| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.iotdb; |
| |
| import org.apache.iotdb.isession.SessionDataSet.DataIterator; |
| import org.apache.iotdb.isession.pool.SessionDataSetWrapper; |
| import org.apache.iotdb.rpc.IoTDBConnectionException; |
| import org.apache.iotdb.rpc.StatementExecutionException; |
| import org.apache.iotdb.session.pool.SessionPool; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| |
| @SuppressWarnings({"squid:S106", "squid:S1144"}) |
| public class SessionPoolExample { |
| private static final Logger LOGGER = LoggerFactory.getLogger(SessionPoolExample.class); |
| |
| private static SessionPool sessionPool; |
| private static ExecutorService service; |
| |
| /** Build a custom SessionPool for this example */ |
| private static void constructCustomSessionPool() { |
| sessionPool = |
| new SessionPool.Builder() |
| .host("127.0.0.1") |
| .port(6667) |
| .user("root") |
| .password("root") |
| .maxSize(3) |
| .build(); |
| } |
| |
| /** Build a redirect-able SessionPool for this example */ |
| private static void constructRedirectSessionPool() { |
| List<String> nodeUrls = new ArrayList<>(); |
| nodeUrls.add("127.0.0.1:6667"); |
| nodeUrls.add("127.0.0.1:6668"); |
| sessionPool = |
| new SessionPool.Builder() |
| .nodeUrls(nodeUrls) |
| .user("root") |
| .password("root") |
| .maxSize(3) |
| .build(); |
| } |
| |
| public static void main(String[] args) |
| throws StatementExecutionException, IoTDBConnectionException, InterruptedException { |
| // Choose the SessionPool you going to use |
| constructRedirectSessionPool(); |
| |
| service = Executors.newFixedThreadPool(10); |
| insertRecord(); |
| queryByRowRecord(); |
| Thread.sleep(1000); |
| queryByIterator(); |
| sessionPool.close(); |
| service.shutdown(); |
| } |
| |
| // more insert example, see SessionExample.java |
| private static void insertRecord() throws StatementExecutionException, IoTDBConnectionException { |
| String deviceId = "root.sg1.d1"; |
| List<String> measurements = new ArrayList<>(); |
| List<TSDataType> types = new ArrayList<>(); |
| measurements.add("s1"); |
| measurements.add("s2"); |
| measurements.add("s3"); |
| types.add(TSDataType.INT64); |
| types.add(TSDataType.INT64); |
| types.add(TSDataType.INT64); |
| |
| for (long time = 0; time < 10; time++) { |
| List<Object> values = new ArrayList<>(); |
| values.add(1L); |
| values.add(2L); |
| values.add(3L); |
| sessionPool.insertRecord(deviceId, time, measurements, types, values); |
| } |
| } |
| |
| private static void queryByRowRecord() { |
| for (int i = 0; i < 1; i++) { |
| service.submit( |
| () -> { |
| SessionDataSetWrapper wrapper = null; |
| try { |
| wrapper = sessionPool.executeQueryStatement("select * from root.sg1.d1"); |
| System.out.println(wrapper.getColumnNames()); |
| System.out.println(wrapper.getColumnTypes()); |
| while (wrapper.hasNext()) { |
| System.out.println(wrapper.next()); |
| } |
| } catch (IoTDBConnectionException | StatementExecutionException e) { |
| LOGGER.error("Query by row record error", e); |
| } finally { |
| // remember to close data set finally! |
| sessionPool.closeResultSet(wrapper); |
| } |
| }); |
| } |
| } |
| |
| private static void queryByIterator() { |
| for (int i = 0; i < 1; i++) { |
| service.submit( |
| () -> { |
| SessionDataSetWrapper wrapper = null; |
| try { |
| wrapper = sessionPool.executeQueryStatement("select * from root.sg1.d1"); |
| // get DataIterator like JDBC |
| DataIterator dataIterator = wrapper.iterator(); |
| System.out.println(wrapper.getColumnNames()); |
| System.out.println(wrapper.getColumnTypes()); |
| while (dataIterator.next()) { |
| StringBuilder builder = new StringBuilder(); |
| for (String columnName : wrapper.getColumnNames()) { |
| builder.append(dataIterator.getString(columnName) + " "); |
| } |
| System.out.println(builder); |
| } |
| } catch (IoTDBConnectionException | StatementExecutionException e) { |
| LOGGER.error("Query by Iterator error", e); |
| } finally { |
| // remember to close data set finally! |
| sessionPool.closeResultSet(wrapper); |
| } |
| }); |
| } |
| } |
| } |