Sams Teach Yourself J2EE™ in 21 Days, Second Edition

Publish/Subscribe Messaging Example

Now, you will build a simple bulletin board application. For this example, the bulletin board publisher program will generate 10 simple messages. The subscriber will be a Swing application that will display the messages as they arrive.

The bulletin board uses a topic called jms/bulletinBoard created along with the other JMS resources at the start of today's examples.

Bulletin Board Publisher

The same mechanism is used to create a topic as you used to create a queue, so Listing 9.4 should appear very similar to the previous point-to-point sender example.

Listing 9.4. Bulletin Board Publisher BBPublisher.java

import javax.jms.*; public class BBPublisher { private Connection connection; private Session session; ...