Contents

Title and Copyright Information

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Preface

Audience

Organization

Related Documentation

Conventions

Documentation Accessibility

1 Overview

Overview of J2EE

What is the J2EE Application Model?

What is the J2EE Platform?

What is an Application Server?

Overview of Oracle9iAS

J2EE Application Migration Challenges

J2EE Application Architecture

Migration Issues

Migration Approach

Migration Effort

Using This Guide

2 Comparison of Oracle9iAS and WebLogic Server 6.0

Application Server Product Offerings

WebLogic Server 6.0

WebLogic Server

WebLogic Enterprise

WebLogic Express

Oracle9i Application Server

Architecture Comparison

WebLogic Server 6.0 Components and Concepts

Oracle9iAS Components and Concepts

Oracle9iAS Instance

Oracle HTTP Server

OC4J Instances

Oracle Process Management Notification (OPMN) Service

Distributed Configuration Manager (DCM)

Oracle9iAS Infrastructure Repository

Oracle9iAS Web Cache

Clustering and Load balancing

What is Clustering?

Benefits of Clustering: Failover Recovery

What is LoadBalancing?

WebLogic Server 6.0 Suppport for Clustering and Load Balancing

HTTP Session State Load Balancing and Failover (Servlet Clustering)

EJB and RMI Object Load Balancing and Failover

Oracle9iAS Support for Clustering and Load Balancing

Oracle9iAS Clusters

OC4J Islands

J2EE Support Comparison

Java Development and Deployment Tools

WebLogic Server Development and Deployment Tools

WebLogic Server Development Tools

WebLogic Server Administration Console

Oracle9iAS Development and Deployment Tools

Development Tools

Assembly Tools

Administration Tools

3 Migrating Java Servlets

Introduction

Differences Between WebLogic Server and Oracle9iAS Servlet Implementations

OC4J Key Servlet Container Features

Migrating a Simple Servlet

Migrating a WAR File

Migrating an Exploded Web Application

Migrating Configuration and Deployment Descriptors

Oracle9iAS

WebLogic Server 6.0

Migrating Cluster Aware Applications

4 Migrating JSP Pages

Introduction

Differences Between WebLogic Server and Oracle9iAS JSP Implementations

OC4J JSP Features

Oracle JDeveloper and OC4J JSP Container

Migrating a Simple JSP Page

Migrating a Custom JSP Tag Library

Migrating from WebLogic Custom Tags

WebLogic Server cache Tag

WebLogic Server process Tag

WebLogic Server repeat Tag

Precompiling JSP Pages

Using the WebLogic Server JSP Compiler

Using the OC4J JSP Pre-translator

Standard JSP Pre-translation Without Execution (based on the JSP 1.1 specification)

Configure the JSP Container for Execution with Binary Files Only

5 Migrating Enterprise JavaBean Components

Introduction

Differences Between WebLogic Server and Oracle9iAS EJB Implementations

EJB Container Facilities

More Efficient Container Managed Persistence

Clustering Support

Security and LDAP Integration

EJB Migration Considerations

Migration Steps

Setting Deployment Properties

Vendor-specific Deployment Descriptors

Generating and Deploying EJB Container Classes

Loading EJB Classes in the Server

Migrating EJBs in a EAR or JAR File

Migrating an Exploded EJB Application

Configuring EJBs using Deployment Descriptors

Writing Finders for RDBMS Persistence

WebLogic Query Language (WLQL)

Message Driven Beans

Configuring Security

Migrating Cluster-Aware Applications to OC4J

EJB Clustering in WebLogic Server

In-Memory Replication for Stateful Session EJBs

Requirements and Configuration

EJB Clustering in Oracle9iAS

Load Balancing

Failover

6 Migrating JDBC

Introduction

Differences between WebLogic and Oracle9iAS Database Access Implementations

Overview of JDBC Drivers

Migrating Data Sources

Data Source Import Statements

Configuring Data Sources in the Application Server

Obtaining a Client Connection Using a Data Source Object

Migrating Connection Pools

Overview of Connection Pools

How Connection Pools Enhance Performance

Overview of Clustered JDBC

Performance Tuning JDBC

A Oracle9iAS 1.0.2.x and WebLogic Server 6.0 Comparison

Introduction

Performance Results and Analysis

Performance and Scalability Results

Feature Comparison

Installation and Configuration

Performance and Scalability

J2EE Container Features

Clustering Support

Sample Migration Case Study

B Partner Migration Tools

Cacheon

Features of Cacheon Migrator

TogetherSoft

Index