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c#inversion-of-controlunity-container
Joachim Kerschbaumer
Joachim Kerschbaumer

Reputation: 9891

Unity Interception and Exceptions

i´m currently dealing with an issue where i have a lot of iterfaces and their implementations all created with unity. those classes contain some methods that throw exceptions on a regular base and i wanted to create a dynamic proxy around those classes so i can catch all exceptions occured in methods do handle them somewhere else.

As i´m playing with Unity, i wonder if something like this can be done using Unity Interception.

i.e. create a TransparentProxyInterceptor and wrap a try-catch block around the invocatino of these methods. is this possible at all or am i going into the wrong direction? thanks

Upvotes: 4

Views: 4379

Answers (1)

Mike Valenty
Mike Valenty

Reputation: 8991

Yes, Unity interception (AOP) is an excellent way to deal with exception handling. You can add all kinds of behavior like:

  • write to a log file or the event log
  • send an email
  • increment a performance counter
  • auto retry on timeout or lock exception
  • rethrow a different error

Your call handler will look something like:

public override IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
{
    IMethodReturn result = getNext()(input, getNext);

    if (result.Exception != null)
    {
        // do something
    }

    return result;
}

Upvotes: 6

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