/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.shindig.common.cache.ehcache;
import org.apache.shindig.common.cache.Cache;
import org.apache.shindig.common.cache.CacheProvider;
import org.apache.shindig.common.util.ResourceLoader;
import com.google.common.collect.MapMaker;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.config.Configuration;
import net.sf.ehcache.config.ConfigurationFactory;
import net.sf.ehcache.management.ManagementService;
import javax.management.MBeanServer;
import java.io.IOException;
import java.io.InputStream;
import java.lang.management.ManagementFactory;
import java.util.Map;
import java.util.logging.Logger;
public class EhCacheCacheProvider implements CacheProvider {
private final Logger LOG = Logger.getLogger(EhCacheCacheProvider.class.getName());
private final CacheManager cacheManager;
private final Map<String, Cache<?, ?>> caches = new MapMaker().makeMap();
@Inject
public EhCacheCacheProvider(@Named("shindig.cache.ehcache.config") String configPath,
@Named("shindig.cache.ehcache.jmx.enabled") boolean jmxEnabled,
@Named("shindig.cache.ehcache.jmx.stats") boolean withCacheStats)
throws IOException {
cacheManager = new CacheManager(getConfiguration(configPath));
create(jmxEnabled, withCacheStats);
}
/**
* Read the cache conifuration from the specified resource.
* This function is intended to be overrideable to allow for programmatic
* cache configuration.
* @param configPath
* @return Configuration
* @throws IOException
*/
protected Configuration getConfiguration(String configPath) throws IOException {
InputStream configStream = ResourceLoader.open(configPath);
return ConfigurationFactory.parseConfiguration(configStream);
}
public void create(boolean jmxEnabled, boolean withCacheStats) {
/*
* Add in a shutdown hook
*/
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
try {
shutdown();
} catch (Throwable t) {
// I really do want to swallow this, and make the shutdown clean for
// others
}
}
});
// register the cache manager with JMX
if (jmxEnabled) {
MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
ManagementService.registerMBeans(cacheManager, mBeanServer, true, true, true, withCacheStats);
}
}
/**
* perform a shutdown
*/
public void shutdown() {
cacheManager.shutdown();
}
@SuppressWarnings("unchecked")
public <K, V> Cache<K, V> createCache(String name) {
if (name == null) {
LOG.info("Creating anonymous cache");
return new EhConfiguredCache<K, V>(name, cacheManager);
} else {
Cache<K, V> cache = (Cache<K, V>) caches.get(name);
if (cache == null) {
LOG.info("Creating cache named " + name);
cache = new EhConfiguredCache<K, V>(name, cacheManager);
caches.put(name, cache);
}
return cache;
}
}
}