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Greetings...
It's all about the network this week... and maybe it has been
for a while. It's hard to find an application these days that
isn't network-enabled. Of course, most of us in the Java world
are writing web applications, network services, distributed
applications, etc. But even on the desktop, it's hard to find
an application that never touches the network card. Look around
and see if your favorite applications don't, at the very least,
automatically check their publisher's site for new versions or
hot-link to a home page. Finding an exclusively local application
this side of "Hello World" gets harder every month.
Nuno Santos was one of the many who greeted the arrival of
high-performance IO in the form of Java 1.4's NIO package, only
to ask, "where's the SSL support?" and find that the two
couldn't be used together. Fortunately, J2SE 5.0 sets that
right. In Using SSL with Non-Blocking IO, Santos investigates
SSL support provided by J2SE 5.0, saying it "solves the problem
once and for all, both for existing and future IO and threading
models, by providing a transport-independent approach for
protecting the communication between two peers. Unfortunately,
this is a complex API with a long and steep learning curve."
Santos' article shows the details of setting up and using an
SSL session to exchange secure data.
http://www.onjava.com/pub/a/onjava/2004/11/03/ssl-nio.html
Sometimes, you'd like to stay off the network if you can, since
local method calls are orders of magnitude faster than remote
ones. The Enterprise JavaBean 2.0 spec gives beans both local
and remote views, meaning that in some cases you can use a local
version of their interfaces. But when? In Local and Remote EJB
Interfaces, Olexiy Prohorenko lays out some strategies: "what
I've tried to do is to describe the basics and the most important
(in my opinion) details."
http://www.onjava.com/pub/a/onjava/2004/11/03/localremote.html
In a feature from webservices.xml.com, Bilal Siddiqui continues
his long-running web services security series in Implementing
XML Signatures in WSS4J. In this fifth installment, he discusses
six WSS signature tokens and offers Java implementations of
five of them.
http://webservices.xml.com/pub/a/ws/2004/10/20/wss5.html
In this week's feature article from java.net, Paul Tyma looks
at The New Obfuscation. Given the strategy of making your code
as hard to understand as possible to a would-be reverse-engineer,
the new approaches move beyond old techniques like method
renaming to mangling code in ways that the JVM understands and
javac doesn't. For example, an unrolled loop can liberally use
JVM gotos, supported by the JVM but not by the language itself:
"the most intriguing part of this transformation is not the
performance improvement you obtain but the fact that this code
isn't possible in a language like Java".
http://today.java.net/pub/a/today/2004/10/22/obfuscation.html
Please join us again next week.
Chris Adamson, editor
ONJava.com
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