Book Image

WebSphere Application Server 7.0 Administration Guide

By : Steve Robinson
Book Image

WebSphere Application Server 7.0 Administration Guide

By: Steve Robinson

Overview of this book

As an administrator you need a secure, scalable, resilient application infrastructure to support the developers building and managing J2EE applications and Service Oriented Architecture services. WebSphere application server, a product from IBM, is optimized to ease administration and improve runtime performance. It helps you run applications and services in a reliable, secure, and high-performance environment to ensure business opportunities are not lost due to application downtime. It's easy to get started and tame this powerful application server when you've got this book to hand. This administration guide will help you provide an innovative, performance-based foundation to build, run, and manage J2EE applications and SOA services, offering the highest level of reliability, security, and scalability. This book will take you through the different methods for installing WebSphere application server and demonstrate how to configure and prepare WebSphere resources for your application deployments. During configuration you will be shown how to administer your WebSphere server standalone or using the new administrative agent, which provides the ability to administer multiple installations of WebSphere application server using one single administration console. WebSphere security is covered in detail showing the various methods of implanting federated user and group repositories. The facets of data-aware and message-aware applications are explained and demonstrated giving the reader real-world examples of manual and automated deployments. Key administration features and tools are introduced, which will help a WebSphere administrator manage and tune their WebSphere implementation and application for success.
Table of Contents (16 chapters)
WebSphere Application Server 7.0 Administration Guide
About the Author
About the Reviewers

Class loaders

Class loaders are an integral part of the JVM code and are responsible for finding and loading class files both for the application server itself and applications. It is important that an administrator understands class loaders and how they affect the JVM and deployed applications. Application developers and deployers must understand and consider the location of Java classes and Java resource files, and the class loaders used to access those files, must also be able to make available the appropriate class files to deployed applications. The configuration of class loaders also affects the packaging of applications and their runtime behavior. In this book, we cannot completely cover all the issue and intricacies of class loaders; however, we will attempt to explain class loading and what configuration elements an administrator can use in the administrative console to change class loading behavior.

Class loading basics

A simple and easy way to understand class loaders is to use...