Enterprise JavaBeans™ 3.0 and the Java Persistence API

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Enterprise JavaBeans 3.0 and the Java Persistence API Training Class Summary

The Enterprise JavaBeans 3.0 specification is a deep overhaul of the EJB specification that is intended to improve the EJB architecture by reducing its complexity from the developer's point of view. It leverages annotations (introduced in Java 5) and Object-Relational Mapping (ORM) technologies to eliminate the dependence on complex EJB APIs, allow POJO (Plain Old Java Object) based development, and provide an effective technology for mapping relational data to an object schema.

This course provides thorough coverage of the EJB3 technology including new concepts such as the use of annotations and the use of Dependency Injection to initialize references. This course also includes in-depth coverage of managing persistence using the Java Persistence API (JPA). It uses hands-on labs and a well-paced approach to make this complex technology understandable in an accelerated fashion. You will come away with a comprehensive understanding of EJB and the important issues that need to be considered to use it in real world applications.

Audience: Java developers who want to use EJB 3.

Prerequisites: One year of Java programming experience (or equivalent) is preferred. Knowledge of relational databases and JDBC is strongly recommended.

Class Length: 4 days

Enterprise JavaBeans 3.0 and the Java Persistence API Training Class Objectives
  • Understand the EJB 3 architecture and API, and how it fits into the overall Java EE architecture.
  • Understand and use the EJB 3 annotations.
  • Create, deploy, and use stateful and stateless session beans.
  • Use EJB 3 dependency injection to initialize resources
  • Understand and use Interceptors.
  • Use the Java Naming and Directory Interface (JNDI).
  • Write remote and local EJB clients.
  • Understand, deploy, and use message-driven beans.
  • Understand distributed transactions, the Java Transaction API, and the EJB transaction model.
  • Understand and use the EJB security model.
  • Understand practical architectural issues associated with EJB applications
  • Understand the new Java Persistence API (JPA).
  • Create, deploy, and use JPA persistence entities.
  • Understand and use the Entity Manager.
  • Use advanced JPA capabilities such as entity relationships, inheritance, and embeddable classes.
Enterprise JavaBeans 3.0 and the Java Persistence API Training Class Outline
  1. Overview
    • What is EJB?
    • EJB Goals
    • Types of Enterprise JavaBeans
    • Java Persistence API
    • EJB and Java EE (Enterprise Editions)
    • EJB in Java EE Architecture
    • SOA and EJB
    • SOA with Web Services and EJB
  2. EJB 3.0
    • EJB 3.0 Overview
    • EJB 2.X Problems
    • EJB 3.0 Goals
    • Session Bean Usage
    • Persistent Entity Usage
    • MDB Usage
  3. Session Bean Overview
    • What are Session Beans?
    • Stateless Session Beans (SLSB)
    • Stateful Session Beans (SFSB)
    • Session Bean can be Distributed
    • Defining a Session Bean
    • Stateless Session Bean Definition
    • Calculator Remote Business Interface
    • Remote and Local Business Interfaces
    • Calculator Bean Local Business Interface
    • A Brief Note on Annotations
    • How Annotations Work
    • Annotation Definition
    • Using Annotations
    • What Else is Needed?
  4. Packaging and Deployment
    • J2EE Packaging
    • EJB-JAR File
    • Deployment Descriptor (DD)
    • Deployment Descriptors in EJB 3
    • EJB-JAR File Structure
    • Enterprise Archive (EAR File)
    • application.xml File
    • Server Deployment
    • EJB Container
    • The EJB Container
    • Server Deployment
  5. JNDI Overview
    • How do Remote Clients get EJB Access?
    • JNDI – Java Naming and Directory Interface
    • EJB Container Binds a Reference into JNDI
    • Client Looks up Reference in JNDI
    • JNDI Tree Structure
    • JNDI API Overview
    • JNDI API
    • The Context Interface
    • The InitialContext Class
    • Specifying the InitialContext Properties
    • Using JNDI
  6. EJB Client
    • Client View of a Session Bean
    • Client Invocation of a Session EJB
    • PortableRemoteObject and Casting
    • Running a Client
  7. Dependency Injection
    • Dependency Injection
    • The JavaTunes Online Music Store
    • An EJB Referencing Another EJB
