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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The CloudscapeCustomerDAO implements the CustomerDAO as shown in
Example 9.4. The implementation of other DAOs, such as
CloudscapeAccountDAO, CloudscapeOrderDAO, OracleCustomer- DAO,
OracleAccountDAO, and so forth, ...
When the underlying storage is not subject to change from one implementation to
another, this strategy can be implemented using the Factory Method pattern to
produce a number of DAOs needed by the application. The class diagram for this
This class diagram shows a base DAO factory, which is an abstract class that is
inherited and implemented by different concrete DAO factories to support storage
implementation-specific access. The client can obtain a concrete DAO factory ...
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J2EE Platform Overview
Presentation Tier Design Considerations and Bad Practices 34
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