Book Image

Java Hibernate Cookbook

By : Yogesh Prajapati, Vishal Ranapariya
Book Image

Java Hibernate Cookbook

By: Yogesh Prajapati, Vishal Ranapariya

Overview of this book

This book will provide a useful hands-on guide to Hibernate to accomplish the development of a real-time Hibernate application. We will start with the basics of Hibernate, which include setting up Hibernate – the pre-requisites and multiple ways of configuring Hibernate using Java. We will then dive deep into the fundamentals of Hibernate such as SessionFactory, session, criteria, working with objects and criteria. This will help a developer have a better understanding of how Hibernate works and what needs to be done to run a Hibernate application. Moving on, we will learn how to work with annotations, associations and collections. In the final chapters, we will see explore querying, advanced Hibernate concepts and integration with other frameworks.
Table of Contents (15 chapters)
Java Hibernate Cookbook
About the Authors
About the Reviewers

Working with the versioning of objects

Once a record is inserted in the database, we can update it any number of times. The versioning feature of hibernate is useful when we want to know how many times a particular record has been modified. This feature is useful in sensitive applications in the finance domain, where we need to record each and every data movement.

When we use the versioning feature, hibernate inserts the initial version number as zero. Whenever a record is modified, the value of the version is increased by one.

Getting ready

To work with the versioning concept, we have to make a small change in the POJO. We have to create a field with the numeric type and declare this field with the @version annotation so that hibernate will consider it to be the versioning column.

Creating the classes

The following code shows the Java file changes for versioning:

Source file:

@Table(name = "employee")
public class Employee {

  @Column(name = "id...