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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.plugins.context.locking.curator;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.recipes.locks.InterProcessReadWriteLock;
/**
* This class maps a Curator {@link InterProcessReadWriteLock} to a Java {@link ReadWriteLock}.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class CuratorReentrantReadWriteLock implements ReadWriteLock {
// The Lock ID
private final String lockId;
// The Curator lock
private final InterProcessReadWriteLock curatorReadWriteLock;
// The Curator Lock facades for read and write locks
private final CuratorLockFacade readLockFacade;
private final CuratorLockFacade writeLockFacade;
/**
* Create a Curator lock.
*
* @param curatorFramework the Curator framework to use to create the lock
* @param lockId The unique ID of the lock.
*/
public CuratorReentrantReadWriteLock(final CuratorFramework curatorFramework, final String lockId) {
this.lockId = lockId;
// Create the Curator lock
curatorReadWriteLock = new InterProcessReadWriteLock(curatorFramework, lockId);
// Create the lock facades
readLockFacade = new CuratorLockFacade(curatorReadWriteLock.readLock(), lockId);
writeLockFacade = new CuratorLockFacade(curatorReadWriteLock.writeLock(), lockId);
}
/**
* Get the lock Id of the lock.
*
* @return the lock ID
*/
public String getLockId() {
return lockId;
}
/**
* {@inheritDoc}.
*/
@Override
public Lock readLock() {
return readLockFacade;
}
/**
* {@inheritDoc}.
*/
@Override
public Lock writeLock() {
return writeLockFacade;
}
}
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