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.consumer;
  
  
  import java.util.Iterator;
  import java.util.concurrent.BlockingQueue;
  
  import io.jafka.common.annotations.ClientSide;
  import io.jafka.producer.serializer.Decoder;
  
  /**
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  @ClientSide
  public class MessageStream<T> implements Iterable<T> {
  
      final String topic;
  
      final BlockingQueue<FetchedDataChunk> queue;
  
      final int consumerTimeoutMs;
  
      final Decoder<T> decoder;
  
      private final ConsumerIterator<T> consumerIterator;
  
      public MessageStream(String topic, BlockingQueue<FetchedDataChunk> queue, int consumerTimeoutMs, Decoder<T> decoder) {
          super();
          this.topic = topic;
          this.queue = queue;
          this.consumerTimeoutMs = consumerTimeoutMs;
          this.decoder = decoder;
          this.consumerIterator = new ConsumerIterator<T>(topic, queue, consumerTimeoutMs, decoder);
      }
  
      public Iterator<T> iterator() {
          return consumerIterator;
      }
  
      /**
       * This method clears the queue being iterated during the consumer
       * rebalancing. This is mainly to reduce the number of duplicates
       * received by the consumer
       */
      public void clear() {
          consumerIterator.clearCurrentChunk();
      }
  }
  