How to control the message when azure function is triggered by service bus?

Question

Hello!

I'm working with a service bus that triggers an Azure Function. In each invocation of the Azure function, I need to process the received message.

I've noticed that if my Azure function throws an error, the message's deliveryCount is automatically incremented by 1.

Now, what I want to achieve is to call the abandonMessage function without throwing an exception. However, I've encountered some challenges.

I attempted to use contex.binding.data.messageReceiver, but it appears to be an empty object.

I also tried creating a helper function that creates a receiver and then calling receiver.abandonMessage(message). The issue I encountered here is that the message type required by abandonMessage is ServiceBusReceivedMessage, whereas the message I receive in my function is the object I initially placed into the service bus. As a result, it lacks the necessary properties for the ServiceBusReceivedMessage type.

Is there a way to abandon or mark the message as completed without throwing an exception?

Is it possible to touch the ServiceBuseSender/Receiver created by Azure when using Service Bus as trigger and binding?

Answer 1

@Zava You cannot bind to the MessageReceiver class in non-C# languages unfortunately.

The only built-in option is to set the maxRetries setting in host.json to 1 and throw an exception to abandon the message.

The other option would be to leave the message complete and send out a new message into a different queue for further processing. This is a way to mimic the dead letter queue behavior by using a separate managed queue.