Mastering JPA

JPA Basics :

1. Creating an Entity

2. Primary key id generation

3. Handling enums

4. Handling enums - @Enumerated - EnumType.STRING

5. @ElementCollection - List

6. @ElementCollection - Map

7. Working with LocalDateTime/OffsetDateTime

8. @Embeddable and @Embedded

9. Entity AttributeConverter

10. Entity Lifecycle Callbacks

Hibernate First Level Cache :

1. Hibernate First Level Cache

2. Hibernate First Level Cache

Entity Relationships :

1. Many to One Relationship - Unidirectional

2. Many to One or One to Many Relationship - Bidirectional

3. One to One Relationship - Unidirectional

4. One to One Relationship - Bidirectional

5. Many to Many Relationship - Bidirectional

6. Hibernate Programmatic Configuration

Entity Relationship Cascade Types :

1. cascade : CascadeType.PERSIST

2. cascade : CascadeType.REMOVE

Entity Relationship Fetch Types :

1. fetch : FetchType.LAZY

2. fetch : FetchType.EAGER

Orphan Removal :

1. Orphan Removal

JPA Queries :

1. Native SQL query

2. JPQL

3. Named Query (Named JPQL)

4. Named native query

5. Criteria API

N+1 Select Problem and Solution :

1. N+1 Select Problem

2. N+1 Solution : Join Fetch

3. N+1 Solution : Entity Graph

4. N+1 Solution : Named Entity Graph