Book Image

IBM WebSphere eXtreme Scale 6

By : Anthony Chaves
Book Image

IBM WebSphere eXtreme Scale 6

By: Anthony Chaves

Overview of this book

A data grid is a means of combining computing resources. Data grids provide a way to distribute object storage and add capacity on demand in the form of CPU, memory, and network resources from additional servers. All three resource types play an important role in how fast data can be processed, and how much data can be processed at once. WebSphere eXtreme Scale provides a solution to scalability issues through caching and grid technology. Working with a data grid requires new approaches to writing highly scalable software; this book covers both the practical eXtreme Scale libraries and design patterns that will help you build scalable software. Starting with a blank slate, this book assumes you don't have experience with IBM WebSphere eXtreme Scale. It is a tutorial-style guide detailing the installation of WebSphere eXtreme Scale right through to using the developer libraries. It covers installation and configuration, and discusses the reasons why a data grid is a viable middleware layer. It also covers many different ways of interacting with objects in eXtreme Scale. It will also show you how to use eXtreme Scale in new projects, and integrate it with relational databases and existing applications. This book covers the ObjectMap, Entity, and Query APIs for interacting with objects in the grid. It shows client/server configurations and interactions, as well as the powerful DataGrid API. DataGrid allows us to send code into the grid, which can be run where the data lives. Equally important are the design patterns that go alongside using a data grid. This book covers the major concepts you need to know that prevent your client application from becoming a performance bottleneck. By the end of the book, you'll be able to write software using the eXtreme Scale APIs, and take advantage of a linearly scalable middleware layer.
Table of Contents (15 chapters)
IBM WebSphere eXtreme Scale 6
Credits
About the Author
About the Reviewers
Preface

The bookmarks app


I wrote the first version of the bookmarks app sometime in early 2003. How many computers do you use each day? How many web browsers on each computer? If you're like me, you use different computers at work and a few more at home. Between all of those computers, there wasn't a good way to sync web bookmarks (2003 remember). Have you ever found yourself at an unfamiliar computer without the web references you need handy? Email is not a good way to manage bookmarks, and therefore the bookmarks app was born.

But it's from 2003! Well we need an existing project that would benefit from using a data grid. This is an existing project that uses the classic Java stack: database (MySQL), Hibernate, service layer and Spring Web MVC, all deployed to JBoss. This sounds like a typical example of what we face in the wild. It's as good a choice as any to work with, and honestly, the code base is a mess. Let's see what we can do about it.

The data model

The data model is simple. Users have...