Key Concepts in ORM with Java Spring
Introduction to ORM
- Understanding the concept of Object-Relational Mapping (ORM) in the context of Java Spring.
- Mapping Java objects to relational database tables.
Spring Data JPA
- Overview of Spring Data JPA (Java Persistence API).
- Simplifying database access and interaction with JPA annotations.
Entity Classes
- Creating and defining entity classes in Java Spring.
- Annotating entities with JPA annotations like @Entity, @Table, and @Id.
Repository Interface
- Designing repository interfaces for database operations.
- Utilizing Spring Data JPA repository methods for common CRUD operations.
EntityManager
- Using the EntityManager for programmatic JPA operations.
- Executing queries, managing entity states, and transactions.
Relationships in JPA
- Establishing relationships between entities (One-to-One, One-to-Many, Many-to-One, Many-to-Many).
- Handling cascading operations and fetch types.
JPQL (Java Persistence Query Language)
- Writing JPQL queries to retrieve data from the database.
- JPQL syntax, parameters, and result mappings.
Spring Data Repositories
- Leveraging Spring Data repositories for simplified data access.
- Query methods, custom queries, and repository inheritance.
Auditing with JPA
- Implementing entity auditing for tracking changes.
- Utilizing @CreatedDate, @LastModifiedDate, and @CreatedBy annotations.
Transactions in Spring
- Managing transactions in Spring applications.
- Using @Transactional annotation and programmatic transaction management.
Caching Strategies
- Implementing caching mechanisms in Spring Data JPA.
- Configuring and customizing the caching layer.
Pagination and Sorting
- Implementing pagination and sorting in Spring Data repositories.
- Enhancing performance and optimizing query results.
Validation with Bean Validation
- Applying validation rules using Bean Validation annotations.
- Validating entity properties before database operations.
Spring Boot Integration
- Integrating Spring Data JPA with Spring Boot applications.
- Auto-configuration and customization options.
Testing with Spring Data JPA
- Writing unit tests for Spring Data JPA repositories.
- Using in-memory databases and test configurations.
Best Practices and Optimization
- Adhering to best practices for efficient ORM implementation.
- Optimizing queries and data access for better performance.
Make sure to adapt these concepts based on your specific project requirements and use cases.