Book Image

Spring Persistence with Hibernate

By : Ahmad Seddighi
Book Image

Spring Persistence with Hibernate

By: Ahmad Seddighi

Overview of this book

<p>Spring is the leading platform to build and run enterprise Java applications. Spring's Hibernate integration makes it easy to mix and match persistence methodologies simplifying your Hibernate applications. You can incorporate lots of Inversion of Control (IoC) convenience features to address many typical Hibernate integration issues, making this integration all the more favorable for your application. <br /><br />This easy-to-use book will turn the complex-sounding integration into a straightforward walk-through. Persistence is important for creating a data access-based transactions tier, central to financial, insurance, and banking applications. You will be able to enhance your applications using the most common, advanced, and optional features of Hibernate.<br /><br />This book starts with the philosophy and the brief history of persistence. It provides an introduction to how persistence frameworks and technologies came into the development scene and what problems they are aimed to solve.<br /><br />The book continues with a discussion about Hibernate as the most popular persistence framework in Java. First, you will learn how to get Hibernate and add it to a project and how to configure it before it can be used. Next, you will get an in-depth knowledge about Hibernate and understand the essential concepts behind persistence with Hibernate and more. When Hibernate has been fully discussed, you will get to know Spring as another popular framework in Java, and have a look at essential features of Spring and its added value for Hibernate-based projects. Finally the book will provide a comprehensive discussion about using Hibernate with Spring and the problems that are solved with Spring.</p>
Table of Contents (22 chapters)
Spring Persistence with Hibernate
Credits
About the Author
About the Reviewer
Preface
Index

Cascading operations


A cascading operation indicates how changes to the persistent object affect associated objects when an object is persisted. For instance, if the removed object is associated with other objects, what should happen to the others when the removed object is erased from the database?

I'll explain with an example. Consider the Teacher class in the educational system application. Suppose that each teacher is associated with a single course, meaning the Teacher class has a property of type Course. If we use the TEACHER and COURSE tables, respectively, to store the Teacher and Course objects in the database, then corresponding to each Teacher object is a single Course object, and corresponding to each row in the TEACHER table is a single row in the COURSE table. In this situation, when a Teacher object is removed, what do you expect to happen to its related Course object?

The application's requirements may force you to either delete the associated object or to ignore it. In Hibernate...