I'm working with a monolithic architecture that has several connected components. The UI layer (Component D) is the only part that interacts directly with users, while the backend components (A, B, and C) communicate via APIs. My question is about how to properly propagate errors that occur deep in the call chain, particularly if an issue arises in Component A. Only Component D should present error messages to the user, so I'm looking for best practices on how to handle and propagate these errors effectively through Components B and C while keeping the backend focused on business logic. How should we manage this in such a layered structure?
3 Answers
It's crucial to log errors at every level to track down issues effectively. The challenge is communicating these errors without overwhelming the user with technical details they won't understand. Focusing on user-friendly messages in the UI while keeping the logging informative for developers is the way to go.
I think the key here is that your business logic components should embed error semantics, which would then be communicated to the UI through the API. As long as the API returns meaningful errors, the UI can handle them without any issues.
For managing exceptions, consider letting them bubble up if they're not something the user can act on. For example, if it's an internal error that the user doesn't need to worry about, you could return a generic error message. On the other hand, if it’s something actionable for the user, catch it and provide a more user-friendly message.
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