WebSphere Training : EJB Programming with Rational Application Developer (RAD) v6.0

This course is an advanced introduction to the Enterprise Java Beans (EJB) technology. It starts by introducing the concepts and ideal for someone who has never programmed using EJB. The course rapidly picks up and ends with advanced concepts that students can use in real life to complete large-scale EJB based projects. The development and labs will be based on IBM Rational Application Developer v6, emphasizing the new features of the EJB 2.1 specification.

WebSphere Training Audience

This course is intended for intermediate to advanced Java programmers. System architects will find the advanced concepts especially beneficial in designing a framework.

WebSphere Training Prerequisites

The student is expected to understand the core Java libraries; be familiar with web application programming, including servlets and JSPs; have some experience or understanding of using IBM Rational Application Developer. This course includes a review of RAD Basics, but assumes some knowledge of RAD.

WebSphere Training Learning Objectives

After completing this course, the student should be able to:

Understand the need for EJB
Understand the EJB 2.1 specification at an expert level
Understand how to develop, test, and deploy EJBs with RAD
Gain knowledge of J2EE Design Patterns and Best Practices
Learn the industry secrets in EJB scalability

WebSphere Training Practical Work

Students develop session beans with RAD, including accessing a database from session bean and EJB Java Client. They develop CMP Entity Beans, including EJB/RDB mapping and finder methods. Next, they develop a message-driven bean and integrate Java Message Service (JMS), IBM MQSeries, with RAD. Students also develop access beans. The purpose is to exhibit the use of development, testing, and deployment tools to improve EJB development productivity. The student will deploy a J2EE application to WebSphere Application Server v6.

WebSphere Training Topics

Review of RAD v6 Basics
Introduction to Web Applications and J2EE
Overview of Enterprise Java Beans
Session EJBs
Entity EJBs
EJB and Exceptions
EJB and Transactions
EJB Security
Message-Driven EJBs
J2EE Best Patterns with Focus on EJB
WebSphere V6 administration for programmers
J2EE Design Patterns with Focus on EJB
EJB Inheritance

WebSphere Training Course duration

5 days

WebSphere Training Course outline

0. Agenda

Course Overview
Course Objectives
Agenda – Day 1
Agenda – Day 2
Agenda – Day 3
Agenda – Day 4
Agenda – Day 5
Prerequisites
Environment
Student Introductions

1. Introduction to Rational Application Developer V6.0

Objectives
The WebSphere Studio Family
Eclipse Platform
The WebSphere Studio Product Family
Rational Web Developer
Rational Application Developer
Key Features in RAD v6.0
WebSphere Studio Application Developer Integration Edition
WebSphere Studio Enterprise Developer
Views, Perspective and Editor Areas
Basic Operations with RAD Views and Perspectives
The Java Perspective
The Debug Perspective
Package Explorer
Navigator View
Outline View
Task View
Build and Validation
Templates and Code Completion
Searching
Setup Compiler Class Path
JRE Switching
Import and Export Project
Features of Eclipse 3.0
Eclipse 3.0
Eclipse SDK V3.0
JDK 1.4 – New Features
Control Flow of Logging
Loggers
Logging Example
Logging API - Handlers
Logging API – Formatters & Log Manager
Example Logging Configuration File
JDK 1.4
JDK 1.4 - Assertions
When to use Assertions
Enabling Assertions
Build and Validation
Import and Export Project
Templates and Code Completion
Searching
Setup Compiler Class Path
Summary

2. Introduction to J2EE and Rational Platform

Objectives
Java Web Applications
Java Web Application Architecture
J2EE Architecture
Web Application Programming Model – MVC
An MVC Example
The Infrastructure for Enterprise Web Applications
The IBM WebSphere Platform
Rational Web Developer
Rational Application Developer (RAD)
Background of RAD
WebSphere Application Server
What’s new in WebSphere Application Server v6.0
WebSphere Editions
Services provided by WebSphere Application Server
WebSphere Application Server Architecture
WebSphere Administrative Topology
WebSphere Application Server Components
Server Profile
WAS Administration tools
Administration Changes from v5
RAD J2EE Development
RAD Project Structure
WebSphere Test Environment in RAD
WebSphere Test Environment – steps for test
Set Project Properties
Setup Server Properties
EJB Test Client in RAD
Summary

