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.utils.Utils;
  import org.apache.kafka.streams.KafkaStreams;
  import org.apache.kafka.streams.StreamsBuilder;
  import org.apache.kafka.streams.StreamsConfig;
  import org.apache.kafka.streams.kstream.KStream;
  import org.apache.kafka.streams.processor.AbstractProcessor;
  import org.apache.kafka.streams.processor.Processor;
  import org.apache.kafka.streams.processor.ProcessorContext;
  import org.apache.kafka.streams.processor.ProcessorSupplier;
  
  import java.util.Properties;
  
  public class StreamsUpgradeTest {
  
      @SuppressWarnings("unchecked")
      public static void main(final String[] args) throws Exception {
          if (args.length < 1) {
              System.err.println("StreamsUpgradeTest requires one argument (properties-file) but provided none");
          }
          final String propFileName = args[0];
  
          final Properties streamsProperties = Utils.loadProps(propFileName);
  
          System.out.println("StreamsTest instance started (StreamsUpgradeTest v1.1)");
          System.out.println("props=" + streamsProperties);
  
          final StreamsBuilder builder = new StreamsBuilder();
          final KStream dataStream = builder.stream("data");
          dataStream.process(printProcessorSupplier());
          dataStream.to("echo");
  
          final Properties config = new Properties();
          config.setProperty(StreamsConfig.APPLICATION_ID_CONFIG, "StreamsUpgradeTest");
          config.put(StreamsConfig.COMMIT_INTERVAL_MS_CONFIG, 1000L);
          config.putAll(streamsProperties);
  
          final KafkaStreams streams = new KafkaStreams(builder.build(), config);
          streams.start();
  
          Runtime.getRuntime().addShutdownHook(new Thread() {
              @Override
              public void run() {
                  streams.close();
                  System.out.println("UPGRADE-TEST-CLIENT-CLOSED");
                  System.out.flush();
              }
          });
      }
  
      private static <K, V> ProcessorSupplier<K, V> printProcessorSupplier() {
          return new ProcessorSupplier<K, V>() {
              public Processor<K, V> get() {
                  return new AbstractProcessor<K, V>() {
                      private int numRecordsProcessed = 0;
  
                      @Override
                      public void init(final ProcessorContext context) {
                          System.out.println("[1.1] initializing processor: topic=data taskId=" + context.taskId());
                          numRecordsProcessed = 0;
                      }
  
                      @Override
                      public void process(final K key, final V value) {
                          numRecordsProcessed++;
                          if (numRecordsProcessed % 100 == 0) {
                              System.out.println("processed " + numRecordsProcessed + " records from topic=data");
                          }
                      }
  
                      @Override
                      public void punctuate(final long timestamp) {}
  
                      @Override
                      public void close() {}
                  };
              }
          };
      }
  }
  