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 batch processing

Sometimes, we need to save a large number of records in the database. Let's say we need 10,000 records in the database, and we use the basic approach to save the records. The way to do this is as follows:

Session session = SessionFactory.openSession();
Transaction tx = session.beginTransaction();
for ( int i=0; i<100000; i++ ) {
    Employee employee = new Employee(.....);;

Two known issues in the preceding method are as follows:

  • Hibernate will try to save each object to the database one by one; this will be time consuming and may increase the load on the database and application as well

  • The application may face OutOfMemoryException because hibernate saves all the new employee objects in the second-level cache

To overcome these problems and to make the application faster, we need to use batch processing. Hibernate supports batch processing, which is the same as a JDBC batch processing.

Getting ready