/*
* 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.trident.rotation;
import storm.trident.tuple.TridentTuple;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.atomic.AtomicBoolean;
public class TimedRotationPolicy implements FileRotationPolicy {
public static enum TimeUnit {
SECONDS((long)1000),
MINUTES((long)1000*60),
HOURS((long)1000*60*60),
DAYS((long)1000*60*60*24);
private long milliSeconds;
private TimeUnit(long milliSeconds){
this.milliSeconds = milliSeconds;
}
public long getMilliSeconds(){
return milliSeconds;
}
}
private long interval;
private Timer rotationTimer;
private AtomicBoolean rotationTimerTriggered = new AtomicBoolean();
public TimedRotationPolicy(float count, TimeUnit units){
this.interval = (long)(count * units.getMilliSeconds());
}
/**
* Called for every tuple the HdfsBolt executes.
*
* @param tuple The tuple executed.
* @param offset current offset of file being written
* @return true if a file rotation should be performed
*/
@Override
public boolean mark(TridentTuple tuple, long offset) {
return rotationTimerTriggered.get();
}
@Override
public boolean mark(long offset) {
return rotationTimerTriggered.get();
}
/**
* Called after the HdfsBolt rotates a file.
*/
@Override
public void reset() {
rotationTimerTriggered.set(false);
}
public long getInterval(){
return this.interval;
}
/**
* Start the timer to run at fixed intervals.
*/
@Override
public void start() {
rotationTimer = new Timer(true);
TimerTask task = new TimerTask() {
@Override
public void run() {
rotationTimerTriggered.set(true);
}
};
rotationTimer.scheduleAtFixedRate(task, interval, interval);
}
}