/**
* 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.pool;
import javax.jms.JMSException;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQSession;
import org.apache.activemq.AlreadyClosedException;
import org.apache.activemq.util.JMSExceptionSupport;
import org.apache.commons.pool.ObjectPool;
import org.apache.commons.pool.PoolableObjectFactory;
/**
* Represents the session pool for a given JMS connection.
*
* @version $Revision: 1.1 $
*/
public class SessionPool implements PoolableObjectFactory {
private ConnectionPool connectionPool;
private SessionKey key;
private ObjectPool sessionPool;
public SessionPool(ConnectionPool connectionPool, SessionKey key, ObjectPool sessionPool) {
this.connectionPool = connectionPool;
this.key = key;
this.sessionPool = sessionPool;
sessionPool.setFactory(this);
}
public void close() throws Exception {
if (sessionPool != null) {
sessionPool.close();
}
sessionPool = null;
}
public PooledSession borrowSession() throws JMSException {
try {
Object object = getSessionPool().borrowObject();
return (PooledSession)object;
} catch (JMSException e) {
throw e;
} catch (Exception e) {
throw JMSExceptionSupport.create(e);
}
}
public void returnSession(PooledSession session) throws JMSException {
// lets check if we are already closed
getConnection();
try {
getSessionPool().returnObject(session);
} catch (Exception e) {
throw JMSExceptionSupport.create("Failed to return session to pool: " + e, e);
}
}
// PoolableObjectFactory methods
// -------------------------------------------------------------------------
public Object makeObject() throws Exception {
return new PooledSession(createSession(), this);
}
public void destroyObject(Object o) throws Exception {
PooledSession session = (PooledSession)o;
session.getSession().close();
}
public boolean validateObject(Object o) {
return true;
}
public void activateObject(Object o) throws Exception {
}
public void passivateObject(Object o) throws Exception {
}
// Implemention methods
// -------------------------------------------------------------------------
protected ObjectPool getSessionPool() throws AlreadyClosedException {
if (sessionPool == null) {
throw new AlreadyClosedException();
}
return sessionPool;
}
protected ActiveMQConnection getConnection() throws JMSException {
return connectionPool.getConnection();
}
protected ActiveMQSession createSession() throws JMSException {
return (ActiveMQSession)getConnection().createSession(key.isTransacted(), key.getAckMode());
}
}