One of my colleague explained me a very nice story he learned by reading the book called “Outliers”. According that book, it says Asian are some what smarter when it come to mathematics. And there is a nice story behind that too, that is the number system they used. For example in English we start with, one, two three.... , ten, eleven, twelve, thirteen, fourteen and etc... , if you think carefully. In English language though you pronounce as thirteen fourteen you write them differently. As en example when we call thirteen, it gave impression that the number is going to start with three, in fact it does not.
So, according the book this complexity make some issues in the childhood.
After listening to my friend I thought though this, then I found even in my own language (Sinhalese) we have some confusion. For example in Sinhalese when it come to 15 we pronounce is differently than other numbers, simply we break the sequence. From eleven to twenty we have a right sequence, the way we write and read is same except number 15.
Friday, July 03, 2009
Tuesday, June 09, 2009
How to fix MBR using Ubuntu live CD
When we have dual boot there are some possibility that we might delete one of the partition, and causing deleting MBR as well. Issues can be easily fix using Windows CD, however you need to remember the password, if not ..
Ubuntu Live CD comes handy this case, just follow the following steps, you will be back in business.
Ubuntu Live CD comes handy this case, just follow the following steps, you will be back in business.
- Boot from Ubuntu Live CD
- Then you need to download the ms-sys, you can find that from - http://packages.ubuntu.com/dapper/i386/ms-sys/download
- Once downloaded it will ask for auto install, click that
- Next type “sudo fdisk -l” , from that you can find the main partition you want to fix
- Then type “sudo ms-sys -m /dev/sda”
- Next restart, everything should work fine.
Axis2 1.5 released
Axis2 1.5 released and available to download, this is a major release and has a number of changes
You can download the release from http://ws.apache.org/axis2/
Thank you for using Axis2.
- Removed the JDK 1.4 compatibility, now Axis2 works JDK 1.5 and above
- Moving transport to a separate package
- A number of bug fixes and
- Many more new small scale improvements
You can download the release from http://ws.apache.org/axis2/
Thank you for using Axis2.
Sunday, June 07, 2009
Axis2 tutorials and articles
I have written a number of articles on Axis2, and those covers various topics on Axis2. However sometimes it is hard to find what you want, so I compiled a list of articles and categorized them in somewhat organized manner. I believe that will help to find the document you want with minimum time. And I will keep on updating this list, so that you can find all Axis2 articles in one place.
Axis2 Architecture
Axis2 Deployment
Axis2 Handlers
Axis2 Transport
Axis2 Session
Axis2 Configurations
Quickstart Apache Axis2
Axis2 Architecture
Axis2 Deployment
- The Axis2 Deployment model, Part 1: Six ways the Axis2 deployment model is more user friendly
- Understanding Axis2 Deployment Architecture
- Axis2 Deployment Model
- Axis2 deployment – Custom deployers
- Writing an Axis2 Service from Scratch
- Exposing a Database as a Web Service
- Working with Axis2: Making a Java Class into a Service
- Getting Started with Axis2 - Plain Old Java Objects
Axis2 Handlers
Axis2 Transport
Axis2 Session
- Axis2 Session Management
- Axis2 Session Management
- Axis2 Session Management part 2
- Transport Session Management with Axis2
Axis2 Configurations
- Learning axis2.xml - Part1
- Axis2 Configuration Part 2 – Learning axis2.xml
- Writing Your Own services.xml for Axis2 Web Services
- Avoiding Mistakes Made Using Axis2
- Embedding Apache Axis2 into Existing Applications
- Binary Data with Axis2
- How to Control Binding Generation in Axis2 ?
- Different Ways of Creating a ConfigurationContext in Axis2
Quickstart Apache Axis2
Wednesday, June 03, 2009
Power of Code generation
Code generation is so powerful technology, and it is been used for various purposes and various places, and code generation is not a new concept as well. In the past even though people have not used the same name they have used the same concepts. Normally any given code generation tool there are four parts, and number of steps and component may very from one component to other
A classic example of code generation can be seen in the Web Service field, there people use code generation to generate service and client code from a WSDL. In that case the configuration file would WSDL, and the transformation would be WSDL to Java, and transformation option would be, web service framework, language and etc..., and finally the output would the either or both service skeleton and the stub.
