public override IMessage Invoke(IMessage msg)
    {
        var methodCall = msg as IMethodCallMessage;
        var methodInfo = methodCall.MethodBase as MethodInfo;

        if (Thread.CurrentPrincipal.IsInRole("ADMIN"))
        {
            try
            {
                Log("User authenticated - You can execute '{0}' ", methodCall.MethodName);

                var result = methodInfo.Invoke(_decorated, methodCall.InArgs);

                return new ReturnMessage(result, null, 0, methodCall.LogicalCallContext, methodCall);
            }
            catch (Exception e)
            {
                Log(string.Format("User authenticated - Exception {0} executing '{1}'", e), methodCall.MethodName);

                return new ReturnMessage(e, methodCall);
            }
        }

        Log("User not authenticated - You can't execute '{0}' ", methodCall.MethodName);

        return new ReturnMessage(-1, null, 0, methodCall.LogicalCallContext, methodCall);
    }