001/*
002 *  Copyright 2010 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.web.live;
017
018import java.util.concurrent.locks.Lock;
019import java.util.concurrent.locks.ReentrantLock;
020
021import org.apache.avalon.framework.activity.Disposable;
022import org.apache.avalon.framework.activity.Initializable;
023import org.apache.avalon.framework.component.Component;
024
025/**
026 * LiveAccessManager for providing the write lock for
027 * synchronizing live modifications.
028 */
029public class LiveAccessManager implements Component, Initializable, Disposable
030{
031    /** Avalon ROLE .*/
032    public static final String ROLE = LiveAccessManager.class.getName();
033    private Lock _lock;
034    
035    @Override
036    public void initialize() throws Exception
037    {
038        _lock = new ReentrantLock(true);
039    }
040    
041    /**
042     * Retrieves the live write lock.
043     * @return the lock.
044     */
045    public Lock getLiveWriteLock()
046    {
047        return _lock;
048    }
049    
050    @Override
051    public void dispose()
052    {
053        _lock = null;
054    }
055}