}
{{#include docs/examples/java/src/main/java/com/taos/example/ConsumerLoopFull.java:create_consumer}}
```
</TabItem>
@ -229,7 +229,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:poll_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:poll_data_code_piece}}
```
- `subscribe` 方法的参数含义为：订阅的主题列表（即名称），支持同时订阅多个主题。
@ -293,7 +293,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:poll_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:poll_data_code_piece}}
```
- `subscribe` 方法的参数含义为：订阅的主题列表（即名称），支持同时订阅多个主题。
@ -376,7 +376,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:consumer_seek}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:consumer_seek}}
```
1. 使用 consumer.poll 方法轮询数据，直到获取到数据为止。
2. 对于轮询到的第一批数据，打印第一条数据的内容，并获取当前消费者的分区分配信息。
@ -438,7 +438,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:consumer_seek}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:consumer_seek}}
```
1. 使用 consumer.poll 方法轮询数据，直到获取到数据为止。
2. 对于轮询到的第一批数据，打印第一条数据的内容，并获取当前消费者的分区分配信息。
@ -513,7 +513,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:commit_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:commit_code_piece}}
```
</TabItem>
@ -565,7 +565,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:commit_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:commit_code_piece}}
```
</TabItem>
@ -621,7 +621,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
```
</TabItem>
@ -644,7 +644,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
{{#include docs/examples/rust/restexample/examples/tmq.rs:unsubscribe}}
```
**注意**：消费者取消订阅后无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
**注意**：消费者取消订阅后已经关闭，无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
</TabItem>
<TabItem label="Node.js" value="node">
@ -672,7 +672,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<TabItem value="java" label="Java">
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:unsubscribe_data_code_piece}}
```
</TabItem>
@ -694,7 +694,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
{{#include docs/examples/rust/restexample/examples/tmq.rs:unsubscribe}}
```
**注意**：消费者取消订阅后无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
**注意**：消费者取消订阅后已经关闭，无法重用，如果想订阅新的 `topic`， 请重新创建消费者。
</TabItem>
<TabItem label="Node.js" value="node">
不支持
@ -723,7 +723,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<details>
<summary>完整代码示例</summary>
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java:consumer_demo}}
{{#include docs/examples/java/src/main/java/com/taos/example/WsConsumerLoopFull.java:consumer_demo}}
```
**注意**：这里的 value.deserializer 配置参数值应该根据测试环境的包路径做相应的调整。
@ -788,7 +788,7 @@ Rust 连接器创建消费者的参数为 DSN， 可以设置的参数列表请
<details>
<summary>完整代码示例</summary>
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ConsumerLoopFull.java:consumer_demo}}
{{#include docs/examples/java/src/main/java/com/taos/example/ConsumerLoopFull.java:consumer_demo}}
```
**注意**：这里的 value.deserializer 配置参数值应该根据测试环境的包路径做相应的调整。

2
docs/zh/14-reference/05-connector/14-java.mdx
View File

@ -60,7 +60,7 @@ REST 连接支持所有能运行 Java 的平台。
在报错后，通过 SQLException 可以获取到错误的信息和错误码：
```java
{{#include examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcBasicDemo.java:jdbc_exception}}
{{#include docs/examples/java/src/main/java/com/taos/example/JdbcBasicDemo.java:jdbc_exception}}
```
JDBC 连接器可能报错的错误码包括 4 种：

99
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ConsumerLoopFull.java
View File

@ -20,7 +20,7 @@ public class ConsumerLoopFull {
static private Statement statement;
static private volatile boolean stopThread = false;
public static TaosConsumer<ResultBean> getConsumer() throws SQLException {
public static TaosConsumer<ResultBean> getConsumer() throws Exception {
// ANCHOR: create_consumer
Properties config = new Properties();
config.setProperty("td.connect.type", "jni");
@ -38,16 +38,20 @@ public class ConsumerLoopFull {
try {
TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
System.out.println("Create consumer successfully, host: " + config.getProperty("bootstrap.servers") + ", groupId: " + config.getProperty("group.id") + ", clientId: " + config.getProperty("client.id"));
System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"));
return consumer;
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to create native consumer, host: " + config.getProperty("bootstrap.servers") + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to create native consumer, host: " + config.getProperty("bootstrap.servers")
+ "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create native consumer, host: %s, %sErrMessage: %s%n",
config.getProperty("bootstrap.servers"),
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_consumer
}
@ -69,14 +73,14 @@ public class ConsumerLoopFull {
System.out.println("data: " + JSON.toJSONString(bean));
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to poll data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
} catch (Exception ex) {
System.out.println("Failed to poll data, ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to poll data, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: poll_data_code_piece
}
@ -100,13 +104,14 @@ public class ConsumerLoopFull {
consumer.seekToBeginning(assignment);
System.out.println("Assignment seek to beginning successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Seek example failed; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
} catch (Exception ex) {
System.out.println("Seek example failed; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute seek example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: consumer_seek
}
@ -131,13 +136,14 @@ public class ConsumerLoopFull {
System.out.println("Commit offset manually successfully.");
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to execute consumer functions. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
} catch (Exception ex) {
System.out.println("Failed to execute consumer functions. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute commit example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: commit_code_piece
