Book Image

Mastering Hibernate

By : Ramin Rad, Koushik Srinivas Kothagal
Book Image

Mastering Hibernate

By: Ramin Rad, Koushik Srinivas Kothagal

Overview of this book

Hibernate has been so successful since its inception that it even influenced the Java Enterprise Edition specification in that the Java Persistence API was dramatically changed to do it the Hibernate way. Hibernate is the tool that solves the complex problem of Object Relational Mapping. It can be used in both Java Enterprise applications as well as .Net applications. Additionally, it can be used for both SQL and NoSQL data stores. Some developers learn the basics of Hibernate and hit the ground quickly. But when demands go beyond the basics, they take a reactive approach instead of learning the fundamentals and core concepts. However, the secret to success for any good developer is knowing and understanding the tools at your disposal. It’s time to learn about your tool to use it better This book first explores the internals of Hibernate by discussing what occurs inside a Hibernate session and how Entities are managed. Then, we cover core topics such as mapping, querying, caching, and we demonstrate how to use a wide range of very useful annotations. Additionally, you will learn how to create event listeners or interceptors utilizing the improved architecture in the latest version of Hibernate.
Table of Contents (16 chapters)

Chapter 3. Working with Annotations

In this chapter, we will look at various annotations and how they are used. Most Hibernate and JPA annotations were created for a specific purpose. For that reason, annotations discussed in this chapter are grouped together according to what they are used for. Some annotations are specified in JPA and some are only available in Hibernate. We will mostly focus on Hibernate annotations, specifically the ones that are not documented well or may be tricky to use. The discussion on annotations is grouped based on the following:

  • Mapping and association

  • Behavior

  • The SQL/DDL modifier

You may have noticed that so far we have avoided the Hibernate configuration file and mostly focused on annotations. This is actually the goal throughout this book, since most developers prefer using annotations. In this chapter, we will pay closer attention to some important annotations.