Description:
Most Java developers rely on application servers and other tools to simplify working with Enterprise JavaBeans (EJBs) and servlets. But how do you build a Java 2 Enterprise Edition (J2EE) EJB server from scratch? Based on the latest standards from Sun, Java 2 Platform, Enterprise Edition: Platform and Component Specifications provides a valuable roadmap for understanding the design philosophy and required features that go into J2EE. This book will also be of interest to the Java expert who wants to see how today's application servers work under the hood. This title concentrates on the "Enterprise Edition" of Java 2, meaning that "core" features are left out. Instead, the team authors focus on two major areas of Java on the enterprise: servlets (including JavaServer Pages, or JSPs) and Enterprise JavaBeans (EJBs). This text is really two books in one, as both topics get full treatment, from basic features to design goals, required APIs, and the evolution of relevant J2EE standards. XML is used extensively in J2EE for deployment and configuration, and this book provides XML DTDs (for understanding the tags used to defined particular options) and sample XML files for various aspects of deployment. A highlight here is a DTD for defining JSPs using XML--clearly a promising idea that will add great flexibility to JSP-based Web applications. Excellent diagrams explain the architecture behind servlets and EJBs. One standout section provides "object interaction" diagrams for EJBs--diagrams that show the life cycle and operation of these components. This material will be useful to anyone who really wants to understand how EJBs work, and it will help readers solve problems running JavaBeans in the real world. Like being an expert on CORBA or COM+, knowing the inner workings of servlets and EJBs will pay off--even if you don't need to write your own application server. Aimed at the more advanced Java developer, Java 2 Platform, Enterprise Edition delivers an authoritative and detailed guide to what it takes to build an EJB or servlet platform. Read it if you are planning to design such software, or if you want to understand the inner workings of today's powerful J2EE platform. --Richard Dragan Topics covered: - Overview of the Java 2 Enterprise Edition (J2EE) platform
- Required APIs and specifications
- Security issues
- The Java Naming and Directory Interface (JNDI)
- Servlet basics
- J2EE features and APIs
- JavaServer Pages (JSPs): elements, directives and syntax
- Using XML to define JSPs
- Overview of Enterprise Java Beans (EJBs)
- Specifications for EJB application server vendors
- Session and entity beans, bean-managed and container-managed persistence, bean passivation and activation, and EJB deployment with XML
- Transactions, security, and object-interaction diagrams
- Responsibilities for component builders, application-server vendors, deployers, and administrators
- Revision history and future directions for the J2EE standard
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