aquibdev.hashnode.devMastering Custom Validation Annotations in Spring Boot 3: Beyond @NotNullStandard Jakarta Bean Validation annotations often fail to capture complex, multi-field business rules. This guide explains how to implement the ConstraintValidator interface to create reusable, class-level custom annotations in Spring Boot.Anyone wh...Dec 20, 2025·4 min read
aquibdev.hashnode.devSpring @Transactional Best Practices: Safeguard Your Database OperationsIn my early days of working with Spring's @Transactional annotation, I encountered a costly mistake that led to hours of debugging in production. A money transfer feature was silently corrupting data—funds were deducted from one account but never cre...Dec 7, 2025·6 min read
aquibdev.hashnode.devSpring Boot HttpClientErrorException: Best Practices for Error HandlingThe Problem RestTemplate restTemplate = new RestTemplate(); // If this URL returns 404, the app crashes! String response = restTemplate.getForObject("<https://api.example.com/users/999>", String.class); During a company project one evening, I faced ...Nov 30, 2025·4 min read
