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 io.jafka.server;
  
  import io.jafka.consumer.MessageStream;
  import io.jafka.message.Message;
  import io.jafka.producer.Producer;
  import io.jafka.producer.ProducerData;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.Closeable;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  /**
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  public class MirroringThread extends Thread implements Closeable {
  
      private static final Logger logger = LoggerFactory.getLogger(MirroringThread.class);
  
      private final MessageStream<Message> stream;
  
      private final String topic;
  
      private final int threadId;
  
      //
      private final CountDownLatch shutdownComplete = new CountDownLatch(1);
  
      private final Producer<Void, Message> producer;
  
      public MirroringThread(MessageStream<Message> stream, String topic, int threadId, Producer<Void, Message> producer) {
          super();
          this.stream = stream;
          this.topic = topic;
          this.threadId = threadId;
          this.producer = producer;
          //
          this.setDaemon(false);
          this.setName(String.format("jafka-embedded-consumer-%s-%d", topic, threadId));
      }
  
      @Override
      public void run() {
          logger.info(String.format("Starting mirroring thread %s for topic %s and stream %d", getName(), topic, threadId));
  
          try {
              for (Message message : stream) {
                  ProducerData<Void, Message> pd = new ProducerData<Void, Message>(topic, message);
                  producer.send(pd);
              }
          } catch (Exception e) {
              logger.error(topic + " stream " + threadId + " unexpectedly existed", e);
  
          } finally {
              shutdownComplete.countDown();
              logger.info("Stopped mirroring thread " + getName() + " for topic " + topic + " and stream " + threadId);
          }
      }
  
      public void close() {
          try {
              shutdownComplete.await(10, TimeUnit.SECONDS);
          } catch (InterruptedException e) {
              logger.error("Shutdown of thread " + getName() + " interrupted.  Mirroring thread might leak data!");
          }
      }
  
  }
  