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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.distribution.infinispan;
import java.util.Map;
import org.onap.policy.apex.context.ContextException;
import org.onap.policy.apex.context.impl.distribution.AbstractDistributor;
import org.onap.policy.apex.context.parameters.ContextParameterConstants;
import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
import org.onap.policy.common.parameters.ParameterService;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This context distributor distributes context across threads in multiple JVMs on multiple hosts. It uses Infinispan to
* distribute maps.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class InfinispanContextDistributor extends AbstractDistributor {
// Logger for this class
private static final XLogger LOGGER = XLoggerFactory.getXLogger(InfinispanContextDistributor.class);
// The infinispan manager for distributing context for this JVM
private static InfinispanManager infinispanManager = null;
/**
* Create an instance of an Infinispan Context Distributor.
*
* @throws ContextException On errors creating the context distributor
*/
public InfinispanContextDistributor() throws ContextException {
LOGGER.entry("InfinispanContextDistributor()");
LOGGER.exit("InfinispanContextDistributor()");
}
/**
* {@inheritDoc}.
*/
@Override
public void init(final AxArtifactKey key) throws ContextException {
LOGGER.entry("init(" + key + ")");
super.init(key);
// Create the infinispan manager if it does not already exist
if (infinispanManager == null) {
// Get the parameters from the parameter service
final InfinispanDistributorParameters parameters = ParameterService
.get(ContextParameterConstants.DISTRIBUTOR_GROUP_NAME);
LOGGER.debug("initiating Infinispan with the parameters: {}", parameters);
// Create the manager
setInfinispanManager(new InfinispanManager(parameters));
}
LOGGER.exit("init(" + key + ")");
}
/**
* Set the infinispan manager statically.
* @param newInfinispanManager the new infinspan manager instance
*/
private static void setInfinispanManager(InfinispanManager newInfinispanManager) {
infinispanManager = newInfinispanManager;
}
/**
* {@inheritDoc}.
*/
@Override
public Map<String, Object> getContextAlbumMap(final AxArtifactKey contextAlbumKey) {
LOGGER.info("InfinispanContextDistributor: create album: " + contextAlbumKey.getId());
// Get the Cache from Infinispan
return infinispanManager.getCacheManager().getCache(contextAlbumKey.getId().replace(':', '_'));
}
/**
* {@inheritDoc}.
*/
@Override
public void shutdown() {
// Shut down the infinispan manager
if (infinispanManager != null) {
infinispanManager.shutdown();
}
setInfinispanManager(null);
}
}
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