Synopsis
Enterprise JavaBeans (EJB) is a server-side component model for transaction aware, distributed enterprise applications written in the Java programming language. Enterprise JavaBeans 2.1 details the architecture of the Enterprise JavaBeans component model. After an introduction to the component paradigm, the EJB architecture basics are introduced. Based on that, the different component types (Session-, Entity- and Message-Driven-Beans) are discussed in detail. An in-depth introduction to the Java Message Service (JMS) is provided to understand the ideas behind asynchronous and parallel processing provided through Message-Driven-Beans. Transactions, security, and the newly introduced timer service round up the book. Enterprise JavaBeans 2.1 also discusses topics beyond the specification, e.g. inheritance, coupling of EJB components, quality assurance, and more. After reading this book, readers will know the benefits and the limits of EJB. The authors also impart the knowledge required for turning business requirements into EJB-based applications.

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Most Helpful Customer Reviews   Nice Introduction to EJBs, 7 May 2003 By  Thomas Paul (Plainview, NY USA) - See all my reviews       This book is aimed towards the experienced Java developer who is familiar with distributed environments, Servlets, JSPs, and JDBC and wants to get a good in-depth introduction into Enterprise JavaBeans. The book starts with an introduction to EJB technology and the EJB architecture in general. This book is translated into English and these beginning chapters seem to suffer a little bit in the translation as some of the sentences are poorly constructed. The later chapters don’t have this problem however. After the introduction, the book covers each of the different types of beans (session, entity, and message) in detail with a discussion of when and how to use them. Examples of their use from both the server and client side are provided. The deployment descriptors for each type are also covered. Transactions and security are discussed with examples that help to clearly explain how these mechanisms work in EJBs. The authors then discuss some of the practical issues that arise when developing an EJB application such as performance and bean interaction. In the final chapter, the authors explain where EJB fits in with Web Services and then give a brief discussion of the standard timer service added to EJB 2.1. The authors do a good job of not just showing how to use EJBs but also explaining what it is and why you would want to use it. The level of detail makes this a good book for both developers and architects.  Comment | Permalink | Was this review helpful to you? (Report this) › See all customer reviews...		Search Customer Reviews Only search this product's reviews

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