PostSharp: OnMethodBoundaryAspect doesn't get called

Question

Hi

I'm using PostSharp to apply a CompoundAspect to a ActiveRecord class (from CastleProject). The code looks like this:

public override void ProvideAspects(object targetElement, LaosReflectionAspectCollection collection)
{
    Type targetType = (Type)targetElement;
    RevertibleSubAspect revertible = new RevertibleSubAspect();
    revertible.Cascade = this.Cascade;
    collection.AddAspect(targetType, revertible);

    //This isn't working
    MethodInfo saveMethod = targetType.GetMethod("Save");
    collection.AddAspect(saveMethod, new CommitOnSaveSubAspect());

    foreach (PropertyInfo property in targetType.GetProperties())
    {
        if((this.Only != null && this.Only.IndexOf(property.Name) == -1) ||
           (this.Except != null && this.Except.IndexOf(property.Name) > -1))
        {
            continue;
        }

        if (property.DeclaringType == targetType && property.CanWrite)
        {
            MethodInfo method = property.GetSetMethod();
            if (method != null && !method.IsStatic)
            {
                collection.AddAspect(method, new TrackInitialPropertyValuesSubAspect());
            }
        }
    }
}

Everything works fine, except the CommitOnSaveSubAspect which is a OnMethodBoundaryAspect. The OnSuccess method never gets called when the Save method is invoked. I have already tried moving the code to OnEntry and OnExit but same situation here.

The CommitOnSaveSubAspect class looks like this:

[Serializable]
class CommitOnSaveSubAspect : OnMethodBoundaryAspect
{
    public override void OnSuccess(MethodExecutionEventArgs eventArgs)
    {
        ((IRevertible)eventArgs.Instance).Commit();
    }
}

Am I applying the aspect the wrong way?

Answer 1

Was PostSharp defined globally when you installed it? Otherwise, you'll have to edit your project files in order for PostSharp to be injected properly into your assemblies.

See http://doc.postsharp.org/1.0/Default.aspx##PostSharp.HxS/UserGuide/Platform/EnablingPostSharp.html.

Answer 2

A good way to debug an aspect is to look at the resulting assembly using Reflector. Are methods enhanced as you expect?

You can also debug the ProvideAspects method by putting a breakpoint into it and running msbuild with the following command line:

msbuild /p:PostSharpAttachDebugger=true