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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.qpid.example.jmsexample.requestResponse;
import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Properties;
/**
* The example creates a MessageConsumer on the specified
* Destination which is used to synchronously consume messages. If a
* received message has a ReplyTo header then a new response message is sent
* to that specified destination.
*/
public class Server
{
/* Used in log output. */
private static final String CLASS="Server";
/**
* Run the message mirror example.
*
* @param args Command line arguments.
*/
public static void main(String[] args)
{
Server server=new Server();
server.runTest();
}
/**
* Start the example.
*/
private void runTest()
{
try
{
// Load JNDI properties
Properties properties=new Properties();
properties.load(this.getClass().getResourceAsStream("requestResponse.properties"));
//Create the initial context
Context ctx=new InitialContext(properties);
// Lookup the connection factory
ConnectionFactory conFac=(ConnectionFactory) ctx.lookup("qpidConnectionfactory");
// create the connection
Connection connection=conFac.createConnection();
// As this application is using a MessageConsumer we need to set an ExceptionListener on the connection
// so that errors raised within the JMS client library can be reported to the application
System.out.println(
CLASS + ": Setting an ExceptionListener on the connection as sample uses a MessageConsumer");
connection.setExceptionListener(new ExceptionListener()
{
public void onException(JMSException jmse)
{
// The connection may have broken invoke reconnect code if available.
// The connection may have broken invoke reconnect code if available.
System.err.println(CLASS + ": The sample received an exception through the ExceptionListener");
System.exit(0);
}
});
// Create a session on the connection
// This session is a default choice of non-transacted and uses
// the auto acknowledge feature of a session.
System.out.println(CLASS + ": Creating a non-transacted, auto-acknowledged session");
Session session=connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
// Lookup the destination
Queue destination = (Queue) ctx.lookup("requestQueue");
// Create a MessageConsumer
System.out.println(CLASS + ": Creating a MessageConsumer");
MessageConsumer messageConsumer=session.createConsumer(destination);
/**
* Create a MessageProducer
*/
System.out.println(CLASS + ": Creating a MessageProducer");
MessageProducer messageProducer;
// Now the messageConsumer is set up we can start the connection
System.out.println(CLASS + ": Starting connection so MessageConsumer can receive messages");
connection.start();
// Cycle round until all the messages are consumed.
Message requestMessage;
TextMessage responseMessage;
boolean end=false;
while (!end)
{
System.out.println(CLASS + ": Receiving the message");
requestMessage=messageConsumer.receive();
String text;
if (requestMessage instanceof TextMessage)
{
text=((TextMessage) requestMessage).getText();
}
else
{
byte[] body=new byte[(int) ((BytesMessage) requestMessage).getBodyLength()];
((BytesMessage) requestMessage).readBytes(body);
text=new String(body);
}
// Now bounce the message if a ReplyTo header was set.
if (requestMessage.getJMSReplyTo() != null)
{
System.out.println(CLASS + ": Activating response queue listener");
responseMessage=session.createTextMessage();
responseMessage.setText(text.toUpperCase());
System.out.println(CLASS + ": \tResponse = " + responseMessage.getText());
messageProducer=session.createProducer(requestMessage.getJMSReplyTo());
messageProducer.send(responseMessage);
}
System.out.println();
}
// Close the connection to the server
System.out.println(CLASS + ": Closing connection");
connection.close();
// Close the JNDI reference
System.out.println(CLASS + ": Closing JNDI context");
ctx.close();
}
catch (Exception exp)
{
exp.printStackTrace();
System.err.println(CLASS + ": Caught an Exception: " + exp);
}
}
}
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