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Tuesday, June 17, 2008

WCF Practices: Single point for WCF proxy calls

Hi All,
Let's say you want that all your WCF proxy calls will come from one function. This could be very useful and save a lot of code.
For example you can write your proxy exception handling in one place.

Here is the code example that work on .NET framework 3.5 only:

// The public function that execute the WCF proxy call
public void WCFProxyCall()
{
CreateConferenceRequest r = new CreateConferenceRequest();

Func createFunc = a =>
proxy.CreateConference(a);

CreateConferenceResponse ci = ProxyWrapperOperation(createFunc, r);
}


// This is the single point function for the entire WCF proxy calls
// Here you can write code for all your WCF proxy calls.
private TResult ProxyWrapperOperation(Func operation, T parameter)
{
TResult result;
try
{
result = operation(parameter);
}
catch (TimeoutException timeProblem)
{
proxy.Abort();
throw;
}
catch (FaultException unknownFault)
{
throw;
}
catch (CommunicationException commProblem)
{
proxy.Abort();
throw;
}

return result;
}

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