From AI Tools/OpenAI/Internet
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Absolutely! Here’s a concise, copyright-free summary of Java EE code refactoring
Java EE Code Refactoring: Best Practices
Refactoring in Java EE helps improve code quality, maintainability, and performance without changing functionality. Here are some key practices:
1. General Refactoring
- Remove duplicate code with helper methods or utility classes.
- Break long methods into smaller, focused functions.
- Use meaningful names for classes, methods, and variables.
- Replace hard-coded values with constants or enums.
- Encapsulate fields with getters/setters.
2. Refactoring Java EE Components
- EJBs: Extract shared logic into stateless beans, use dependency injection instead of manual JNDI lookups.
- JPA: Use DTOs instead of exposing entities, avoid N+1 queries, and consolidate repetitive validations with bean validation.
- Servlets/JSPs: Keep Servlets thin; move business logic to service layers; use JSTL or custom tags for repetitive JSP code.
- REST Services: Handle repeated request logic with filters/interceptors, use DTOs, and centralize exception handling.
- CDI: Use
@Injectto decouple components and define proper bean scopes.
3. Architecture & Design
- Separate concerns with service, DAO, and controller layers.
- Centralize exception handling and logging.
- Move configuration values to properties files or environment variables.
4. Performance & Efficiency
- Use connection pooling and caching.
- Optimize lazy vs. eager loading in JPA.
- Batch database operations when possible.
5. Testing & Maintainability
- Write unit tests for services and DAOs.
- Make code testable by avoiding static dependencies.
- Use mocking frameworks for isolated component testing.
Summary:
Refactoring in Java EE focuses on separation of concerns, decoupling, eliminating duplication, optimizing persistence, centralizing logging and exceptions, and improving testability. Following these practices keeps enterprise applications clean, efficient, and easier to maintain.
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