codaland
Friday, August 15, 2003
       
Permission based security and J2EE
I’ve been struggling to find a nice way to integrate fine grained role-permission mappings into my application, but still stick to J2EE standards. After two weeks of various refactorings, I’m still not happy with my current framework (although it does work).
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Thursday, August 14, 2003
       
Understanding XML Digital Signature
This article looks at the XML Digital Signature specification, explaining its processing model and some of its capabilities. It provides a more detailed, lower-level understanding of how the WS-Security specification implements its message security feature. (12 printed pages)
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W3C XML Schema: DOs and DON'Ts
The fact is, you don't lose anything by following these DON'Ts, as the rest of this paper demonstrates.

Too long to remember? Then here is the one line version.
Consider W3C XML Schema as DTD + datatype + namespace
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Tuesday, August 12, 2003
       
XML-Security
The XML Security project is aimed at providing implementation of security standards for XML. Currently the focus is on the W3C standards :

* XML-Signature Syntax and Processing; and
* XML Encryption Syntax and Processing.

Once these are implemented, XML Key Management is likely to be the next focus for the project.
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Monday, August 11, 2003
       
Extensible Syndication Engine
So, the other bigger chunk of code that I have sitting around here from the blogging infrastructure that I wrote but didn't get done in the first quarter of this year (and from which the rendering engine made it into dasBlog) is a pretty serious, extensible syndication engine based on Enterprise Services and SQL Server. Pulling in RSS feeds is, in my view, a background server task. A common infrastructure for subscribing, queuing, requesting, transforming, filtering, caching and pushing out results (via LCE) is something that could be very handy, makes a great demo and there's lots of sample data to gather in a short time ;)
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Sunday, August 10, 2003
       
DISPLAYING MULTI-COLUMN LISTS
A common request in newsgroups and forums lately seems to be the ability to have a JList show its options in multiple columns. In this scenario, the columns are displayed in the JList, and then a user selects a row in the display. There are at least three ways to satisfy this request. This tip examines each of these three approaches.
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