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 com.alibaba.jstorm.kafka;
  
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import backtype.storm.task.TopologyContext;
  
  public class PartitionCoordinator {
  	private KafkaSpoutConfig config;
  	private Map<Integer, PartitionConsumer> partitionConsumerMap;
  	private List<PartitionConsumer> partitionConsumers;
  
  	private ZkState zkState;
  	public PartitionCoordinator(Map conf, KafkaSpoutConfig config, TopologyContext context, ZkState zkState) {
  		this.config = config;
  		this.zkState = zkState; 
  		partitionConsumers = new LinkedList<PartitionConsumer>();
  		createPartitionConsumers(conf, context);
  	}
  
  	private void createPartitionConsumers(Map conf, TopologyContext context) {
  	    partitionConsumerMap = new HashMap<Integer, PartitionConsumer>();
          int taskSize = context.getComponentTasks(context.getThisComponentId()).size();
          for(int i=context.getThisTaskIndex(); i<config.numPartitions; i+=taskSize) {
              PartitionConsumer partitionConsumer = new PartitionConsumer(conf, config, i, zkState);
              partitionConsumers.add(partitionConsumer);
              partitionConsumerMap.put(i, partitionConsumer);
          }
  	}
  
  	public List<PartitionConsumer> getPartitionConsumers() {
  		return partitionConsumers;
  	}
  	
  	public PartitionConsumer getConsumer(int partition) {
  		return partitionConsumerMap.get(partition);
  	}
  	
  	public void removeConsumer(int partition) {
  	    PartitionConsumer partitionConsumer = partitionConsumerMap.get(partition);
  		partitionConsumers.remove(partitionConsumer);
  		partitionConsumerMap.remove(partition);
  	}
  	
  	
  	 
  }
  