One other powerful use case of code generation is testing, specially in the process of staging testing, where we have some SLA to meet. We generate the code (scripts and configurations) and then measure the results, if it does not meet the expectation then we change the code generation configuration and re-generate the code and measure the results. We do this process until we get the expected results, doing this kind of process manually is so hard as well as error prone.
The most difficult part of the code generation is to identify the requirements including the input configuration and output format. Once we have that code generation is easy, and once we have the code generation tool, doing testing is so easy.
Most of the time what people do is do the experiments(testing) manually in a very small scale, and then use those code and configuration to build a code generation tool.
- Code generation configurations
- Transformation
- Transformation configuration
- Code generation
A classic example of code generation can be seen in the Web Service field, there people use code generation to generate service and client code from a WSDL. In that case the configuration file would WSDL, and the transformation would be WSDL to Java, and transformation option would be, web service framework, language and etc..., and finally the output would the either or both service skeleton and the stub.
One other powerful use case of code generation is testing, specially in the process of staging testing, where we have some SLA to meet. We generate the code (scripts and configurations) and then measure the results, if it does not meet the expectation then we change the code generation configuration and re-generate the code and measure the results. We do this process until we get the expected results, doing this kind of process manually is so hard as well as error prone.
The most difficult part of the code generation is to identify the requirements including the input configuration and output format. Once we have that code generation is easy, and once we have the code generation tool, doing testing is so easy.
Most of the time what people do is do the experiments(testing) manually in a very small scale, and then use those code and configuration to build a code generation tool.
Sunday, April 26, 2009
Scam from yahoo messenger
I have been using Yahoo messenger more than 9 years, but did not have bad experience with that. However now I am starting to get a number of scam from Yahoo messenger. One thing I noticed is that all the scam I got when the person who is sending is off-line. So I do not know whether I am also sending those kind of message, if I have done : Please forgive me . I do not receive those scam from all the people in my contact list, but from only few. One of the common message I get
“Wow I finally found a way to lose weight and is inexpensive ...”
I think yahoo should take some action to stop this kind of scam, if the current security mechanisms are not enough to stop those scams, then they need to find an alternative to stop. The main reason is Yahoo is one of the most commonly use IM.
“Wow I finally found a way to lose weight and is inexpensive ...”
I think yahoo should take some action to stop this kind of scam, if the current security mechanisms are not enough to stop those scams, then they need to find an alternative to stop. The main reason is Yahoo is one of the most commonly use IM.
Monday, March 30, 2009
Xen: finishing the job
Once upon a time, Xen was the hot virtualization story. The Xen developers had a working solution for Linux - using free software - well ahead of anybody else, and Xen looked like the future of virtualization on Linux. Much venture capital chased after that story, and distributors raced to be the first to offer Xen-based virtualization. But, along the way, Xen seemed to get lost. The XenSource developers often showed little interest in getting their code into the mainline, and attempts by others to get that job done ran into no end of obstacles. So Xen stayed out of the mainline for years; the first public Xen release happened in 2003, but the core Xen code was only merged for 2.6.23 in October, 2007.
A nice article by Jonathan Corbet, which compare Xen and KVM. (worth reading)
A nice article by Jonathan Corbet, which compare Xen and KVM. (worth reading)
Thursday, March 26, 2009
Apache Software Foundation is 10 years old
Apache Software Foundation celebrated its 10 year anniversary at ApacheCon EU. According to my knowledge ASF is one of the best open source foundation in the world. And it has a number of different projects. I am so happy to be a part of ASF and I am contributing to apache since 2004, so it is almost 5 years now. ASF has creatde a web page including most of the highlights of the last 10 years, I think it is worh reading.
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