/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.cache.jboss;
import java.io.Serializable;
import org.jboss.cache.CacheManager;
import org.jboss.cache.Fqn;
import org.jboss.cache.Node;
import org.jboss.cache.Region;
import org.jboss.cache.config.EvictionAlgorithmConfig;
import org.jboss.cache.config.EvictionRegionConfig;
import org.jboss.cache.eviction.ExpirationAlgorithmConfig;
import org.jboss.cache.eviction.LRUAlgorithmConfig;
import org.jboss.cache.eviction.RemoveOnEvictActionPolicy;
import org.teiid.cache.Cache;
import org.teiid.cache.CacheConfiguration;
import org.teiid.cache.CacheFactory;
import org.teiid.cache.CacheConfiguration.Policy;
import org.teiid.core.TeiidRuntimeException;
public class JBossCacheFactory implements CacheFactory, Serializable{
private static final long serialVersionUID = -2767452034178675653L;
private transient org.jboss.cache.Cache cacheStore;
private volatile boolean destroyed = false;
public JBossCacheFactory(String name, Object cm) throws Exception {
CacheManager cachemanager = (CacheManager)cm;
this.cacheStore = cachemanager.getCache(name, true);
}
/**
* {@inheritDoc}
*/
public Cache get(String location, CacheConfiguration config) {
if (!destroyed) {
if (!this.cacheStore.getCacheStatus().allowInvocations()) {
this.cacheStore.start();
}
Node cacheRoot = this.cacheStore.getRoot().addChild(Fqn.fromString("Teiid")); //$NON-NLS-1$
Node node = cacheRoot.addChild(Fqn.fromString(location));
node.setResident(true);
Region cacheRegion = this.cacheStore.getRegion(node.getFqn(), true);
cacheRegion.setEvictionRegionConfig(buildEvictionConfig(node.getFqn(), config));
JBossCache jc = null;
if (config != null && config.getPolicy().equals(Policy.EXPIRATION)) {
jc = new ExpirationAwareCache(this.cacheStore, node.getFqn());
}
else {
jc = new JBossCache(this.cacheStore, node.getFqn());
}
jc.setCacheConfiguration(config);
return jc;
}
throw new TeiidRuntimeException("Cache system has been shutdown"); //$NON-NLS-1$
}
private EvictionRegionConfig buildEvictionConfig(Fqn rootFqn, CacheConfiguration config) {
EvictionAlgorithmConfig evictionConfig = null;
if (config.getPolicy() == Policy.LRU) {
LRUAlgorithmConfig lru = new LRUAlgorithmConfig();
lru.setMaxNodes(config.getMaxEntries());
lru.setMaxAge(config.getMaxAgeInSeconds()*1000);
lru.setTimeToLive(-1); // -1 no limit
evictionConfig = lru;
}
else if (config.getPolicy() == Policy.EXPIRATION) {
ExpirationAlgorithmConfig lfu = new ExpirationAlgorithmConfig();
lfu.setMaxNodes(config.getMaxEntries());
evictionConfig = lfu;
}
EvictionRegionConfig erc = new EvictionRegionConfig(rootFqn, evictionConfig);
erc.setEvictionActionPolicyClassName(RemoveOnEvictActionPolicy.class.getName());
return erc;
}
public void destroy() {
this.destroyed = true;
}
// this will be called by microcontainer.
public void stop() {
destroy();
}
@Override
public boolean isReplicated() {
return true;
}
}