3. Overview

Objectives
Needs for EJB
Distributed Computing
Distributed Transaction
Distributed Security
What are EJBs?
Main Characteristics of EJBs
EJB Remote Method Call
EJB Architecture Components
EJB Client
EJB JAR File
EJB Server
EJB Container
EJB Container - Persistence
EJB Container - Transaction
Enterprise Java Beans
Session Beans
Entity Beans
EJB Classes and Interfaces
Basic Components of Entity and Session Beans
EJB Home Interface
An EJB Home Interface Example
EJBHome Object
EJB Remote Interface
Remote Interface Example
EJB Local Home Interface
EJB Local Interface
Remote EJB Objects
Local EJB Objects
EJB Implementation Class
EJB Container - Relationships
EJB Container – Relationships…
Remote v. Local EJBs
EJB Application Development
Deploying Enterprise Beans
Major Components of Deployed EJBs
Summary

4. Session Bean

Objectives
Session Beans
Stateless Session Bean
Stateful Session Bean
Components of Session Beans
Home Interfaces
Remote interface
Local interface
The Session Bean Class
ejbCreate() Method
Business Methods
A Simple Stateless Session Bean Example
A Simple Stateful Session Bean Example
Session Context
EJB Context
EJB Context…
Session Bean Lifecycle
Lifecycle - Stateless
Lifecycle - Stateful
Lifecycle – Stateful
Lifecycle - Stateful
Concurrency Issues
Invoking Session Beans from client Application
Looking Up a Home Object
Create an EJB Object
Calling business methods
RAD for EJB Development
Developing a Session Bean using RAD
EJB Project in RAD
Create an EJB project
Examine the EJB project
Create a Session Bean
Code methods
Promote methods to interfaces
Deploying EJBs
EJB Deployment Descriptor
EJB Deployment Descriptor…
Generating Deployed Code
Run on server
JNDI Explorer
Test the home interface
Test the component interface
Exporting EJB JAR
EJB JAR File Structure
Summary

5. EJB 2.1 Changes

Web Service Clients
Component Interface.
Web Service Component Interface
Web Service Client View - Stateless Session Bean
Web Service Client View of Stateless Session Bean
Web Service Client View
Web Service References
Web Service Reference Programming Interfaces
Declaration Of Web Service References
Container-Managed Timer Service
EJB Timer Service
Interaction between Timer Service and EJB
Timer Service API
Timer Service Interface
TimedObject Interface
Working of Timer Service
Timer Interfaces
Timer Interface
TimerHandle Interface
Timer and Transaction
Example Of A TimerBean
Example Of A TimerBean
Limitations of EJB Timer Service
EJB QL Enhancements
Annotation Based EJB Development
@ejb.create-method
@ejb.finder
@ejb.home
@ejb.interface
@ejb.transaction
Annotation Based EJB Development
Create an Annotated Bean Class
Annotation Based EJB Development
Disabling Tag Sets
Disabling Tag Sets
Enhanced EAR File
Enhanced EAR File Editor
Deployment Descriptor Of An Enterprise File
Exporting an Enterprise Application into an EAR File
Exporting an Enterprise Application
Summary

