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.batch;
  
  import java.io.Serializable;
  
  import backtype.storm.topology.IBasicBolt;
  
  public interface IBatchSpout extends IBasicBolt, ICommitter, Serializable {
  
      /**
       * input's filed 0 is BatchId
       * 
       * execute only receive trigger message
       * 
       * do emitBatch operation in execute whose streamID is "batch/compute-stream"
       */
      // void execute(Tuple input, IBasicOutputCollector collector);
      /**
       * begin to ack batchId's data
       * 
       * return value will be stored in ZK, so sometimes don't need special action
       * 
       * @param id
       */
      // byte[] commit(BatchId id) throws FailedException;
  
      /**
       * begin to revert batchId's data
       * 
       * If current task fails to commit batchId, it won't call revert(batchId) If current task fails to revert batchId, JStorm won't call revert again.
       * 
       * if not transaction, it can don't care revert
       * 
       * @param id
       */
      // void revert(BatchId id, byte[] commitResult);
  }
  