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Title: JXTA by Brendon J. Wilson, Brendon J. Wilson ISBN: 0-7357-1234-4 Publisher: New Riders Publishing Pub. Date: 15 June, 2002 Format: Paperback Volumes: 1 List Price(USD): $45.00 |
Average Customer Rating: 5 (6 reviews)
Rating: 5
Summary: An excellent book on p2p and jxta
Comment: This is an excellent book that demystifies the basic concepts of peer to peer computing. It then goes on to explain JXTA in extensive detail with tons of code to experiment with. I always like books that have a complete application to build on the concepts that you have learned throughout and the example provided in this book is great. All in all a great book which i highly recommend and which i will be using for an online course that i will be teaching on Peer to Peer computing technology.
Rating: 5
Summary: a very good JXTA book
Comment: The core of the JXTA is six protocols and this book covers all of them deeply and systematically.
For example, the book first introduces the Peer Discovery Protocol (which will definitely be used by every JXTA application to discover the resources). The book explains how to realize the Discovery Protocol by using the lower layer Resolver Protocol. Then the book teaches us how to use the Discovery Protocol in a JXTA application and actually gives us a useful example.
Every protocol covered in this book follows this pattern - explanation and example.
In addition to the protocols, programmers also need to know how to use some sub-system of JXTA to increase the flexibility of JXTA application and decrease the implement burden. Fortunately, the book covers them, such as CM (cache manager) in chapter4, Document (advertisement) in chapter4, module framework in chapter10, and so forth.
You definitely need to put this book on your bookshelf because give you more than just example code. It includes how the protocols are implemented and how to use the protocols.
Rating: 5
Summary: Good Introduction to JXTA
Comment: JXTA is a new platform from Sun for peer-to-peer computing. JXTA is a short form of juxtapose, meaning side-by-side. Thus JXTA is not meant to replace client-server but to co-exist with it.
At its core JXTA is just a specification for protocols needed for P2P computing. These protocols can be implemented in any language(Java,C,C++ etc)and on any platform. At present the specs define six protocols.
The book under review has done a good job of defining JXTA and its 6 protocols. It consists of 3 parts. The first part gives a general intoduction to JXTA concepts (like peer, peer group, pipe, endpoint, and advertisements) and JXTA protocols.The second part is for those who want to go further and study all the 6 protocols (Discovery, Resolver, Rendezvous, Information, Binding, and Endpoint) in all their gory details. The third part is for those who want to go still further and develop their own applications. Here they will find a 100-page chapter covering a sample application. Thus the reader can decide at what stage he wants to quit.
I found two main defects in the book: First the text in the UML diagrams is so small that I had to buy a magnifying-glass.Secondly the book does not compare JXTA and Jini very well. I think the comparison of Jini with later technologies like Web Services and JXTA is very important for a logical analysis of the direction IT is taking. From a logical point of view, Jini is the inspiration behind both JXTA and Web Services. And it is from this (purely logical) point of view that we will compare Jini with JXTA.
Jini starts with a very powerful unifying principle,namely,the distinction between hardware and software is artificial, and therefore both these concepts must be replaced by a more general concept of services.This is the third unifying principle in IT in over a decade.
First came objects which unified attributes and methods and put them in one basket. Then came components which unified software development. And now we have services which unify hardware and software.Staying on this logical track, what could be the next unifying principle of IT.My "guess" is as follows:
If the difference between physics (hardware) and what it does(software) is artificial, then the seperation of biology (user)from these two is also artificial.Thus hardware,software,and geneware must be unified into a more general concept which covers all three. The concept of services is not enough for this unification even though terms like "user experience" have started floating around in the IT industry.
Well, returning to JXTA, we can look at it as a special case of Jini restricted to P2P and not covering client-server.Alternately, JXTA is Jini minus its dependence on Java and RMI plus new terminology and protocols suitable for only P2P.I hope this is not the end but just the beginning of purely logical comparisons of Jini, JXTA, and Web Services.
Experts are welcome to tear down this argument to pieces. That can only lead to greater logical clarification of the subtleties involved.
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Title: JXTA: Java P2P Programming by Daniel Brookshier, Darren Govoni, Navaneeth Krishnan, Juan Carlos Soto ISBN: 0672323664 Publisher: SAMS Pub. Date: 22 March, 2002 List Price(USD): $39.99 |
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Title: Mastering JXTA: Building Java Peer-to-Peer Applications by Joseph D. Gradecki, Joe Gradecki ISBN: 0471250848 Publisher: Wiley Pub. Date: 15 August, 2002 List Price(USD): $45.00 |
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Title: Java P2P Unleashed: With JXTA, Web Services, XML, Jini, JavaSpaces, and J2EE by Robert Flenner, Michael Abbott, Toufic Boubez, Frank Cohen, Navaneeth Krishnan, Alan Moffet, Rajam Ramamurti, Bilal Siddiqui, Frank Sommers ISBN: 0672323990 Publisher: SAMS Pub. Date: 12 September, 2002 List Price(USD): $49.99 |
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Title: JXTA in a Nutshell by Scott Oaks, Bernard Traversat, Li Gong ISBN: 059600236X Publisher: O'Reilly & Associates Pub. Date: September, 2002 List Price(USD): $34.95 |
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Title: Peer-to-Peer : Harnessing the Power of Disruptive Technologies by Andy Oram ISBN: 059600110X Publisher: O'Reilly & Associates Pub. Date: 15 March, 2001 List Price(USD): $29.95 |
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