Day 15. Understanding J2EE Architecture

In Day 1, “Understanding EJB Architecture,” you learned that Enterprise JavaBean (EJB) technology is part of the J2EE architecture, and that it's the standard for developing and deploying enterprise applications and components. Enterprise applications can be assembled from standard components and then deployed on varieties of J2EE-compliant application servers. Today, you'll explore the big picture of the J2EE platform. We'll cover the rationale behind the Java 2 Platform, Enterprise Edition (J2EE), and the set of standard APIs that constitute its framework. You'll study the evolution of the multitier architecture as the basis for the J2EE platform. By the end of the day, you'll have learned how your projects can benefit from the J2EE design patterns. You'll also learn how J2EE applications are deployed in the appropriate container.

Today's road map is to explore the J2EE architecture and platform; to that end, you'll

• Learn what J2EE is, and what its objectives are

• Learn the evolution of the J2EE architecture from two-tier to multitier

• Understand the container model and the types of containers used in the J2EE platform

• Explore the J2EE standard common services

• Learn the different J2EE protocols and interactions between tiers

• Understand how J2EE applications are partitioned into modules and deployed into containers

• Understand J2EE design patterns and best practices