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Articles tagged with #exception
Practical, expert patterns for extracting logging, validation, security, metrics, and transaction concerns out of Spring controllers while preserving clarity, testability, and predictable performance—no opaque "magic" layers, only explicit, maint...
A deep technical exploration of why relying solely on a database unique constraint is insufficient for concurrency control. Covers DB behaviors, Java examples (JDBC/JPA), performance implications, edge cases, retry strategies, advisory locks, and...
When a backend developer says they “know Java,” what interviewers really want to see is whether you understand what happens under the hood: how classes are loaded, why tiny details like Integer caching matter, and how the JIT and escape analysis ...
You finally get JWT verification green across the board, the signature checks out, the issuer is legit, and yet the API responds with a stubborn 403. No stack trace fireworks, no smoking gun—just Access Denied. If that feels like being carded at ...
When working with complex microservices or multi-tenant systems, a small detail like the context-path can make a big difference in routing, logging, and debugging your API. Yet, developers often overlook how this setting affects error handling—es...
Spring Boot provides a robust environment for testing applications with its seamless integration with JUnit. However, as you dive deeper into testing your applications, you might encounter the notorious IllegalStateException. This exception often...
