update java sample code
This commit is contained in:
sheyanjie-qq
parent
85e6492ac4
commit
3d9380b51a
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@ -19,8 +19,10 @@ public class ConsumerLoopFull {
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static private Connection connection;
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static private Statement statement;
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static private volatile boolean stopThread = false;
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static private String groupId = "group1";
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static private String clientId = "clinet1";
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public static TaosConsumer<ResultBean> getConsumer() throws Exception {
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public static TaosConsumer<ResultBean> getConsumer() throws Exception {
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// ANCHOR: create_consumer
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Properties config = new Properties();
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config.setProperty("td.connect.type", "jni");
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@ -30,7 +32,7 @@ public class ConsumerLoopFull {
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config.setProperty("enable.auto.commit", "true");
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config.setProperty("auto.commit.interval.ms", "1000");
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config.setProperty("group.id", "group1");
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config.setProperty("client.id", "1");
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config.setProperty("client.id", "clinet1");
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config.setProperty("td.connect.user", "root");
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config.setProperty("td.connect.pass", "taosdata");
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config.setProperty("value.deserializer", "com.taos.example.ConsumerLoopFull$ResultDeserializer");
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@ -45,8 +47,10 @@ public class ConsumerLoopFull {
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return consumer;
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to create native consumer, host: %s, %sErrMessage: %s%n",
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System.out.printf("Failed to create websocket consumer, host: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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config.getProperty("bootstrap.servers"),
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config.getProperty("group.id"),
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config.getProperty("client.id"),
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -58,9 +62,8 @@ public class ConsumerLoopFull {
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public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: poll_data_code_piece
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List<String> topics = Collections.singletonList("topic_meters");
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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// subscribe to the topics
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consumer.subscribe(topics);
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System.out.println("Subscribe topics successfully.");
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@ -69,13 +72,16 @@ public class ConsumerLoopFull {
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ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
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for (ConsumerRecord<ResultBean> record : records) {
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ResultBean bean = record.value();
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// process the data here
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// Add your data processing logic here
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System.out.println("data: " + JSON.toJSONString(bean));
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}
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}
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to poll data, %sErrMessage: %s%n",
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System.out.printf("Failed to poll data, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -87,9 +93,8 @@ public class ConsumerLoopFull {
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public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: consumer_seek
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List<String> topics = Collections.singletonList("topic_meters");
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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// subscribe to the topics
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consumer.subscribe(topics);
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System.out.println("Subscribe topics successfully.");
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@ -106,7 +111,10 @@ public class ConsumerLoopFull {
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System.out.println("Assignment seek to beginning successfully.");
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to execute seek example, %sErrMessage: %s%n",
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System.out.printf("Failed to seek offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -119,15 +127,14 @@ public class ConsumerLoopFull {
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public static void commitExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: commit_code_piece
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List<String> topics = Collections.singletonList("topic_meters");
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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consumer.subscribe(topics);
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for (int i = 0; i < 50; i++) {
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ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
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for (ConsumerRecord<ResultBean> record : records) {
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ResultBean bean = record.value();
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// process your data here
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// Add your data processing logic here
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System.out.println("data: " + JSON.toJSONString(bean));
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}
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if (!records.isEmpty()) {
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@ -138,7 +145,10 @@ public class ConsumerLoopFull {
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}
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to execute commit example, %sErrMessage: %s%n",
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System.out.printf("Failed to commit offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -158,7 +168,10 @@ public class ConsumerLoopFull {
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System.out.println("Consumer unsubscribed successfully.");
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to unsubscribe consumer, %sErrMessage: %s%n",
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System.out.printf("Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -25,25 +25,26 @@ public class JdbcInsertDataDemo {
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properties.setProperty("timezone", "UTC-8");
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System.out.println("get connection starting...");
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// ANCHOR: insert_data
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// insert data, please make sure the database and table are created before
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String insertQuery = "INSERT INTO " +
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"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
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"VALUES " +
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"(NOW + 1a, 10.30000, 219, 0.31000) " +
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"(NOW + 2a, 12.60000, 218, 0.33000) " +
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"(NOW + 3a, 12.30000, 221, 0.31000) " +
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"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
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"VALUES " +
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"(NOW + 1a, 10.30000, 218, 0.25000) ";
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try (Connection connection = DriverManager.getConnection(jdbcUrl, properties);
