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/*
* 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.tuscany.binding.jms;
import java.util.Properties;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Session;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class SimpleJMSResourceFactory implements JMSResourceFactory {
private JMSBindingDefinition jmsBinding;
private Connection con;
private Context context;
private boolean isConnectionStarted;
public SimpleJMSResourceFactory(JMSBindingDefinition jmsBinding) {
this.jmsBinding = jmsBinding;
}
/*
* This is a simple implementation where a connection is created per binding
* Ideally the resource factory should be able to leverage the host
* environment to provide connection pooling if it can. For ex If Tuscany is
* running inside an AppServer Then we could leverage the JMS resources it
* provides
*
* @see org.apache.tuscany.binding.jms.JMSResourceFactory#getConnection()
*/
public Connection getConnection() throws NamingException, JMSException {
if (con == null) {
createConnection();
}
return con;
}
/*
* (non-Javadoc)
*
* @see org.apache.tuscany.binding.jms.JMSResourceFactory#createSession()
*/
public Session createSession() throws JMSException, NamingException {
return getConnection().createSession(false, Session.AUTO_ACKNOWLEDGE);
}
/*
* (non-Javadoc)
*
* @see org.apache.tuscany.binding.jms.JMSResourceFactory#startConnection()
*/
public void startConnection() throws JMSException, NamingException {
if (!isConnectionStarted) {
getConnection().start();
isConnectionStarted = true;
}
}
/*
* (non-Javadoc)
*
* @see org.apache.tuscany.binding.jms.JMSResourceFactory#closeConnection()
*/
public void closeConnection() throws JMSException, NamingException {
if (con != null) {
con.close();
}
}
private void createConnection() throws NamingException, JMSException {
if (context == null) {
createInitialContext();
}
ConnectionFactory conFac = (ConnectionFactory)context.lookup(jmsBinding.getConnectionFactoryName());
con = conFac.createConnection();
}
private void createInitialContext() throws NamingException {
Properties props = new Properties();
props.setProperty(Context.INITIAL_CONTEXT_FACTORY, jmsBinding.getInitialContextFactoryName().trim());
props.setProperty(Context.PROVIDER_URL, jmsBinding.getJNDIProviderURL().trim());
context = new InitialContext(props);
}
public Destination lookupDestination(String jndiName) throws NamingException {
if (context == null) {
createInitialContext();
}
return (Destination)context.lookup(jndiName);
}
}
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