Merge branch 'docs/sheyj-3.0' of github.com:taosdata/TDengine into docs/sheyj-3.0
This commit is contained in:
commit
ad0e6ef85e
|
@ -6,6 +6,11 @@ namespace TMQExample
|
|||
{
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internal class SubscribeDemo
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{
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private static string _host = "";
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private static string _groupId = "";
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private static string _clientId = "";
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private static string _topic = "";
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public static void Main(string[] args)
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{
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try
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|
@ -64,9 +69,9 @@ namespace TMQExample
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{
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// ANCHOR: create_consumer
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// consumer config
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var host = "127.0.0.1";
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var groupId = "group1";
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var clientId = "client1";
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_host = "127.0.0.1";
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_groupId = "group1";
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_clientId = "client1";
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var cfg = new Dictionary<string, string>()
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{
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{ "td.connect.port", "6030" },
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|
@ -74,9 +79,9 @@ namespace TMQExample
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{ "msg.with.table.name", "true" },
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{ "enable.auto.commit", "true" },
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{ "auto.commit.interval.ms", "1000" },
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{ "group.id", groupId },
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{ "client.id", clientId },
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{ "td.connect.ip", host },
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{ "group.id", _groupId },
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{ "client.id", _clientId },
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{ "td.connect.ip", _host },
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{ "td.connect.user", "root" },
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{ "td.connect.pass", "taosdata" },
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};
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|
@ -85,20 +90,33 @@ namespace TMQExample
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{
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// create consumer
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consumer = new ConsumerBuilder<Dictionary<string, object>>(cfg).Build();
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Console.WriteLine("Create consumer successfully, host: " + host + ", groupId: " + groupId +
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", clientId: " + clientId);
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Console.WriteLine(
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$"Create consumer successfully, " +
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$"host: {_host}, " +
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$"groupId: {_groupId}, " +
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$"clientId: {_clientId}");
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}
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catch (TDengineError e)
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{
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// handle TDengine error
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Console.WriteLine("Failed to create native consumer, host: " + host + ", ErrCode:" + e.Code +
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", ErrMessage: " + e.Error);
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Console.WriteLine(
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$"Failed to create native consumer, " +
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$"host: {_host}, " +
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$"groupId: {_groupId}, " +
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$"clientId: {_clientId}, " +
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$"ErrCode: {e.Code}, " +
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$"ErrMessage: {e.Error}");
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throw;
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}
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catch (Exception e)
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||||
{
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// handle other exceptions
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Console.WriteLine("Failed to create native consumer, host: " + host + ", ErrMessage: " + e.Message);
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Console.WriteLine(
|
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$"Failed to create native consumer, " +
|
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$"host: {_host}, " +
|
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$"groupId: {_groupId}, " +
|
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$"clientId: {_clientId}, " +
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$"ErrMessage: {e.Message}");
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throw;
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}
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|
@ -109,11 +127,12 @@ namespace TMQExample
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static void Consume(IConsumer<Dictionary<string, object>> consumer)
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{
