Subscribers

A subscriber is an application that requests information about a specified topic from a pub/sub broker. A pub/sub broker can be either an MQ pub/sub broker (queue manager) or an MQTT broker.

The subscribing application might be an IBM® Integration Bus, WebSphere® MQ, or MQTT client application.

The subscriber sends a subscription request to a pub/sub broker (MQTT or MQ), specifying which publications it wants to receive. The request defines the topic for each publication, and, for WebSphere MQ, it also defines the filter and the subscription point.

Messages that are published by a publisher can be received by more than one subscriber, and a subscriber can receive messages, on the same or different topics, from more than one publisher.

Subscription topics can also include wildcards, allowing them to match a range of related topics.