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PRO EJB, (Wrox Us) (Englisch) Taschenbuch – 21. Juli 2001

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Amazon.de

Written for the experienced Java developer or manager, Professional EJB provides a truly in-depth guide to using Enterprise JavaBeans, including versions 1.0 and 2.0. Filled with practical advice for good design and performance and plenty of useful sample code, this title is one of the best available guides to working with this powerful component standard.

While some titles on EJB are long on theory and short on the nuts and bolts of actually deploying and running beans on real platforms, this book distinguishes itself with plenty of practical code as well as the XML descriptors needed to deploy each sample. (With EJB the genius is in the details--more so than with most programming topics--and the authors supply the necessary deployment specifics here.) Weighing in at over 1,200 pages, this text is massive but exceptionally well paced. The Wrox team of authors have assembled a simply excellent tutorial for building and using EJB, beginning with the version 1.0 standard. The authors start with session and then entity beans, exploring features built in to today's J2EE-compliant application servers. Coverage of the EJB 2.0 standard, along with new topics like messaging beans and the Java Message Service (JMS) comes later.

Besides actual source code and an excellent case study for an online movie ticket booking application, several chapters explore design issues with EJB in detail. At this point in the book, there is an excellent section on a half-dozen reusable EJB design patterns. There's also plenty of advice for squeezing more performance and scalability out of today's J2EE application servers.

Later chapters turn toward newer technologies like wireless and Web services, and how to integrate EJB with two older distributing computing standards (COM and CORBA). There's coverage on installing and running some of today's most popular J2EE application servers, from BEA WebLogic, to IBM WebSphere Application Server, to the free, open-source JBoss alternative. (In theory, any properly designed EJB will run on any server, but it helps to get some help with each J2EE application server platform.)

Overall, the focus on running EJB in real application servers helps makes this book a success. Professional EJB will be a good refresher for those making the transition to EJB 2.0, as well as those developers who are new to Sun's powerful component standard and want to get it right in a hurry. --Richard Dragan

Synopsis

Enterprise Java Beans (EJB) is a server-side component architecture and a central part of the J2EE platform. EJB enables the rapid development of distributed, secure and portable Java applications. This follow-up title to "Professional Java Server Programming - J2EE Edition" goes from design principles and theory right through to building robust real-world applications and concludes with several case studies including EJB applications and COM integration. Published to coincide with the EJB 2.0 specification this book is an in-depth guide to every aspect of this component architecture.

