Core J2EE Patterns: Best Practices and Design Strategies
Over the last few years, Java 2 Platform, Enterprise Edition (J2EE) technology has emerged and matured as a standard platform for building enterprise applications. While the platform has matured into a solid offering for developing and deploying enterprise applications, it does offer its challenges. As developers, often we confuse learning the technology with learning to design with the technology. In this book, senior architects from the Sun Java Center, Sun's Java consulting organization share with the reader their cumulative design experience with and expertise on J2EE technology.
The primary focus of the book is on patterns, best practices, design strategies, and proven solutions using the key J2EE technologies including JavaServer Pages (JSP), Servlets, Enterprise Java Beans (EJB), and Java Message Service (J.M.S) API. Other ancillary technologies like JDBC and JNDI are also discussed as relevant to their usage in these patterns. The J2EE Patterns catalog with 16 patterns and numerous strategies is presented to document and promote best practices for these technologies.
In addition to the patterns and strategies, the book offers the following:
Core J2EE Patterns delivers:
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Token This strategy addresses the problem of duplicate form submissions. A
synchronizer token is set in a user's session and included with each form
returned to the client. When that form is submitted, the synchronizer token in the
form is ...
The component managing this activity (typically a controller, but possibly a JSP)
delegates to these helpers, managing the temporary storage of a fresh token for
each client submission. =* A copy of the token is stored per user on the server ...
Actions are Command objects that extend the controller functionality. This is an
application of the Front Controller pattern, Command and Controller strategy. As
shown in Example 5.3, the save Token () method, which is part of the Action class
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J2EE Platform Overview
Presentation Tier Design Considerations and Bad Practices 34
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