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Integrating With the Native 4GL Publish-and-Subscribe Mechanism
The JMS Pub/Sub model complements the Progress 4GL syntax for publish and subscribe (named events) for distributed applications. As shown in a Figure 13–3, 4GL programmers can write an application using the local Progress 4GL syntax for publish and subscribe and then make the local application distributed by adding local and remote gateway object modules. Using this model, a 4GL programmer can integrate the local application with the SonicMQ functionality without recompiling. Progress recommends this model, but does not provide specific software to implement it, except for the sample application files. (See the section "Gateway Sample Application" in Using the SonicMQ Adapter.")
Figure 13–3: The Gateway Model
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