O'Reilly - Java Message Service

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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
Preface What Is the Java Message Service? Java Message Service When Java was first introduced, most of the IT industry focused on its graphical user interface characteristics and the competitive advantage it offered in terms of distribution and platform independence. Today, the focus has broadened considerably: Java has been recognized as an excellent platform for creating enterprise solutions, specifically for developing distributed server-side applications. This shift has much to do with Java's emerging role as a universal language for producing implementation-independent abstractions for common enterprise technologies. The JDBC API is the first and most familiar example. JDBC provides a vendor-independent Java interface for accessing SQL relational databases. This abstraction has been so successful that it's difficult to find a relational database vendor that doesn't support JDBC. Java abstractions for enterprise technologies have expanded considerably to include JNDI (Java Naming and Directory Interface) for abstracting directory services, JMX (Java Management Extensions) for abstracting access to computer devices on a network, and JMS (Java Message Service) for abstracting access to different Message-Oriented Middleware products. JMS has quickly become a de facto industry standard. In its second version, most enterprise messaging vendors now support the JMS specification, making for a large selection of JMS providers to choose from. The Java Message Service is a Java API implemented by enterprise messaging vendors to provide Java applications with a common and elegant programming model that is portable across messaging systems. Enterprise messaging systems are used to send notification of events and data between software applications. There are two common programming models supported by the JMS API: publish-and-subscribe and point-to-point. Each model provides benefits and either or both may be implemented by JMS providers. JMS and enterprise messaging systems provide Java developers with an asynchronous messaging system that allows systems to interact without requiring them to be tightly coupled. Messages can be delivered to systems that are not currently running and processed when it's convenient. The decoupled, asynchronous characteristics of enterprise messaging make JMS an extremely powerful and critical enterprise API. JMS is used by Java developers in Enterprise Application Integration, Business-to-Business (B2B) projects, and distributed computing in general. As JMS quickly moves into the forefront as one of the most important J2EE technologies, understanding how JMS works and when to use it will become the hallmark of the most successful distributed computing professionals. Choosing to read this book to learn about JMS may be one of the smartest career moves you ever make. Who Should Read This Book? This book explains and demonstrates the fundamentals of the Java Message Service. This book provides a straightforward, no-nonsense explanation of the underlying technology, Java classes and interfaces, programming models, and various implemenations of the JMS specification. 1
Page 2 and 3: Java Message Service Richard Monson
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Page 12 and 13: Java Message Service Before we disc
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Java Message Service Essentially, M
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3.4.9 Interoperability and Portabil
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4.1.1 Running the B2B Application J
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jne.printStackTrace( ); System.exit
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try { Properties env = new Properti
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Java Message Service Once the Retai
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Java Message Service We can demonst
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Java Message Service publish( ) met
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Java Message Service The receive( )
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4.7 Unsubscribing Java Message Serv
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Java Message Service multiple consu
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import javax.jms.TopicConnectionFac
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} } try { System.out.println("\nRet
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TopicConnectionFactory tFactory = n
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public QWholesaler(String broker, S
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Java Message Service have already p
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} if (message != null){ int orderQt
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Java Message Service Chapter 6. Gua
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6.2.1 AUTO_ACKNOWLEDGE Java Message
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Java Message Service via publish-an
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Java Message Service message. If th
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Java Message Service QWholesaler an
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Java Message Service avoids process
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Figure 6.8. Transactional messages
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Java Message Service uses a JMS tra
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} return; session.commit(); } else
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Else, commit (that's what just happ
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XAResource jmsXA = session.getXARes
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... } { try { Thread.sleep(10000);
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Chapter 7. Deployment Consideration
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Java Message Service A vendor may h
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Java Message Service that your memo
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Java Message Service only really vi
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7.2.5 The Bottom Line Java Message
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Java Message Service There are two
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Java Message Service Figure 7.2. Us
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Chapter 8. J2EE, EJB, and JMS 8.1 J
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Java Message Service JNDI ENC. In a
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8.3 The JMS Resource in J2EE Java M
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Java Message Service Although sessi
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Figure 8.3. Lifecycle of a message-
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Java Message Service With the messa
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Java Message Service It's also supp
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Java Message Service The FioranoMQ
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Java Message Service The iBus//Mobi
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9.6.2 Next Version Java Message Ser
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A.1.2 Connection Java Message Servi
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A.1.8 JMSException Java Message Ser
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} public void setInt(String name, i
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} public Message receiveNoWait( ) t
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} public void writeInt(int value) t
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A.2.6 QueueSender Java Message Serv
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} throws JMSException; public Conne
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Appendix B. Message Headers Java Me
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Java Message Service are delivered
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Java Message Service JMSTimestamp P
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UTC Java Message Service UTC (Unive
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Java Message Service JMSReplyTo Pur
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Java Message Service JMSType Purpos
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} public void setByteProperty(Strin
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Java Message Service Each of the ac
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JMSXAppID Java Message Service This
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Appendix D. Message Selectors Java
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The BETWEEN operator can be used to
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D.5 Declaring a Message Selector Ja
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Colophon Java Message Service Our l
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O'Reilly - Java Message Service

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