6. Entity Bean

Objectives
Entity Beans
Entity Bean Components
Container
Container…
Primary Key Class
A Primary Key Class Example
(Remote) Home Interface
(Remote) Home Interface…
Local Home Interface
Remote Interface
Local Interface
Entity Bean Class
Entity Instance
Entity Object Lifecycle
Bean Instance Lifecycle
Bean Instance Lifecycle…
Persistence
Bean Managed Persistence
Container Managed Persistence
Writing BMP Bean
Writing BMP Bean…
A BMP Bean Example
A BMP Bean Example…
Writing a CMP Bean
Writing a CMP Bean…
Indicating Persistent Fields
Writing finder methods
EJB Query Language
EJBQL: Simple examples
EJBQL: SELECT clause
EJBQL: SELECT clause…
EJBQL: FROM clause
EJBQL: WHERE clause
EJBQL: WHERE clause…
EJBQL: Watch out!
Using EJBQL in a CMP bean
Business Methods
EntityContext
Writing CMP Beans
Defining and Mapping CMP Fields
A CMP Entity Bean Example
Developing Entity Beans in RAD
Adding a CMP Entity EJB
Adding a CMP Entity EJB…
EJB Deployment Descriptor
Add an EJBQL query
Add an EJBQL query…
Import Database Schema
Copy Database Schema
Creating a database mapping
Choosing a backend
Choosing a mapping type
Specifying the mapping
EJB Relationships
EJB 2.0 Relationships
WebSphere Extensions
Summary

7. EJB Exception

Objectives
Use of Exception
Exception Types
System Exception
System Exception…
Application Exception
Bean Class
Container
Client
Standard Exceptions
Local EJBs
Summary

8. EJB Security

Goals of the EJB Security Specification
Declarative EJB Security – Method Permission
Configure Security Roles
Configure Method Permissions
Generated XML in ejb-jar.xml
Unchecked option
Excludes List
Declarative EJB Security – EJB Delegation Policy
Configuring EJB Delegation Policy with RAD
Programmatic EJB Security
Summary

9. Message-Driven Beans

Objectives
The Trouble with RMI/IIOP
Messaging to the Rescue
Messaging Features
Message-Oriented Middleware
Messaging Domains
Publish/Subscribe
Point-to-Point
Java Message Service
JMS Programming: Overview
JMS Programming: Overview…
The JMS Interfaces
JMS Programming: Example
JMS Programming: Example…
Integrating JMS and EJB
Message-Driven Beans Are Different From Other EJBs
Message-Driven Beans Cannot Talk to Their Clients
Message-Driven Beans are Stateless
Durable Subscription
Message-Driven Bean Interfaces
javax.ejb.MessageDrivenBean
javax.jms.MessageListener
javax.jms.Message
Lifecycle
Example: Message Counter
Class MessageCounter
Class MessageCounter…
Processing the Message
Deployment Descriptor Entry
Binding the Queue or Topic
JMS in RAD
Configure a Service Integration Bus in RAD
Configure a Service Integration Bus
Add Application Server as Bus Member
Create a Queue
Create a Queue cont…
Configure the JMS Resources
Configure Connection Factory
Configure a Queue
Configure Activation Specification
Configure the Activation for MDB
Transactions
Security
Load Balancing
Clustering and Topics
Clustering and Queues
A Few Tips
Poison Messages
How the Programmer Can Avoid Poison Messages
How the System Administrator Can Avoid Poison Messages
Building a Response
Potential Problems
A Simple Alternative
Type Checking and Messages
Testing Message-Driven Beans
Summary
References

10. Best Practices

Objectives
Remove Stateful Session Beans
Identifying Read-Only Methods are not required any more
Reduce the Transaction Isolation Level where possible
CMP EJB Access Intent
DataSource Isolation Level
Do Not Mix Isolation Levels
Access Entity Beans from Session Bean
Reuse EJB Homes
Avoid two-phase commit if possible
Avoid transactions for non-transactional methods
Avoid Stateful Session EJBs
CMP Pooling
Use Access Beans
Types of Access Beans
Access Bean Constructor
Generating Access Beans
Access Bean Examples
Do not store large Object Graphs in HttpSession
Release HTTP Sessions
Use JDBC Connection Pooling
Release JDBC Resources
Turn off reloading of web applications
Make upstream queues progressively smaller
Avoid String Concatenations
Minimize Synchronization
RAD Best Practices

