Designing Enterprise Applications with J2EE

Book Description

This book, now in its second edition, describes standard approaches to designing multitier enterprise applications with the Java 2 Platform, Enterprise Edition. This book, and the accompanying Java Pet Store sample application, are part of the successful Java BluePrints program created by Sun Microsystems with the introduction of the J2EE platform. This program has been used by thousands of application architects, developers, and students to attain better understanding of the programming model inherent in the J2EE platform. This book and the Java BluePrints program don't provide information on how to use individual Java technologies to write applications--that's the role of the companion Java Tutorial program. Instead, Java BluePrints focuses on guidelines for application architecture, such as distributing J2EE application functionality across tiers and choosing among design options within each tier. This book assumes that the reader already has basic knowledge of the J2EE platform. We recommend that readers without this knowledge familiarize themselves with the J2EE Tutorial either before or while reading this volume. See "Related Information" later in the Preface for details. This book describes the architecture and design principles employed in building J2EE applications, and explores of the specific approach adopted by the sample application. Striking a balance between specific details and broad principles is never easy. The hope behind this effort is that the principles presented here are both consistent with and a useful complement to the implementation provided by the sample applications documented in this book. This book is intended primarily for system architects and enterprise application developers engaged in or considering a transition to the J2EE platform. It is also useful for product vendors interested in developing applications consistent with the J2EE standard. Obtaining the Sample Application You can download the Java Pet Store sample application, version 1.3, which is described in this book, from: [a href="http://java.sun.com/blueprints/code/" target="New">http://java.sun.com/blueprints/code/ The sample application requires a J2EE v1.3-compliant platform on which to run. You can download J2EE SDK , which is a freely available implementation of that platform, from: http://java.sun.com/j2ee/download.html Related Information Pointers to J2EE documentation can be found at: http://java.sun.com/j2ee/docs.html For information on how to use the J2EE SDK to construct multitier enterprise applications, refer to The J2EE Tutorial , available at: http://java.sun.com/j2ee/tutorial/ The J2EE technologies cited in this book are described in their specifications:Java 2 Platform, Enterprise Edition Specification, Version 1.3 (J2EE specification). Available at http://java.sun.com/j2ee/download.html Java 2 Platform, Standard Edition Specification, Version 1.3 (J2SE specification). Available at http://java.sun.com/j2se/1.3/docs/ Java Servlet Specification, Version 2.3 (Servlet specification). Available at http://java.sun.com/products/servlet/ JavaServer Pages Specification, Version 1.2 (JSP specification). Available at http://java.sun.com/products/jsp/ Enterprise JavaBeans Specification, Version 2.0 (EJB specification). Available at http://java.sun.com/products/ejb/ Java API for XML Processing Specification, Version 1.1 (JAXP specification). Available at http://java.sun.com/xml/jaxp/ J2EE Connector Architecture Specification, Version 1.0 (Connector specification). Available at http://java.sun.com/j2ee/connector/ JDBC API Specification, Version 2.0 (JDBC specification). Available at http://java.sun.com/products/jdbc/ JDBC Standard Extension API Specification, Version 2.0 (JDBC extension specification). Available at http://java.sun.com/products/jdbc/ Java Transaction API Specification, Version 1.0.1 (JTA specification). Available at http://java.sun.com/products/jta/ Java Naming and Directory Interface Specification, Version 1.2 (JNDI specification). Available at http://java.sun.com/products/jndi/ Java IDL. Available at http://java.sun.com/j2se/1.3/docs/guide/idl/ RMI over IIOP. Available at http://java.sun.com/products/rmi-iiop/ Java Message Service Specification, Version 1.0.2 (JMS specification). Available at http://java.sun.com/products/jms/ Java Authentication and Authorization Service Specification, Version 1.0 (JAAS specification). Available at http://java.sun.com/products/jaas/ JavaMail API Specification, Version 1.2 (JavaMail specification). Available at http://java.sun.com/products/javamail/ JavaBeans Activation Framework Specification, Version 1.0.1 (JAF specification). Available at http://java.sun.com/products/javabeans/glasgow/jaf.html Typographic Conventions Table 0.1 describes the typographic conventions used in this book. Table 0.1 Typographic Conventions Typeface or Symbol AaBbCc123 The names of commands, files, and directories; interface, class, method, and deployment descriptor element names; programming language keywords Edit the file Main.jsp. How to retrieve a UserTransaction object. Specify the resource-ref element. AaBbCc123 Variable name The files are named XYZfile. AaBbCc123 Book titles, new words or terms, or words to be emphasized Read Chapter 6 in User's Guide. These are called class options. You must be root to do this. 0201787903P03252002 /p>

Reviews From AMAZON.COM

Not as useful as expected

This book would have been better if it had been written by people who had the ability to be a bit more objective about these technologies. (The authors work for Sun, of course.) There is a large portion of the book devoted to repeated explanations about why the J2EE platform is the best available. There are a number of plugs for client-side Java programs (applets, etc.), which is a marginal technology in practical terms, despite its theoretical advantages. I just wanted more objective information and less marketing hype. That being said, the book does have some useful information. A better and more dispassionate look at the J2EE platform spec is "Java for the Web with Servlets, JSP, and EJB" published by New Riders.

An overview of technologies and architectural models

The book is a high level overview of the application design with the Java 2 Platform, Enterprise Edition. It may be helpful for someone who wants to know how different architectural choices and technologies fit together in an enterprise application.

It starts with an introduction to different enterprise application scenarios (Stand-Alone, Web-Centric, EJB-Centric, B2B, etc.), and then goes on discussing each of the architectural tiers in detail. In addition, in separate chapters it covers important issues like security, transaction management, internationalization, and localization.

As a rule, each chapter gives an overview of the involved technologies, considers most important issues, and provides some tips on design and proper usage. Available tools are also discussed. Each chapter is followed by a list of references and resources. Many resources have URLs.

The last chapter presents an architecture of the sample application. Unfortunately, quite a bit of space in this chapter is wasted reiterating general pros and cons of distributed and local architectures. My impression is that the author of this particular chapter (each chapter in the book is written by a different author or group of authors) assumes that the reader does not have any prior knowledge about the subject and have not read preceding chapters.

A few code samples in the entire book illustrate some points in the discussion; the code snippets are neither complete nor complex, and obviously are not written for reuse.

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