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Sams Teach Yourself J2EE™ in 21 Days by Peter Roxburgh, Andy Longshaw, Debbie Law, Dan Haywood, Martin Bond

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Day 1. The Challenge of N-Tier Development

The current trend in enterprise program development is to provide n-tier frameworks aimed at delivering applications that are secure, scalable, and available. To this end, Sun Microsystems introduced Java 2 Enterprise Edition (J2EE), and Microsoft Corporation ventured the .NET framework to help developers build applications that are Web-friendly and frequently used to deliver e-commerce solutions. There are a myriad of application servers available to house enterprise applications, and many service providers are writing modular tools to plug in and extend the rich functionality. The clients that are taking advantage of this distributed architecture can be as simple as a Web browser (a so-called thin ...

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