/**
* 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();
}