Contents

Title and Copyright Information

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Preface

Intended Audience

Documentation Accessibility

Organization

Related Documents

Conventions

1 Overview

Overview of J2EE

What is the J2EE Application Model?

What is the J2EE Platform?

What is an Application Server?

Overview of Oracle Application Server

J2EE Application Migration Challenges

J2EE Application Architecture

Migration Issues

Migration Approach

Migration Effort

Using This Guide

2 Comparison of Oracle Application Server and WebLogic Server

Application Server Product Offerings

WebLogic

WebLogic Server

WebLogic Enterprise

WebLogic Express

Oracle Application Server

Architecture Comparison

WebLogic Server

Oracle Application Server Components and Concepts

Oracle Application Server Instance

Oracle HTTP Server

OC4J Instances

Oracle Process Management Notification (OPMN) Server

Distributed Configuration Management (DCM)

Oracle Application Server Web Cache

Oracle Enterprise Manager Application Server Control

Oracle Application Server Infrastructure

Oracle Application Server Metadata Repository

Oracle Identity Management

High Availability and Load balancing

WebLogic Server Support for High Availability and Load Balancing

HTTP Session State Load Balancing and Failover (Servlet Clustering)

EJB and RMI Object Load Balancing and Failover

Oracle Application Server Support for High Availability and Load Balancing

Oracle Application Server Instance

Oracle Application Server Clusters (Middle Tier)

OC4J Islands

Stateful Session EJB High Availability Using EJB Clustering

JNDI Namespace Replication

Java Object Cache

Oracle Application Server Web Cache Clusters

OracleAS Infrastructure High Availability Solutions

Oracle Application Server Cold Failover Clusters

Oracle Application Server Active Clusters

J2EE Support Comparison

Java Development and Deployment Tools

WebLogic Development and Deployment Tools

WebLogic Server Workshop

WebLogic Server Administration Console

Oracle Application Server Development and Deployment Tools

Development Tools

Assembly Tools

Administration Tools

3 Migrating Java Servlets

Introduction

Differences Between WebLogic Server and Oracle Application Server 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

Oracle Application Server

WebLogic Server

Migrating Cluster Aware Applications

4 Migrating JSP Pages

Introduction

Differences Between WebLogic Server and Oracle Application Server JSP Implementations

OC4J JSP Features

Edge Side Includes for Java (JESI) Tags

Web Object Cache Tags

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

Comparison of WebLogic Server and Oracle Application Server EJB Features

The following sections go into detail on some of the abovementioned features:

More Efficient Container Managed Persistence

Clustering Support

Scalability and Performance Enhancements

Security and LDAP Integration

WebLogic Server Caveats

EJB Migration Considerations

Migration Steps

Setting Deployment Properties

Vendor-specific Deployment Descriptors

WebLogic Server

OC4J

Generating and Deploying EJB Container Classes

WebLogic Server

OC4J

Loading EJB Classes in the Server

WebLogic Server

OC4J

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) and EJB Query Language (EJB QL)

Message Driven Beans

Configuring Security

Migrating Cluster-Aware EJB Applications to OC4J

EJB Clustering in WebLogic Server

In-Memory Replication for Stateful Session EJBs

Requirements and Configuration

EJB Clustering in Oracle Application Server

Load Balancing

Static Discovery

Dynamic Discovery

Failover

Stateless Session EJBs

Stateful Session EJBs

Entity EJBs

JNDI Namespace Replication

6 Migrating JDBC

Introduction

Differences between WebLogic and Oracle Application Server 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 Additional Feature Comparisons

Java Messaging Service (JMS)

OracleJMS (OJMS)

Java Object Cache

Dynamic Monitoring System (DMS)

Active Components for J2EE (AC4J)

Oracle Application Server TopLink (OracleAS TopLink)

Index