CODEWITHSUNDEEP
c#serializationerror-handlingnservicebus
Kamil Budziewski
Kamil Budziewski

Reputation: 23087

NServiceBus custom error handling TransportMessage deserialization

I'm using my CustomFaultManager to process failed messages, so I can handle them just before putting them in error queue.

in

void IManageMessageFailures.ProcessingAlwaysFailsForMessage(TransportMessage message, Exception e)
{

I get TransportMessage and I have to get type from:

var header = message.Headers["NServiceBus.EnclosedMessageTypes"];
var messageType = MessageTypes.Where(x => x.AssemblyQualifiedName != null 
                                && header.Contains(x.AssemblyQualifiedName)).ToList();

and then apply my custom logic to unzip message (because I'm zipping large msmq messages). Is it possible to get in this method a message which is just like original message which I have in Handle method?

Why this bothers me? For now I need to remember to apply changes in my custom error handler whenever I change serialization method or zipping method.

I would be happy if I could just cast TransportMessage to my custom message implementation just like:

var myMessage = message as MyCustomMessage;

Do you know guys if there is a way to do custom error handling in NServiceBus without doing manual deserialization?

I tried casting to my type of a message (as above), but it keeps giving me null as a result, because message is serialized in Message field in TransportMessage

Upvotes: 1

Views: 401

Answers (1)

Kartik
Kartik

Reputation: 170

We're also on an older version of NServiceBus (3.x). So far, our solution is to have our message handler catch any exceptions, and then wrap them in a custom exception that contains the values that we need from the message. We then throw this exception for NServiceBus to handle.

In our IManageMessageFailures.ProcessingAlwaysFailsForMessage implementation, we invoke the appropriate error handler based on the the Exception type as well as the NServiceBus.EnclosedMessageTypes values.

Hope this helps.

Upvotes: 1

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