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)

Behavior


In this section, we look at those annotations that affect the behavior of the entity.

@Cache

When you enable second-level cache, you can mark an entity as cacheable. In JPA, you can't specify a strategy, and the only strategy that is supported is READ_ONLY; refer to @Cacheable in JPA docs. Hibernate offers the capability to specify other strategies, besides READ_ONLY. We will see more on this in Chapter 5, Hibernate Cache.

@Access

The @Access annotation is a JPA annotation and is used to specify how to access a class field. By default, fields are accessed directly, typically using reflection, depending on the visibility of a field. But in some cases, you may want to perform additional work in the property accessor methods, such as getters and setters. In that case, you can instruct JPA (in this case, Hibernate) to not access the fields directly and use the accessor methods instead. (Refer to the access method of field and property in the JavaBeans™ specifications.)

You can annotate the...