CODEWITHSUNDEEP
.netc#-4.0aoppostsharplog4postsharp
Alexander Abramovich
Alexander Abramovich

Reputation: 11458

Log4PostSharp project by inheriting from the ready-made (and working) custom attribute

Need to modify Log4PostSharp project by inheriting from the ready-made (and working) custom attribute. It looks similar to this:

  [AttributeUsage(
    AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Module | AttributeTargets.Struct,
    AllowMultiple = true,
    Inherited = false)]
  [MulticastAttributeUsage(
  MulticastTargets.InstanceConstructor | MulticastTargets.StaticConstructor | MulticastTargets.Method,
    AllowMultiple = true)]
#if SILVERLIGHT
  [RequirePostSharp("Log4PostSharp", "Log4PostSharp.Weaver.SilverlightLogTask")]
#else
  [RequirePostSharp("Log4PostSharp", "Log4PostSharp.Weaver.LogTask")]
  [Serializable]
#endif
  public sealed class LogWithExceptionAttribute : LogAttribute
  {
    public LogWithExceptionAttribute()
    {
      ExceptionLevel = LogLevel.Error;
    }

    ...
  }

This is how I've chosen to annotate some unit-test code:

[LogWithException]
private void DoThrowException()
{
  throw new Exception("test exception");
}

Wanted to try to debug the compile-time process, tried to compile from the command line but couldn't get any hint:

> msbuild Log4PostSharp.Test.csproj /p:PostSharpBuild=Diag /p:PostSharpTrace="AssemblyBinding;Project" /v:detailed

Which is the right way to tackle the problem? What is the wrong thing I am trying to do?

Upvotes: 0

Views: 162

Answers (1)

Alexander Abramovich
Alexander Abramovich

Reputation: 11458

In Log4PostSharp.Weaver.LogTask::ProvideAdvice() there was a following line: var customAttributeEnumerator = customAttributeDictionaryTask.GetAnnotationsOfType(typeof(LogAttribute), true);. The second attribute of GetAnnotationsOfType() was false, meaning that only LogAttribute annotations should be discovered. Changing it to true caused all the descendants of LogAttribute (including my LogWithExceptionAttribute) to be considered.

Upvotes: 1

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