}
@ -150,13 +156,14 @@ public class ConsumerLoopFull {
// unsubscribe the consumer
consumer.unsubscribe();
System.out.println("Consumer unsubscribed successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to unsubscribe consumer. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to unsubscribe consumer. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to unsubscribe consumer, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
finally {
// close the consumer
@ -238,9 +245,14 @@ public class ConsumerLoopFull {
i++;
Thread.sleep(1);
}
} catch (SQLException ex) {
System.out.println("Failed to insert data to power.meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to insert data to power.meters", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -250,9 +262,14 @@ public class ConsumerLoopFull {
statement.executeUpdate("USE power");
statement.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
statement.executeUpdate("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
} catch (SQLException ex) {
System.out.println("Failed to create db and table, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create db and table", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create db and table, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -311,7 +328,7 @@ public class ConsumerLoopFull {
try {
prepareData();
} catch (SQLException ex) {
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + ", ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to prepare data, ErrMessage: " + ex.getMessage());

14
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcCreatDBDemo.java
View File

@ -35,13 +35,13 @@ public class JdbcCreatDBDemo {
rowsAffected = stmt.executeUpdate("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
// you can check rowsAffected here
System.out.println("Create stable power.meters successfully, rowsAffected: " + rowsAffected);
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to create db and table, url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to create db and table, url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create database power or stable meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_db_and_table

13
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcInsertDataDemo.java
View File

@ -40,12 +40,13 @@ public class JdbcInsertDataDemo {
int affectedRows = stmt.executeUpdate(insertQuery);
// you can check affectedRows here
System.out.println("Successfully inserted " + affectedRows + " rows to power.meters.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert data to power.meters, url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert data to power.meters, url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: insert_data

22
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcQueryDemo.java
View File

@ -24,10 +24,11 @@ public class JdbcQueryDemo {
properties.setProperty("timezone", "UTC-8");
System.out.println("get connection starting...");
// ANCHOR: query_data
String sql = "SELECT ts, current, location FROM power.meters limit 100";
try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
Statement stmt = connection.createStatement();
// query data, make sure the database and table are created before
ResultSet resultSet = stmt.executeQuery("SELECT ts, current, location FROM power.meters limit 100")) {
ResultSet resultSet = stmt.executeQuery(sql)) {
Timestamp ts;
float current;
@ -41,19 +42,16 @@ public class JdbcQueryDemo {
// you can check data here
System.out.printf("ts: %s, current: %f, location: %s %n", ts, current, location);
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to query data from power.meters, url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to query data from power.meters, url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to query data from power.meters, sql: %s, %sErrMessage: %s%n",
sql,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: query_data
}
private static void printResult(ResultSet resultSet) throws SQLException {
Util.printResult(resultSet);
}
}

13
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JdbcReqIdDemo.java
View File

@ -45,12 +45,13 @@ public class JdbcReqIdDemo {
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to execute sql with reqId: " + reqId + ", url:" + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to execute sql with reqId: " + reqId + ", url:" + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute sql with reqId: %s, %sErrMessage: %s%n", reqId,
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: with_reqid

13
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/ParameterBindingBasicDemo.java
View File

@ -68,12 +68,13 @@ public class ParameterBindingBasicDemo {
// you can check exeResult here
System.out.println("Successfully inserted " + (numOfSubTable * numOfRow) + " rows to power.meters.");
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert to table meters using stmt, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

13
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessJniTest.java
View File

@ -26,12 +26,13 @@ public class SchemalessJniTest {
conn.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
conn.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.NOT_CONFIGURED);
System.out.println("Inserted data with schemaless successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data with schemaless, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

13
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/SchemalessWsTest.java
View File

@ -26,12 +26,13 @@ public class SchemalessWsTest {
conn.write(telnetDemo, SchemalessProtocolType.TELNET, SchemalessTimestampType.MILLI_SECONDS);
conn.write(jsonDemo, SchemalessProtocolType.JSON, SchemalessTimestampType.SECONDS);
