Blog
Articles, tutorials, and field notes on identity, integration, API management, and application security — spanning nearly two decades of hands-on work.
Generating Thread Dumps from a Sun or IBM JVM Running As A Windows Service
I was recently asked if there was a way to generate a Thread Dump from a JVM running as a Windows Service. It occured to me that I had a similar issue during my Masters Project when I was trying to generate a thread dump from a Cygwin xterm; Googling at the time turned up no good way of accomplishing the task. But, I knew that you could use the Java Debugger that ships with the Sun JDK, jdb, to generate a thread dump of all non-System Threads in a JVM. I posed this as a solution to generating Thread Dumps from a JVM running as a Windows Service.
Performance Tuning In Industry
IT Professionals face an up hill battle in the realm of performance tuning. First, management must be convinced that time needs to be set aside for it. Next, the skill sets to successfully move through the performance tuning life cycle must be present. Then, the tools to effectively identify issues…
Part 2: Custom Client-Server Java Application That CommunicatesOver A Mutually Authenticated SSL (MASSL) Connection
This is the second of a two-part series discussing Java and Mutually Authenticated SSL. This will gave you a taste of how a J2EE container is communicating (over SSL or MASSL) behind the scenes.
Part 1: Creating your own SSL certificates for a custom Java client-server application
If you replace the steps for creating your own CA private key & certificate and signing your own certificate (with the CA) with having certificates signed by a legitimate Certificate Authority, you've got the basic idea behind creating/ordering certs for most situations.
Achieving highly available HTTP database session persistence spanning multiple cells with Websphere v6.1
Websphere can provide HTTP Session data replication across multiple clusters and cells by using database session persistence.
References I Cited in My Masters Project
This week (er, quarter), I wanted to share the references I used while researching my Masters Project. It’s a collection of about fifty web links and books that I found helpful. Reading this stuff and staring at long sequences of numbers represents about eighteen months of my life. More information…
These are the references I cited in my Masters Project Defense
So, obviously, I haven’t been adding to this site nearly as often as I had hoped. This week (er, quarter), I wanted to share the references I used while researching my Masters Project. It’s a collection of about fifty web links and books that I found helpful. Reading this stuff and staring at long…
Masters Project Defense
On November 29, 2007, I gave my Masters Project Defense before Dr. Chris Gill, Dr. Cindy Grimm, and Dr. Roger Chamberlain. This is the presentation. I’m posting it here because it involved analyzing low-level details of a Sun JVM running JBoss 3.x.
Masters Project
On November 29, 2007, I gave my Masters Project Defense before Dr. Chris Gill, Dr. Cindy Grimm, and Dr. Roger Chamberlain. This is the presentation.
Flying Over Mars
I’ve had this one sitting on the shelf for a while. The last semester of my undergraduate program at Wash U., I created a flight simulator program that could be used to view Martian terrtain data. We created this by grabbing a series of still shots while the flight simulator was running.
The First 1500 Hamming Numbers
I haven’t had a chance to post anything here since the beginning of last semester. I’m in a class at the moment where all of the programming assignments involves annoying little math algorithms. The most recent required us to generate the first N hamming numbers using an efficient algorithm that…