NServiceBus Message Handlers and Retries

Question

I have the following problem with NServiceBus. After an exception in an h NServicebus I Log to Application Insights. If the error is not transient the log is repeated every retry till the message goes in the error queue.

There is a way in the handler to recognize if I am in the first iteration or in one of the retries without implementing custom code?

I have seen that there is a global Notification System, But I will need to have it at Handler level.

Answer 1

You can check the message headers.

• Immediate retries: https://docs.particular.net/nservicebus/messaging/headers#retries-handling-headers-nservicebus-flretries
• Delayed retries: https://docs.particular.net/nservicebus/messaging/headers#retries-handling-headers-nservicebus-retries

public Task Handle(MyMessage message, IMessageHandlerContext context) { var numberImmediateRetries = context.MessageHeaders[NServiceBus.Headers.ImmediateRetries]; var numberDelayedRetries = context.MessageHeaders[NServiceBus.Headers.DelayedRetries]; }