Spring Persistence with Hibernate

Contents at a Glance

Table of Contents

About the Authors

About the Technical Reviewer

Acknowledgments

Preface

CHAPTER 1 Architecting Your Application with Spring, Hibernate, and Patterns

The Benefit of a Consistent Approach

The Significance of Dependency Injection

A Synergistic Partnership

The Story of Spring’s and Hibernate’s Success

A Better Approach for Integration

Best Practices for Architecting an Application

The Layers of a Persistence Tier

The Domain Model

The Data Access Object (DAO) Layer

The Service Facade

Leveraging Declarative Transactions

Understanding Aspect Oriented Programming (AOP)

Simplifying Transactions

The Benefit of Coding to Interfaces

Testing your Persistence Tier

Advanced Features and Performance Tuning

Hibernate-Search

Building a REST Web Service

Other Persistence Design Patterns

The Template Pattern

The Active-Record Pattern

Summary

CHAPTER 2 Spring Basics

Exploring Spring’s Architecture

The Application Context

Beans, Beans, the Magical Fruit

The Spring Life Cycle

Understanding Bean Scopes

Dependency Injection and Inversion of Control

Setter-Based Dependency Injection

Constructor-Based Dependency Injection

Instance Collaboration

Coding to Interfaces

Dependency Injection via Autowiring

@Annotation-Based Dependency Injection

Set It and Forget It!

Injecting Code Using AOP and Interceptors

Summary

CHAPTER 3 Basic Application Setup

Application Management with Maven

Managed Dependencies

Standard Directory Structure

POM Deconstruction

Spring Configuration

Namespace Support

Externalizing Property Configurations

Component Scanning

Import Statements

Database Integration

JDBC Support

Integration with JNDI

Web Application Configuration

Servlet Definition

Spring MVC

Summary

CHAPTER 4 Persistence with Hibernate

The Evolution of Database Persistence in Java

EJB, JDO, and JPA

How Hibernate Fits In

JPA Interface Hierarchy

The Art Gallery Domain Model and DAO Structure

An @Entity-Annotated POJO

Simplified DAO Pattern with Generics

The Life Cycle of a JPA Entity

JPA Configuration

Bare-Bones JPA Setup

Spring Integration

Summary

CHAPTER 5 Domain Model Fundamentals

Understanding Associations

Building the Domain Model

Convention over Configuration

Managing Entity Identifiers

Using Cascading Options to Establish Data Relationships

Adding Second-Level Caching

Using Polymorphism with Hibernate

Summary

CHAPTER 6 DAOs and Querying

A Basic Hibernate DAO Implementation

Building a DAO

Using Spring’s Hibernate Support Classes

Enabling Query Caching with the HibernateTemplate

Going Template-less

Querying in Hibernate

Loading an Entity

Querying for a Particular Type

Using Named Parameters

Querying Using Core Hibernate

Using Named Queries

Working with Polymorphic Queries

Persisting Data with Hibernate

Saving and Updating Data

Handling Binary Data

Understanding the Benefits of the Criteria API

Using the JPA 2.0 Criteria API

Summary

CHAPTER 7 Transaction Management

The Joy of ACID

Understanding Isolation Levels

Serializable

Repeatable Read

Read Committed

Read Uncommitted

Controlling ACID Reflux

Platform Transaction Management

Declarative Transaction Management

Transactional Annotations

Declarative Transactions via XML

Programmatic Transaction Management

Transactional Examples

Creating a Batch Application

Using Two Datasources

Summary

CHAPTER 8 Effective Testing

Unit, Integration, and Functional Testing

Using JUnit for Effective Testing

Unit Testing with Mocks

Spring Dependency Injection and Testing

Testing with a Database

Summary

CHAPTER 9 Best Practices and AdvancedTechniques

Lazy Loading Issues

The N+1 Selects Problem

Less Lazy Mappings

Batching for Performance

Lazy Initialization Exceptions

Now Open Late: Keeping EntityManager Open Past Its Bedtime

Applying the Open EntityManager Filter

Caching

Integrating a Caching Implementation

Determining Caching Rules

Configuring Cache Regions

Caching Your Queries

Caching in a Clustered Configuration

Cluster Caching and Replication Mechanics

Configuring Replication

Summary

CHAPTER 10 Integration Frameworks

RESTful Web Services with Spring

Nouns, Verbs, and Content-Types

Serializing the Object Graph

Using the Dreaded DTO Pattern

Bootstrapping Dozer

Building the DTO Layer

Configuring Dozer with Spring

Making the Mapping Happen

Leveraging Spring 3’s REST Support

Marshaling Data with Spring OXM

Handling Concurrency

Optimistic Locking

Pessimistic Locking

Free-Text Search

Introducing Lucene

Indexing with Lucene

Querying with Lucene

Introducing Hibernate Search

Integrating Hibernate Search

Adding Hibernate Search Annotations

Putting Lucene and Hibernate in Sync

Building a Domain-Specific Search

Summary

CHAPTER 11 GORM and Grails

A Crash Course in Groovy

Letting Your Types Loose

GStrings—Strings on Steroids

Default Constructors in Groovy

Closures in Groovy

Getting Grails Running

Installing Grails

Creating a Grails Application

Configuring Your Application

Configuring Your Datasource

Mapping URLs

Defining the Grails Domain Model

Adding Constraints and Validation

Defining Associations and Properties

Customizing Domain Class Hibernate Mappings

Using Active Record As an Alternative to DAOs

Looking Under the Hood of GORM

Working with Dynamic Finder Methods

Creating Advanced Query Methods

Using the Criteria API

Handling Associations in Grails

Scaffolding and Building Your Grails Application

Defining a Transactional Service Layer in Grails

Summary

CHAPTER 12 Spring Roo

What Roo Is (and What It Is Not)

Creating a Domain Model with Roo

Getting Started with Roo

Creating a New Project

Adding Entities

Adding Fields

Exploring the Automatically Generated Testing Infrastructure

Mapping Associations

Modeling Inheritance

Adding Spring MVC

Adding Service Layers and DAOs

Now You See Me, Now You Don’t—Removing Roo

Summary

Index