Spring Full-Stack Practical Cases

Sep 9, 2026 · Backend Development

Refactoring 7 Duplicate Notification Services Using Template Method Pattern in Spring Boot

The article demonstrates how to correctly apply the DRY principle by refactoring seven duplicated notification service classes in Spring Boot 3.5.0 using the template method pattern and a NotificationMessage value object, consolidating 40 lines of repeated validation, logging, and error handling into a single abstract base class.