System.out.println("Inserted data with schemaless successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert data with schemaless, host:" + host + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data with schemaless, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

13
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WSParameterBindingBasicDemo.java
View File

@ -47,12 +47,13 @@ public class WSParameterBindingBasicDemo {
System.out.println("Successfully inserted " + exeResult.length + " rows to power.meters.");
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw ex;
} catch (Exception ex){
System.out.println("Failed to insert to table meters using stmt, url: " + jdbcUrl + "; ErrMessage: " + ex.getMessage());
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert to table meters using stmt, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}

108
examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/WsConsumerLoopFull.java
View File

@ -6,11 +6,13 @@ import com.taosdata.jdbc.tmq.*;
import java.sql.*;
import java.time.Duration;
import java.util.*;
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
// ANCHOR: consumer_demo
public class WsConsumerLoopFull {
@ -18,7 +20,7 @@ public class WsConsumerLoopFull {
static private Statement statement;
static private volatile boolean stopThread = false;
public static TaosConsumer<ResultBean> getConsumer() throws SQLException {
public static TaosConsumer<ResultBean> getConsumer() throws Exception {
// ANCHOR: create_consumer
Properties config = new Properties();
config.setProperty("td.connect.type", "ws");
@ -36,16 +38,20 @@ public class WsConsumerLoopFull {
try {
TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
System.out.println("Create consumer successfully, host: " + config.getProperty("bootstrap.servers") + ", groupId: " + config.getProperty("group.id") + ", clientId: " + config.getProperty("client.id"));
System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
config.getProperty("bootstrap.servers"),
config.getProperty("group.id"),
config.getProperty("client.id"));
return consumer;
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to create websocket consumer, host: " + config.getProperty("bootstrap.servers") + "; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to create websocket consumer, host: " + config.getProperty("bootstrap.servers")
+ "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create websocket consumer, host: %s, %sErrMessage: %s%n",
config.getProperty("bootstrap.servers"),
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: create_consumer
}
@ -67,14 +73,14 @@ public class WsConsumerLoopFull {
System.out.println("data: " + JSON.toJSONString(bean));
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to poll data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
} catch (Exception ex) {
System.out.println("Failed to poll data, ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to poll data", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to poll data, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: poll_data_code_piece
}
@ -98,13 +104,14 @@ public class WsConsumerLoopFull {
consumer.seekToBeginning(assignment);
System.out.println("Assignment seek to beginning successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Seek example failed; ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
} catch (Exception ex) {
System.out.println("Seek example failed; ErrMessage: " + ex.getMessage());
throw new SQLException("seek example failed", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute seek example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: consumer_seek
}
@ -129,13 +136,14 @@ public class WsConsumerLoopFull {
System.out.println("Commit offset manually successfully.");
}
}
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to execute consumer functions. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
} catch (Exception ex) {
System.out.println("Failed to execute consumer functions. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to execute consumer functions", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to execute commit example, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
// ANCHOR_END: commit_code_piece
}
@ -148,13 +156,14 @@ public class WsConsumerLoopFull {
// unsubscribe the consumer
consumer.unsubscribe();
System.out.println("Consumer unsubscribed successfully.");
} catch (SQLException ex) {
// handle any errors, please refer to the JDBC specifications for detailed exceptions info
System.out.println("Failed to unsubscribe consumer. ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
} catch (Exception ex) {
System.out.println("Failed to unsubscribe consumer. ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to unsubscribe consumer", ex);
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to unsubscribe consumer, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
finally {
// close the consumer
@ -236,9 +245,14 @@ public class WsConsumerLoopFull {
i++;
Thread.sleep(1);
}
} catch (SQLException ex) {
System.out.println("Failed to insert data to power.meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to insert data to power.meters", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -248,9 +262,14 @@ public class WsConsumerLoopFull {
statement.executeUpdate("USE power");
statement.executeUpdate("CREATE STABLE IF NOT EXISTS meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))");
statement.executeUpdate("CREATE TOPIC IF NOT EXISTS topic_meters AS SELECT ts, current, voltage, phase, groupid, location FROM meters");
} catch (SQLException ex) {
System.out.println("Failed to create db and table, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
throw new SQLException("Failed to create db and table", ex);
} catch (Exception ex) {
// please refer to the JDBC specifications for detailed exceptions info
System.out.printf("Failed to create db and table, %sErrMessage: %s%n",
ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
ex.getMessage());
// Print stack trace for context in examples. Use logging in production.
