O'Reilly - Java Message Service

import javax.jms.TopicConnectionFactory;
import javax.jms.QueueConnectionFactory;
import javax.jms.Topic;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.StreamMessage;
import javax.jms.TextMessage;
public class QRetailer implements javax.jms.MessageListener {
private javax.jms.QueueConnection qConnect = null;
private javax.jms.QueueSession qSession = null;
private javax.jms.QueueSender qSender = null;
private javax.jms.TopicConnection tConnect = null;
private javax.jms.TopicSession tSession = null;
private javax.jms.Topic hotDealsTopic = null;
private javax.jms.TopicSubscriber tsubscriber = null;
private static boolean useJNDI = false;
private static String uname = null;
public QRetailer( String broker, String username, String password){
try {
TopicConnectionFactory tFactory = null;
QueueConnectionFactory qFactory = null;
InitialContext jndi = null;
uname = username;
Properties env = new Properties( );
// ... specify the JNDI properties specific to the vendor
jndi = new InitialContext(env);
tFactory =
(TopicConnectionFactory)jndi.lookup(broker);
qFactory =
(QueueConnectionFactory)jndi.lookup(broker);
tConnect =
tFactory.createTopicConnection (username, password);
qConnect =
qFactory.createQueueConnection (username, password);
tConnect.setClientID(username);
qConnect.setClientID(username);
tSession =
tConnect.createTopicSession(false,
Session.AUTO_ACKNOWLEDGE);
qSession =
qConnect.createQueueSession(false,
javax.jms.Session.AUTO_ACKNOWLEDGE);
hotDealsTopic = (Topic)jndi.lookup("Hot Deals");
tsubscriber =
tSession.createDurableSubscriber(hotDealsTopic,
"Hot Deals Subscription");
tsubscriber.setMessageListener(this);
tConnect.start( );
} catch (javax.jms.JMSException jmse){
jmse.printStackTrace( );
System.exit(1);
} catch (javax.naming.NamingException jne){
jne.printStackTrace( ); System.exit(1);
}
}
public void onMessage(javax.jms.Message aMessage){
try {
autoBuy(aMessage);
Java Message Service
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