About Service MQ rules
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Purpose

Use a package of Service MQ rules to let external systems and users access PRPC data and processing using the IBM WebSphere MQ middleware messaging standard. Each Service MQ rule identifies an activity providing the service. The external system passes an MQ message to PRPC, which runs the activity and then may return an output MQ message.

When PRPC is deployed as an enterprise application, you must use a message-driven bean (MDB) as the listener for message-based service rules (JMS and MQ). As a result, although you can use WebSphere MQ as a JMS service provider, use JMS MDB listeners with JMS service rules, rather than MQ listeners with MQ service rules, when PRPC is deployed as an enterprise application.

MQ services generally process service requests synchronously. That is, they immediately perform the requested processing and return a configured response while the calling application waits. However, you can configure MQ services to process service requests asynchronously, which means the service queues the request for asynchronous execution and the calling application calls back later for the results. Additionally, you can configure synchronous MQ services to check for specific error conditions that you expect will be temporary — work item locks, for example — and then queue service requests that fail for those reasons for another attempt at a later time.

For information about creating MQ services, PDN articles 25074 Using the Service Accelerator. See also:

• 25029 How asynchronous service processing works
• 25030 How to create a service that processes requests asynchronously
• 25031 How to create a service that queues failed service requests for another attempt

Access

Use the Application Explorer to see Service MQ rules in your application. Use the Rules Explorer to list all Service MQ rules that are available to you.

Category

Service MQ rules belong to the Integration-Services category. A Service MQ rule is an instance of the Rule-Service-MQ rule type.

	message-driven bean
	Unit testing a Service MQ rule
	Atlas — Standard Service MQ rules

Integration-Services category
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