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// ANCHOR: subscribe
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_topic = "topic_meters";
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try
|
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{
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// subscribe
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consumer.Subscribe(new List<string>() { "topic_meters" });
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Console.WriteLine("subscribe topics successfully");
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consumer.Subscribe(new List<string>() { _topic });
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Console.WriteLine("Subscribe topics successfully");
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for (int i = 0; i < 50; i++)
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{
|
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// consume message with using block to ensure the result is disposed
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|
@ -133,13 +152,24 @@ namespace TMQExample
|
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catch (TDengineError e)
|
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{
|
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// handle TDengine error
|
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Console.WriteLine("Failed to poll data, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
|
||||
Console.WriteLine(
|
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$"Failed to poll data, " +
|
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$"topic: {_topic}, " +
|
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$"groupId: {_groupId}, " +
|
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$"clientId: {_clientId}, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
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throw;
|
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}
|
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catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to poll data, ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
$"Failed to poll data, " +
|
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$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
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$"ErrMessage: {e.Message}");
|
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throw;
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}
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// ANCHOR_END: subscribe
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|
@ -152,24 +182,38 @@ namespace TMQExample
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{
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// get assignment
|
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var assignment = consumer.Assignment;
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Console.WriteLine($"now assignment: {assignment}");
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Console.WriteLine($"Now assignment: {assignment}");
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// seek to the beginning
|
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foreach (var topicPartition in assignment)
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{
|
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consumer.Seek(new TopicPartitionOffset(topicPartition.Topic, topicPartition.Partition, 0));
|
||||
}
|
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|
||||
Console.WriteLine("Assignment seek to beginning successfully");
|
||||
}
|
||||
catch (TDengineError e)
|
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{
|
||||
// handle TDengine error
|
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Console.WriteLine("Failed to execute seek example, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
|
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Console.WriteLine(
|
||||
$"Failed to seek offset, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
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$"offset: 0, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to execute seek example, ErrMessage: " + e.Message);
|
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Console.WriteLine(
|
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$"Failed to seek offset, " +
|
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$"topic: {_topic}, " +
|
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$"groupId: {_groupId}, " +
|
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$"clientId: {_clientId}, " +
|
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$"offset: 0, " +
|
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$"ErrMessage: {e.Message}");
|
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throw;
|
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}
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// ANCHOR_END: seek
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|
@ -180,6 +224,7 @@ namespace TMQExample
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// ANCHOR: commit_offset
|
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for (int i = 0; i < 5; i++)
|
||||
{
|
||||
TopicPartitionOffset topicPartitionOffset = null;
|
||||
try
|
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{
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// consume message with using block to ensure the result is disposed
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|
@ -187,9 +232,10 @@ namespace TMQExample
|
|||
{
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||||
if (cr == null) continue;
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// commit offset
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||||
topicPartitionOffset = cr.TopicPartitionOffset;
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consumer.Commit(new List<TopicPartitionOffset>
|
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{
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cr.TopicPartitionOffset,
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||||
topicPartitionOffset,
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});
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Console.WriteLine("Commit offset manually successfully.");
