Today, you have had an introduction to JMS messaging, the concept of message producers and consumers, and explored the two supported message domains—point-to-point and publish/subscribe. This has necessarily been an overview of JMS. More information should be obtained from the latest JMS specification and API. Also, refer to the documentation for your JMS provider to determine what features beyond those described here are supported.
You have also been given a brief introduction to XML and seen how it can be used to communicate with other applications.
Tomorrow, you will utilize your JMS knowledge gained today while examining the third type of EJB—Message-driven beans.