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.jstorm.example.unittests.trident;
  
  import backtype.storm.tuple.Fields;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author binyang.dby on 2016/7/9.
   *
   * This is a finite version of the FixedBatchSpout class.
   * Using the BasicLimitBatchSpout, pick at most maxBatchSize content in the outputs and emit as
   * a batch. The content will be circle but has a limit.
   */
  public class FixedLimitBatchSpout extends BasicLimitBatchSpout
  {
      private List<Object>[] outputs;
      private int index;
  
      public FixedLimitBatchSpout(long limit, Fields fields, int maxBatchSize, List<Object>... outputs) {
          super(limit, fields, maxBatchSize);
          this.outputs = outputs;
      }
  
      @Override
      protected List<List<Object>> getBatchContent(int maxBatchSize) {
          List<List<Object>> returnBatch = new ArrayList<List<Object>>();
  
          if(index >= outputs.length)
              index = 0;
  
          for(int i = 0; i < maxBatchSize && index < outputs.length; i++, index++)
              returnBatch.add(outputs[index]);
  
          return returnBatch;
      }
  }
  