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}
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|
@ -197,13 +243,26 @@ namespace TMQExample
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catch (TDengineError e)
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{
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// handle TDengine error
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Console.WriteLine("Failed to execute commit example, ErrCode:" + e.Code + ", ErrMessage: " + e.Error);
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||||
Console.WriteLine(
|
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$"Failed to commit offset, " +
|
||||
$"topic: {_topic}, " +
|
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$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"offset: {topicPartitionOffset}, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
||||
throw;
|
||||
}
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||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to execute commit example, ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
$"Failed to commit offset, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"offset: {topicPartitionOffset}, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
}
|
||||
|
@ -221,13 +280,24 @@ 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, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to unsubscribe consumer, ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
$"Failed to execute commit example, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
finally
|
||||
|
@ -239,4 +309,4 @@ namespace TMQExample
|
|||
// ANCHOR_END: close
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
|
@ -16,10 +16,10 @@ namespace Examples
|
|||
var builder = new ConnectionStringBuilder(connectionString);
|
||||
using (var client = DbDriver.Open(builder))
|
||||
{
|
||||
CreateDatabaseAndTable(client,connectionString);
|
||||
InsertData(client,connectionString);
|
||||
QueryData(client,connectionString);
|
||||
QueryWithReqId(client,connectionString);
|
||||
CreateDatabaseAndTable(client, connectionString);
|
||||
InsertData(client, connectionString);
|
||||
QueryData(client, connectionString);
|
||||
QueryWithReqId(client, connectionString);
|
||||
}
|
||||
}
|
||||
catch (TDengineError e)
|
||||
|
@ -52,7 +52,8 @@ namespace Examples
|
|||
catch (TDengineError e)
|
||||
{
|
||||
// handle TDengine error
|
||||
Console.WriteLine("Failed to create database power or stable meters, 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)
|
||||
|
@ -64,40 +65,43 @@ namespace Examples
|
|||
// ANCHOR_END: create_db_and_table
|
||||
}
|
||||
|
||||
private static void InsertData(ITDengineClient client,string connectionString)
|
||||
private static void InsertData(ITDengineClient client, string connectionString)
|
||||
{
|
||||
// ANCHOR: insert_data
|
||||
// insert data, please make sure the database and table are created before
|
||||
var 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) ";
|
||||
try
|
||||
{
|
||||
// insert data, please make sure the database and table are created before
|
||||
var 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) ";
|
||||
var affectedRows = client.Exec(insertQuery);
|
||||
Console.WriteLine("Successfully inserted " + affectedRows + " rows to power.meters.");
|
||||
}
|
||||
catch (TDengineError e)
|
||||
{
|
||||
// handle TDengine error
|
||||
Console.WriteLine("Failed to insert data to power.meters, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
|
||||
Console.WriteLine("Failed to insert data to power.meters, sql: " + insertQuery + ", ErrCode: " +
|
||||
e.Code + ", ErrMessage: " +
|
||||
e.Error);
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to insert data to power.meters, ErrMessage: " + e.Message);
|
||||
Console.WriteLine("Failed to insert data to power.meters, sql: " + insertQuery + ", ErrMessage: " +
|
||||
e.Message);
|
||||
throw;
|
||||
}
|
||||
// ANCHOR_END: insert_data
|
||||
}
|
||||
|
||||
private static void QueryData(ITDengineClient client,string connectionString)
|
||||
private static void QueryData(ITDengineClient client, string connectionString)
|
||||
{
|
||||
// ANCHOR: select_data
|
||||
// query data, make sure the database and table are created before
|
||||
|
@ -108,6 +112,7 @@ namespace Examples
|
|||
{
|
||||
while (rows.Read())
|
||||
{
|
||||
// Add your data processing logic here
|
||||
var ts = (DateTime)rows.GetValue(0);
|
||||
var current = (float)rows.GetValue(1);
|
||||
var location = Encoding.UTF8.GetString((byte[])rows.GetValue(2));
|
||||
|
@ -119,28 +124,30 @@ namespace Examples
|
|||
catch (TDengineError e)
|
||||
{
|
||||
// handle TDengine error
|
||||
Console.WriteLine("Failed to query data from power.meters, sql: " + query + ", 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, sql: " + query + ", ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
"Failed to query data from power.meters, sql: " + query + ", ErrMessage: " + e.Message);
|
||||
throw;
|
||||
}
|
||||
// ANCHOR_END: select_data
|
||||
}
|
||||
|
||||
private static void QueryWithReqId(ITDengineClient client,string connectionString)
|
||||
private static void QueryWithReqId(ITDengineClient client, string connectionString)
|
||||
{
|
||||
// ANCHOR: query_id
|
||||
var reqId = (long)3;
|
||||
// query data
|
||||
var query = "SELECT ts, current, location FROM power.meters limit 1";
|
||||
try
|
||||
{
|
||||
// query data
|
||||
var query = "SELECT ts, current, location FROM power.meters limit 1";
|
||||
// query with request id 3
|
||||
using (var rows = client.Query(query,reqId))
|
||||
using (var rows = client.Query(query, reqId))
|
||||
{
|
||||
while (rows.Read())
|
||||
{
|
||||
|
@ -155,16 +162,18 @@ namespace Examples
|
|||
catch (TDengineError e)
|
||||
{
|
||||
// handle TDengine error
|
||||
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
|
||||
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", sql: " + query + ", ErrCode: " +
|
||||
e.Code + ", ErrMessage: " + e.Error);
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", ErrMessage: " + e.Message);
|
||||
Console.WriteLine("Failed to execute sql with reqId: " + reqId + ", sql: " + query + ", ErrMessage: " +
|
||||
e.Message);
|
||||
throw;
|
||||
}
|
||||
// ANCHOR_END: query_id
