Contents

Title and Copyright Information

Send Us Your Comments

Preface

1 EJB Overview

New Features of EJB 2.0

Local Interface Support

Home Interface Business Methods

Message-Driven Beans

Enterprise JavaBeans Query Language (EJB QL)

CMP Relationships

CORBA Support - RMI-over-IIOP

Invoking Enterprise JavaBeans

Implementing an EJB

Bean Implementation

Parameter Passing

Parameter Objects

Types of EJBs

Session Beans

Entity Beans

Message-Driven Beans

Difference Between Session and Entity Beans

2 An EJB Primer For OC4J

Develop EJBs

Create the Development Directory

Implement the EJB

Create the Deployment Descriptor

Archive the EJB Application

Prepare the EJB Application for Assembly

Modify the Application.XML File

Create the EAR File

Deploy the Enterprise Application to OC4J

Access the EJB

3 CMP Entity Beans

Entity Bean Overview

Creating Entity Beans

Home Interface

Component Interfaces

Entity Bean Class

Primary Key

Defining the Primary Key in a Class

Defining an Auto-Generated Primary Key

Persistence Fields

Default Mapping of Persistent Fields to the Database

Explicit Mapping of Persistent Fields to the Database

CMP Types

Simple Data Types

Serializable Classes

Other Entity Beans or Collections

4 Entity Relationship Mapping

Defining Entity-To-Entity Relationships

Choosing Cardinality and Direction

Defining Relationships

Mapping Relationship Fields to the Database

Default Mapping of Relationship Fields to the Database

Explicit Mapping of Relationship Fields to the Database

5 EJB Query Language

EJB QL Overview

Query Methods Overview

Finder Methods

Select Methods

Deployment Descriptor Semantics

Finder Method Example

Select Method Example

6 BMP Entity Beans

Creating BMP Entity Beans

Component and Home Interfaces

BMP Entity Bean Implementation

The ejbCreate Implementation

The ejbFindByPrimaryKey Implementation

Other Finder Methods

The ejbStore Implementation

The ejbLoad Implementation

The ejbPassivate Implementation

The ejbActivate Implementation

The ejbRemove Implementation

Modify XML Deployment Descriptors

Create Database Table and Columns for Entity Data

7 Message-Driven Beans

MDB Overview

Creating MDBs

Install And Configure The Resource Provider

Bean Class Implementation

Configure Deployment Descriptors

Deploy the Entity Bean

Accessing MDBs

Using Logical Names in the JMS JNDI Lookup

8 Advanced EJB Subjects

Accessing EJBs

Client Installation of OC4J.JAR

EJB Reference Information

Setting JNDI Properties

Configuring RMI or JMS Port for Standalone EJB Clients

Using the Initial Context Factory Classes

Accessing an EJB in a Remote Server

Packaging and Sharing Classes

Entity Bean Concurrency and Database Isolation Modes

Database Isolation Modes

Entity Bean Concurrency Modes

Exclusive Write Access to the Database

Effects of the Combination of Isolation and Concurrency Modes

Affects of Concurrency Modes on Clustering

Configuring Pool Sizes For Entity Beans

Techniques for Updating Persistence

Configuring Environment References

Environment variables

Environment References To Other Enterprise JavaBeans

Environment References To Resource Manager Connection Factory References

Configuring Security

Granting Permissions in Browser

Authenticating and Authorizing EJB Applications

Specifying Credentials in EJB Clients

Setting Performance Options

Performance Command-Line Options

Thread Pool Settings

Statement Caching

Task Manager Granularity

Using DNS for Load Balancing

Common Errors

NamingException Thrown

Deadlock Conditions

ClassCastException

9 EJB Clustering

EJB Clustering Overview

Stateless Session Bean Clustering

Stateful Session Bean Clustering

Entity Bean Clustering

Combination of HTTP and EJB Clustering

Enabling Clustering For EJBs

Configure Nodes With Multicast Address and Identifier

EJB Replication Configuration

Deploy EJB Application To All Nodes

Application Client Retrieval Of Clustered Nodes

Load Balancing Options

10 Active Components for Java

Future Needs of Business Applications

Architectures

Remote Procedure Call Model

Database Transactional Queueing Model

AC4J Solution

AC4J Architecture

Introduction to AC4J Components

Active EJBs

Interaction

Processes

Reactions

Data Tokens

Data Bus

Configuring Oracle Databases to Support AC4J

AC4J Data Bus XML Configuration

AC4J Example

Asynchronous Request to An Active EJB

Active EJB Processes the Client's Request

Asynchronous Response to the Requesting Active EJB

Asynchronous Response to the Client

Response from the Client

AC4J Active EJB Deployment

Administering AC4J

Administering Oracle Databases to Support AC4J

Description of the JEM PL/SQL package

Description of the createDatabusTpc Package Public Method

Description of the dropDatabusTpc Package Public Method

Description of the JEM Schema Objects

A EJB 1.1 CMP Entity Beans

Creating Entity Beans

Home Interface

Remote Interface

Entity Bean Class

Persistent Data

Primary Key

Deploying the Entity Bean

Advanced CMP Entity Beans

EJB 1.1 Advanced Finder Methods

EJB 1.1 Object-Relational Mapping of Persistent Fields

B OC4J-Specific DTD Reference

OC4J-Specific Deployment Descriptor for EJBs

Enterprise Beans Section

Assembly Descriptor Section

Element Description

C Third Party Licenses

Apache HTTP Server

The Apache Software License

Apache JServ

Apache JServ Public License

Index