/**
* 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 org.apache.lucene.gdata.search.index;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
/**
* This {@link IndexTask} will idle the given time if no task is on the queue.
* If the idle time exceeds the task will force a commit on the index. The timer
* will be reset if a task is on the queue.
*
* @author Simon Willnauer
*
*/
class TimedIndexTask extends IndexTask {
protected final static TimeUnit TIME_UNIT = TimeUnit.SECONDS;
protected final static long DEFAULT_IDLE_TIME = 30;
private final long idleTime;
TimedIndexTask(final GDataIndexer indexer,
final BlockingQueue<Future<IndexDocument>> taskQueue,
final long idleTime) {
super(indexer, taskQueue);
this.idleTime = idleTime < DEFAULT_IDLE_TIME ? DEFAULT_IDLE_TIME
: idleTime;
}
/**
* @see org.apache.lucene.gdata.search.index.IndexTask#getTask()
*/
@Override
protected Future<IndexDocument> getTask() throws InterruptedException {
/*
* wait for a certain time and return null if no task is on the queue.
* If return null --> commit will be called
*/
Future<IndexDocument> retVal = this.taskQueue.poll(this.idleTime, TIME_UNIT);
if(retVal== null)
this.commit.set(true);
return retVal;
}
protected long getIdleTime(){
return this.idleTime;
}
}
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