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
|
@ -6,6 +6,11 @@ namespace TMQExample
|
|||
{
|
||||
internal class SubscribeDemo
|
||||
{
|
||||
private static string _host = "";
|
||||
private static string _groupId = "";
|
||||
private static string _clientId = "";
|
||||
private static string _topic = "";
|
||||
|
||||
public static void Main(string[] args)
|
||||
{
|
||||
try
|
||||
|
@ -68,9 +73,9 @@ namespace TMQExample
|
|||
{
|
||||
// ANCHOR: create_consumer
|
||||
// consumer config
|
||||
var host = "127.0.0.1";
|
||||
var groupId = "group1";
|
||||
var clientId = "client1";
|
||||
_host = "127.0.0.1";
|
||||
_groupId = "group1";
|
||||
_clientId = "client1";
|
||||
var cfg = new Dictionary<string, string>()
|
||||
{
|
||||
{ "td.connect.type", "WebSocket" },
|
||||
|
@ -79,9 +84,9 @@ namespace TMQExample
|
|||
{ "msg.with.table.name", "true" },
|
||||
{ "enable.auto.commit", "true" },
|
||||
{ "auto.commit.interval.ms", "1000" },
|
||||
{ "group.id", groupId },
|
||||
{ "client.id", clientId },
|
||||
{ "td.connect.ip", host },
|
||||
{ "group.id", _groupId },
|
||||
{ "client.id", _clientId },
|
||||
{ "td.connect.ip", _host },
|
||||
{ "td.connect.user", "root" },
|
||||
{ "td.connect.pass", "taosdata" },
|
||||
};
|
||||
|
@ -90,20 +95,33 @@ namespace TMQExample
|
|||
{
|
||||
// create consumer
|
||||
consumer = new ConsumerBuilder<Dictionary<string, object>>(cfg).Build();
|
||||
Console.WriteLine("Create consumer successfully, host: " + host + ", groupId: " + groupId +
|
||||
", clientId: " + clientId);
|
||||
Console.WriteLine(
|
||||
$"Create consumer successfully, " +
|
||||
$"host: {_host}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}");
|
||||
}
|
||||
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 native consumer, " +
|
||||
$"host: {_host}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"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 native consumer, " +
|
||||
$"host: {_host}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
|
||||
|
@ -114,10 +132,11 @@ namespace TMQExample
|
|||
static void Consume(IConsumer<Dictionary<string, object>> consumer)
|
||||
{
|
||||
// ANCHOR: subscribe
|
||||
_topic = "topic_meters";
|
||||
try
|
||||
{
|
||||
// subscribe
|
||||
consumer.Subscribe(new List<string>() { "topic_meters" });
|
||||
consumer.Subscribe(new List<string>() { _topic });
|
||||
Console.WriteLine("Subscribe topics successfully");
|
||||
for (int i = 0; i < 50; i++)
|
||||
{
|
||||
|
@ -138,13 +157,23 @@ 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, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"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, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
// ANCHOR_END: subscribe
|
||||
|
@ -163,18 +192,32 @@ namespace TMQExample
|
|||
{
|
||||
consumer.Seek(new TopicPartitionOffset(topicPartition.Topic, topicPartition.Partition, 0));
|
||||
}
|
||||
|
||||
Console.WriteLine("Assignment seek to beginning successfully");
|
||||
}
|
||||
catch (TDengineError e)
|
||||
{
|
||||
// handle TDengine error
|
||||
Console.WriteLine("Failed to execute seek example, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
|
||||
Console.WriteLine(
|
||||
$"Failed to seek offset, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"offset: 0, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to execute seek example, ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
$"Failed to seek offset, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"offset: 0, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
// ANCHOR_END: seek
|
||||
|
@ -185,6 +228,7 @@ namespace TMQExample
|
|||
// ANCHOR: commit_offset
|
||||
for (int i = 0; i < 5; i++)
|
||||
{
|
||||
TopicPartitionOffset topicPartitionOffset = null;
|
||||
try
|
||||
{
|
||||
// consume message with using block to ensure the result is disposed
|
||||
|
@ -192,9 +236,10 @@ namespace TMQExample
|
|||
{
|
||||
if (cr == null) continue;
|
||||
// commit offset
|
||||
topicPartitionOffset = cr.TopicPartitionOffset;
|
||||
consumer.Commit(new List<TopicPartitionOffset>
|
||||
{
|
||||
cr.TopicPartitionOffset,
|
||||
topicPartitionOffset,
|
||||
});
|
||||
Console.WriteLine("Commit offset manually successfully.");
|
||||
}
|
||||
|
@ -202,13 +247,26 @@ namespace TMQExample
|
|||
catch (TDengineError e)
|
||||
{
|
||||
// handle TDengine error
|
||||
Console.WriteLine("Failed to execute commit example, ErrCode: " + e.Code + ", ErrMessage: " + e.Error);
|
||||
Console.WriteLine(
|
||||
$"Failed to commit offset, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"offset: {topicPartitionOffset}, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to execute commit example, ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
$"Failed to commit offset, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"offset: {topicPartitionOffset}, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
}
|
||||
|
@ -226,13 +284,24 @@ 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, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"ErrCode: {e.Code}, " +
|
||||
$"ErrMessage: {e.Error}");
|
||||
throw;
|
||||
}
|
||||
catch (Exception e)
|
||||
{
|
||||
// handle other exceptions
|
||||
Console.WriteLine("Failed to unsubscribe consumer, ErrMessage: " + e.Message);
|
||||
Console.WriteLine(
|
||||
$"Failed to execute commit example, " +
|
||||
$"topic: {_topic}, " +
|
||||
$"groupId: {_groupId}, " +
|
||||
$"clientId: {_clientId}, " +
|
||||
$"ErrMessage: {e.Message}");
|
||||
throw;
|
||||
}
|
||||
finally
|
||||
|
@ -244,4 +313,4 @@ namespace TMQExample
|
|||
// ANCHOR_END: close
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
|
@ -1,58 +1,60 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
_ "github.com/taosdata/driver-go/v3/taosSql"
|
||||
)
|
||||
|
||||
func main() {
|
||||
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())
|
||||
}
|
||||
defer db.Close()
|
||||
initEnv(db)
|
||||
// ANCHOR: query_id
|
||||
// use context to set request id
|
||||
reqId := int64(3)
|
||||
ctx := context.WithValue(context.Background(), "taos_req_id", reqId)
|
||||
// execute query with context
|
||||
rows, err := db.QueryContext(ctx, "SELECT ts, current, location FROM power.meters limit 1")
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to execute sql with reqId: %d, url: %s; ErrMessage: %s\n", reqId, taosDSN, err.Error())
