Vault-Web/password-manager

Add custom exceptions and exception middleware

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#57 opened on Dec 28, 2025

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backendenhancementgood first issue

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Description

Currently, the backend mainly throws IllegalArgumentException for errors. We need custom exception classes and a centralized exception middleware to provide clearer error handling and consistent API responses.

You can orient yourself on the Vault Web Repo backend.

Contributor guide

Research direction
Study existing exception handling, create custom exception classes, and implement a middleware that catches exceptions and returns consistent JSON responses. Look at the Vault Web Repo backend for reference.
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70