| /* |
| * 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.kafka.streams.tests; |
| |
| import org.apache.kafka.common.TopicPartition; |
| import org.apache.kafka.common.serialization.Serdes; |
| import org.apache.kafka.common.utils.Utils; |
| import org.apache.kafka.streams.KafkaStreams; |
| import org.apache.kafka.streams.KafkaStreams.State; |
| import org.apache.kafka.streams.StreamsBuilder; |
| import org.apache.kafka.streams.StreamsConfig; |
| import org.apache.kafka.streams.kstream.ForeachAction; |
| import org.apache.kafka.streams.processor.TaskMetadata; |
| import org.apache.kafka.streams.processor.ThreadMetadata; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Properties; |
| import java.util.Set; |
| |
| public class StreamsUpgradeToCooperativeRebalanceTest { |
| |
| |
| @SuppressWarnings("unchecked") |
| public static void main(final String[] args) throws Exception { |
| if (args.length < 1) { |
| System.err.println("StreamsUpgradeToCooperativeRebalanceTest requires one argument (properties-file) but none provided"); |
| } |
| System.out.println("Args are " + Arrays.toString(args)); |
| final String propFileName = args[0]; |
| final Properties streamsProperties = Utils.loadProps(propFileName); |
| |
| final Properties config = new Properties(); |
| System.out.println("StreamsTest instance started (StreamsUpgradeToCooperativeRebalanceTest v1.1)"); |
| System.out.println("props=" + streamsProperties); |
| |
| config.put(StreamsConfig.APPLICATION_ID_CONFIG, "cooperative-rebalance-upgrade"); |
| config.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass()); |
| config.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass()); |
| config.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 1000L); |
| config.putAll(streamsProperties); |
| |
| final String sourceTopic = streamsProperties.getProperty("source.topic", "source"); |
| final String sinkTopic = streamsProperties.getProperty("sink.topic", "sink"); |
| final String taskDelimiter = streamsProperties.getProperty("task.delimiter", "#"); |
| final int reportInterval = Integer.parseInt(streamsProperties.getProperty("report.interval", "100")); |
| final String upgradePhase = streamsProperties.getProperty("upgrade.phase", ""); |
| |
| final StreamsBuilder builder = new StreamsBuilder(); |
| |
| builder.<String, String>stream(sourceTopic) |
| .peek(new ForeachAction<String, String>() { |
| int recordCounter = 0; |
| |
| @Override |
| public void apply(final String key, final String value) { |
| if (recordCounter++ % reportInterval == 0) { |
| System.out.println(String.format("%sProcessed %d records so far", upgradePhase, recordCounter)); |
| System.out.flush(); |
| } |
| } |
| } |
| ).to(sinkTopic); |
| |
| final KafkaStreams streams = new KafkaStreams(builder.build(), config); |
| |
| streams.setStateListener((newState, oldState) -> { |
| if (newState == State.RUNNING && oldState == State.REBALANCING) { |
| System.out.println(String.format("%sSTREAMS in a RUNNING State", upgradePhase)); |
| final Set<ThreadMetadata> allThreadMetadata = streams.localThreadsMetadata(); |
| final StringBuilder taskReportBuilder = new StringBuilder(); |
| final List<String> activeTasks = new ArrayList<>(); |
| final List<String> standbyTasks = new ArrayList<>(); |
| for (final ThreadMetadata threadMetadata : allThreadMetadata) { |
| getTasks(threadMetadata.activeTasks(), activeTasks); |
| if (!threadMetadata.standbyTasks().isEmpty()) { |
| getTasks(threadMetadata.standbyTasks(), standbyTasks); |
| } |
| } |
| addTasksToBuilder(activeTasks, taskReportBuilder); |
| taskReportBuilder.append(taskDelimiter); |
| if (!standbyTasks.isEmpty()) { |
| addTasksToBuilder(standbyTasks, taskReportBuilder); |
| } |
| System.out.println("TASK-ASSIGNMENTS:" + taskReportBuilder); |
| } |
| |
| if (newState == State.REBALANCING) { |
| System.out.println(String.format("%sStarting a REBALANCE", upgradePhase)); |
| } |
| }); |
| |
| |
| streams.start(); |
| |
| Runtime.getRuntime().addShutdownHook(new Thread(() -> { |
| streams.close(); |
| System.out.println(String.format("%sCOOPERATIVE-REBALANCE-TEST-CLIENT-CLOSED", upgradePhase)); |
| System.out.flush(); |
| })); |
| } |
| |
| private static void addTasksToBuilder(final List<String> tasks, final StringBuilder builder) { |
| if (!tasks.isEmpty()) { |
| for (final String task : tasks) { |
| builder.append(task).append(","); |
| } |
| builder.setLength(builder.length() - 1); |
| } |
| } |
| private static void getTasks(final Set<TaskMetadata> taskMetadata, |
| final List<String> taskList) { |
| for (final TaskMetadata task : taskMetadata) { |
| final Set<TopicPartition> topicPartitions = task.topicPartitions(); |
| for (final TopicPartition topicPartition : topicPartitions) { |
| taskList.add(topicPartition.toString()); |
| } |
| } |
| } |
| } |