c# - How does Azure Service Bus queue subscription can affect in IIS application idle state?

Question

I have a scenario where there are many .NET Web APIs hosted in one IIS. It's one application per customer.

I need to implement user notifications features. Which consists in one message publisher system, and many receivers that are those applications hosted in the IIS. And I'm thinking about using Azure Service Bus to make communications between the publisher system and the receivers.

The thing that makes me confused is that those applications running in IIS are Web APIs and they enter in Idle state after a while without activity. That's intended as it allows us to save resources. But i don't know if subscribing to a queue will make the applications not to enter the Idle state. Or if they enter the Idle state and when they receive messages, they'll all at the same time get out of the idle state.

question from:https://stackoverflow.com/questions/65934893/how-does-azure-service-bus-queue-subscription-can-affect-in-iis-application-idle

Answer 1

AFAIK, the answer to your question is that once Web API create a receiver at their end, they won't die as they will be still active and listening to the subscriber (receiver queue).

For more details of publish subscribe method's working in Service Bus, you can visit Service Bus queues, topics, and subscriptions.

Let me know if this answers your question.