2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.plugins.context.locking.hazelcast;
23 import com.hazelcast.core.Hazelcast;
24 import com.hazelcast.core.HazelcastInstance;
26 import java.util.concurrent.locks.ReadWriteLock;
28 import org.onap.policy.apex.context.ContextException;
29 import org.onap.policy.apex.context.impl.locking.AbstractLockManager;
30 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
31 import org.slf4j.ext.XLogger;
32 import org.slf4j.ext.XLoggerFactory;
35 * The Class HazelcastLockManager manages Hazelcast locks for locks on items in Apex context albums.
37 * @author Liam Fallon (liam.fallon@ericsson.com)
39 public class HazelcastLockManager extends AbstractLockManager {
40 // Logger for this class
41 private static final XLogger LOGGER = XLoggerFactory.getXLogger(HazelcastLockManager.class);
43 private HazelcastInstance hazelcastInstance;
46 * Constructor, set up a lock manager that uses Hazelcast locking.
48 * @throws ContextException On errors connecting to the Hazelcast cluster
50 public HazelcastLockManager() throws ContextException {
51 LOGGER.entry("HazelcastLockManager(): setting up the Hazelcast lock manager . . .");
53 LOGGER.exit("HazelcastLockManager(): Hazelcast lock manager set up");
60 public void init(final AxArtifactKey key) throws ContextException {
61 LOGGER.entry("init(" + key + ")");
65 // Set up the Hazelcast instance for lock handling
66 hazelcastInstance = Hazelcast.newHazelcastInstance();
68 LOGGER.exit("init(" + key + ")");
75 public ReadWriteLock getReentrantReadWriteLock(final String lockId) throws ContextException {
76 // Check if the framework is active
77 if (hazelcastInstance != null && hazelcastInstance.getLifecycleService().isRunning()) {
78 return new HazelcastLock(hazelcastInstance, lockId);
80 throw new ContextException("creation of hazelcast lock failed, see error log for details");
88 public void shutdown() {
89 if (hazelcastInstance == null) {
92 hazelcastInstance.shutdown();
93 hazelcastInstance = null;