/*
  *
  *  *  Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
  *  *
  *  *  Licensed 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.
  *  *
  *  * For more information: http://www.orientechnologies.com
  *
  */
package com.orientechnologies.common.concur.resource;

import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

/**
 * Shared resource abstract class. Sub classes can acquire and release shared and exclusive locks.
 * 
 * @author Luca Garulli (l.garulli--at--orientechnologies.com)
 * 
 */
public abstract class OSharedResourceAbstract {
	protected final ReadWriteLock	lock	= new ReentrantReadWriteLock();

	protected void acquireSharedLock() {
		lock.readLock().lock();
	}

	protected void releaseSharedLock() {
		lock.readLock().unlock();
	}

	protected void acquireExclusiveLock() {
		lock.writeLock().lock();
	}

	protected void releaseExclusiveLock() {
		lock.writeLock().unlock();
	}
}