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Statement stmt = connection.createStatement()) {
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// insert data, please make sure the database and table are created before
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String insertQuery = "INSERT INTO " +
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"power.d1001 USING power.meters TAGS(2,'California.SanFrancisco') " +
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"VALUES " +
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"(NOW + 1a, 10.30000, 219, 0.31000) " +
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"(NOW + 2a, 12.60000, 218, 0.33000) " +
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"(NOW + 3a, 12.30000, 221, 0.31000) " +
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"power.d1002 USING power.meters TAGS(3, 'California.SanFrancisco') " +
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"VALUES " +
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"(NOW + 1a, 10.30000, 218, 0.25000) ";
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int affectedRows = stmt.executeUpdate(insertQuery);
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// you can check affectedRows here
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System.out.println("Successfully inserted " + affectedRows + " rows to power.meters.");
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to insert data to power.meters, %sErrMessage: %s%n",
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System.out.printf("Failed to insert data to power.meters, sql: %s, %sErrMessage: %s%n",
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insertQuery,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -19,6 +19,8 @@ public class WsConsumerLoopFull {
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static private Connection connection;
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static private Statement statement;
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static private volatile boolean stopThread = false;
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static private String groupId = "group1";
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static private String clientId = "clinet1";
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public static TaosConsumer<ResultBean> getConsumer() throws Exception {
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// ANCHOR: create_consumer
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@ -30,7 +32,7 @@ public class WsConsumerLoopFull {
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config.setProperty("enable.auto.commit", "true");
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config.setProperty("auto.commit.interval.ms", "1000");
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config.setProperty("group.id", "group1");
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config.setProperty("client.id", "1");
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config.setProperty("client.id", "clinet1");
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config.setProperty("td.connect.user", "root");
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config.setProperty("td.connect.pass", "taosdata");
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config.setProperty("value.deserializer", "com.taos.example.WsConsumerLoopFull$ResultDeserializer");
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@ -45,8 +47,10 @@ public class WsConsumerLoopFull {
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return consumer;
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to create websocket consumer, host: %s, %sErrMessage: %s%n",
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System.out.printf("Failed to create websocket consumer, host: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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config.getProperty("bootstrap.servers"),
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config.getProperty("group.id"),
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config.getProperty("client.id"),
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -58,9 +62,8 @@ public class WsConsumerLoopFull {
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public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: poll_data_code_piece
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List<String> topics = Collections.singletonList("topic_meters");
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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// subscribe to the topics
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consumer.subscribe(topics);
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System.out.println("Subscribe topics successfully.");
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@ -69,13 +72,16 @@ public class WsConsumerLoopFull {
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ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
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for (ConsumerRecord<ResultBean> record : records) {
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ResultBean bean = record.value();
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// process the data here
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// Add your data processing logic here
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System.out.println("data: " + JSON.toJSONString(bean));
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}
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}
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to poll data, %sErrMessage: %s%n",
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System.out.printf("Failed to poll data, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -87,9 +93,8 @@ public class WsConsumerLoopFull {
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public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: consumer_seek
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List<String> topics = Collections.singletonList("topic_meters");
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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// subscribe to the topics
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consumer.subscribe(topics);
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System.out.println("Subscribe topics successfully.");
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@ -106,7 +111,10 @@ public class WsConsumerLoopFull {
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System.out.println("Assignment seek to beginning successfully.");
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to execute seek example, %sErrMessage: %s%n",
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System.out.printf("Failed to seek offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -119,15 +127,14 @@ public class WsConsumerLoopFull {
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public static void commitExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: commit_code_piece
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List<String> topics = Collections.singletonList("topic_meters");
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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consumer.subscribe(topics);
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for (int i = 0; i < 50; i++) {
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ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
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for (ConsumerRecord<ResultBean> record : records) {
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ResultBean bean = record.value();
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// process your data here
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// Add your data processing logic here
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System.out.println("data: " + JSON.toJSONString(bean));
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}
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if (!records.isEmpty()) {
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@ -138,7 +145,10 @@ public class WsConsumerLoopFull {
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}
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to execute commit example, %sErrMessage: %s%n",
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System.out.printf("Failed to commit offset, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -158,7 +168,10 @@ public class WsConsumerLoopFull {
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System.out.println("Consumer unsubscribed successfully.");
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to unsubscribe consumer, %sErrMessage: %s%n",
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System.out.printf("Failed to unsubscribe consumer, topic: %s, groupId: %s, clientId: %s, %sErrMessage: %s%n",
