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.hdfs.bolt.sync;
  
  import backtype.storm.tuple.Tuple;
  
  import java.io.Serializable;
  
  /**
   * Interface for controlling when the HdfsBolt
   * syncs and flushes the filesystem.
   *
   */
  public interface SyncPolicy extends Serializable {
      /**
       * Called for every tuple the HdfsBolt executes.
       *
       * @param tuple The tuple executed.
       * @param offset current offset for the file being written
       * @return true if a sync should be performed
       */
      boolean mark(Tuple tuple, long offset);
  
  
      /**
       * Called after the HdfsBolt performs a sync.
       *
       */
      void reset();
  
  }
  