118.  Java Persistence with Hibernate

Rev. 3.2.1

 

This course is now available directly from our partner, Capstone Courseware.

This course develops skills in using the Object/Relational Mapping tool Hibernate. The course uses the latest release version of Hibernate, 3.2, which is directly related to the new EJB 3.0 version defined in Java EE 5.0.

 

By the end of the course, students will be prepared to set-up and use Hibernate as the persistence mechanism in Java applications.

 

LEARNING OBJECTIVES

 

·         Configure Hibernate using both properties files and XML documents.

·         Create mapping documents for Java classes.

·         Define object relationships and build mapping documents to model them.

·         Use components to model composition relationships in the object model.

·         Work with one-to-one, many-to-one, and many-to-many relationships.

·         Evaluate the different approaches to modeling inheritance and polymorphism in database schema.

·         Build Java applications that use Hibernate to create, retrieve, update, and delete objects.

·         Use Hibernate's Criteria Query API to do searches and Query By Example.

·         Work with Hibernate Query Language (HQL) to generate object-based SQL.

·         Understand Hibernate sessions and transactions and their impact on performance.

 

Course Duration:  2 days.

 

Prerequisites: 

·         Intermediate knowledge of Java programming; Course 103 is excellent preparation

·         Some familiarity with SQL, relational databases, and the Java Database Connectivity (JDBC) interfaces will be helpful; Course 168 is an optional precursor to this course

 

1.      Introduction to Hibernate

The Object/Relational Mapping Problem

JDBC

The Hibernate Alternative

Hibernate Architecture and API

 

2.      Configuring Hibernate

The Hibernate Distribution

Required Libraries

Configuration Files

hibernate.properties

hibernate.cfg.xml

Programmatic Configuration

 

3.      Hibernate Persistence

The SessionFactory Interface

Object States

The Session Interface

Transactions

Session Duration

The Data Access Object Pattern

 

4.      Object/Relational Mapping

O/R Mapping Issues

The Mapping Vocabulary

Primary Keys and Identity

ID Generators

Mapping Associations

Unidirectional and Bidirectional Associations

Managing Cardinality

Strategies for Mapping Inheritance

 

5.      The Criteria Query API

Criteria Queries

The Criteria Interface

Using Restrictions

Windowing Results

Sorting

Traversing Associations

Projections and Aggregates

Grouping

Query By Example (QBE)

 

6.      Hibernate Query Language (HQL)

Building HQL Queries

The Select Clause

The Where Clause

Named and Entity Parameters

Associations and Aggregates

Bulk Updates and Deletes

Named Queries

Using Native SQL

 

Appendix A.  Learning Resources

 

System Requirements

 

Hardware – minimal:                     500 MHz, 256 meg RAM, 500 meg disk space

 

Hardware – recommended:           1.5 GHz, 512 meg RAM, 1 gig disk space.

 

Operating system:                          Tested on Windows XP Professional. Course software should be viable on all systems which support a J2SE 5.0 JDK..

 

Software:                                       All free downloadable tools.