It's a place to be ... The Apache Asia Roadshow 2009

The Apache Asia Roadshow 2009 is scheduled to hit Colombo from the 3rd - 5th of December. The layout of the Roadshow would be a two day conference and a one-day hackathon/ unconference at the beach. If you are interested in anything Apache related then this is the place to be

http://www.apacheasia09.foss.lk

PGP encryption

I've been configuring PGP /SMIME to encryption for one of our email application. I found some useful links for anyone who needs to workout this. You can check samples to work out this.

http://www.bouncycastle.org/

http://www.bouncycastle.org/java.html

http://javamail-crypto.sourceforge.net

Performance issues with java

Performance issues with java have been a real hazard for application deployment over the years. I was involved in many of the projects as performance engineer where I had to resolve some real time server crashing issues. Many of problems occurred due to improper memory handling with application development. The bottom line of this is application developer has no sense of what its look like during the deployment which apparently leads to many of the problems.

Memory leaks

If your application keeping reference to objects that are no longer used, it leads to memory leaks.

High Memory usage / Insufficient object creations

Modernized applications keep loads of information on user events in order to comfort user in turn it can be an overhead to your application memory space if you don’t manage it properly. Also some applications create very high amount of objects for use of keeping large set of information.

Garbage Collector

GC too can be a problem if you don’t configure it properly. You will need to run lots of profiling tests, loading tests and find optimum configuration for your system. Also if your application creates series of objects in very short period of time, it would be a very costly task for GC to perform its GC operations accordingly. The more frequently it creates, it demands the CPU a big time.

tech-chat-rich-sharples

http://java.dzone.com/videos/tech-chat-rich-sharples

How Do You Convince Your Boss to TDD?

Really good article.

http://java.dzone.com/articles/how-do-you-convince-your-boss

Refactoring legacy system...

Re-factor a legacy system is any passionate developer’s nightmare (I said re-factor NOT re-engineer). Job is really hard to go over chunk of code and try to make them in a correct order most importantly with out touching the flow of the program and with out touching the base design. As I go over it, I happen to find so much of buggy codes...not really bugs… I would say “not properly written” codes. There are number of places I can see where I need to optimize but I’m limited by the time and scope I can change over. On the other hand there is a saying “if something works don’t try to change". Sometimes I really finding it interesting to do things in different ways but other time its very boarded to move codes here and there, change variable names… etc. I work on the heart of the company base system and it really needs concentration to finalize better design.

This is kind of exercise where you get to change your wheels while you are on ride. The most difficult thing is to think through all possible issues with out practice TDD.

Working on Rules Engine ...

Started to design a rules engine that can execute simple rules describe in a XML config. Obviously this will look simpler but idea is to cater dynamic change of requirements on operational flow of an entire business process...
In my mind i have what i needs to achieve but it’s too early to estimate how far this will turn good... Anyway i will do more readings on SOA, ESB and other rules engine standards soon...