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Programming Spiders, Bots, and Aggregators in Java, by Jeff Heaton
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Spiders, bots, and aggregators are all so-called intelligent agents, which execute tasks on the Web without the intervention of a human being. Spiders go out on the Web and identify multiple sites with information on a chosen topic and retrieve the information. Bots find information within one site by cataloging and retrieving it. Aggregrators gather data from multiple sites and consolidate it on one page, such as credit card, bank account, and investment account data. As the Web grows more complex, there will be more and more applications of intelligent agents; Java is expected to be one of the principal languages used to build these agents.
- Sales Rank: #479054 in Books
- Brand: Brand: Sybex
- Published on: 2002-02
- Original language: English
- Number of items: 1
- Dimensions: 9.00" h x 1.20" w x 7.50" l,
- Binding: Paperback
- 512 pages
- Used Book in Good Condition
From the Back Cover
The content and services available on the web continue to be accessed mostly through direct human control. But this is changing. Increasingly, users rely on automated agents that save them time and effort by programmatically retrieving content, performing complex interactions, and aggregating data from diverse sources. Programming Spiders, Bots, and Aggregators in Java teaches you how to build and deploy a wide variety of these agents–from single-purpose bots to exploratory spiders to aggregators that present a unified view of information from multiple user accounts.
You will quickly build on your basic knowledge of Java to quickly master the techniques that are essential to this specialized world of programming, including parsing HTML, interpreting data, working with cookies, reading and writing XML, and managing high-volume workloads. You’ll also learn about the ethical issues associated with bot use--and the limitations imposed by some websites.
This book offers two levels of instruction, both of which are focused on the library of routines provided on the companion CD. If your main concern is adding ready-made functionality to an application, you’ll achieve your goals quickly thanks to step-by-step instructions and sample programs that illustrate effective implementations. If you’re interested in the technologies underlying these routines, you’ll find in-depth explanations of how they work and the techniques required for customization.
About the Author
Jeff Heaton is an author, college instructor, programmer, and Internet entrepreneur. He has worked with many languages, including C++, Java, and Visual Basic. He coauthored SAMS' Teach Yourself Visual C++ 6.0 Professional Reference Edition and has written for Java Developer's Journal, Windows Developer's Journal, and C++ Users Journal. He teaches Java programming at St. Louis Community College and has served as a consultant programmer for Anheuser-Busch, MasterCard, and Boeing, among others.
Most helpful customer reviews
27 of 28 people found the following review helpful.
not for serious programmers
By A Customer
The code presented in this book is painful to look at. For one thing, the author is not familiar with basic Java coding conventions and continues to use C conventions instead.
In addition to not knowing proper coding conventions, this guy has no clue about writing Java UIs - the code listed in this book actually has Visual Cafe tags all over the place!
As far as info regarding spiders/bots/aggregators - there is decent high level overview info in this book, but nothing for a real programmer. You will not learn how to build these things on your own, and the book relies on the helper libraries included on the cd-rom to accomplish anything. If you are hoping to build anything useful after purchasing this book, understand that you will only succeed if you include the com.heaton.* libraries included on the cd.
12 of 13 people found the following review helpful.
Lots of working code but not much of a tutorial
By calvinnme
Bots are the simplest form of Internet-aware programs in that they simply carry out a repetitive task once unleashed on the web. A spider travels the web in a complex fashion, moving from one part of the World Wide Web to another collecting information from one site and then jumping to another based on that information. An aggregator is a bot that is designed to log into several user accounts and retrieve similar information.
If you need a complete bot, spider, or aggregator written in Java, complete with source code and a detailed manual about that source code so that you can customize it to suit your needs, this is a five star book. However, if you are looking for a book about information storage and retrieval and network programming that focuses on the theory of operation of such software with application code written in Java, you will be sorely disappointed.
The author did such a fine job of documenting his work with excellent diagrams, comments, and the book that reads like a user's manual, that I easily took his Web spider code and modified it to perform many additional tasks that his basic package does not do. All of the hooks are available in his code for you to modify it to collect or examine just about any kind of data accessible via the web.
I highly recommend this book if you are taking an information storage and retrieval class and you would like to read and study something applied on spiders, bots, and aggregators versus the theory you get in most textbooks. Just understand you are getting code plus a user's manual, not a tutorial. You are definitely going to need other resources on Java network programming if you want to study, understand, or modify the included source code. I suggest the latest edition of "Java Network Programming" by Elliotte Rusty Harold for help with the network programming part of bots, spiders, and aggregates. I also suggest you look at "Spidering Hacks", which has many good ideas of features you can add to your web spider.
12 of 13 people found the following review helpful.
Misleading Title
By A Customer
As another reviewer commented this book should be called using the com.heaton.bot package api reference. All you learn is how to use this package of java classes, not how to actually create spiders, bots or aggregators from the ground up. I feel the title is misleading for such an expensive book. The only way I will learn what I want is to read the authors source code - which btw is very ugly however functional.
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