Java Training : Fast Track to Enterprise JavaBeans 3.1 (EJB3) and the Java Persistence API V2 (JPA2)

Fast Track to Enterprise JavaBeans 3.1 (EJB3) and the Java Persistence API V2 (JPA2)

Java Training Overview

The Enterprise JavaBeans 3 specification is a deep overhaul of the EJB specification that improved 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 creating distributed, transactional components, and for mapping relational data to an object schema. The EJB 3.1 release is part of the Java EE 6 specification and adds additional refinements and capability.

This course provides thorough coverage of the EJB3 technology - presented in a clear and effective manner. It starts with the basic concepts and APIs of EJB and then continues on with complex topics such as message driven beans and transactions. New concepts such as the use of annotations and the use of Dependency Injection to initialize references are covered in depth. The course also includes thorough coverage of managing persistence using the Java Persistence API 2 (JPA2). This course provides additional coverage of JPA as compared to our Fast Track to EJB3 course.

The coures 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. This course can be customized to your requirements.

Java Training Skills Gained

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 & use stateful & stateless session beans
Use EJB 3 dependency injection to initialize resources
Understand and use Interceptors (Lifecycle and Business Method)
Use JNDI (Java Naming and Directory Interface)
Write EJB clients (remote and local)
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 persistent Entities
Map relational schemas to persistent entities, including the use of primary keys
Understand and use the EntityManager
Understand and use Java Persistence Query Language
Use optimistic locking and versioning
Use advanced JPA capabilities such as entity relationships (1-1, 1-N, N-N, unidirectional, bidirectional), inheritance, and embeddable classes
Learn best practices associated with JPA applications

Hands-On

50% hands-on, 50% lecture

Java Training Course Duration

5 Days

Java Training Course outline

Session 1: Introduction

Overview of EJB and Java Persistence API (JPA)

Goals of EJB, EJB in the Java EE architecture

EJB 3.1 Overview

Session Beans, Persistent Entities, Message Driven Beans

Lab: Server setup and introduction

Session 2: Session Beans

Session Bean Overview

Services provided, Stateless and Stateful Beans
Defining a Session Bean - EJB 3 Annotations
The Bean Implementation, Remote and Local Business Interface

Packaging and Deployment

ejb-jar file, Deployment Descriptors in EJB 3
EAR file
JEE 6 WAR files and EJB
The EJB Container

Lab: Creating a Stateless Session Bean
JNDI Overview

Distributed Naming and Lookup
Context and InitialContext
Using JNDI

Writing an EJB 3 Client

Client View of a Session Bean
JEE 6 Portable EJB Lookup Names
Running the Client

Lab: Creating an EJB Client

Session 3: Additional Capabilities

Resources and Dependency Injection

EJB referencing another EJB
Referencing Resources, Environment Entries
Connection Factories (DataSource and others)

Lab: Using Dependency Injection
Lab: Creating and Using Environment Entries
Session Bean Lifecycle and Interceptors

Stateless Session Bean Lifecycle
Business Method Interceptors, InvocationContext, Lifecycle Callback Interceptors, Interceptor Classes

Lab: Working with Interceptors
Asynchronous Methods, Singleton Session Beans
Stateful Session Beans

Overview
Defining, Client Relationship
Lifecycle, Activation, Passivation

Lab: Stateful Session Beans
Timer Service

Programmatic Timers
Calendar-Based Timers

Lab: Working with Timers

Session 4: Message-Driven Beans

Overview of Messaging Systems

Messaging, Loose Coupling
Pub/Sub, Point2Point

Overview of JMS API

Overview and Structure
ConnectionFactory and Destination
JMS Producer and Consumer Client example
JMS Messages

Message-Driven Beans (MDB)

Overview and Goals
@MessageDriven and MDB example
Configuring with activationConfig
State Diagram and Interceptors

Lab: Message Driven Beans

Session 5: Transactions and Security

Overview of Transactions and Transactional Systems

ACID, Transaction Managers, Resource Managers

Transactions in EJB 3

Declarative Transaction Management
Transaction Attributes and Transactional Scope
Transaction Scenarios and Bean-Managed Tx

Lab: Working with Transactions
Security

Java EE Security Overview (Role-based)
@RolesAllowed, @PermitAll
Programmatic Security

Lab: Integrating EJB and Java EE Security

Session 6: Exceptions

Exception Overview

Checked and Unchecked Exceptions

Exceptions in EJB 3

Application Exceptions, System Exceptions

EJB 3 Best Practices

When to Use, Coarse-Grained Business Interfaces, Session Façade, Transaction Guidelines, Clustering

Session 7: Introduction to Java Persistence API V2 (JPA2 )

Overview

Persistence Layers, Object-Relational Mapping (ORM), JDBC
JPA Overview

Mapping with JPA

Entities and @Entity, ids and @Id,
Generated Id Values
Basic Mapping Types

Lab: Mapping an Entity Class
EntityManager and Persistence Context

Persistence Unit and persistence.xml
Persisting to the DB, the EntityManager,
Injecting an EntityManager
Retrieving Persistent Entities

Lab: Using the EnityManager to persist and find an Entity
More About Mappings
Lab: Refining your Mappings

Session 8: Updates and Queries

Inserting and Updating

Transient, Persistent, Detached, Removed
Persisting new Entities, Updating a Persistent Instance

Lab: Inserting and Updating an Entity
Querying and JPQL
- Object Based Queries, Select statements, WHERE clause
- Named Queries
Lab: Creating and Using JPQL Queries
Criteria API
Lab: Criteria Querying
The Persistence Lifecycle - JPA Entity States, Lifecycle, and Persistence Context
Versioning and Optimistic Locking

Overview
Detached Entities
Creating Versioned Entities

Lab: Optimistic Locking

Session 9: Entity Relationships

Relationships Overview

Object Relationships, Participants, Roles, Directionality, Cardinality

Relationship Mapping

Mapping Overview (1-1, 1-N, N-1, N-N)
Unidirectional and Bidirectional
Mapping One-One, One-Many
Join Columns
Relationship Inverses

Lab: Mapping Entity Relationships

Many-Many Relationships
Lazy and Eager Loading
Cascading
Queries Across Relationships (Inner Joins, Outer Joins, Fetch Joins)

Lab: Querying Across Relationships
Inheritance Mapping

Entity Inheritance
Single Table, Joined (Table per Subclass), Table per Concrete Class
Pros and Cons

Lab: Mapping Inheritance
Other Mapping Capabilities - Embedded Objects, Compound Primary Keys, and Element Collections

Session 10: Additional JPA Capabilities

Queries - Projection, Aggregate, Bulk Update/Delete
Extended Persistence Contexts
XML Mapping Files
EJB and Java SE
Best Practices

Primary Keys, Named Queries, Lazy/Eager Loading, Transactional Semantics, Encapsulation, Report Queries