About Service JMS rules

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Purpose

C-485 03-04 The JMS integration interface supports interactions between your Process Commander application and other systems through the Java Message Service (JMS). Process Commander supports JMS through both services and connectors. JMS services can receive (consume) messages from a JMS topic or queue and produce responses to those messages.

This facility supports both point-to-point and publish/subscribe messaging models. It supports durable subscriptions, automatic acknowledgment, and, if Process Commander is deployed as an enterprise application, transaction-based processing.

To provide a JMS service, your Process Commander system must be able to function as a JMS client. So if Process Commander is deployed on a non-J2EE application server like Apache Tomcat, follow the vendor's documentation for that application server and configure the Process Commander system as a JMS client. BURND 7/18/06

JMS services generally process service requests synchronously. That is, they immediately perform their requested processing and return a configured response while the calling application waits. However, you can configure JMS 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 JMS services to check for specific error conditions that you expect will be temporary — work object locks, for example — and then queue service requests that fail for those reasons for another attempt at a later time.

Access

Use the Application Explorer or the Integration Overview landing page to see Service JMS rules in your application. Use the Rules Explorer to list all Service JMS rules that are available to you. To access the Integration Overview landing page, select > Integration > Overview.

Development

For a description of the development process, see the following Pega Developer Network articles:

• PRKB-25079 How to set up a JMS service
• PRKB-25074 Using the Service Accelerator
• PRKB-25029 How asynchronous service processing works
• PRKB-25030 How to create a service that processes requests asynchronously
• PRKB-25031 How to create a service that queues failed service requests for another attempt

Category

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

	How to unit test a Service JMS rule
	Atlas — Standard Service JMS rules

Integration-Services category
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