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Von Ein Kunde am 14. März 2002
Format: Taschenbuch
Ein exzellentes Buch zum Thema EJB: Gut strukturiert, übersichtlich, ausführlich, vollständig und praxisnah mit vielen einleuchtenden Beispielen. Solide Java-Kenntnisse sind für das Studium der Materie allerdings Voraussetzung. Erfahrungen mit der Entwicklung verteilter Software sind hilfreich, aber nicht zwingend erforderlich, da neben dem eigentlichen Thema auch die Erläuterung der dahinter stehenden Konzepte nicht zu kurz kommt (es soll allerdings nicht unerwähnt bleiben, daß meine Einschätzung nach gut einem Jahr CORBA in diesem Punkt etwas verzerrt sein mag). Als Teil der Lektüre erhält der Leser auch noch angemessene Einführungen in andere Java-Technologien wie JNDI, JMS oder JDBC. Insgesamt ein rundes und auch angenehm zu lesendes Informatik-Fachbuch.
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Amazon.com: HASH(0x9a5d3d74) von 5 Sternen 17 Rezensionen
32 von 32 Kunden fanden die folgende Rezension hilfreich
HASH(0x9a5da984) von 5 Sternen Excellent treatment of the EJB 2.0 (PFD 2) spec, and more... 4. August 2001
Von Eric L. Ma - Veröffentlicht auf Amazon.com
Format: Taschenbuch
DISCLAIMER: I am also a tech reviewer, but trust me my intention is to provide an un-biased review here.
Let me start by sharing a secret: since January I have been eagerly awaiting the arrival of the 2nd Ed. of Ed Roman's hugely popular EJB book. Well, guess what: while Ed's book is going through community review at theServerside.com (I applaud Ed for being the first to do this, although it may or may not have slowed down the publication process), Wrox managed to go a leg up and became the first publisher of an EJB 2.0 book. Judging from the content of the current book, I have good reasons to say that it has raised the bar for the next generation of EJB titles coming out in the 2nd half of this year. Why? For one thing this book is based on the new EJB 2.0 spec and is up-to-date with PFD 2. As if this not enough a selling point by itself, Wrox also threw in a bunch of other high-octane topics, which made the total value proposition very compelling.
Let's now go through the content of the book, should we?
Chapters 1 to 4 mostly target EJB newcomers. Here you find short and sweet code samples for each flavor of EJB 1.1 session and entity beans. The author's emphasis is clearly on the client views and life cycles of these beans. Many state and sequence diagrams are used to help readers to come to a good grip of this critical material. I consider the goal superbly achieved, even though the code could have used some System.out.println calls to demo actually how bean classes are invoked by an EJB container. Well, save that as your homework.
Chapters 5 and 6 cover the new EJB 2.0 entity bean features we all have been waiting for, i.e., local interfaces, container-managed relationships, home methods, and EJB QL, among others. Dan O'Connor was at his best again explaining how the new spec solves some of EJB 1.1's toughest problems, like the need to use coarse-grained beans to cut down the number of remote calls. Experienced EJB developers, start here.
Chapter 7 introduces MDB. Frankly, I would like to see it augmented to include more details on transactional MDB. Well, Tyler Jewell should fill that void in Ed's book.
Chapter 8 deals with EJB environment, an often-confusing topic to many. How do I specify a DataSource in my ejb-jar.xml file? What does "java:comp/env/..." mean and where does it come from? You get the answers here.
Chapters 9 and 10 are about EJB transactions and Security. And let me tell you - read these vital topics here and forget about any other book. The discussion is so much better in breadth and depth than anywhere else. You need an example on a distributed TX? No problem. Want to understand security principals? They have it covered.
Chapter 11 starts a section on EJB design issues by providing some well-thought-out advice. The topics are so timely and relevant, like bean granularity, session vs. entity beans, BMP vs. CMP, which people ask on a daily basis at various EJB forums. EJB architect wanna-be's: read this chapter and start to enjoy what used to be sleepless nights.
Chapter 12 is about EJB Design Patterns. Well, I guess you cannot cover in one chapter what 3 Sun J2EE patterns gurus wrote in an entire book. Go buy "Core J2EE Patterns" instead.
Chapter 13 tries to show how to use UML to design EJB's. Frankly, this topic is yet to be mature and I doubt many people really practice such. It is still food for thought though.
Chapter 14: if you read no other chapter in the book, please do read this one. EJB developers live and die on the performance of the beans they write. Bean-test is probably the best-known EJB testing tool today and this chapter shows you how to use it.
Chapter 15 gives you more stuff like patterns, idioms that you can use to achieve optimal EJB performance and scalability. It also explains how EJB containers optimize callbacks. To be honest, things start to get a little bit repetitive but I had no major complaint.
