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JPA Entity Graph 1. Overview JPA 2.1 has introduced the Entity Graph feature as a more sophisticated method of dealing with performance loading. It allows defining a template by grouping the related persistence fields which we want to retrieve and lets us choose the graph type at runtime. In this tutorial,… Continue Reading jpa-entity-graph
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Spring Persistence Tutorial This tutorial series focuses on doing Persistence with Spring – illustrating examples with Hibernate, JPA and Spring Data. Core Persistence + Hibernate 4 with Spring + Hibernate 5 with Spring + JPA with Spring (popular) + Persistence with Spring Data JPA (popular) + Spring Data Java 8 Support +… Continue Reading persistence-with-spring-series
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Types of JPA Queries 1. Overview In this tutorial, we’ll discuss the different types of JPA queries. Moreover, we’ll focus on comparing the differences between them and expanding on each one’s pros and cons. 2. Setup Firstly, let’s define the UserEntity class we’ll use for all examples in this article:… Continue Reading jpa-queries
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A Guide to Stored Procedures with JPA 1. Introduction In this quick tutorial we’ll explore the use of Stored Procedures within the Java Persistence API (JPA). 2. Project Setup ==== 2.1. Maven Setup We first need to define the following dependencies in our pom.xml: javax.javaee-api – as it includes the… Continue Reading jpa-stored-procedures
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JPA @Basic Annotation 1. Overview In this quick tutorial, we’ll explore the JPA @Basic annotation. We’ll also discuss the difference between @Basic and @Column JPA annotations. 2. Basic Types JPA support various Java data types as persistable fields of an entity, often known as the basic types. A basic type… Continue Reading jpa-basic-annotation
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A Simple Tagging Implementation with JPA 1. Overview Tagging is a standard design pattern that allows us to categorize and filter items in our data model. In this article, we’ll implement tagging using Spring and JPA. We’ll be using Spring Data to accomplish the task. Furthermore, this implementation will be… Continue Reading jpa-tagging
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The DAO with JPA and Spring 1. Overview This article will show how to implement the DAO with Spring and JPA. For the core JPA configuration, see the article about JPA with Spring. 2. No More Spring Templates Starting with Spring 3.1, the JpaTemplate and the corresponding JpaDaoSupport have been… Continue Reading spring-dao-jpa
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JPA/Hibernate Projections 1. Overview In this tutorial, we’ll learn how to project entity properties using JPA and Hibernate. 2. The Entity First, let’s look at the entity we will be using throughout this article: @Entity public class Product { @Id private long id; private String name; private String description; private… Continue Reading jpa-hibernate-projections
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Combining JPA And/Or Criteria Predicates 1. Overview The JPA Criteria API can be used to easily add multiple AND/OR conditions when querying records in a database. In this tutorial, we’ll explore a quick example of JPA criteria queries that combine multiple AND/OR predicates. If you’re not familiar with predicates, we… Continue Reading jpa-and-or-criteria-predicates
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Spring Data JPA and Named Entity Graphs 1. Overview Simply put, Entity Graphs are another way to describe a query in JPA 2.1. We can use them to formulate better-performing queries. In this tutorial, we’re going to learn how to implement Entity Graphs with Spring Data JPA through a simple… Continue Reading spring-data-jpa-named-entity-graphs
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