Queuing System Components and Tasks


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The following figure shows the components of the queued message facility.

Queued Service Invocation

The figure illustrates how each component of the queuing system operates for queued service invocation. In this discussion, we use the figure to explain how administrators and programmers work with the BEA Tuxedo /Q component to define it and use it to queue a message for processing and get back a reply. The queuing service may also be used for simple peer-to-peer communication by using a subset of the components shown in the figure.

A queue space is a resource. Access to the resource is provided by an X/OPEN XA-compliant resource manager interface. This interface is necessary so that enqueuing and dequeuing can be done as part of a two-phase committed transaction in coordination with other XA-compliant resource managers.