/*
* Copyright 2009 Red Hat, Inc.
* Red Hat 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.hornetq.javaee.example;
import java.util.Date;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.MessageConsumer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.naming.InitialContext;
import org.hornetq.javaee.example.server.XARecoveryExampleService;
/**
* An example which invokes an EJB. The EJB will be involved in a
* transaction with a "buggy" XAResource to crash the server.
* When the server is restarted, the recovery manager will recover the message
* so that the consumer can receive it.
*
* @author <a href="mailto:andy.taylor@jboss.org">Andy Taylor</a>
* @author <a href="mailto:jmesnil@redhat.com">Jeff Mesnil</a>
*/
public class XARecoveryExample
{
public static void main(final String[] args) throws Exception
{
InitialContext initialContext = null;
try
{
// Step 1. Obtain an Initial Context
initialContext = new InitialContext();
// Step 2. Lookup the EJB
XARecoveryExampleService service = (XARecoveryExampleService)initialContext.lookup("xarecovery-example/XARecoveryExampleBean/remote");
// Step 3. Invoke the send method. This will crash the server
String message = "This is a text message sent at " + new Date();
System.out.println("invoking the EJB service with text: " + message);
try
{
service.send(message);
}
catch (Exception e)
{
System.out.println("#########################");
System.out.println("The server crashed: " + e.getMessage());
System.out.println("#########################");
}
System.out.println("\n\n\nRestart the server by running 'ant restart' in a terminal");
// Step 4. We will try to receive a message. Once the server is restarted, the message
// will be recovered and the consumer will receive it
System.out.println("Waiting for the server to restart and recover before receiving a message");
boolean received = false;
while (!received)
{
try
{
Thread.sleep(15000);
XARecoveryExample.receiveMessage();
received = true;
}
catch (Exception e)
{
System.out.println(".");
}
}
}
finally
{
// Step 4. Be sure to close the resources!
if (initialContext != null)
{
initialContext.close();
}
}
}
private static void receiveMessage() throws Exception
{
InitialContext initialContext = null;
Connection connection = null;
try
{
// Step 1. Obtain an Initial Context
initialContext = new InitialContext();
// Step 2. Lookup the JMS connection factory
ConnectionFactory cf = (ConnectionFactory)initialContext.lookup("/ConnectionFactory");
// Step 3. Lookup the queue
Queue queue = (Queue)initialContext.lookup("queue/testQueue");
// Step 4. Create a connection, a session and a message consumer for the queue
connection = cf.createConnection();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageConsumer consumer = session.createConsumer(queue);
// Step 5. Start the connection
connection.start();
// Step 6. Receive the message sent by the EJB
System.out.println("\nwaiting to receive a message...");
TextMessage messageReceived = (TextMessage)consumer.receive(3600 * 1000);
System.out.format("Received message: %s \n\t(JMS MessageID: %s)\n",
messageReceived.getText(),
messageReceived.getJMSMessageID());
}
finally
{
// Step 7. Be sure to close the resources!
if (initialContext != null)
{
initialContext.close();
}
if (connection != null)
{
connection.close();
}
}
}
}