Writing publish/subscribe applications

Start writing publish/subscribe IBM MQ applications.

For an overview of publish/subscribe concepts, see Publish/subscribe messaging.

See the following topics for information on writing different types of publish/subscribe applications:

Writing publisher applications
Get started with writing publisher applications by studying two examples. The first is modeled as closely as possible on a point to point application putting messages on a queue, and the second demonstrates creating topics dynamically - a more common pattern for publisher applications.
Writing subscriber applications
Get started with writing subscriber applications by studying three examples: an IBM MQ application consuming messages from a queue, an application that creates a subscription and requires no knowledge of queuing, and finally an example that uses both queuing and subscriptions.
Publish/subscribe lifecycles
Consider the lifecycles of topics, subscriptions, subscribers, publications, publishers and queues in designing publish/subscribe applications.
Publish/subscribe message properties
Several message properties relate to IBM MQ publish/subscribe messaging.
Message ordering
For a particular topic, messages are published by the queue manager in the same order as they are received from publishing applications (subject to reordering based on message priority).
Intercepting publications
We can intercept a publication, modify it, and then republish it before it reaches any other subscriber.
Publishing options
Several options are available that control the way messages are published.
Subscription options
Several options are available that control the way message subscriptions are handled.

Parent topic: Writing a procedural application for queuing