|
||||
}
|
||||
for rows.Next() {
|
||||
var (
|
||||
ts time.Time
|
||||
current float32
|
||||
location string
|
||||
)
|
||||
err = rows.Scan(&ts, ¤t, &location)
|
||||
if err != nil {
|
||||
log.Fatal("Scan error: ", err)
|
||||
}
|
||||
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
|
||||
}
|
||||
// ANCHOR_END: query_id
|
||||
}
|
||||
|
||||
func initEnv(conn *sql.DB) {
|
||||
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
|
||||
if err != nil {
|
||||
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 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 to power.meters error: ", err)
|
||||
}
|
||||
}
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
_ "github.com/taosdata/driver-go/v3/taosSql"
|
||||
)
|
||||
|
||||
func main() {
|
||||
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())
|
||||
}
|
||||
defer db.Close()
|
||||
initEnv(db)
|
||||
// ANCHOR: query_id
|
||||
// use context to set request id
|
||||
reqId := int64(3)
|
||||
ctx := context.WithValue(context.Background(), "taos_req_id", reqId)
|
||||
// execute query with context
|
||||
querySql := "SELECT ts, current, location FROM power.meters limit 1"
|
||||
rows, err := db.QueryContext(ctx, querySql)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to execute sql with reqId: %d, url: %s, sql: %s, ErrMessage: %s\n", reqId, taosDSN, querySql, err.Error())
|
||||
}
|
||||
for rows.Next() {
|
||||
// Add your data processing logic here
|
||||
var (
|
||||
ts time.Time
|
||||
current float32
|
||||
location string
|
||||
)
|
||||
err = rows.Scan(&ts, ¤t, &location)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to scan data, reqId: %d, url:%s, sql: %s, ErrMessage: %s\n", reqId, taosDSN, querySql, err)
|
||||
}
|
||||
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
|
||||
}
|
||||
// ANCHOR_END: query_id
|
||||
}
|
||||
|
||||
func initEnv(conn *sql.DB) {
|
||||
_, err := conn.Exec("CREATE DATABASE IF NOT EXISTS power")
|
||||
if err != nil {
|
||||
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 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 to power.meters error: ", err)
|
||||
}
|
||||
}
|
||||
|
|
|
@ -1,86 +1,86 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
_ "github.com/taosdata/driver-go/v3/taosSql"
|
||||
)
|
||||
|
||||
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())
|
||||
}
|
||||
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 database power, ErrMessage: " + err.Error())
|
||||
}
|
||||
rowsAffected, err := res.RowsAffected()
|
||||
if err != nil {
|
||||
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 stable meters, ErrMessage: " + err.Error())
|
||||
}
|
||||
rowsAffected, err = res.RowsAffected()
|
||||
if err != nil {
|
||||
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)
|
||||
// ANCHOR_END: create_db_and_table
|
||||
// ANCHOR: insert_data
|
||||
// insert data, please make sure the database and table are created before
|
||||
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) "
|
||||
res, err = db.Exec(insertQuery)
|
||||
if err != nil {
|
||||
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, 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
|
||||
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, ErrMessage: " + err.Error())
|
||||
}
|
||||
for rows.Next() {
|
||||
var (
|
||||
ts time.Time
|
||||
current float32
|
||||
location string
|
||||
)
|
||||
err = rows.Scan(&ts, ¤t, &location)
|
||||
if err != nil {
|
||||
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)
|
||||
}
|
||||
// ANCHOR_END: select_data
|
||||
}
|
||||
package main
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
_ "github.com/taosdata/driver-go/v3/taosSql"
|
||||
)
|
||||
|
||||
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())
|
||||
}
|
||||
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 database power, ErrMessage: " + err.Error())
|
||||
}
|
||||
rowsAffected, err := res.RowsAffected()
|
||||
if err != nil {
|
||||
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 stable meters, ErrMessage: " + err.Error())
|
||||
}
|
||||
rowsAffected, err = res.RowsAffected()
|
||||
if err != nil {
|
||||
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)
|
||||
// ANCHOR_END: create_db_and_table
|
||||
// ANCHOR: insert_data
|
||||
// insert data, please make sure the database and table are created before
|
||||
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) "
|
||||
res, err = db.Exec(insertQuery)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to insert data to power.meters, sql: %s, ErrMessage: %s\n", insertQuery, err.Error())
|
||||
}
|
||||
rowsAffected, err = res.RowsAffected()
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to get insert rowsAffected, sql: %s, ErrMessage: %s\n", insertQuery, 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
|
||||
sql := "SELECT ts, current, location FROM power.meters limit 100"
|
||||
rows, err := db.Query(sql)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to query data from power.meters, sql: %s, ErrMessage: %s\n", sql, err.Error())
|
||||
}
|
||||
for rows.Next() {
|
||||
// Add your data processing logic here
|
||||
var (
|
||||
ts time.Time
|
||||
current float32
|
||||
location string
|
||||
)
|
||||
err = rows.Scan(&ts, ¤t, &location)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to scan data, sql: %s, ErrMessage: %s\n", sql, err)
|
||||
}
|
||||
fmt.Printf("ts: %s, current: %f, location: %s\n", ts, current, location)
|
||||
}
|
||||
// ANCHOR_END: select_data
|
||||
}
|
||||
|
|
|
@ -1,136 +1,179 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/taosdata/driver-go/v3/af/tmq"
|
||||
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
|
||||
_ "github.com/taosdata/driver-go/v3/taosSql"
|
||||
)
|
||||
|
||||
var done = make(chan struct{})
|
||||
|
||||
func main() {
|
||||
// init env
|
||||
taosDSN := "root:taosdata@tcp(127.0.0.1:6030)/"
|
||||
conn, err := sql.Open("taosSql", taosDSN)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
|
||||
}
|
||||
defer func() {
|
||||
conn.Close()
|
||||
}()
|
||||
initEnv(conn)
|
||||
// ANCHOR: create_consumer
|
||||
// create consumer
|
||||
groupID := "group1"
|
||||
clientID := "client1"
|
||||
host := "127.0.0.1"
|
||||
