By Mark Hapner, Rich Burridge, Rahul Sharma, Joseph Fialli, Kim Haase
Offers an advent to the Java Message carrier (JMS) API for brand new clients. additionally introduces the JMS API to new clients, with easy JMS consumer software examples and indicates the right way to use the JMS API in the Java 2 Platform, firm version (J2EE)
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Extra info for Java Message Service API Tutorial and Reference
Other fields include a timestamp and a priority level. Each header field has associated setter and getter methods, which are documented in the description of the Message interface. Some header fields are intended to be set by a client, but many are set automatically by the send or the publish method, which overrides any client-set values. 2 Message Properties You can create and set properties for messages if you need values in addition to those provided by the header fields. 2 on page 29). 3 on page 108.
5 on page 44. Because both connection factories have the same name, you can run either the sender or the receiver on either system. ) You can run the pub/sub example in the same way by creating a Topicobject on both systems. For an example showing how to deploy J2EE applications on two different systems, see Chapter 10. 2 Communicating Between a J2EE Server and a System Not Running a J2EE Server In order for two standalone client programs to communicate, both must have the J2EE SDK installed locally.
The successful consumption of a message ordinarily takes place in three stages. 1. The client receives the message. 2. The client processes the message. 3. The message is acknowledged. Acknowledgment is initiated either by the JMS provider or by the client, depending on the session acknowledgment mode. 2 on page 70), acknowledgment happens automatically when a transaction is committed. If a transaction is rolled back, all consumed messages are redelivered. USING BASIC RELIABILITY MECHANISMS In nontransacted sessions, when and how a message is acknowledged depends on the value specified as the second argument of the createQueueSession or createTopicSession method.