Hibernate Basics: Hibernate Basics covers the core principles, concepts, and features of Hibernate framework. It includes understanding Hibernate architecture, session management, session factory, persistence classes, and object-relational mapping.
Hibernate Configuration: Hibernate Configuration focuses on setting up the necessary configurations for Hibernate to work efficiently. This skill involves configuring database connections, mapping files, Hibernate properties, and various settings related to caching and transactions.
Mapping Entities: Mapping Entities is the skill of defining the relationship between Java objects and database tables. It covers the use of annotations or XML mappings to map classes, attributes, and associations to corresponding database entities.
Hibernate Query Language (HQL): Hibernate Query Language (HQL) enables developers to write queries using object-oriented concepts instead of dealing with SQL directly. It allows complex querying and manipulation of data using a familiar syntax similar to SQL.
Criteria API: The Criteria API provides a more programmatic way to define queries in Hibernate. This skill involves creating and executing criteria queries using a fluent API, allowing dynamic query building and flexible filtering options.
Caching: Caching is an important aspect of Hibernate to improve performance. This skill covers different levels of caching, such as first-level cache, second-level cache, query caching, and cache configurations to optimize data access and reduce database hits.
Transactions: Transactions ensure data integrity and consistency in a database. This skill involves understanding the concept of ACID properties (Atomicity, Consistency, Isolation, Durability) and implementing transaction management using Hibernate to handle data modifications and ensure data integrity.
Annotations: Annotations in Hibernate provide a way to define mappings and configurations directly through Java code, reducing the need for XML mapping files. This skill covers the use of various annotations like @Entity, @Table, @Column, @Id, and other lifecycle annotations to define mappings and access database entities.
Inheritance: Inheritance is a powerful feature in Hibernate that allows mapping object hierarchies to database tables. This skill includes understanding different inheritance strategies, such as table per class hierarchy, table per subclass, and table per concrete entity, and their implications on query efficiency and database schema design.
Integration: Integration involves integrating Hibernate with other technologies and frameworks. This skill covers integrating Hibernate with Spring, JPA (Java Persistence API), and other ORM frameworks to leverage their capabilities and enhance application development and maintainability.
Performance Optimization: Performance Optimization in Hibernate includes techniques and practices to improve the performance of database operations. This skill covers optimizing queries, managing session and transaction boundaries, tuning caching options, and utilizing batch processing and lazy loading to minimize database roundtrips and enhance application responsiveness.
Best Practices: Best Practices in Hibernate include following industry-standard coding conventions, design patterns, and techniques to ensure efficient, maintainable, and scalable Hibernate applications. This skill covers topics like session management, exception handling, error logging, database schema design, and performance tuning to produce high-quality and reliable Hibernate applications.