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Tomcat 6 Developer's Guide by Damodar Chetty

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Chapter 3. Servlet Container Overview

In the last chapter, we noted that the Java Enterprise Edition can be considered to be nothing more than a set of specifications, or interfaces, for which service providers are required to provide implementations.

While it is the actual implementation that does all the work, these specifications ensure that each implementation can assume that all its other collaborating pieces work as described by their interfaces. In theory, this allows complex software platforms (such as application servers) to be assembled from constituent implementations, each of which is sourced from a different vendor.

In practice, it is highly unlikely that you will interface an EJB container from WebSphere and a JMS implementation from ...

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