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The ActiveMQ Message Broker and Client implementations
/**
* 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.activemq.xbean;
import java.util.HashMap;
import org.apache.activemq.broker.BrokerService;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.io.Resource;
/**
* Used to share a single broker even if you have multiple broker bean
* definitions. A use case is where you have multiple web applications that want
* to start an embedded broker but only the first one to deploy should actually
* start it.
*
* @version $Revision$
*/
public class PooledBrokerFactoryBean implements FactoryBean, InitializingBean, DisposableBean {
static final HashMap SHARED_BROKER_MAP = new HashMap();
private boolean start;
private Resource config;
static class SharedBroker {
BrokerFactoryBean factory;
int refCount;
}
public void afterPropertiesSet() throws Exception {
synchronized (SHARED_BROKER_MAP) {
SharedBroker sharedBroker = SHARED_BROKER_MAP.get(config.getFilename());
if (sharedBroker == null) {
sharedBroker = new SharedBroker();
sharedBroker.factory = new BrokerFactoryBean();
sharedBroker.factory.setConfig(config);
sharedBroker.factory.setStart(start);
sharedBroker.factory.afterPropertiesSet();
SHARED_BROKER_MAP.put(config.getFilename(), sharedBroker);
}
sharedBroker.refCount++;
}
}
public void destroy() throws Exception {
synchronized (SHARED_BROKER_MAP) {
SharedBroker sharedBroker = SHARED_BROKER_MAP.get(config.getFilename());
if (sharedBroker != null) {
sharedBroker.refCount--;
if (sharedBroker.refCount == 0) {
sharedBroker.factory.destroy();
SHARED_BROKER_MAP.remove(config.getFilename());
}
}
}
}
public Resource getConfig() {
return config;
}
public Object getObject() throws Exception {
synchronized (SHARED_BROKER_MAP) {
SharedBroker sharedBroker = SHARED_BROKER_MAP.get(config.getFilename());
if (sharedBroker != null) {
return sharedBroker.factory.getObject();
}
}
return null;
}
public Class getObjectType() {
return BrokerService.class;
}
public boolean isSingleton() {
return true;
}
public boolean isStart() {
return start;
}
public void setConfig(Resource config) {
this.config = config;
}
public void setStart(boolean start) {
this.start = start;
}
}