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
|
||||
"td.connect.user": "root",
|
||||
"td.connect.pass": "taosdata",
|
||||
"auto.offset.reset": "latest",
|
||||
"msg.with.table.name": "true",
|
||||
"enable.auto.commit": "true",
|
||||
"auto.commit.interval.ms": "1000",
|
||||
"group.id": groupID,
|
||||
"client.id": clientID,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to create native consumer, host : " + host + "; ErrMessage: " + err.Error())
|
||||
}
|
||||
log.Println("Create consumer successfully, host: " + host + ", groupId: " + groupID + ", clientId: " + clientID)
|
||||
|
||||
// ANCHOR_END: create_consumer
|
||||
// ANCHOR: subscribe
|
||||
err = consumer.Subscribe("topic_meters", nil)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to subscribe topic_meters, ErrMessage: " + err.Error())
|
||||
}
|
||||
log.Println("Subscribe topics successfully")
|
||||
for i := 0; i < 50; i++ {
|
||||
ev := consumer.Poll(100)
|
||||
if ev != nil {
|
||||
switch e := ev.(type) {
|
||||
case *tmqcommon.DataMessage:
|
||||
// process your data here
|
||||
fmt.Printf("data:%v\n", e)
|
||||
// ANCHOR: commit_offset
|
||||
// commit offset
|
||||
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
|
||||
if err != nil {
|
||||
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, ErrMessage: " + err.Error())
|
||||
}
|
||||
}
|
||||
}
|
||||
// ANCHOR_END: subscribe
|
||||
// ANCHOR: seek
|
||||
// get assignment
|
||||
partitions, err := consumer.Assignment()
|
||||
if err != nil {
|
||||
log.Fatal("Failed to get assignment, ErrMessage: " + err.Error())
|
||||
}
|
||||
fmt.Println("Now assignment:", partitions)
|
||||
for i := 0; i < len(partitions); i++ {
|
||||
// seek to the beginning
|
||||
err = consumer.Seek(tmqcommon.TopicPartition{
|
||||
Topic: partitions[i].Topic,
|
||||
Partition: partitions[i].Partition,
|
||||
Offset: 0,
|
||||
}, 0)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to execute seek example, ErrMessage: " + err.Error())
|
||||
}
|
||||
}
|
||||
fmt.Println("Assignment seek to beginning successfully")
|
||||
// ANCHOR_END: seek
|
||||
// ANCHOR: close
|
||||
// unsubscribe
|
||||
err = consumer.Unsubscribe()
|
||||
if err != nil {
|
||||
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())
|
||||
}
|
||||
fmt.Println("Consumer closed successfully.")
|
||||
// ANCHOR_END: close
|
||||
<-done
|
||||
}
|
||||
|
||||
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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
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())
|
||||
}
|
||||
}
|
||||
done <- struct{}{}
|
||||
}()
|
||||
}
|
||||
package main
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/taosdata/driver-go/v3/af/tmq"
|
||||
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
|
||||
_ "github.com/taosdata/driver-go/v3/taosSql"
|
||||
)
|
||||
|
||||
var done = make(chan struct{})
|
||||
var groupID string
|
||||
var clientID string
|
||||
var host string
|
||||
var topic string
|
||||
|
||||
func main() {
|
||||
// init env
|
||||
taosDSN := "root:taosdata@tcp(127.0.0.1:6030)/"
|
||||
conn, err := sql.Open("taosSql", taosDSN)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
|
||||
}
|
||||
defer func() {
|
||||
conn.Close()
|
||||
}()
|
||||
initEnv(conn)
|
||||
// ANCHOR: create_consumer
|
||||
// create consumer
|
||||
groupID = "group1"
|
||||
clientID = "client1"
|
||||
host = "127.0.0.1"
|
||||
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
|
||||
"td.connect.user": "root",
|
||||
"td.connect.pass": "taosdata",
|
||||
"auto.offset.reset": "latest",
|
||||
"msg.with.table.name": "true",
|
||||
"enable.auto.commit": "true",
|
||||
"auto.commit.interval.ms": "1000",
|
||||
"group.id": groupID,
|
||||
"client.id": clientID,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to create native consumer, host: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
host,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
log.Printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s\n", host, groupID, clientID)
|
||||
|
||||
// ANCHOR_END: create_consumer
|
||||
// ANCHOR: subscribe
|
||||
topic = "topic_meters"
|
||||
err = consumer.Subscribe(topic, nil)
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to subscribe topic_meters, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
log.Println("Subscribe topics successfully")
|
||||
for i := 0; i < 50; i++ {
|
||||
ev := consumer.Poll(100)
|
||||
if ev != nil {
|
||||
switch e := ev.(type) {
|
||||
case *tmqcommon.DataMessage:
|
||||
// process your data here
|
||||
fmt.Printf("data:%v\n", e)
|
||||
// ANCHOR: commit_offset
|
||||
// commit offset
|
||||
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to commit offset, topic: %s, groupId: %s, clientId: %s, offset %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
e.TopicPartition,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
log.Println("Commit offset manually successfully.")
|
||||
// ANCHOR_END: commit_offset
|
||||
case tmqcommon.Error:
|
||||
log.Fatalf("Failed to poll data, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n", topic, groupID, clientID, e.Error())
|
||||
}
|
||||
}
|
||||
}
|
||||
// ANCHOR_END: subscribe
|
||||
// ANCHOR: seek
|
||||
// get assignment
|
||||
partitions, err := consumer.Assignment()
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to get assignment, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n", topic, groupID, clientID, err.Error())
|
||||
}
|
||||
fmt.Println("Now assignment:", partitions)
|
||||
for i := 0; i < len(partitions); i++ {
|
||||
// seek to the beginning
|
||||
err = consumer.Seek(tmqcommon.TopicPartition{
|
||||
Topic: partitions[i].Topic,
|
||||
Partition: partitions[i].Partition,
|
||||
Offset: 0,
|
||||
}, 0)
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to execute seek offset, topic: %s, groupId: %s, clientId: %s, partition: %d, offset: %d, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
partitions[i].Partition,
|
||||
0,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
}
|
||||
fmt.Println("Assignment seek to beginning successfully")
|
||||
// ANCHOR_END: seek
|
||||
// ANCHOR: close
|
||||
// unsubscribe
|
||||
err = consumer.Unsubscribe()
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
fmt.Println("Consumer unsubscribed successfully.")
