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POWCF service attribute to log method calls and exceptions
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  1. POWCF service attribute to log method calls and exceptions
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    copied!<p>I have a requirement to log each method call in a WCF service, and any exceptions thrown. This has led to a lot of redundant code, because each method needs to include boilerplate similar to this:</p> <pre><code>[OperationContract] public ResultBase&lt;int&gt; Add(int x, int y) { var parameters = new object[] { x, y } MyInfrastructure.LogStart("Add", parameters); try { // actual method body goes here } catch (Exception ex) { MyInfrastructure.LogError("Add", parameters, ex); return new ResultBase&lt;int&gt;("Oops, the request failed", ex); } MyInfrastructure.LogEnd("Add", parameters); } </code></pre> <p>Is there a way I can encapsulate all this logic into an attribute <code>MyServiceLoggingBehaviorAttribute</code>, which I could apply to the service class (or methods) like this:</p> <pre><code>[ServiceContract] [MyServiceLoggingBehavior] public class MyService { } </code></pre> <hr/> <p><strong>Note #1</strong> </p> <p>I realize that this can be done using <a href="https://stackoverflow.com/questions/4133569/how-to-log-method-calls-on-targets-marked-with-an-attribute">Aspect-oriented programming</a>, but in C# the only way to do this is to modify bytecode, which requires the use of a third-party product like PostSharp. I would like to avoid using commercial libraries.</p> <p><strong>Note #2</strong></p> <p>Note that Silverlight applications are the primary consumers of the service.</p> <p><strong>Note #3</strong></p> <p><a href="https://stackoverflow.com/questions/1178256/log-wcf-service-calls-with-parameter-information">WCF trace logging</a> is a good option in some cases, but it doesn't work here because, as noted above, I need to inspect, and in the case of an exception change, the return value.</p>
 

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