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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Extract the data access code into a new class and move the new class logically
and/or physically closer to the Data Source. Data Access Object Data Access
Code Database Database Figure 5.21 Separate Data Access Code Motivation ...
It creates or looks up the appropriate command object, which is implemented as
a JavaBean helper. ... In this case, the Account object uses a Data Access object
(see “Data Access Object” on page 390), hiding the underlying implementation ...
... Commitment Composite Entity CommitmentVO Value Object • Integration Class
Pattern Project|DAO Data Access Object CommitmentsDAO Data Access Object
Value Data Access Object Object <-vO-> Commitmentwo - z save create,' read", ...