Spring Persistence with Hibernate

459 Pages·2009·5.658 MB·English

by  Ahmad Seddighi

Spring Persistence with
Hibernate
Build robust and reliable persistence solutions for your
enterprise Java application
Ahmad Reza Seddighi
BIRMINGHAM - MUMBAI
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
Spring Persistence with Hibernate
Copyright © 2009 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval
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critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy
of the information presented. However, the information contained in this book is
sold without warranty, either express or implied. Neither the author, nor Packt
Publishing, and its dealers and distributors will be held liable for any damages
caused or alleged to be caused directly or indirectly by this book.
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companies and products mentioned in this book by the appropriate use of capitals.
However, Packt Publishing cannot guarantee the accuracy of this information.
First published: November 2009
Production Reference: 1201109
Published by Packt Publishing Ltd.
32 Lincoln Road
Olton
Birmingham, B27 6PA, UK.
ISBN 978-1-849510-56-1
www.packtpub.com
Cover Image by Vinayak Chittar ([email protected])
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
Credits
Author Editorial Team Leader
Ahmad Reza Seddighi Akshara Aware
Reviewer Project Team Leader
Luca Masini Priya Mukherji
Acquisition Editor Project Coordinator
Sarah Cullington Zainab Bagasrawala
Development Editor Proofreader
Rakesh Shejwal Joel T. Johnson
Technical Editor Graphics
Pallavi Kachare Nilesh Mohite
Indexer Production Coordinator
Hemangini Bari Shantanu Zagade
Cover Work
Shantanu Zagade
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
About the Author
Ahmad Reza Seddighi is an author, speaker, and consultant in architecting and
developing enterprise software systems. He is an IT graduate from the University of
Isfahan, Iran, and has ten years experience in software development. He currently
lives in Tehran, where he works with a number of small but growing IT companies.
He loves teaching so he grabs any teaching opportunities. He is also the author
of three other books: Core Java Programming, Java Web Development, and Open
Source J2EE Development, all in Farsi.
As the book was going to publish by Apress, and prepared and
made ready by that, I'd like to thank the Apress crew at first. In
particular, Steve Anglin, acquisitions editor; Kylie Johnston, project
manager; Matthew Moodie, reviewing editor; Sumit Pal, technical
reviewer; Nancy Holzner, copyeditor; Elizabeth Berry, production
editor; Brenda Miller, indexer; Gina Rexrode, compositor; April
Eddy, proofreader; and April Milne, artist.

I should also thank the Packt crew, Sarah Cullington, acquisition
editor; Priya Mukherji, project team leader; Rakesh Shejwal,
development editor; Luca Massini, technical reviewer; Pallavi
Kachare, technical editor; Zainab Bagasrawala, project coordinator;
Akshara Aware, editorial team leader; Joel T. Johnson, proofreader;
Nilesh Mohite, graphic organizer; Shantanu Zagade, production
coordinator; Hemangini Bari, indexer; and Shantanu Zagade,
cover work.

Special thanks to Sepehr Fatemi for his support in writing and
reviewing the book, and sincere regards to my family, and specially
my brother, Rohollah, who has always offered excellent support and
encouragement.

In the end, I express my gratitude to all my friends, whom I've not
named here and who have always supported me. Thank you all.
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
About the Reviewer
Luca Masini is a Senior Software Engineer and Architect, born as a game developer
for Commodore 64 (Footbal Manager) and Commodore Amiga (Ken il guerriero),
soon he converted to Object-Oriented programming and for that, from his beginning
in 1995, he was attracted by the Java language.
He worked on this passion as a consultant for the major Italian banks, developing
and integrating the main software projects for which he has often taken the technical
leadership. He was able to lead adoption of Java Enterprise in an environment
where COBOL was the flagship platform, converting them from mainframe
centric to distributed.
He then shifted his eyes toward open-source, starting from Linux and then with
enterprise frameworks, with which he was able to introduce, with low impact, some
concept like IoC, ORM, MVC. For that he was an early adopter of Spring, Hibernate,
Struts, and an entire host of other technologies that in the long run have given his
customers a technological advantage, and therefore development costs cuts.
Lately, however, his attention is completely directed towards the simplification and
standardization of development with Java EE, and for this he is working at the ICT of
a large Italian company to introduce advanced build tools (Maven and Continuous
Integration), archetypes of project and "Agile Development" with plain standards.
Dedicated to my friend Enzo, and our common passion.
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
To my parents
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
Table of Contents
Preface 1
Chapter 1: An Introduction to Hibernate and Spring 7
Persistence management in Java 8
The mismatch problem 9
Identity and equality mismatch 9
Mapping object inheritance mismatch 15
Mapping more complicated objects 17
Object relational mapping 20
Hibernate as an O/R Mapping solution 20
Other O/R Mapping solutions 22
Hibernate versus other frameworks 23
Hibernate architecture 23
What is Spring 25
Inversion of Control container 25
Aspect-oriented programming framework 26
Data access abstraction 26
Transaction abstraction 27
MVC web framework 27
Testing support 27
Summary 28
Chapter 2: Preparing an Application to Use Spring
with Hibernate 29
Setting up the database 30
Getting and installing HSQLDB 30
Configuring and running HSQLDB 30
HSQLDB server modes 31
Managing HSQLDB 32
Getting a Hibernate distribution 34
Getting a Spring distribution 34
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776
Table of Contents
Setting up the project hierarchy 34
Put the required libraries in the lib directory 35
Setting up Ant or Maven in the project 36
Summary 37
Chapter 3: A Quick Tour of Hibernate and Spring 39
Getting started with Hibernate 40
Designing and implementing persistent classes 41
Creating Database Tables 42
Creating mapping metadata 44
A simple client 47
Configuring Hibernate 48
Obtaining a session object 49
Starting a transaction 49
Performing the operation 50
Committing/rolling back the transaction 50
Hibernate declarative configuration 51
Some issues in mapping 53
Caching 53
Querying objects 54
Getting started with Spring 55
A simple case 55
Applying IoC 60
Remove object instantiation and implement the setter method 60
Configure the Student object 61
Obtain the Student instance from Spring 63
Hibernate with Spring 64
Summary 64
Chapter 4: Hibernate Configuration 65
Basic configuration information 65
Hibernate dialect 67
Configuring Hibernate 69
Programmatic configuration 69
Declarative configuration 71
Using a properties file 71
Using an XML file 72
Using a single instance of SessionFactory 74
JPA configuration 76
Summary 78
Chapter 5: Hibernate Mappings 81
Persistent entity classes 82
Having a zero-argument constructor (mandatory) 85
Providing accessors to access class properties (optional) 86
[ ii ]
This material is copyright and is licensed for the sole use by Alison Voyvodich on 4th December 2009
12593 80th Avenue N, , Seminole, , 33776