How do I run an Azure Service Bus Topics subscriber app 24/7 in Azure?

Question

There is an example here that explains on how to send messages and receive messages using Azure Service Bus through a publisher and subscriber application.

My questions are about the subscriber application that receives messages:

1. Does registering in the application a message handler with subscriptionClient.RegisterMessageHandler(ProcessMessagesAsync, messageHandlerOptions); process the messages 24/7 until the application is shut down?
2. Can I deploy the subscriber console app in Azure only through Docker Container? If I don't want to use containers, what is the other hosting option I have? I have done CI/CD pipeline to host a WebAPI in Azure App Services from Visual Studio 2019 before.

Answer 1

Does registering in the application a message handler with subscriptionClient.RegisterMessageHandler(ProcessMessagesAsync, messageHandlerOptions); process the messages 24/7 until the application is shut down?

That's correct. That API is intended for the continuous flow of messages that needs to be processed.

Can I deploy the subscriber console app in Azure only through Docker Container? If I don't want to use containers, what is the other hosting option I have?

You can host continuously running Azure Service Bus processing using the following options:

• Virtual Machine(s)
• AKS/ACI
• Service Fabric
• Azure WebJobs (requires a WebApp)

An alternative option would be to look into Azure Functions. While it doesn't run 24/7, it allows a reactive type of application.