    • CatalogMaintenance
    • Injection of CatalogMaintenance
    • What is Happening
  8. Deployment Descriptors
    • More About Deployment Descriptors
    • The XML Deployment Descriptor
  9. The EJB Environment
    • Issues with Obtaining Resources
    • Referencing Resources External to EAR
    • Reference & Deployment Descriptor Usage
    • Resolving a JNDI Name
    • Simple Environment Entries
    • Declaring Simple Environment Entries
    • Setter Injection
    • Resource Manager Connection Factories
    • More on the Enterprise Bean Environment
    • The Environment is a Level of Indirection
    • Looking up Resources in the Environment
    • Looking up via EJBContext
    • Looking up via JNDI API
    • More on the @Stateless Annotation
    • More on the @EJB Annotation
    • More on the @Resource Annotation
    • Deployment Descriptor vs Annotation
  10. Stateless Session Bean Lifecycle & Interceptors
    • Stateless Session Bean State Diagram
    • Lifecycle of SSB
    • Client Call of a Stateless SB Method
    • Interceptors
    • Business Method Interceptors
    • InvocationContext Interface Details
    • Interceptor Method Details
    • Interceptor Class
    • Using Interceptor Classes
    • Method Level Interceptors
    • Lifecycle Callback Interceptors
    • Lifecycle Interceptor in the Bean Class
    • Lifecycle Interceptor in a Separate Class
  11. Stateful Session Beans
    • Stateful Session Bean (SFSB) Overview
    • Coding a Stateful Session Bean
    • Stateful Session Bean Clients
    • Stateful Session Bean Removal
    • Stateful Session Passivation/Activation
    • When to Use Stateful Session Beans
    • @PrePassivate and @PostActivate Callbacks
    • Stateful Session Bean State Diagram
  12. The Timer Service
    • Bean Requirements
    • The javax.ejb.Timer Interface
    • The javax.ejb.TimerService Interface
    • How the Timer Works
    • Issues with Using the Timer Service
  13. Overview of Messaging Systems
    • What is Messaging?
    • Loose Coupling
    • When is Messaging Used?
    • Two Messaging Models
    • Publish/Subscribe – Illustrated
    • More on Publish/Subscribe
    • Point-to-Point – Illustrated
    • More on Point-to-Point (P2P)
    • Message Delivery – Push versus Pull
  14. Overview of JMS API
    • What is Java Message Service?
    • API Structure
    • JMS Interfaces
    • Administered Objects
    • Administered Objects and JNDI – Illustrated
    • Client Workflow
    • Synchronous Queue Consumer Client
    • Asynchronous Queue Consumer Client
    • JMS Message Types
    • Message Header Fields
  15. Message-Driven Beans
    • J2EE Message Producers and Consumers
    • Message-Driven Bean (MDB) Overview
    • Goals of Message-Driven Beans
    • MDB Consumption of a Message
    • @MessageDriven Details
    • Activation Configuration Properties
    • Specifying a Destination for an MDB
    • Specifying a Destination Using a DD
  16. Message-Driven Bean Lifecycle
    • Lifecycle Overview
    • MDB State Diagram
    • Interceptor Methods
  17. Transaction Definition
    • Transaction Overview
    • Transaction Lifecycle
    • Transactions Clarify Systems
  18. Transactional System Overview
    • Overview of a Transactional System
    • Transactional System Components
    • Transactional Object
    • EJB Transaction Support
  19. Transactions in EJB
    • EJB Declarative Transaction Management
    • Transactional Scope
    • EJB Transaction Attributes
    • Specifying Transaction Attributes
    • NOTSUPPORTED
    • SUPPORTS
    • REQUIRED
    • REQUIRESNEW
    • MANDATORY
    • NEVER
    • Beans Have a Say in Transactions
    • Beans can be Notified of Transaction Status
    • Transaction Attributes – Some Choices
    • Explicit/Bean-Managed Transactions
    • Transaction Isolation Levels
    • Multi-Process TX and Two Phase Commit
  20. Security in EJB
    • Security Requirements
    • J2EE Security
    • Roles
    • J2EE Security Overview
    • EJB Security Overview
    • Authentication
    • Programmatic Security
    • Transport Level Security with SSL
  21. Exception Handling
    • Overview of Exceptions
    • Exception Hierarchy
    • Application Exceptions in EJB
    • Defining Application Exceptions
    • Container Handling of Application Exception
    • Bean Throwing of Application Exception
    • Client Handling of Application Exceptions
    • System Exceptions Indicate Failure
