The WebSphere® MQ messaging provider uses your WebSphere MQ system as the provider. The WebSphere MQ messaging provider supports the JCA Resource Adapter (RA) mechanism. When you install a message-driven bean application you provide an activation specification.
The following figure illustrates the messaging flow for JCA message-driven beans that use WebSphere MQ as the messaging provider.
The z/OS® WebSphere Application Server uses a two-part RA that supports “split” message-driven processing. The RA has a listener component which runs in the control region adjunct (CRA) and a dispatcher component which runs in each servant region (SR). The RA dispatcher component drives the application code. For some workloads, WebSphere Application Server can drive workload management directly from the CRA.
Optimization can allow the WebSphere MQ RA listener to invoke z/OS WLM directly, bypassing the SR aggregator processing in the CR.