ZoieIndexingStatusAdmin.java

package proj.zoie.mbean;
/**
 * 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.
 */
import java.util.Date;

import proj.zoie.impl.indexing.IndexUpdatedEvent;
import proj.zoie.impl.indexing.IndexingEventListener;
import proj.zoie.impl.indexing.ZoieSystem;

public class ZoieIndexingStatusAdmin implements ZoieIndexingStatusAdminMBean,IndexingEventListener{
	private final ZoieSystem<?,?> _zoieSystem;
	private long _endTime;
	private long _startTime;
	private int _leftOver;
	private int _size;
	private long _totalTime;
	private int _totalSize;
	
	public ZoieIndexingStatusAdmin(ZoieSystem<?,?> zoieSystem){
		_zoieSystem = zoieSystem;
		_zoieSystem.addIndexingEventListener(this);
		_startTime = 0L;
		_endTime = 0L;
		_leftOver = 0;
		_size = 0;
		_totalSize = 0;
		_totalTime = 0;
	}
	
	public long getAverageIndexingBatchDuration() {
		return _totalSize == 0 ? 0 : _totalTime/_totalSize;
	}

	public long getLastIndexingBatchDuration() {
		return _endTime - _startTime;
	}

	public int getLastIndexingBatchLeftOver() {
		return _leftOver;
	}

	public int getLastIndexingBatchSize() {
		return _size;
	}

	public Date getLastIndexingEndTime() {
		return new Date(_endTime);
	}

	public void resetAverage() {
		_totalSize = 0;
		_totalTime = 0;
	}

	public void handleIndexingEvent(IndexingEvent evt) {
		// only interested in IndexUpdateEvent
		if (evt instanceof IndexUpdatedEvent){
			IndexUpdatedEvent updateEvt = (IndexUpdatedEvent)evt;
			_startTime = updateEvt.getStartIndexingTime();
			_endTime = updateEvt.getEndIndexingTime();
			_leftOver = updateEvt.getNumDocsLeftInQueue();
			_size = updateEvt.getNumDocsIndexed();
			_totalSize += _size;
			_totalTime += (_endTime - _startTime);
		}	
	}
}