Blog
Articles, tutorials, and field notes on identity, integration, API management, and application security — spanning nearly two decades of hands-on work.
Role Mapping & J2EE Security
The discussion of J2EE Security on the JBoss Application Server continues as Role Mapping is introduced.
Using OpenLdap as a User Repository with JBoss 4.3.x
This article continues our discussion of setting up J2EE Security in a JBoss 4.3.x container. In the last article, we completed the setup of an OpenLdap database that can be used as a User Repository.
Adding Groups To OpenLdap
This article describes how to setup an OpenLdap server and add inetperson user objects. However, the article didn’t describe how to add groups to OpenLdap and add users to the groups.
URL & HTML Character Representation
I’ve had to look up the HTML codes for special characters like space many times. In fact, while writing blog entries for Thinkmiddleware.com, I’ve had to stop and look up the HTML code for less-than sign and greater-than sign one to many times. I just haven’t bothered memorizing them.
JBoss 4.3.X Setup
This article explains how to install and start the JBoss “default” server.
Capturing Network Communication Between Two Processes On the Same Machine…
Have you ever run snoop on Solaris or tcpdump on Linux or AIX and discovered that these tools cannot capture IP-based communication that occurs between two processes on the same machine? Or, Wireshark (formerly, Ethereal) on Windows? Only to discover the same limitation?
Capturing JVM TCP Traffic
Any time you have a distributed application, there is network communication involved. Capturing this network traffic can be instrumental in diagnosing and solving problems. Generally, to capturing network traffic, superuser privledges, timing, and a bit of luck is needed. Often, the appropriate…
Websphere v6.x Classloaders
Building on the ideas introduced in the last article, a J2EE Application servers classloaders are explored in this installment. In particular, Websphere Application Server v.6.x Classloaders are introduced. The J2EE Spec provides some guidance regarding J2EE Application Servers, but as with so many…
JEE 6 Draft Proposal Is Available For Public Review
Check out JSR 316 and this article. There is also a Slashdot.org thread on the subject.
Java Virtual Machine Classloaders
Classloaders are responsible for finding and loading classes that are requested in Java code executed inside a Java Virtual Machine. Classloader-related issues are among the most difficult to troubleshoot in the Java/J2EE technology stack.
Site Maintenance — Clean Up
The older articles predating the use of WordPress are slowly being copied over to the WordPress format. This provides a common look & feel and allows WordPress seach functionality, RSS feeds, and other goodies to work properly with the older content.
Computer Measurement Prefixes and Number Naming Conventions
I always forget the quantity prefixes above “tera”. Even more interestingly, one rarely thinks about the numbers’ names. For example, consider the number