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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.sca.binding.jms.provider;
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;
import org.apache.tuscany.sca.binding.jms.impl.JMSBindingException;
/**
* Abstracts away any JMS provide specific feature from the JMS binding
*
* @version $Rev$ $Date$
*/
public class JMSResourceFactory {
private String initialContextFactoryName;
private String connectionFactoryName = "ConnectionFactory";
private String jndiURL;
private Connection connection;
private Context context;
private boolean isConnectionStarted;
public JMSResourceFactory(String connectionFactoryName, String initialContextFactoryName, String jndiURL) {
if (connectionFactoryName != null && connectionFactoryName.trim().length() > 0) {
this.connectionFactoryName = connectionFactoryName.trim();
}
if (initialContextFactoryName != null && initialContextFactoryName.trim().length() > 0) {
this.initialContextFactoryName = initialContextFactoryName.trim();
}
if (jndiURL != null) {
this.jndiURL = jndiURL.trim();
}
}
/*
* 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. E.g. 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 (connection == null) {
createConnection();
}
return connection;
}
/*
* (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 {
if (connection != null) {
connection.close();
}
}
private void createConnection() throws NamingException, JMSException {
ConnectionFactory connectionFactory = (ConnectionFactory)jndiLookUp(connectionFactoryName);
if (connectionFactory == null) {
throw new JMSBindingException("connection factory not found: " + connectionFactoryName);
}
connection = connectionFactory.createConnection();
}
private synchronized Context getInitialContext() throws NamingException {
if (context == null) {
Properties props = new Properties();
if (initialContextFactoryName != null) {
props.setProperty(Context.INITIAL_CONTEXT_FACTORY, initialContextFactoryName);
}
if (jndiURL != null) {
props.setProperty(Context.PROVIDER_URL, jndiURL);
}
initJREEnvironment(props);
context = new InitialContext(props);
}
return context;
}
/**
* If using the WAS JMS Client with a non-IBM JRE then an additional
* environment property needs to be set to initialize the ORB correctly.
* See: http://www-1.ibm.com/support/docview.wss?uid=swg24012804
*/
private void initJREEnvironment(Properties props) {
if (props.get(Context.INITIAL_CONTEXT_FACTORY).equals("com.ibm.websphere.naming.WsnInitialContextFactory")) {
String vendor = System.getProperty("java.vendor");
if (vendor == null || !vendor.contains("IBM")) {
props.setProperty("com.ibm.CORBA.ORBInit","com.ibm.ws.sib.client.ORB");
}
}
}
public Destination lookupDestination(String jndiName) throws NamingException {
return (Destination)jndiLookUp(jndiName);
}
/**
* You can create a destination in ActiveMQ (and have it appear in JNDI) by putting "dynamicQueues/" in front of the
* queue name being looked up
*/
public Destination createDestination(String jndiName) throws NamingException {
return lookupDestination("dynamicQueues/" + jndiName);
}
protected Object jndiLookUp(String name) {
Object o = null;
try {
o = getInitialContext().lookup("java:comp/env/" + name);
} catch (NamingException ex) {
// ignore
}
if (o == null) {
try {
o = getInitialContext().lookup(name);
} catch (NamingException ex) {
ex.printStackTrace();
// ignore
}
}
return o;
}
}
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