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Asked: 2026-05-15T20:41:18+00:00

I’ve an application that offers its Business Layer through a Service Layer developed with

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I’ve an application that offers its Business Layer through a Service Layer developed with WCF.
What I’m thinking about is: this service layer offers operational method like Create, Update and so on. These operation then reroute these calls to the Business Layer. The question is: suppose that one of these call doesn’t accept a null input value (like: Create a null object), where is the best place to perform the check? My personal answer is in both the places (service and business) as I can guarantee the reuse of the Business Layer without using the Service Layer and viceversa.

Am I right?

Thanks
Marco

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1 Answer

  1. Editorial Team

    Your library code or the code that is
    used by higher-layers in your
    application must always only throw
    exceptions and never worry about how
    to deal with them.

    This is important because you may use this library at many places for different purposes.

    In your application presentation layer, if you’re consuming a library code and you’re aware about the possible exceptions then do catch them with try/catch.

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