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Using System.Diagnostic.DiagnosticSource to intercept database requests– Improvements

Yesterday I blogged about the usage of DiagnosticSource to capture database specific events. The code we ended up with looked like this:

What is rather unfortunate is that you are working with generic events and that you need to use magic strings and reflection to capture the object data:

A solution exists through the usage of the Microsoft.Extensions.DiagnosticAdapter package. This Nuget package will use code generation to avoid the cost of reflection.

dotnet add package Microsoft.Extensions.DiagnosticAdapter

  • Update the implementation to use the SubscribeWithAdapter extension method:
  • Now we no longer need to implement the IObserver<KeyValuePair<string, object>> interface. Instead, for each event that we want to handle, we need to declare a separate method, marking it with an attribute DiagnosticNameAttribute. The parameters of these methods are the parameters of the event being processed:
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