WebSphere WebSphere Application Server Express, Version 6.0.x Operating Systems: AIX, HP-UX, Linux, Solaris, Windows

Messaging between two WebSphere Application Servers through WebSphere MQ

This topic describes the concept of sending a message to another WebSphere Application Server through a WebSphere MQ network.

You can exchange messages between two WebSphere Application Servers through an intermediate WebSphere MQ system, as shown in the figure below.
Figure 1. Exchanging messages between two WebSphere Application Servers through an intermediate WebSphere MQ network.
The graphic illustrates a WebSphere Application Server (on the left), linked to a WebSphere MQ system (in the middle), linked to a WebSphere Application Server (on the right).

Although there are differences between WebSphere Application Server and WebSphere MQ, the WebSphere Application Server has the WebSphere MQ link which automatically takes care of most message conversion (of course, data conversion is under your control). A message arriving at a target WebSphere Application Server will be the same as that leaving the transmitting WebSphere Application Server, despite its conversion from WebSphere Application Server to WebSphere MQ and back to WebSphere Application Server format.

WebSphere MQ request messages contain a single reply-to queue name to which a receiving application can send responses. The service integration bus has a more advanced reply path (not just a single queue name). You can use reply-to queues for point-to-point messages (queues) and for topics.

Messages with topic style reply-to destinations must have the appropriate publish/subscribe bridge topic mappings defined in the relevant direction in order for reply messages to be transferred between a WebSphere MQ network and WebSphere Application Server. This is not automatic as it is for messages with queue reply destinations.


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Last updated: 2 Aug 2005
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