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Greetings...

How much should one framework know about another? You don't want to
introduce inappropriate dependencies, but you also don't want to put up
walls if you can help it. Given a choice, the preference seems to be for
keeping frameworks away from one another. In fact, this attitude is so
prevalent, I was surprised when writing my "QuickTime for Java" book that
I could pull in Swing's undo/redo API and get it to work with the utterly
unrelated and dissimilar QTJ. Thing is, there are clearly some
combinations that are meant to be, like back-end business logic and web
presentation frameworks: one doesn't get you very far without the other.

"While the [...] synergy between EJB 3.0 and JSF is appealing, it is not
yet realized within the Java Enterprise Edition (JEE) 5.0 framework. In
plain Java EE, there is still a significant amount of glue code necessary
to use both JSF and EJB 3.0 when building a web application--even more, if
you add BPM to the recipe for a great application." Want to avoid writing
all that glue yourself? Try a seam instead. In "JBoss Seam," Thomas
Heute looks at how the Seam framework provides inter-framework plumbing
and a stateful component model, to make web app development less of a
hassle.

<http://www.onjava.com/pub/a/onjava/2006/03/15/jboss-seam.html>

Call it Zeroconf, Bonjour, or even Rendezvous (if the lawyers will let
you)... whatever it is, it's probably the best-known way of providing
spontaneous networking, as epitomized by popular applications like Apple's
iTunes. But why should native applications have all the fun? Apple has
provided a Java binding to its Rendezvous implementation on Mac, Windows,
Linux, Solaris, and *BSD. In "Zero Configuration Networking: Using the
Java APIs, Part 1," Stuart Cheshire and Daniel H. Steinberg, authors of
"Zero Configuration Networking: The Definitive Guide" show you how to
register a Zeroconf service in Java.

<http://www.onjava.com/pub/a/onjava/excerpt/bonjour_ch08/index.html>

Why let idle computers waste CPU time not doing anything? In the dev2dev
article "Use JMS Clients to Utilize Free Computer Resources," Nimish Doshi
proposes distributing computing work across the network. "This article
proposes a framework for placing Java Messaging Service (JMS) clients on
these underutilized machines to offload the work normally performed on a
server. The client can listen on a request queue for a unit of work to
perform, and respond on a reply queue."

<http://dev2dev.bea.com/pub/a/2006/02/jms-distributed-work.html>

Building your own Google? It's not as crazy an idea as you might
think--running your own search engine gives you a transparency in
understanding how the search rankings work, something that can be very
important in some kinds of organizations. Plus, it lets you index sites
that aren't visible to the public internet. And rather than writing your
own, you can turn to Apache Nutch to do all the hard parts. Wrapping up
the second part of a java.net series, Tom Nutch shows how to get results
from your Nutch index in "Introduction to Nutch, Part 2: Searching."

<http://today.java.net/pub/a/today/2006/02/16/introduction-to-nutch-2.html>

Recent O'Reilly Network weblogs of interest to Java developers:

Timothy M. O'Brien - Making Sense of the Maven 2 Repository
<http://www.oreillynet.com/onjava/blog/2006/03/making_sense_of_the_maven_2_re.html>

Steve Anglin - TheServerSide Java Symposium Is Near
<http://www.oreillynet.com/onjava/blog/2006/03/theserverside_java_symposium_i.html>

Dejan Bosanac - Proper handling of database-related exceptions
<http://www.oreillynet.com/onjava/blog/2006/03/proper_handling_of_databaserel.html>

Timothy M. O'Brien - Word of the Day: Contradistinction
<http://www.oreillynet.com/onjava/blog/2006/03/word_of_the_day_contradistinct.html>

Timothy M. O'Brien - Don't be misled, Xindice is dead
<http://www.oreillynet.com/onjava/blog/2006/03/dont_be_misled_xindice_is_dead.html>

Check out more O'Reilly Network Java weblogs at:
<http://www.oreillynet.com/pub/q/weblog_s?x-subject=3&>

Please join us again next week.

Chris Adamson, Editor
ONJava.com
cadamson@oreilly.com

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Complimentary copies of Visual Studio Standard (NFR) are limited, so act
today! http://www.oreilly.com/go/learn2asp_jav

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