MassTransit Publisher 无异常抛出

Question

I have a MassTransit Producer / Publisher developed in Asp.Net Web API.

The producer simply sends message to the Exchange -> Queue.

public async Task<bool> AddToQueue(int msgId, Message message)
{
     var endpoint = await _bus.GetSendEndpoint(new Uri("exchange:testExchange?bind=true&queue=MessageQueue"));
     await endpoint.Send(new Message()
     {
         Id = msgId,
         Text = message.Text
     });
     return true;
}

However, the above would not return any exception (even if I had some sort of handling in place) if for instance queue was not found or there was an issue with binding etc. Message will simply get lost with no sign of it creating an error queue?

I understand it will create a queue if one was not found but am sure if there was an issue between with the Message broker and producer how would you handle that?

Answer 1

To get an exception from task operation you need to assign result of your method execution to Task variable, like this:

Task<bool> myTask = AddToQueue(42, "Some message");

And than you can get your exception from Exception property of Task:

if (myTask.Exception != null) 
    Console.WriteLine(myTask.Exception.InnerException.Message);