Dealing with exception handling from ViewModelAppenders inside a composition about servicecomposer.aspnetcore HOT 1 OPEN

Thanks for your question @Stephanvs and I'm happy that you're thinking about using ServiceComposer.

I spent a lot thinking about exception handling and less important handlers and I couldn't find a solution that satisfied me without compromising on something. I'm leaning toward thinking that it's not ServiceComposer composer responsibility to deal with errors in handlers.

Let me give you an overview of the whys:

• ServiceComposer composer has a generic ICompositionErrorsHandler mechanism that allows code to hook into error handling, and intentionally doesn't allow for error suppression, it's just a way to provide handlers with a chance to recover. This is primarily designed with write scenarios in mind and not read ones.
• If ServiceComposer was to handle exceptions for each handler it would also require a mechanism to let handlers explain if the error should bubble up or not, otherwise the only option would be to suppress any error which is not ideal.

Given that your code is the best place to understand if an error should bubble up or not, I have always preferred to have try/catch blocks in handlers where appropriate, instead of a generic mechanism to handle failing handlers.

That being said. Change my mind! 😎😀

from servicecomposer.aspnetcore.