Chapter 16: if you believe in BMP or writing SQL is in your blood, this is the one for you. You see how the dirty flag is used, and how coarse-grained bean modeling parent-child relational tables are written. This is a very useful chapter about handling traditional RDBMS-based relationships in the EJB 1.1 world.
Chapter 17: if you are a black-belt EJB developer and want to try you hand to become an EJB container writer, read this. If you brain is swollen by now, save this chapter for later.
Chapter 18 tries to put together a real-world J2EE sample application with servlets, JSP's and EJB's. Well, I only know one attempt that may have ended with some sort of a deliverable(the end-result is known as the Java Pet Store). FYI that pet project of someone has gone through 3 revisions and people are still tinkering with it.
Chapters 19 to 21 are about interoperating with EJB from COM, CORBA, and WAP clients. They are good enough to get you started by following the examples step-by-step.
Chapter 22 is about J2EE as Web Services. IBM's solution is the main one showcased here. Stay tuned.
The book ends with Appendices A to G, which all evolve around the deployment of a simple EJB app on various commonly found app servers. Take a look if you are starting out with EJB; otherwise join the Java Pet Store deployathon for more fun.
Now you ask me: what's missing from the book? Well, topics like EJB build and packaging strategy will definitely of interest to many. Discussion on clustering is also sorely missed.
Overall, I am excited about the book. I can imagine Ed Roman et al. and Richard Monson-Haefel working hard to top this one. To me, competition is a healthy thing.
8 von 8 Kunden fanden die folgende Rezension hilfreich
HASH(0x9a5daad4) von 5 Sternen Great book even for the experienced! 17. August 2001
Von Nancy Azi - Veröffentlicht auf Amazon.com
Format: Taschenbuch
This book does cover EJB2.0 extensively (the review below must be for a different book!). It not only covers the differences between 1.1 and 2.0 but it gives great illustrative examples.
Although I have been working with EJB for sometime, the book covers the topics that I don't have time to play around with - it provides very good coverage of topics such as Local interfaces and their uses, EjbQL, and home methods (finally!)
The only chapters 19-21 are the only ones that do not go into real depth - but they shouldn't since they relate to topics not necessarily meant for this book; however, they give a great examples to start from such as the wireless one.
I definitely recommend this book - I already have to the rest of my team!
10 von 11 Kunden fanden die folgende Rezension hilfreich
HASH(0x9a5dae10) von 5 Sternen Very pleased with this purchase 22. August 2001
Von Joseph Asfadi - Veröffentlicht auf Amazon.com
Format: Taschenbuch
I agree that this book is very good at covering the topics that it sets out in the outline.
This covers the EJBs in great detail - both 1.1 and 2.0. The knowledge of the individual authors definitely does come through - I have not purchased a Wrox title before, but I rather like the idea of multiple authors working on a book - I find the different views and experiences very powerful.
I did find that at times it did gloss over topics - I would have liked more information on the different pieces of the J2EE architecture, but that may have lost the focus of the book I suppose.
All in all, this book has been able to help us considerably in our development - it gives more than just 'theoretical' scenarios and has significantly reduced the learning curve amongst our team.
I never give perfect marks - but this book is definitely one of the better books that I have purchased.
3 von 3 Kunden fanden die folgende Rezension hilfreich
HASH(0x9a5da978) von 5 Sternen Great coverage of EJB's and 2.0 28. Februar 2002
Von Ein Kunde - Veröffentlicht auf Amazon.com
Format: Taschenbuch
I picked this up last summer as it was the only book at the time offering coverage of EJB 2.0.
In the tradition of Wrox books, it offers good coverage of the entire EJB API. While some topics weren't covered exhaustively, that is not what these books are for. This book does provide *effective* coverage of almost everything in EJB 2.0. There is also coverage of design, which is a nice addition!
It is GREAT for it's intended purpose. Highly recommended...
3 von 4 Kunden fanden die folgende Rezension hilfreich
HASH(0x9a5daf60) von 5 Sternen Possibly the best so far !!! 8. August 2001
Von Romin K. Irani - Veröffentlicht auf Amazon.com
Format: Taschenbuch
This is really one of the most practical books out there in the market. After giving an initial introduction/code examples to basic EJB development, the book slowly progresses to the real stuff like EJB2.0, Design Strategies, UML Modelling, Web Services, Wireless, etc. Each of the topics are thought out and covered well.
One particular area that this book would beat out everyone else is in the examples. Almost all the chapters contain very practical code examples.
This is not one of those EJB books that explains the theory with some simple examples.. it goes much more beyond that.
Programmers are going to love this one.
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