Java Training : Fast Track to Hibernate: Using Hibernate For Java Database Access

Fast Track to Hibernate: Using Hibernate For Java Database Access

Java Training Overview

Hibernate is an open source object/relational (OR) persistence and query service for Java. Hibernate lets you develop persistent classes following common Java idioms - including association, inheritance, polymorphism, composition and the Java collections framework.

The Hibernate Query Language, designed as a minimal object-oriented extension to SQL, provides an elegant bridge between the object and relational worlds. Hibernate also allows you to express queries using native SQL or Java-based Criteria and Example queries.

Hibernate is now the most popular OR mapping solutions for Java, and it has become a de facto standard in Java OR mapping. JBoss has integrated Hibernate into its JEMS (Java Enterprise Middleware System) product line.

The Java Persistence API (EJB 3) specification derives a great deal of its architecture from Hibernate, and the Hibernate annotations are compatible with the Java Persistence annotations. This promises to make Hibernate an even more important technology.

This course covers everything you need to know to begin working with Hibernate in a very short time. It covers all the important concepts necessary to access and update data stored in relational databases. It includes an extensive series of labs to exercise all major capabilities.

Java Training Skills Gained

Understand the benefits of Hibernate

Understand the Hibernate architecture

Create Hibernate based applications

Understand and use Hibernate mapping to map persistent objects to the database

Understand and work with collections & associations

Value and Entity Types
Bidrectional and unidirectional
1-1, 1-N, N-N

Use Hibernate's versioning support

Map inheritance hierarchies using Hibernate

Work with Hibernate queries, HQL, and Criteria

Performance tune your Hibernate applications

Understand Hibernate transaction support

Understand the relationship between Hibernate and the Java Persistence API (JPA)

Use the JPA annotations to do OR mapping

Configure second level caching

Integrate Hibernate with Java Web Apps and EJB

Integrate Hibernate and Spring

Hands-On

50% hands-on, 50% lecture

Supported Platforms

Java 5, 6, and 7, Eclipse, IBM RAD, other major platforms

Java Training Course Duration

3 days - 4 days (with Spring integration)

Java Training Course outline

Session 1: Introduction to Hibernate

Issues with Persistence layers and Object-Relational Mapping (ORM)
Hibernate Overview and Benefits
Hibernate architecture overview
Configuring Hibernate
- hibernate.cfg.xml file, Connection properties, Database dialect
- SessionFactory, Configuration, and Session
Mapping a Class
- Persistent Entity Class, Hibernate Mapping File, Mapping the Entity Class
- Primary keys: Id property, Generated Id
- Hibernate Type System
Working with sessions and Persistent Objects
Logging: hibernate.show_sql, log4j Overview and configuration for Hibernate

Session 2: Updates and Queries

Inserting, Updating, and Deleting Entities
HQL - Hibernate Query Language Overview
The Query Interface
Creating and working with queries
Named Queries, Projection Queries, Aggregate Queries

Session 3: The Persistence Lifecycle

Transaction Overview and Transactions in Hibernate
Hibernate Transaction API (in Managed and Non-managed Environments)
The lifecycle of managed objects
Persistent, transient, and detached objects
The Persistence (Session) Context (Lifespan, Relation to Managed Objects, Propagation)
Contextual Sessions
Synchronization to the Database
The Session as cache
Optimistic Locking / Versioning
- Detached Objects and Optimistic Locking
- Versioning overview and Using Versioning
- Locking Objects

Session 4: Relationships

Object Relationship Overview
Mapping Collections of Value Objects
Entity Relationships: 1-N, N-1, N-N, 1-1
Mapping Entity Relationships
Uni and Bi-directional Relationships
The Relationship "inverse"
Cascading Over Relationships
Queries Across Relationships (Lazy and Eager)
Inheritance Mapping
- Entity Inheritance with Hibernate
- Table-per-class mapping
- Table per Subclass mapping
- Table per Concrete Class mapping

Session 5: Additional Querying Capabilities

Projection Queries, Aggregate queries, Bulk updates and deletes, Native SQL Queries
Query Filters
The Criteria API
- Overview of the Criteria API
- Working Querying with the Criteria API
- Query by Example

Session 6: Hibernate and Java Persistence / EJB 3

Overview of Java Persistence / EJB 3
Relationship between Java Persistence and Hibernate
Mapping Entities with JPA Annotations
The EntityManager, Persistence Context and Persistence Unit
Working with Transactions - EntityTransaction, Managed, and Unmanaged Environments
Inserts and Updates
JPQL - Java Persistence Query Language
Versioning
Relationships

Session 7: Caching

Understand caching advantages and behavior
The persistence context as first level cache
The Second Level Cache
Entity and Collection Caching

Session 8: Integration Considerations

Data Access Objects
Integrating Hibernate and Java Web Apps
Open Session in View Pattern
Hibernate / EJB-JPA Integration

Session 9: Additional Topics

Components and Multi-Table Mapping
equals() and hashCode()
Design Considerations
Hibernate Toolset

Session 10: Hibernate and Spring Integration

Spring Introduction
Dependency Injection Overview
Spring's Hibernate Support
Spring Transaction Management