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PowerBuilder® 9: Internet and Distributed Application Development by John D. Olson, Bill Green

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Using Message Service

EAServer's message service provides a powerful means by which to leverage multiple threads in your distributed applications. The message service is a full-messaging implementation of the Java Message Service (JMS), which allows synchronous and asynchronous messaging to clients and listener components. Listener components are registered to listen for certain messages and act on the data contained in the message. The listener can be a component in EAServer or a Java client outside of EAServer. For example, a chat window could register with the message service for a particular message topic. All messages posted to that topic would be sent to the registered Java clients or listener components. This section will not attempt to ...

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