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Details in Publisher-Subscriber pattern - Azure Architecture Center | Microsoft Learn |
Problem
Use asynchronous messaging to decouple senders from consumers and avoid blocking the sender to wait for a response.
Provide info to other components as events.
Solution
An event as a message that notifies other components about a change or an action that has taken place.
Workflow is based on an input channel and an output channel, one outpout channel per consumer and consumer is known as subscriber.
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Publisher-Subscriber In Practice
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Diagram shows an enterprise integration architecture that uses Service Bus to coordinate workflows, and Event Grid to notify subsystems of events that occur.