/*
* Copyright 2002-2009 the original author or authors.
*
* 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.
*/
package org.springframework.cache.ehcache;
import java.io.IOException;
import net.sf.ehcache.CacheException;
import net.sf.ehcache.CacheManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.io.Resource;
/**
* {@link FactoryBean} that exposes an EHCache {@link net.sf.ehcache.CacheManager}
* instance (independent or shared), configured from a specified config location.
*
* <p>If no config location is specified, a CacheManager will be configured from
* "ehcache.xml" in the root of the class path (that is, default EHCache initialization
* - as defined in the EHCache docs - will apply).
*
* <p>Setting up a separate EhCacheManagerFactoryBean is also advisable when using
* EhCacheFactoryBean, as it provides a (by default) independent CacheManager instance
* and cares for proper shutdown of the CacheManager. EhCacheManagerFactoryBean is
* also necessary for loading EHCache configuration from a non-default config location.
*
* <p>Note: As of Spring 3.0, Spring's EHCache support requires EHCache 1.3 or higher.
*
* @author Dmitriy Kopylenko
* @author Juergen Hoeller
* @since 1.1.1
* @see #setConfigLocation
* @see #setShared
* @see EhCacheFactoryBean
* @see net.sf.ehcache.CacheManager
*/
public class EhCacheManagerFactoryBean implements FactoryBean<CacheManager>, InitializingBean, DisposableBean {
protected final Log logger = LogFactory.getLog(getClass());
private Resource configLocation;
private boolean shared = false;
private String cacheManagerName;
private CacheManager cacheManager;
/**
* Set the location of the EHCache config file. A typical value is "/WEB-INF/ehcache.xml".
* <p>Default is "ehcache.xml" in the root of the class path, or if not found,
* "ehcache-failsafe.xml" in the EHCache jar (default EHCache initialization).
* @see net.sf.ehcache.CacheManager#create(java.io.InputStream)
* @see net.sf.ehcache.CacheManager#CacheManager(java.io.InputStream)
*/
public void setConfigLocation(Resource configLocation) {
this.configLocation = configLocation;
}
/**
* Set whether the EHCache CacheManager should be shared (as a singleton at the VM level)
* or independent (typically local within the application). Default is "false", creating
* an independent instance.
* @see net.sf.ehcache.CacheManager#create()
* @see net.sf.ehcache.CacheManager#CacheManager()
*/
public void setShared(boolean shared) {
this.shared = shared;
}
/**
* Set the name of the EHCache CacheManager (if a specific name is desired).
* @see net.sf.ehcache.CacheManager#setName(String)
*/
public void setCacheManagerName(String cacheManagerName) {
this.cacheManagerName = cacheManagerName;
}
public void afterPropertiesSet() throws IOException, CacheException {
logger.info("Initializing EHCache CacheManager");
if (this.shared) {
// Shared CacheManager singleton at the VM level.
if (this.configLocation != null) {
this.cacheManager = CacheManager.create(this.configLocation.getInputStream());
}
else {
this.cacheManager = CacheManager.create();
}
}
else {
// Independent CacheManager instance (the default).
if (this.configLocation != null) {
this.cacheManager = new CacheManager(this.configLocation.getInputStream());
}
else {
this.cacheManager = new CacheManager();
}
}
if (this.cacheManagerName != null) {
this.cacheManager.setName(this.cacheManagerName);
}
}
public CacheManager getObject() {
return this.cacheManager;
}
public Class<? extends CacheManager> getObjectType() {
return (this.cacheManager != null ? this.cacheManager.getClass() : CacheManager.class);
}
public boolean isSingleton() {
return true;
}
public void destroy() {
logger.info("Shutting down EHCache CacheManager");
this.cacheManager.shutdown();
}
}
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