| /** |
| * 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 backtype.storm.testing; |
| |
| import backtype.storm.generated.GlobalStreamId; |
| import backtype.storm.grouping.CustomStreamGrouping; |
| import backtype.storm.task.WorkerTopologyContext; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| public class NGrouping implements CustomStreamGrouping { |
| int _n; |
| List<Integer> _outTasks; |
| |
| public NGrouping(int n) { |
| _n = n; |
| } |
| |
| @Override |
| public void prepare(WorkerTopologyContext context, GlobalStreamId stream, List<Integer> targetTasks) { |
| targetTasks = new ArrayList<Integer>(targetTasks); |
| Collections.sort(targetTasks); |
| _outTasks = new ArrayList<Integer>(); |
| for (int i = 0; i < _n; i++) { |
| _outTasks.add(targetTasks.get(i)); |
| } |
| } |
| |
| @Override |
| public List<Integer> chooseTasks(int taskId, List<Object> values) { |
| return _outTasks; |
| } |
| |
| } |