Java Message Service

Richard Monson-Haefel
David A. Chappell
Publisher: O'Reilly
First Edition January 2001
ISBN: 0-596-00068-5, 238 pages
This book is a thorough introduction to Java Message Service (JMS) from Sun Microsystems. It shows how to build applications using the point-to-point and publish-andsubscribe models; use features like transactions and durable subscriptions to make applications reliable; and 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.

Preface ..............................................................................................................................1
What Is the Java Message Service?.................................................................................1
Who Should Read This Book?........................................................................................1
Organization...................................................................................................................2
Software and Versions ....................................................................................................3
Conventions ...................................................................................................................4
Comments and Questions ...............................................................................................4
Acknowledgments..........................................................................................................5
Chapter 1. Understanding the Messaging Paradigm ......................................................6
1.1 Enterprise Messaging................................................................................................7
1.2 The Java Message Service (JMS)..............................................................................9
1.3 Application Scenarios .............................................................................................11
1.4 RPC Versus Asynchronous Messaging ...................................................................15
Chapter 2. Developing a Simple Example .....................................................................19
2.1 The Chat Application..............................................................................................19
Chapter 3. Anatomy of a JMS Message.........................................................................33
3.1 Headers...................................................................................................................34
3.2 Properties................................................................................................................38
3.3 Message Selectors...................................................................................................40
3.4 Message Types .......................................................................................................42
Chapter 4. Publish-and-Subscribe Messaging...............................................................53
4.1 Getting Started with the B2B Application ...............................................................53
4.2 Temporary Topics...................................................................................................60
4.3 Durable Subscriptions.............................................................................................61
4.4 Publishing the Message Persistently........................................................................63
4.5 JMSCorrelationID...................................................................................................64
4.6 Request and Reply ..................................................................................................65
4.7 Unsubscribing.........................................................................................................68
Chapter 5. Point-to-Point Messaging.............................................................................69
5.1 Point-to-Point and Publish-and-Subscribe ...............................................................69
5.2 The QWholesaler and QRetailer..............................................................................71
5.3 Creating a Queue Dynamically ...............................................................................78
5.4 Load Balancing Using Multiple QueueSessions ......................................................79
5.5 Examining a Queue.................................................................................................80
Chapter 6. Guaranteed Messaging, Transactions, Acknowledgments & Failures ......84
6.1 Guaranteed Messaging ............................................................................................84
6.2 Message Acknowledgments....................................................................................85
6.3 Message Groups and Acknowledgment...................................................................91
6.4 Transacted Messages ..............................................................................................95
6.5 Lost Connections ..................................................................................................104
6.6 Dead Message Queues ..........................................................................................106
Chapter 7. Deployment Considerations.......................................................................108
7.1 Performance, Scalability, and Reliability ..............................................................108
7.2 To Multicast or Not to Multicast ...........................................................................112
7.3 Security ................................................................................................................116
7.4 Connecting to the Outside World ..........................................................................118
7.5 Bridging to Other Messaging Systems ..................................................................120
Chapter 8. J2EE, EJB, and JMS..................................................................................122
8.1 J2EE Overview .....................................................................................................122
8.2 J2EE: A United Platform ......................................................................................125
8.3 The JMS Resource in J2EE...................................................................................126
8.4 The New Message-Driven Bean in EJB 2.0...........................................................128
Chapter 9. JMS Providers............................................................................................133
9.1 IBM: MQSeries ....................................................................................................133
9.2 Progress: SonicMQ ...............................................................................................134
9.3 Fiorano: FioranoMQ .............................................................................................135
9.4 Softwired: iBus .....................................................................................................136
9.5 Sun Microsystems: Java Message Queue ..............................................................138
9.6 BEA: WebLogic Server ........................................................................................139
9.7 ExoLab: OpenJMS................................................................................................140
Appendix A. The Java Message Service API...............................................................141
A.1 Common Facilities ...............................................................................................141
A.2 Point-to-Point API ...............................................................................................150
A.3 Publish-and-Subscribe API ..................................................................................153
Appendix B. Message Headers.....................................................................................156
Appendix C. Message Properties .................................................................................167
C.1 Property Names....................................................................................................167
C.2 Property Values....................................................................................................167
C.3 Read-Only Properties ...........................................................................................169
C.4 Property Value Conversion ..................................................................................169
C.5 Nonexistent Properties .........................................................................................171
C.6 Property Iteration .................................................................................................171
C.7 JMS-Defined Properties .......................................................................................171
C.8 Provider-Specific Properties.................................................................................173
Appendix D. Message Selectors....................................................................................174
D.1 Identifiers ............................................................................................................174
D.2 Literals.................................................................................................................174
D.3 Comparison Operators .........................................................................................175
D.4 Arithmetic Operators............................................................................................177
D.5 Declaring a Message Selector ..............................................................................178
D.6 Not Delivered Semantics......................................................................................179
Colophon.......................................................................................................................180

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