|
||||
// close consumer
|
||||
err = consumer.Close()
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to close consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
fmt.Println("Consumer closed successfully.")
|
||||
// ANCHOR_END: close
|
||||
<-done
|
||||
}
|
||||
|
||||
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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
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())
|
||||
}
|
||||
}
|
||||
done <- struct{}{}
|
||||
}()
|
||||
}
|
||||
|
|
|
@ -1,141 +1,197 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/taosdata/driver-go/v3/common"
|
||||
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
|
||||
_ "github.com/taosdata/driver-go/v3/taosWS"
|
||||
"github.com/taosdata/driver-go/v3/ws/tmq"
|
||||
)
|
||||
|
||||
var done = make(chan struct{})
|
||||
|
||||
func main() {
|
||||
// init env
|
||||
taosDSN := "root:taosdata@ws(127.0.0.1:6041)/"
|
||||
conn, err := sql.Open("taosWS", taosDSN)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to connect to " + taosDSN + "; ErrMessage: " + err.Error())
|
||||
}
|
||||
defer func() {
|
||||
conn.Close()
|
||||
}()
|
||||
initEnv(conn)
|
||||
// ANCHOR: create_consumer
|
||||
// create consumer
|
||||
wsUrl := "ws://127.0.0.1:6041"
|
||||
groupID := "group1"
|
||||
clientID := "client1"
|
||||
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
|
||||
"ws.url": wsUrl,
|
||||
"ws.message.channelLen": uint(0),
|
||||
"ws.message.timeout": common.DefaultMessageTimeout,
|
||||
"ws.message.writeWait": common.DefaultWriteWait,
|
||||
"td.connect.user": "root",
|
||||
"td.connect.pass": "taosdata",
|
||||
"auto.offset.reset": "latest",
|
||||
"msg.with.table.name": "true",
|
||||
"enable.auto.commit": "true",
|
||||
"auto.commit.interval.ms": "1000",
|
||||
"group.id": groupID,
|
||||
"client.id": clientID,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to create websocket consumer, host : " + wsUrl + "; ErrMessage: " + err.Error())
|
||||
}
|
||||
log.Println("Create consumer successfully, host: " + wsUrl + ", groupId: " + groupID + ", clientId: " + clientID)
|
||||
|
||||
// ANCHOR_END: create_consumer
|
||||
// ANCHOR: subscribe
|
||||
err = consumer.Subscribe("topic_meters", nil)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to subscribe topic_meters, ErrMessage: " + err.Error())
|
||||
}
|
||||
log.Println("Subscribe topics successfully")
|
||||
for i := 0; i < 50; i++ {
|
||||
ev := consumer.Poll(100)
|
||||
if ev != nil {
|
||||
switch e := ev.(type) {
|
||||
case *tmqcommon.DataMessage:
|
||||
// process your data here
|
||||
fmt.Printf("data:%v\n", e)
|
||||
// ANCHOR: commit_offset
|
||||
// commit offset
|
||||
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
|
||||
if err != nil {
|
||||
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, ErrMessage: " + err.Error())
|
||||
}
|
||||
}
|
||||
}
|
||||
// ANCHOR_END: subscribe
|
||||
// ANCHOR: seek
|
||||
// get assignment
|
||||
partitions, err := consumer.Assignment()
|
||||
if err != nil {
|
||||
log.Fatal("Failed to get assignment, ErrMessage: " + err.Error())
|
||||
}
|
||||
fmt.Println("Now assignment:", partitions)
|
||||
for i := 0; i < len(partitions); i++ {
|
||||
// seek to the beginning
|
||||
err = consumer.Seek(tmqcommon.TopicPartition{
|
||||
Topic: partitions[i].Topic,
|
||||
Partition: partitions[i].Partition,
|
||||
Offset: 0,
|
||||
}, 0)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to execute seek example, ErrMessage: " + err.Error())
|
||||
}
|
||||
}
|
||||
fmt.Println("Assignment seek to beginning successfully")
|
||||
// ANCHOR_END: seek
|
||||
// ANCHOR: close
|
||||
// unsubscribe
|
||||
err = consumer.Unsubscribe()
|
||||
if err != nil {
|
||||
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())
|
||||
}
|
||||
fmt.Println("Consumer closed successfully.")
