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.io.Closeable;
  import java.io.IOException;
  import java.util.List;
  import java.util.Map;
  
  import io.jafka.producer.serializer.Decoder;
  
  /**
   * Main interface for consumer
   * 
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  public interface ConsumerConnector extends Closeable{
  
      /**
       * Create a list of {@link MessageStream} for each topic
       * @param <T> message type
       * @param topicCountMap a map of (topic,#streams) pair
       * @param decoder message decoder
       * @return a map of (topic,list of MessageStream) pair. The number of
       *         items in the list is #streams. Each MessageStream supports
       *         an iterator of messages.
       */
      <T> Map<String, List<MessageStream<T>>> createMessageStreams(//
              Map<String, Integer> topicCountMap, Decoder<T> decoder);
  
      /**
       * Commit the offsets of all broker partitions connected by this
       * connector
       */
      void commitOffsets();
  
      /**
       * Shut down the connector
       */
      public void close() throws IOException;
  }
  