How Messages are Processed From the WIS Process to the IAPJMS Process

A user application - either using iProcess Server Objects (Java) or iProcess Server Objects (.NET) - subscribes to a work queue, creating an initial connection to the published queue. The application specifies a JMS topic name and subscribes to that topic to start receiving JMS messages. If a topic is not specified at subscription time, the WQDJMS_TOPICNAME process attribute is used. For more information about this attribute and other related process attributes, see the TIBCO iProcess Engine Administrator’s Guide.

The first message sent is always a Work Queue Synchronization (DSY) Message. This informs the listening application that it now needs to begin processing other messages received from this work queue.

Note: The data passed in JMS messages may be restricted by other components of the system. For example, the maximum length of work queue parameter fields that can be published is limited by the WIS process: see the section "Using Work Queue Parameter Fields in Procedures" in the TIBCO iProcess Modeler - Advanced Design guide.

Messages are published to the IAPJMS process using a configurable port number (defined in the WQDJMS_PORTNO process attribute).