content: /*
   * 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.serialization.Serdes;
  import org.apache.kafka.common.utils.Utils;
  import org.apache.kafka.streams.KafkaStreams;
  import org.apache.kafka.streams.StreamsConfig;
  import org.apache.kafka.streams.kstream.ForeachAction;
  import org.apache.kafka.streams.kstream.KStream;
  import org.apache.kafka.streams.kstream.KStreamBuilder;
  
  import java.util.Properties;
  
  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");
          }
          final String propFileName = args[0];
          final Properties streamsProperties = Utils.loadProps(propFileName);
          final Properties config = new Properties();
  
          System.out.println("StreamsTest instance started (StreamsUpgradeToCooperativeRebalanceTest v0.11.0)");
          System.out.println("props=" + config);
  
          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 = config.getProperty("source.topic", "source");
          final String sinkTopic = config.getProperty("sink.topic", "sink");
          final int reportInterval = Integer.parseInt(config.getProperty("report.interval", "100"));
          final String upgradePhase = config.getProperty("upgrade.phase",  "");
  
          final KStreamBuilder builder = new KStreamBuilder();
  
          final KStream<String, String> upgradeStream = builder.stream(sourceTopic);
          upgradeStream.foreach(new ForeachAction<String, String>() {
              int recordCounter = 0;
  
              @Override
              public void apply(final String key, final String value) {
                  if (recordCounter++ % reportInterval == 0) {
                      System.out.printf("%sProcessed %d records so far%n", upgradePhase, recordCounter);
                      System.out.flush();
                  }
              }
          }
          );
          upgradeStream.to(sinkTopic);
  
          final KafkaStreams streams = new KafkaStreams(builder, config);
  
  
          streams.start();
  
          Runtime.getRuntime().addShutdownHook(new Thread(() -> {
              streams.close();
              System.out.printf("%sCOOPERATIVE-REBALANCE-TEST-CLIENT-CLOSED%n", upgradePhase);
              System.out.flush();
          }));
      }
  }
  