    • Container Handling of System Exception
    • Client Handling of System Exceptions
  22. EJB 3 Best Practices
    • When to Use EJB
    • Keep Business Interfaces Coarse Grained
    • Session Façade Structure
    • Use Container-Managed Transactions
    • Transaction Duration
    • Local and Remote Business Interface
    • Tuning
    • Session Bean Tuning
    • Clustering
    • Clustering Session Beans
  23. JPA Overview
    • The Issues with Persistence Layers
    • Object-Relational Mapping (ORM) Issues
    • Issues with JDBC Alone
    • Java Persistence API Overview
    • JPA Benefits
    • Java Persistence Environments
  24. Mapping a Simple Class
    • Entity Classes
    • Entity Class Requirements
    • The Entity Declaration
    • The Event Class
    • The Id Property
    • Field Access or Property Access
    • The EVENTS Table
    • Generated Id Property
    • Mapping Properties
    • Basic Mapping Types
    • Persisting to the Database
  25. Entity Manager and Persistence Context
    • The Entity Manager & Persistence Context
    • The EntityManager
    • The EntityManager Interface
    • Persistence Unit
    • Injecting an EntityManager
    • Retrieving Persistent Objects
    • Container-Managed Entity Manager
    • The Persistence Unit
    • persistence.xml
  26. Inserting and Updating
    • Transient, Persistent, Detached Instances
    • Removed Instances
    • Persisting a New Entity
    • Synchronization to the Database
    • Updating a Persistent Instance
    • Detached Entities
  27. Querying and Java Persistence Query Language (JPQL)
    • Java Persistence Query Language
    • JPQL Basics
    • Executing a Query
    • Where Clause
    • Query Parameters
    • Using Query Parameters
    • Named Queries
  28. Versioning/Optimistic Locking
    • Optimistic Locking
    • Using a Detached Instance
    • Versioning
    • Version Property in Java Class
    • Locking Objects
    • Lock Modes
  29. Entity Relationships
    • Relationships Overview
    • Object Relationships
    • Characteristics of Relationships
    • Directionality
    • Characteristics of Relationships
  30. Mapping Relationships
    • Mappings Overview
    • Unidirectional Many-To-One Relationship
    • The Table Structure – Many-To-One
    • The Owning Side
    • @JoinColumn
    • Bidirectional One-To-One Relationship
    • Using the Relationship
    • More on the Inverse Side
    • Bidirectional One-To-Many Relationship
    • Mapping the One-To-Many Relationship
    • Other Collection Types
    • Many-To-Many Relationship
    • Defining Many-To-Many Relationship
    • Mapping Many-To-Many Relationships
    • Specifying the Join Table
    • Lazy and Eager Loading
    • Cascading Operations
    • The Cascade Element
    • Queries Across Relationships
    • OUTER and FETCH JOIN
  31. Mapping Inheritance
    • Entity Inheritance
    • Details of Entity Inheritance
    • Single-Table Strategy
    • Entity Definitions for Single-Table
    • Single Table: Pros and Cons
    • Joined (Table per Subclass)
    • Entity Definitions for Joined
    • Joined: Pros and Cons
    • Table per Concrete Class
  32. Embedded Objects
    • Using Embedded Objects
    • Embeddable Class
    • Reusing Embeddable Classes
    • Overriding Embedded Class Attributes
    • Compound Primary Keys
    • Compound Key with Embedded Id Class
    • Using an Embedded Id Class
    • Compound Key with ID Class
  33. Additional Java Persistence Capabilities
    • More on Querying
    • Projection Queries
    • Aggregate Queries
    • Bulk Update and Delete
    • Native SQL Queries
  34. Extended Persistence Contexts
    • Stateful Session Beans with Entity State
    • Extended Persistence context
    • Issues with Extended Persistence Context
  35. XML Mapping Files
    • XML Mapping Files
    • A Simple Entity Class
    • JPA XML Mapping File
    • JPA XML Mapping File – Mapping Entities
    • JPA XML Mapping File – Named Queries
  36. Java Persistence with Java SE
    • Using JPA with Java SE
    • Java SE APIs
  37. Java Persistance Best Practices
    • Primary Key Considerations
    • Use Named Queries
    • Use Lazy/Eager Loading Appropriately
    • Be Aware of Transaction Semantics
    • Encapsulate JPA Code
    • Use Report Queries Where Applicable
    • Optimize Read-Only/Mostly Data Access
    • Paging Data
    • Consider Going Outside of Java Persistence
    • Know Your Provider Implementation