11. EJB Transaction

Transaction Management
Object Transaction
EJB Transaction Basics
Transaction Propagation
Client Managed Transaction
Bean Managed Transaction
Container Managed Transaction
Transaction Outcome
Vetoing a Transaction
Vetoing a Transaction…
Transaction Isolation
Isolation Level
Setting Isolation Level for EJB
CMP EJB Access Intent
Setting Access Intent
Setting Data Source Isolation Level
EJB Transaction Type in RAD

12. EJB Design Patterns

EJB Design Patterns
Types of EJB patterns
Session Façade Pattern
Session Façade
Session Facade
Session façade pattern shortcomings
Message Façade Pattern
Message Façade
Message façade pattern shortcomings
EJB Command pattern
EJB Command
EJB Command pattern shortcomings
Generic Attribute Access pattern
Generic Attribute Access
Data Transfer Object (DTO)
Data Transfer Rowset
Version Number pattern
Version Number Pattern
Fast Lane Pattern
Data Access Command Beans
EJBHomeFactory
Business Delegate
Sequence Blocks
Stored Procedures for Autogenerated Keys
Summary

13. Basic Administration

Topics
Administration Mechanism
Administration Roles
Administration Roles…
Administration Clients
A Look at the Console
Creating a Profile
wasprofile command (Command line)
Managing an Application Server
Enable Server Process Restart
Sample inittab contents
Basic Application Server Configuration
Configure the JVM
Web Container Transport Chain
Configure Transport Chain
Configure Session Management
Configure an EJB Container
Preparing to Host Applications
Resource Scope and Variables
Configure a Virtual Host
Configure a JDBC Provider
Select JDBC Provider Type
JDBC Provider Options
Data Source
WebSphere Data Source
Creating a Data Source
Configuring a Data Source
Mail Providers
Launching the Administrative Console
The Administrative Console
Installing an Enterprise Application into WebSphere Application Server
Installing an Enterprise Application into WebSphere Application Server…
Saving the Master Configuration
Configuring the Web Server plugin
WebSphere Applications on the file system
What is the Plugin?
What is the Plugin Configuration?
Generating the Plugin Configuration
Use the Plugin Configuration
View the Plugin Configuration
The Plugin
Summary

Appendix A. EJB Inheritance

The Need For EJB Inheritance
EJB Inheritance
Characteristics of a Child EJB
Table Mappings
Single Table Mapping
Root/Leaf Table Mapping
Guidelines and Limitations
ibm-ejb-jar-ext.xmi
Creating EJB Inheritance
Mapping To RDB: Parent
Mapping To RDB: Child

Appendix B. Business and Integration Tier Patterns

Objectives
Business Delegate Pattern
How it works
Data Transfer Object Pattern
DTO Example (Output)
DTO Example (Input)
Role of DTO in MVC
Access Beans
Types of Access Beans
Data Class Access Bean
Data Class Programming Model
Access Bean Constructor
Generating Access Beans
Generating a Data Class
Generating an EJB Factory
Using EJB Factory and Data Class
Deleting the Access Bean
Value Object Pattern
Multiple Value Objects
Best Practice – derive EJB from the Value Object
Composite Entity Pattern
An example
Class Diagram
How the client interacts
Value Object Assembler
Value List Handler
How does it work?
How does it work - continued
Design Considerations
Service Locator
DAO
Service Activator
MDB- Integrating JMS and EJB
Message-Driven Beans Are Different From Other EJBs
Message-Driven Beans are Stateless
Message-Driven Bean Interfaces
Example: Message Counter
Class MessageCounter
Class MessageCounter…
Processing the Message
Deployment Descriptor Entry
Summary

Minimum Hardware Requirements

866Mhz Pentium III
1GB RAM minimum 1.5GB recommended.
15 GB free on the C drive.
Ethernet or Token Ring card
CD-ROM drive
Network connectivity to the internet

Minimum Software Requirements

Microsoft Windows 2000 SP4
Adobe Acrobat Reader 6.0
Netscape 4.7 / Internet Explorer 5.0 (or higher)
IBM DB2 V8.1 Enterprise Edition
Rational Application Developer v6 (RAD 6)
IBM Websphere Application Server v6 (WAS 6)

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