Java Message Service

This book is a thorough introduction to Java Message Service (JMS), the standard Java application program interface (API) from Sun Microsystems that supports the formal communication known as "messaging" between computers in a network. JMS provides a common interface to standard messaging protocols and to special messaging services in support of Java programs. The messages exchange crucial data between computers, rather than between users--information such as event notification and service requests. Messaging is often used to coordinate programs in dissimilar systems or written in different programming languages.

Using the JMS interface, a programmer can invoke the messaging services of IBMs MQSeries, Progress Softwares SonicMQ, and other popular messaging product vendors. In addition, JMS supports messages that contain serialized Java objects and messages that contain Extensible Markup Language (XML) pages.

Messaging is a powerful new paradigm that makes it easier to uncouple different parts of an enterprise application. Messaging clients work by sending messages to a message server, which is responsible for delivering the messages to their destination. Message delivery is asynchronous, meaning that the client can continue working without waiting for the message to be delivered. The contents of the message can be anything from a simple text string to a serialized Java object or an XML document.

Java Message Service shows how to build applications using the point-to-point and publish-and-subscribe models; how to use features like transactions and durable subscriptions to make an application reliable; and how to use messaging within Enterprise JavaBeans. It also introduces a new EJB type, the MessageDrivenBean, that is part of EJB 2.0, and discusses integration of messaging into J2EE.

About the Authors
Richard Monson-Haefel is the author of Enterprise JavaBeans, 3rd Edition, Java Message Service and one of the worlds leading experts and book authors on Enterprise Java. He is the lead architect of OpenEJB, an open source EJB container used in Apple Computers WebObjects plateform, and has consulted as an architect on J2EE, CORBA, Java RMI and other distributed computing projects over the past several years.

Dave Chappell is vice president and chief technology evangelist for Sonic Software. Dave has over 20 years of experience in the software industry covering a broad range of roles including R&D, code-slinger, sales, support and marketing. He has a strongpassion for shaping the future of technology, and enjoys sharing his knowledge and experience with others. Dave is well known for his writings and publiclectures on the subjects of the Enterprise Service Bus (ESB), Message OrientedMiddleware (MOM), enterprise integration, and evolving standards for Web services. As Director of Engineering for Sonic Software, Chappell led thedevelopment effort for SonicMQ, which has grown to become synonymous withenterprise messaging and the Java Message Service (JMS). He has extensiveexperience in distributed computing, including JMS and MOM, CORBA, COM, EJB andWeb application server infrastructure. Daves experience also includesdevelopment of client/server infrastructure, graphical user interfaces, andlanguage interpreters.

Chappell is noted for authoring the popular OReilly books on enterprise messaging and Web services, and serves as technical editor for Web Services Journal. Most recently, Chappellwas honored by the editors of JavaPro for "Outstanding Contribution to the Java Community by an Individual".