High-Performance Java Persistence – Chapter 12 – Inheritance

Part 2, Chapter 12 Every new chapter of my book is released right after it’s being completed, so the reader doesn’t have to wait for the whole part to be finished to get access to new material. Table of content This chapter explains JPA inheritance from a data access performance point of view. 12. Inheritance 12.1 Single table 12.2 Join table 12.3 Table-per-class 12.4 Mapped superclass

How do JPA and Hibernate define the AUTO flush mode

Introduction The Persistence Context acts as a transactional-write behind cache for the incoming entity state transitions, and all changes are synchronized with the database during flushing. Although both the Hibernate Session and the JPA EntityManager define a flush() method to manually trigger this process, it’s much more convenient to let Hibernate manage the Persistence Context flushing. Unfortunately, there’s is a major difference between how JPA and Hibernate define the automatic flushing mechanism.

High-Performance Java Persistence – Chapter 11 – Relationships

Part 2, Chapter 11 Every new chapter of my book is released right after it’s being completed, so the reader doesn’t have to wait for the whole part to be finished to get access to new material. Table of content This chapter explains JPA relationships from a data access performance point of view. 11. Relationships 11.1 Relationship types 11.2 @ManyToOne 11.3 @OneToMany 11.3.1 Bidirectional @OneToMany 11.3.2 Unidirectional @OneToMany 11.3.3 Ordered unidirectional @OneToMany 11.3.3.1 @ElementCollection 11.4 @OneToOne 11.4.1 Unidirectional @OneToOne 11.4.2 Bidirectional @OneToOne 11.5 @ManyToMany 11.5.1 Unidirectional @ManyToMany 11.5.2 Bidirectional @ManyToMany 11.5.3 The… Read More

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