ex.printStackTrace();
throw ex;
}
}
@ -309,7 +328,7 @@ public class WsConsumerLoopFull {
try {
prepareData();
} catch (SQLException ex) {
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
System.out.println("Failed to prepare data, ErrCode:" + ex.getErrorCode() + ", ErrMessage: " + ex.getMessage());
return;
} catch (Exception ex) {
System.out.println("Failed to prepare data, ErrMessage: " + ex.getMessage());
@ -334,8 +353,7 @@ public class WsConsumerLoopFull {
consumer.unsubscribe();
unsubscribeExample(consumer);
System.out.println("unsubscribeExample executed successfully.");
System.out.println("unsubscribeExample executed successfully");
} catch (SQLException ex) {
System.out.println("Failed to poll data from topic_meters, ErrCode:" + ex.getErrorCode() + "; ErrMessage: " + ex.getMessage());
return;

48
examples/JDBC/connectionPools/src/main/java/com/taosdata/example/DruidDemo.java
View File

@ -2,35 +2,35 @@ package com.taosdata.example;
import com.alibaba.druid.pool.DruidDataSource;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.Statement;
public class DruidDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
String url = "jdbc:TAOS://127.0.0.1:6030/log";
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
String url = "jdbc:TAOS://127.0.0.1:6030/log";
DruidDataSource dataSource = new DruidDataSource();
// jdbc properties
dataSource.setDriverClassName("com.taosdata.jdbc.TSDBDriver");
dataSource.setUrl(url);
dataSource.setUsername("root");
dataSource.setPassword("taosdata");
// pool configurations
dataSource.setInitialSize(10);
dataSource.setMinIdle(10);
dataSource.setMaxActive(10);
dataSource.setMaxWait(30000);
dataSource.setValidationQuery("SELECT SERVER_VERSION()");
DruidDataSource dataSource = new DruidDataSource();
// jdbc properties
dataSource.setDriverClassName("com.taosdata.jdbc.TSDBDriver");
dataSource.setUrl(url);
dataSource.setUsername("root");
dataSource.setPassword("taosdata");
// pool configurations
dataSource.setInitialSize(10);
dataSource.setMinIdle(10);
dataSource.setMaxActive(10);
dataSource.setMaxWait(30000);
dataSource.setValidationQuery("SELECT SERVER_VERSION()");
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
//query or insert
// ...
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
}
// ANCHOR_END: connection_pool
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}

48
examples/JDBC/connectionPools/src/main/java/com/taosdata/example/HikariDemo.java
View File

@ -4,34 +4,34 @@ import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
public class HikariDemo {
// ANCHOR: connection_pool
public static void main(String[] args) throws SQLException {
HikariConfig config = new HikariConfig();
// jdbc properties
config.setJdbcUrl("jdbc:TAOS://127.0.0.1:6030/log");
config.setUsername("root");
config.setPassword("taosdata");
// connection pool configurations
config.setMinimumIdle(10); //minimum number of idle connection
config.setMaximumPoolSize(10); //maximum number of connection in the pool
config.setConnectionTimeout(30000); //maximum wait milliseconds for get connection from pool
config.setMaxLifetime(0); // maximum life time for each connection
config.setIdleTimeout(0); // max idle time for recycle idle connection
config.setConnectionTestQuery("SELECT SERVER_VERSION()"); //validation query
// ANCHOR: connection_pool
public static void main(String[] args) throws Exception {
HikariConfig config = new HikariConfig();
// jdbc properties
config.setJdbcUrl("jdbc:TAOS://127.0.0.1:6030/log");
config.setUsername("root");
config.setPassword("taosdata");
// connection pool configurations
config.setMinimumIdle(10); // minimum number of idle connection
config.setMaximumPoolSize(10); // maximum number of connection in the pool
config.setConnectionTimeout(30000); // maximum wait milliseconds for get connection from pool
config.setMaxLifetime(0); // maximum life time for each connection
config.setIdleTimeout(0); // max idle time for recycle idle connection
config.setConnectionTestQuery("SELECT SERVER_VERSION()"); // validation query
HikariDataSource ds = new HikariDataSource(config); //create datasource
HikariDataSource dataSource = new HikariDataSource(config); // create datasource
Connection connection = ds.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
Connection connection = dataSource.getConnection(); // get connection
Statement statement = connection.createStatement(); // get statement
//query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
}
// ANCHOR_END: connection_pool
// query or insert
// ...
statement.close();
connection.close(); // put back to connection pool
dataSource.close();
}
// ANCHOR_END: connection_pool
}