Introduction to Hibernate

Audience	Developers and other advanced Java professionals that will be designing, developing and creating enterprise-wide applications using Hibernate.
Duration	4 Days
Course Abstract	This course utilizes a combination of instructor-led discussions and interactive workshops to demonstrate the advantages of using Hibernate for enterprise application development. This course will focus on: Hibernate architecture, various classes, use of Configuration and Session Factories, persistence management and object states, mapping associations, use of HQL, performance issues, patterns and best practices and the transaction processing aspects.
Objectives	After completing this course, students will be understand the following: Understand the capabilities of using Hibernate Define the Hibernate architecture Understand the role of Configuration and Session Factory Depict the persistence management aspects of Hibernate Illustrate different mapping associations Discussion of subclassing and inheritance Illustrate the use of Hibernate Query Language (HQL) in enterprise applications Discuss fetching strategies and performance impacts Demonstrate the importance of caching Understand the role of JDBC and JTA transactions Illustrate the handling of transaction failures Demonstrate different associated tools: POJO, Ant and Eclipse plugins
Class Format	Lecture and Lab
Prerequisites	Each student should have a basic understanding of the internet and have been exposed to the Java programming language.
Course Topics	The following list represents the sections and topics discussed in this virtual instructor-led course offering.
	Introduction • Classroom logistics • Course overview • Tools and software discussion Hibernate Overview • Object Relational mismatch • What is an ORM? • Alternatives to Hibernate (EJB, IBatis, JDBC) • Hibernate architecture overview • Introduction to Hibernate classes Configuration and Session Factory • Discussion of Configuration object • Discussion of Session Factory object • Configuration properties • JDBC properties • Other properties • Building a Configuration • Programmatically • Using .properties file • Using XML configuration file • Combining build methods • Reusing the Session Factory • Threadlocal variable pattern Session • Persistence management • HelloWorld example • Simple Employee mapping • CRUD examples • insert • get vs. load • update • delete • Review of Javadoc for Session • Object States • Review of State Transition diagram • Transient state • Persistent state • Detached state • Maintaining object identity • Re-attaching detached objects Mapping Associations • Entity types • Value types • Components • Hibernate Types • Custom value types Advanced Mappings • Subclasses and inheritance • Other mappings Query and Criteria • Hibernate Query Language (HQL) • WHERE clause • Sorting • Projections • Criteria queries Fetching Strategies and Performance • Review of Hibernate fetching • Strategies for JOIN, SUBSELECT, BATCH • Lazy initialization • Transitive persistence • Cascade feature • Impact of fetching strategies Caching (Using EhCache) • Cache concepts • First Level Cache • Second Level Cache •Cache Modes •Using statistics to monitor cache •EhCache Configuration Patterns and Best Practices • Threadlocal pattern • Save Session in View • DAO Pattern