JPA and Hibernate

Course Introduction

• Administration and Course Materials
• Course Structure and Agenda
• Delegate and Trainer Introductions

Session 1: INTRODUCTION TO HIBERNATE

• The problems with JDBC
• About ORM
• The relationship between JPA and Hibernate
• Hibernate architecture
• Installing Hibernate
• Configuring the SessionFactory (XML and Java)
• Obtaining and using a Session (basic)

Session 2: BASIC ENTITY MAPPING

• About entity mapping
• XML mapping
• Annotation mapping
• Entity types
• Value types
• Embeddable types
• Collections
• Key generation

Session 3: THE HIBERNATE SESSION

• About the Hibernate Session
• Transient, persistent, and detached entity states
• Hibernate transactions
• Using the Session to perform basic CRUD operations

Session 4: COMPOSITE MAPPING

• About composite mapping
• One-to-one
• One-to-many
• Many-to-many
• Uni vs bi-directional associations
• Cascading
• Eager vs lazy fetching
• The n+1 problem

Session 5: INHERITANCE MAPPING

• About inheritance mapping
• Mapped superclass
• Single table
• Joined table
• Table per class
• Polymorphic queries

Session 6: HIBERNATE QUERY LANGAUGE (HQL)

• About Hibernate Query Language (HQL)
• Basic queries
• Querying for a subset of the class's fields
• Literal, ordinal, and named parameters
• Single result queries
• Functions
• Queries with joins
• Eager fetching
• Ordering
• Grouping
• Native queries
• Named queries
• An introduction to criteria queries

Session 7: THE JPA ENTITYMANAGER

• About the JPA EntityManager
• Configuring the EntityManagerFactory (XML and Java)
• Obtaining and using an EntityManager (basic)
• About the Persistence Context
• About the JPA Query Language (JPQL)
• JPA EntityManager vs Hibernate Session

Session 8: PERFORMANCE TUNING

• Discovering performance issues
• Choosing the right fetch type
• Query-specific fetching
• Using Sets, not Lists, for many-to-many associations
• Having the database do the heavy lifting
• First and second-level cache
• Performing bulk updates