Unity Interception aka Microsoft Research Detours

Topics: Policy Injection Application Block
Aug 17, 2011 at 5:55 AM
Edited Aug 17, 2011 at 2:33 PM

Years back I used the Microsoft Research Detours package to inject instrumentation to a dll -- without the caller or receiver having any awareness, I injected some of my code to run in place of a target function.

I would like to do that now in a .NET application. Namely I'd like to wrap any call to SqlCommand.ExecuteReader and ExecuteScalar (to start and this is only an example). This is for a large set of code with thousands of individual SqlCommand creations, not using the DI functionality (it came later in the project). I would like to have an instrumented log of all sql command calls, the parameters, and their durations. I could do this at the SQL side, but for now I would like to do this in the application context.

I was hoping that Unity Interception allowed me to do this -- to point Unity at the System.Data.SqlCommand type during application initialization and it would interface with the type resolver to inject my overrides in, regardless of where or how code created SqlCommand instances.. With that I would quietly implement the necessary instrumentation.

This is in FullTrust applications.

After reading the documentation and trying some samples, it doesn't seem to be working out this way. Did I misunderstand the benefits of Unity Interception?

Failing that, any suggestions on any other approach to achieving this goal?

Thank you for your time and consideration. Please note that I picked PI as the block merely as a proxy as there is no unity choice, and I can't find that discussed elsewhere.

EDIT: per daaberkads recommendation I have posted this over in the Unity discussion. Thank you.

Aug 17, 2011 at 6:52 AM

Hi,

You may want to post this to Unity Forum (http://unity.codeplex.com/discussions) to get a better answer :)