Java Brains

Why JPA?

How To Learn

Object Relational Mapping

Hibernate vs JPA

How JPA works and its advantages

Setting Up

Setting Up H2 Database server

New Maven project and adding dependencies

Creating a persistence context + Creating a model class

Persisting Entities with Entity Manager

Understanding Persistence XML

Entity Annotations Unit Intro

@Table and @Column customizations

Temporal, Date and other data types

Dealing with Enumerations

Transient

Primary Key

Examining hbm2ddl options

Entity read operation with JPA

Update operation with JPA

Deleting an Entity

Creating the second entity

Modeling a One-to-One relationship

Fetching and Fetch Types

Relationship directionality and mappedBy

OneToMany and ManyToOne

Reverse relationship with OneToMany

Why Have Cyclical Relationships?

Using JoinColumn

Many To Many relationship

FetchType for ManyToMany

Customizing JoinTable and JoinColumns

Updating relationships with JPA

Deletes and cascades with relationship mappings

Persistence Context as a first level cache

Entity Life cycle - Transient and Managed

Entity Life cycle - Removed and Detached

Entity Life cycle - Clear and refresh methods

Querying with JPQL

Using like and between in JPQL

Joins with relationships

Freeform queries and custom result types

Avoiding SQL injection with JPQL parameters

Named queries

Creating a Spring Boot JPA project

Configuring database connection using application properties

Persisting an Entity with Spring Boot

Injecting and using shared PersistenceContext

Using Spring Boot JPA Reposititory

Declarative Transactions

Understanding Transaction Propogation

Read-Only Transactions

Recap