/*
* Copyright 2003,2004 Colin Crist
*
* 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 hermes.impl.jms;
import hermes.Hermes;
import hermes.HermesException;
import hermes.impl.ConnectionManager;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import org.apache.log4j.Category;
/**
* Manager for a shared JMS Connection for all threads
*
* @author colincrist@hermesjms.com
* @version $Id: ConnectionSharedManager.java,v 1.1 2004/07/21 20:25:40
* colincrist Exp $
*/
public class ConnectionSharedManager extends ConnectionManagerSupport implements ConnectionManager
{
private static final Category cat = Category.getInstance(ConnectionSharedManager.class);
private Connection connection;
/**
* ConnectionSharedManager constructor.
*/
public ConnectionSharedManager()
{
super();
}
public void reconnect(String username, String password) throws JMSException
{
ConnectionFactory connectionFactory = (ConnectionFactory) parent.getObject();
if (connectionFactory == null)
{
throw new HermesException("No ConnectionFactory has been created for this provider");
}
try
{
if (connection != null)
{
connection.close();
connection = null;
}
}
catch (JMSException ex)
{
cat.warn("previous connection throw exception during close: " + ex.getMessage());
}
cat.debug("creating connection from factory: " + parent);
if (username != null)
{
connection = createConnection(username, password);
}
else
{
connection = createConnection() ;
}
}
/**
* Connect with try and create the connection, if one exists it will be
* closed.
*/
public void connect() throws JMSException
{
reconnect(null, null) ;
}
/**
* Get the connection, connecting as necesary
*/
public Connection getConnection() throws JMSException
{
synchronized (this)
{
if (connection == null)
{
connect();
}
}
return connection;
}
public void close() throws JMSException
{
synchronized (this)
{
if (connection != null)
{
Connection tmpConnection = connection;
if (System.getProperty("hermes.dontCloseConnections") == null)
{
try
{
connection = null;
tmpConnection.close();
getConnectionFactoryManager().close();
}
finally
{
Hermes.events.notifyDisconnected(getHermes());
}
}
}
}
}
/**
* Get the managed object, in this case the JMS Connection.
*/
public Object getObject() throws JMSException
{
return getConnection();
}
public Policy getType()
{
return Policy.SHARED_CONNECTION;
}
}