Page Comparison

Java Persistence API

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Spring Data JPA, part of the larger Spring Data family, makes it easy to easily implement JPA based repositories. This module deals with enhanced support for JPA based data access layers. It makes it easier to build Spring-powered applications that use data access technologies.
It provides the following key dependencies:

Hibernate: One of the most popular JPA implementations.
Spring Data JPA: Helps you to implement JPA-based repositories.
Spring ORM: Core ORM support from the Spring Framework.

Source: https://spring.io/projects/spring-data-jpa

By default Spring uses Hibernate as the default JPA vendor. Although Hibernate is a good choice, some of us may prefer to use EclipseLink as it was supposed to be the reference implementation for the Java Persistence JSR.
How configuring Spring-Boot to use EclipseLink as the JPA provider: https://blog.marcnuri.com/spring-data-jpa-eclipselink-configuring-spring-boot-to-use-eclipselink-as-the-jpa-provider/

Jakarta Persistence

Jakarta Persistence defines a standard for management of persistence and object/relational mapping in Java(R) environments.

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Transaction management refers to the tasks of processing multiple transactions issued by various clients of a database server in such a way that the ACID contract can be fulfilled, that is, the properties of atomicity, consistency preservation, isolation, and durability of each individual transaction can be guaranteed. Transaction management is generally understood as requiring serializability-based concurrency control as well as recovery from failures. Concurrency control is the task of scheduling transactions such that their serializability can be guaranteed, while recovery has to restore a consistent database state after a system or media failure. Assuming that the database server is in charge of the “C,” the former guarantees the “I” in ACID, the latter the “A” and “D” properties. Transaction management has to be highly efficient, as modern transaction servers need to accommodate thousands of transactions...

The Spring Framework provides a consistent abstraction for transaction management. The Spring Framework’s declarative transaction management is made possible with Spring aspect-oriented programming (AOP), although, as the transactional aspects code comes with the Spring Framework distribution and may be used in a boilerplate fashion, AOP concepts do not generally have to be understood to make effective use of this code.

Aspect-Oriented Programming

Aspect-Oriented Programming (AOP) complements Object-Oriented Programming (OOP) by providing another way of thinking about program structure. The key unit of modularity in OOP is the class, whereas in AOP the unit of modularity is the aspect. Aspects enable the modularization of concerns such as transaction management that cut across multiple types and objects. (Such concerns are often termed crosscutting concerns in AOP literature.)
One of the key components of Spring is the AOP framework. While the Spring IoC (Inversion of control) container does not depend on AOP, meaning you do not need to use AOP if you don’t want to, AOP complements Spring IoC to provide a very capable middleware solution.

Source: https://docs.spring.io/spring-framework/docs/4.3.15.RELEASE/spring-framework-reference/html/aop.html

Use a Higher-level Database Migration Tool

Spring Boot supports two higher-level migration tools: Flyway and Liquibase.

Example how how to set things up with Liquibase: https://github.com/spring-projects/spring-boot/tree/v2.1.18.RELEASE/spring-boot-samples/spring-boot-sample-liquibase

Policy Framework - Models

Models are implemented using Jakarta Persistence. Spring Data JPA needs same implementation.

Code Block

language	java
title	JpaToscaProperty
linenumbers	true

import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.Table;


@Entity
@Table(name = "ToscaProperty")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
@EqualsAndHashCode(callSuper = false)
public class JpaToscaProperty extends PfConcept implements PfAuthorative<ToscaProperty> {
    private static final long serialVersionUID = 1675770231921107988L;

    @EmbeddedId
    @VerifyKey
    @NotNull
    private PfReferenceKey key;

    @Column
    @VerifyKey
    @NotNull
    private PfConceptKey type;

    @Column
    @NotBlank
    private String description;

Spring Repository

Using Spring Data JPA it needs to implement a repository for each model.