Hi all.  I’d like to know if I’m doing this correctly.  I want to set a value in ThreadContext.Properties from application code.  I then want some appenders to log or not log based on this contextual information.  I believe the right way to do this is to create a class that implements IFilter and apply some filters to the these appenders.

So far I’ve created my filter class, and I’ve added the ThreadContext.Properties[“foo”] = “bar” to my application code.

Now, I’m looking at how to implement the Decide method on my filter class.  I had assumed that the “foo”-“bar” information would be available in the LoggingEvent that gets passed in to Decide but if it’s there, I don’t see it.  However, if I directly access ThreadContext.Properties[“foo”] from inside the Decide method then that works.  This seemed odd to me at first because I didn’t know that Decide() would always be called on the thread where the log.Info(“etc”) call came from.  But if Decide() is always called on that thread, I should be safe to access ThreadContext.Properties[“foo”] from inside Decide() – right?

If I’m not correct or there’s a better way to access the thread-contextual information from inside Decide() please let me know…

Bump J  Hoping for some feedback…