Wild cards in topic mapping

This text describes the wild cards that can be used in topic mapping, and the differences between wild cards in the WebSphere® MQ link on a messaging engine in a service integration bus, and a broker in a WebSphere MQ network.

Topic mapping is defined on the broker profile, part of the publish/subscribe bridge on the WebSphere MQ link. It enables WebSphere Application Server applications to publish and subscribe with a message broker, for example IBM® WebSphere Business Integration Event Broker, in a WebSphere MQ network.

The IBM WebSphere Business Integration Event Broker uses wild cards # and +, which are represented as /. and * respectively in the service integration bus. However, the publish/subscribe bridge supports only the /. wild card, and only at the end of the topic. For example, stock//. in the service integration bus is equivalent to stock/# in the Event Broker, meaning all messages with "stock" at the beginning of the topic.

Wild cards defining topic mappings, which are entered on the WebSphere MQ link administrative console panels, must be entered using the publish/subscribe bridge symbols, not the Event Broker symbols. The conversion to Event Broker syntax wild cards is handled automatically by the publish/subscribe bridge.




Related concepts
Publishing and subscribing with a WebSphere MQ network
Related tasks
Defining topic mappings
Related reference
Topic names and use of wildcard characters in topic expressions
Concept topic Concept topic    

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Last updatedLast updated: Aug 31, 2013 12:02:36 AM CDT
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