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JBoss AS 5 Development
The medium is the message. – Marshall McLuhan
Messaging is a method of communication between software components or applications. The Java Message Service (JMS) is a Java API designed by Sun that allows applications to create, send, receive, and read messages (refer to http://java.sun.com/products/jms/docs.html).
Messaging differs from other standard protocols, such as Remote Method Invocation (RMI) and Hypertext Transfer Protocol (HTTP), in two ways. Firstly, the conversation is mediated by a messaging server, so it's not a two-way conversation between peers. Secondly, the sender and receiver need to know only the message format and the destination to be used. This is in contrast to tightly coupled technologies such as RMI, which requires an application to know a remote application's methods.
In this chapter, we will cover:
A brief introduction to message-oriented systems
The new JBoss Messaging system that replaces the earlier...
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