Microsoft Azure Development Cookbook Second Edition

Implementing publish/subscribe with Service Bus topics

Messaging systems are implemented in hundreds of different technologies, but often they implement mainly two patterns: queue-based and publish/subscribe. The first, which is the main character of this chapter, stands on the concept of a single queue in which someone (one or many) sends a message and someone (and only one) receives the message to process and delete it.

Queue-based messaging is often implemented with a FIFO (First-In-First-Out) pattern and sometimes ordering is guaranteed (for example, in the Service Bus). On the other hand, there is the publish/subscribe messaging pattern that is the key component in many interconnected enterprise systems, known in the Service Bus as the Topic ...