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WSO2 MB provides creation of hierarchical topics where users can add a child level topic under an existing topic in the hierarchy. With hierarchical topics the users have the choice of selecting whether they need to subscribe into a parent topic or some of the selected child topics under it.
There are two types of hierarchical topic subscriptions patterns supported by WSO2 MB. Using ' <TopicName>.* ' option will subscribe to the immediate child elements of the parent <TopicName> and the '<TopicName>.# ' option will be subscribing to both parent <TopicName> as well as to all the child topics under the parent.
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Install and run the WSO2 Message Broker using the instructions in section Installation Guide.
Create subscriptions to available hierarchical topic patterns
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