Java EE (4) -- Java EE 6 Java Persistence API Developer Certified Expert(1z0-898)

Overview of the Java Persistence API

• Describe the basics of Object Relational Mapping (ORM)
• Define the key concepts of the Java Persistence API (entity, entity manager, and persistence unit)

Introducing the Auction Application

• Describe the auction application
• Define the domain objects of the auction application
• Describe the implementation model for the auction system

Java Persistence API Entities

• Describe the difference between objects and entities
• Describe the difference between persistent fields and properties
• Identify and use common Java Persistence API annotations, such as @Entity, @Id, @Table, and @Column

Understanding the Entity Manager

• Describe the relationship between an entity manager, a persistence context, and a persistence unit
• Describe the difference between a container-managed entity manager and an application-managed entity manager
• Describe the entity life cycle

Modeling Entity Relationships

• Examine association relationships in the data and object models
• Use relationship properties to define associations
• Implement one-to-one unidirectional associations
• Implement one-to-one bidirectional associations
• Implement many-to-one/one-to-many bidirectional associations
• Implement many-to-many bidirectional associations
• Implement many-to-many unidirectional associations
• Examine fetch and cascade mode settings

Entity Inheritance and Object-Relational Mapping

• Examine entity inheritance
• Examining object/relational inheritance hierarchy mapping strategies
• Inherit from an entity class
• Inherit using a mapped superclass
• Inherit from a non-entity class
• Examine inheritance mapping strategies
• Use an embeddable class

Persisting Enums and Collections

• Persist entities that contain enums with @Enumerated
• Persist entities that contain lists with @ElementCollection
• Persist entities that contain maps with @ElementCollection

Introduction to Querying

• Find an Entity by its primary key
• Understand basic Java Persistence API query language queries
• Understand native SQL queries
• Understand basic Criteria API queries

Using the Java Persistence API Query Language

• Examine the Java Persistence API query language
• Create and use the SELECT statement
• Create and use the UPDATE statement
• Create and use the DELETE statement

Using the Java Persistence API Criteria API

• Contrast queries that use the Criteria API with queries that use the Java Persistence query language
• Describe the metamodel object approach to querying
• Create Criteria API queries

Using the Java Persistence API in a Container

• Use the Java Persistence API from a servlet
• Use the Java Persistence API from a stateless session bean

Implementing Transactions and Locking

• Describe the transaction demarcation management
• Implement container-managed transactions (CMT)
• Interact programmatically with an ongoing CMT transaction
• Implement bean-managed transactions (BMT)
• Apply transactions to the Java Persistence API

Advanced Java Persistence API Concepts

• Specify composite primary keys
• Override mappings with the @AttributeOverride and @AssociationOverride annotations
• Understand entity listeners and callback methods