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topics.get(0),
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groupId,
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clientId,
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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@ -1,384 +0,0 @@
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package com.taosdata.example;
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import com.alibaba.fastjson.JSON;
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import com.taosdata.jdbc.TSDBDriver;
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import com.taosdata.jdbc.tmq.*;
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import java.sql.*;
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import java.time.Duration;
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import java.util.Collections;
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import java.util.List;
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import java.util.Properties;
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import java.util.Set;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.TimeUnit;
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// ANCHOR: consumer_demo
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public class ConsumerLoopFull {
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static private Connection connection;
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static private Statement statement;
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static private volatile boolean stopThread = false;
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public static TaosConsumer<ResultBean> getConsumer() throws Exception {
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// ANCHOR: create_consumer
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Properties config = new Properties();
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config.setProperty("td.connect.type", "jni");
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config.setProperty("bootstrap.servers", "localhost:6030");
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config.setProperty("auto.offset.reset", "latest");
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config.setProperty("msg.with.table.name", "true");
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config.setProperty("enable.auto.commit", "true");
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config.setProperty("auto.commit.interval.ms", "1000");
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config.setProperty("group.id", "group1");
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config.setProperty("client.id", "1");
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config.setProperty("td.connect.user", "root");
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config.setProperty("td.connect.pass", "taosdata");
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config.setProperty("value.deserializer", "com.taosdata.example.ConsumerLoopFull$ResultDeserializer");
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config.setProperty("value.deserializer.encoding", "UTF-8");
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try {
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TaosConsumer<ResultBean> consumer= new TaosConsumer<>(config);
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System.out.printf("Create consumer successfully, host: %s, groupId: %s, clientId: %s%n",
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config.getProperty("bootstrap.servers"),
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config.getProperty("group.id"),
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config.getProperty("client.id"));
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return consumer;
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to create native consumer, host: %s, %sErrMessage: %s%n",
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config.getProperty("bootstrap.servers"),
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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ex.printStackTrace();
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throw ex;
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}
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// ANCHOR_END: create_consumer
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}
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public static void pollExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: poll_data_code_piece
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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// subscribe to the topics
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consumer.subscribe(topics);
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System.out.println("Subscribe topics successfully.");
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for (int i = 0; i < 50; i++) {
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// poll data
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ConsumerRecords<ResultBean> records = consumer.poll(Duration.ofMillis(100));
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for (ConsumerRecord<ResultBean> record : records) {
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ResultBean bean = record.value();
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// process the data here
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System.out.println("data: " + JSON.toJSONString(bean));
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}
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}
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} catch (Exception ex) {
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// please refer to the JDBC specifications for detailed exceptions info
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System.out.printf("Failed to poll data, %sErrMessage: %s%n",
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ex instanceof SQLException ? "ErrCode: " + ((SQLException) ex).getErrorCode() + ", " : "",
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ex.getMessage());
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// Print stack trace for context in examples. Use logging in production.
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ex.printStackTrace();
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throw ex;
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}
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// ANCHOR_END: poll_data_code_piece
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}
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public static void seekExample(TaosConsumer<ResultBean> consumer) throws SQLException {
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// ANCHOR: consumer_seek
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try {
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List<String> topics = Collections.singletonList("topic_meters");
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// subscribe to the topics
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consumer.subscribe(topics);
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System.out.println("Subscribe topics successfully.");
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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
|
||||
|
|
@ -1,55 +0,0 @@
|
|||
package com.taosdata.example;
|
||||
|
||||
import com.taosdata.jdbc.AbstractStatement;
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -1,54 +0,0 @@
|
|||
package com.taosdata.example;
|
||||
|
||||
import com.taosdata.jdbc.AbstractStatement;
|
||||
|
||||
import java.sql.*;
|
||||
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
|
||||
}
|
||||
}
|
||||
|
|
@ -1,57 +0,0 @@
|
|||
package com.taosdata.example;
|
||||
|
||||
import com.taosdata.jdbc.AbstractStatement;
|
||||
|
||||
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
|
||||
}
|
||||
}
|
||||
|
|
@ -1,64 +0,0 @@
|
|||
package com.taosdata.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);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -1,90 +0,0 @@
|
|||
package com.taosdata.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
|
||||
|
|
@ -1,47 +0,0 @@
|
|||
package com.taosdata.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
|
||||
|
|
@ -1,47 +0,0 @@
|
|||
package com.taosdata.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
|
||||
|
|
@ -1,69 +0,0 @@
|
|||
package com.taosdata.example;
|
||||
|
||||
import com.taosdata.jdbc.TSDBPreparedStatement;
|
||||
import com.taosdata.jdbc.ws.TSWSPreparedStatement;
|
||||
|
||||
import java.sql.*;
|
||||
import java.util.ArrayList;
|
||||
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
|
||||
|
|
@ -1,384 +0,0 @@
|
|||
package com.taosdata.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.taosdata.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
|
||||
Loading…
Reference in New Issue