|
||||
// ANCHOR_END: close
|
||||
<-done
|
||||
}
|
||||
|
||||
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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
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())
|
||||
}
|
||||
}
|
||||
done <- struct{}{}
|
||||
}()
|
||||
}
|
||||
package main
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"fmt"
|
||||
"log"
|
||||
"time"
|
||||
|
||||
"github.com/taosdata/driver-go/v3/common"
|
||||
tmqcommon "github.com/taosdata/driver-go/v3/common/tmq"
|
||||
_ "github.com/taosdata/driver-go/v3/taosWS"
|
||||
"github.com/taosdata/driver-go/v3/ws/tmq"
|
||||
)
|
||||
|
||||
var done = make(chan struct{})
|
||||
var groupID string
|
||||
var clientID string
|
||||
var host string
|
||||
var topic string
|
||||
|
||||
func main() {
|
||||
// init env
|
||||
taosDSN := "root:taosdata@ws(127.0.0.1:6041)/"
|
||||
conn, err := sql.Open("taosWS", taosDSN)
|
||||
if err != nil {
|
||||
log.Fatalln("Failed to connect to " + taosDSN + ", ErrMessage: " + err.Error())
|
||||
}
|
||||
defer func() {
|
||||
conn.Close()
|
||||
}()
|
||||
initEnv(conn)
|
||||
// ANCHOR: create_consumer
|
||||
// create consumer
|
||||
wsUrl := "ws://127.0.0.1:6041"
|
||||
groupID = "group1"
|
||||
clientID = "client1"
|
||||
host = "127.0.0.1"
|
||||
consumer, err := tmq.NewConsumer(&tmqcommon.ConfigMap{
|
||||
"ws.url": wsUrl,
|
||||
"ws.message.channelLen": uint(0),
|
||||
"ws.message.timeout": common.DefaultMessageTimeout,
|
||||
"ws.message.writeWait": common.DefaultWriteWait,
|
||||
"td.connect.user": "root",
|
||||
"td.connect.pass": "taosdata",
|
||||
"auto.offset.reset": "latest",
|
||||
"msg.with.table.name": "true",
|
||||
"enable.auto.commit": "true",
|
||||
"auto.commit.interval.ms": "1000",
|
||||
"group.id": groupID,
|
||||
"client.id": clientID,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to create websocket consumer, host: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
host,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
log.Printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s\n", host, groupID, clientID)
|
||||
|
||||
// ANCHOR_END: create_consumer
|
||||
// ANCHOR: subscribe
|
||||
topic = "topic_meters"
|
||||
err = consumer.Subscribe(topic, nil)
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to subscribe topic_meters, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
log.Println("Subscribe topics successfully")
|
||||
for i := 0; i < 50; i++ {
|
||||
ev := consumer.Poll(100)
|
||||
if ev != nil {
|
||||
switch e := ev.(type) {
|
||||
case *tmqcommon.DataMessage:
|
||||
// process your data here
|
||||
fmt.Printf("data:%v\n", e)
|
||||
// ANCHOR: commit_offset
|
||||
// commit offset
|
||||
_, err = consumer.CommitOffsets([]tmqcommon.TopicPartition{e.TopicPartition})
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to commit offset, topic: %s, groupId: %s, clientId: %s, offset %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
e.TopicPartition,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
log.Println("Commit offset manually successfully.")
|
||||
// ANCHOR_END: commit_offset
|
||||
case tmqcommon.Error:
|
||||
log.Fatalf(
|
||||
"Failed to poll data, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
e.Error(),
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
// ANCHOR_END: subscribe
|
||||
// ANCHOR: seek
|
||||
// get assignment
|
||||
partitions, err := consumer.Assignment()
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to get assignment, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
fmt.Println("Now assignment:", partitions)
|
||||
for i := 0; i < len(partitions); i++ {
|
||||
// seek to the beginning
|
||||
err = consumer.Seek(tmqcommon.TopicPartition{
|
||||
Topic: partitions[i].Topic,
|
||||
Partition: partitions[i].Partition,
|
||||
Offset: 0,
|
||||
}, 0)
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to seek offset, topic: %s, groupId: %s, clientId: %s, partition: %d, offset: %d, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
partitions[i].Partition,
|
||||
0,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
}
|
||||
fmt.Println("Assignment seek to beginning successfully")
|
||||
// ANCHOR_END: seek
|
||||
// ANCHOR: close
|
||||
// unsubscribe
|
||||
err = consumer.Unsubscribe()
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
fmt.Println("Consumer unsubscribed successfully.")
|
||||
// close consumer
|
||||
err = consumer.Close()
|
||||
if err != nil {
|
||||
log.Fatalf(
|
||||
"Failed to close consumer, topic: %s, groupId: %s, clientId: %s, ErrMessage: %s\n",
|
||||
topic,
|
||||
groupID,
|
||||
clientID,
|
||||
err.Error(),
|
||||
)
|
||||
}
|
||||
fmt.Println("Consumer closed successfully.")
|
||||
// ANCHOR_END: close
|
||||
<-done
|
||||
}
|
||||
|
||||
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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
_, 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())
|
||||
}
|
||||
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())
|
||||
}
|
||||
}
|
||||
done <- struct{}{}
|
||||
}()
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue