public void onMessage(Message message) {
try {
MapMessage request = (MapMessage) message;
String correlationID = request.getJMSCorrelationID();
int itemId = request.getInt("itemId");
// Retrieve the connection factory
connectionFactory =
(TopicConnectionFactory) initialContext.lookup(BeanConfig.TopicConnectionFactoryName);
// get the bids history
String html = getBidHistory(itemId);
// send the reply
TemporaryTopic temporaryTopic = (TemporaryTopic) request.getJMSReplyTo();
if (temporaryTopic != null) {
// create a connection
connection = connectionFactory.createTopicConnection();
// create a session: no transaction, auto ack
session = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
TextMessage reply = session.createTextMessage();
reply.setJMSCorrelationID(correlationID);
reply.setText(html);
replier = session.createPublisher(null); // unidentified publisher
connection.start();
replier.publish(temporaryTopic, reply);
replier.close();
session.close();
connection.stop();
connection.close();
}
} catch (Exception e) {
throw new EJBException("Message traitment failed for MDB_ViewBidHistory: " + e);
}
}
public void stop() {
try {
session.close();
} catch (JMSException e) {
e.printStackTrace();
}
try {
conn.close();
} catch (JMSException e) {
e.printStackTrace();
}
}
public static void drainTopic(TopicConnection cnn, String topic) throws Exception {
TopicSession session = cnn.createTopicSession(false, Session.DUPS_OK_ACKNOWLEDGE);
Topic t = session.createTopic(topic);
TopicSubscriber subscriber = session.createSubscriber(t);
Message msg = subscriber.receiveNoWait();
while (msg != null) {
try {
msg.acknowledge();
} catch (JMSException e) {
}
msg = subscriber.receiveNoWait();
}
subscriber.close();
session.close();
}
public static void topicPublish(
TopicConnection cnn,
String topicName,
String payload,
boolean transacted,
int ack,
String replyTo)
throws JMSException {
TopicSession session = cnn.createTopicSession(transacted, ack);
Topic topic = session.createTopic(topicName);
TopicPublisher publisher = session.createPublisher(topic);
TextMessage msg = session.createTextMessage();
msg.setText(payload);
msg.setJMSDeliveryMode(ack);
if (replyTo != null) {
msg.setJMSReplyTo(session.createTopic(replyTo));
}
publisher.publish(msg);
publisher.close();
session.close();
}
