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.task.group;
  
  import java.util.List;
  
  import backtype.storm.generated.GlobalStreamId;
  import backtype.storm.grouping.CustomStreamGrouping;
  import backtype.storm.task.TopologyContext;
  
  /**
   * user defined grouping method
   *
   * @author Longda/yannian
   */
  public class MkCustomGrouper {
      private CustomStreamGrouping grouping;
  
      private int myTaskId;
  
      public MkCustomGrouper(TopologyContext context, CustomStreamGrouping grouping,
                             GlobalStreamId stream, List<Integer> targetTask, int myTaskId) {
          this.myTaskId = myTaskId;
          this.grouping = grouping;
          this.grouping.prepare(context, stream, targetTask);
  
      }
  
      public List<Integer> grouper(List<Object> values) {
          return this.grouping.chooseTasks(myTaskId, values);
      }
  }
  