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package org.apache.tuscany.binding.jms;
import java.util.Properties;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class SimpleJMSResourceFactory implements JMSResourceFactory {
private JMSBinding jmsBinding;
private Connection con;
private Context context;
private boolean isConnectionStarted;
public SimpleJMSResourceFactory(JMSBinding 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();
}
}
/* (non-Javadoc)
* @see org.apache.tuscany.binding.jms.JMSResourceFactory#createTextMessage(javax.jms.Session)
*/
public Message createMessage(Session session) throws JMSException{
javax.jms.Message message = session.createTextMessage(); // default
message.setJMSDeliveryMode(jmsBinding.getDeliveryMode());
message.setJMSPriority(jmsBinding.getPriority());
return message;
}
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());
props.setProperty(Context.PROVIDER_URL,jmsBinding.getJNDIProviderURL());
context = new InitialContext(props);
}
}
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