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Discussion on: What is the benefit of Functional Programming?

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seykron

In web environments you usually have one or two options to manage errors: retrying IO or returning an HTTP status code 500. There's a user in the other side waiting for a reply, and in the most common request handling model thread-per-request there's a thread bound to the current request waiting to be released. So you can either choose to handle the error flow like a special flow in your business logic (like Try's in scala), or you just can throw an exception, set up a catch-all handler and return a friendly error code so the user can retry the operation.

I really don't support error flows in web environments, it usually opens additional branches in the execution that makes harder to debug and detect errors. The easiest way I know to debug and fix errors is to throw exceptions closer to the place the error occurs.