Java Persistence with JPA

Course details

Jakarta Persistence (JPA) is the standard for mapping Java objects to databases. JPA provides several advantages over traditional data access methods like Java Database Connectivity (JDBC). In this hands-on course, Kesha Williams discusses these advantages and acquaints you with the basics of JPA, entity management, transaction management, and relationship mapping. Kesha then discusses more advanced topics like inheritance mapping strategies, Jakarta Persistence Query Language (JPQL), the Criteria API, and persistence providers. She explains how inheritance functions when working with mappings, classes, and tables. She also demonstrates how to create queries using JPQL as well as native queries.

Concepts

Introduction

Map Java objects to databases
What you should know
Reviewing the course project

Understanding JPA

Exploring the history of JPA
Leveraging Object-Relational Mapping (ORM)
Understanding JPA and its benefits
Demo - Configuring JPA
Demo - Reviewing JPA annotations
Challenge - Create simple employee, company, and salary classes
Solution - Create simple employee, company, and salary classes

Managing Entities

What is an entity
Demo - Working with the entity manager
Demo - Persisting entities
Mapping keys
Demo - Mapping keys
Implementing CRUD operations
Demo - CRUD operations
Challenge - Persist employee, company, and salary entities
Solution - Persist employee, company, and salary entities

Exploring Entity Relationships

What are entity relationships
Annotating a one-to-one relationship
Demo - Annotating a one-to-one relationship
Annotating a one-to-many relationship
Demo - Annotating a one-to-many relationship
Annotating a many-to-one relationship
Demo - Annotating a many-to-one relationship
Annotating a many-to-many relationship
Demo - Annotating a many-to-many relationship
Utilizing inheritance mapping strategies
Demo - Utilizing inheritance mapping strategies
Challenge - Implement a many-to-many relationship
Solution - Implement a many-to-many relationship

Understanding Transactions

What is a transaction
Managing transactions
Demo - Managing transactions
Challenge - Manage a transaction
Solution - Manage a transaction

Querying Entities

Querying with the Jakarta Persistence Query Language (JPQL)
Demo - Querying with JPQL
Using native queries
Demo - Querying with native queries
Leveraging the Criteria API
Demo - Leveraging the Criteria API
Challenge - Query an entity using JPQL
Solution - Query an entity using JPQL

Conclusion

Good luck on your JPA journey