Inject logging dependency with Castle Windsor

Question

I was trying to inject logging dependency by Castle Windsor to my code. More precisely, whenever a method in a class throws an error or application flow enters into a method it simply logs into a file. How to do this by writing nothing like

logger.Debug("Error code");

in the methods explicitly for each of the methods. Suppose we add attribute on each of the class or methods to leverage the logging facility for that.

Thanks in advance.

jason jason · Accepted Answer · 2011-08-12T21:19:20

Use the interceptor facility in Castle Windsor.

So mark your class with

[Interceptor(typeof(UnhandledExceptionLogger))]

and create a class UnhandledExceptionLogger that implements IInterceptor. Roughly:

public void Intercept(IInvocation invocation) {
    try {                
        invocation.Proceed();
    }
    catch (Exception e) {
        // log the exception e
        throw;
    }
}

and then when Castle Windsor creates an instance of your class marked with this Interceptor, it will create a proxy that wraps all methods invocations in the above try/catch log/rethrow block.

Inject logging dependency with Castle Windsor

1 Answers