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Service Layer Patterns

The service layer uses consistent design patterns to ensure maintainability, testability, and reliability across all service implementations.

Pattern Overview

Services follow six core patterns:

1. Dependency Injection - Constructor-based, via Lombok
2. Transaction Management - @Transactional annotation for data consistency
3. Exception Translation - Domain exceptions → HTTP responses
4. Data Transformation - DTO ↔︎ Entity mapping
5. Validation Delegation - Specialized validator classes
6. Audit Logging - Change tracking via timestamps and user tracking

Detailed Documentation

• Dependency Injection
• Transaction Management
• Exception Translation
• Data Transformation
• Validation Strategy
• Audit Logging

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