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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.hazelcast;
import java.util.concurrent.locks.ReadWriteLock;
import org.onap.policy.apex.context.ContextException;
import org.onap.policy.apex.context.impl.locking.AbstractLockManager;
import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
/**
* The Class HazelcastLockManager manages Hazelcast locks for locks on items in Apex context albums.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class HazelcastLockManager extends AbstractLockManager {
// Logger for this class
private static final XLogger LOGGER = XLoggerFactory.getXLogger(HazelcastLockManager.class);
private HazelcastInstance hazelcastInstance;
/**
* Constructor, set up a lock manager that uses Hazelcast locking.
*
* @throws ContextException On errors connecting to the Hazelcast cluster
*/
public HazelcastLockManager() throws ContextException {
LOGGER.entry("HazelcastLockManager(): setting up the Hazelcast lock manager . . .");
LOGGER.exit("HazelcastLockManager(): Hazelcast lock manager set up");
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.context.impl.locking.AbstractLockManager#init(org.onap.policy.apex.
* model. basicmodel.concepts.AxArtifactKey)
*/
@Override
public void init(final AxArtifactKey key) throws ContextException {
LOGGER.entry("init(" + key + ")");
super.init(key);
// Set up the Hazelcast instance for lock handling
hazelcastInstance = Hazelcast.newHazelcastInstance();
LOGGER.exit("init(" + key + ")");
}
/*
* (non-Javadoc)
*
* @see
* org.onap.policy.apex.core.context.impl.locking.AbstractLockManager#getReentrantReadWriteLock(
* java.lang.String)
*/
@Override
public ReadWriteLock getReentrantReadWriteLock(final String lockId) throws ContextException {
// Check if the framework is active
if (hazelcastInstance != null && hazelcastInstance.getLifecycleService().isRunning()) {
return new HazelcastLock(hazelcastInstance, lockId);
} else {
throw new ContextException("creation of hazelcast lock failed, see error log for details");
}
}
/*
* (non-Javadoc)
*
* @see org.onap.policy.apex.core.context.LockManager#shutdown()
*/
@Override
public void shutdown() {
if (hazelcastInstance == null) {
return;
}
hazelcastInstance.shutdown();
hazelcastInstance = null;
}
}
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