Ishan's home page

Asynchronous programming in Java with Jsp and Servlets

2011-01-21T00:47:00.000-08:00

Have you ever needed to do some task asynchronously with Jsp and servelet? If if is EJB container like jboss then we can use message driven beans or some other technique. I found a good discussion thread that has suggested few good solutions for that.

http://cephas.net/blog/2004/02/02/asynchronous-method-invocation-in-java/

Check Your Programming ability with Java

2010-08-13T00:09:00.000-07:00

Hi all, after Long time :-)

I found a nice site, which offers really good questions to test our java programming knowledge. Just go through the test. All the best

http://www.betterprogrammer.com/

MIA Paper Planes (Diss by DeLon)

2008-09-15T09:29:00.000-07:00

I found this song and thought to share it with you....

Google App Engine

2008-06-18T00:24:00.000-07:00

Although Google has announced this quite while ago, I tried it today. It is amazing service (product) by google. I don not want to write more... Here is the url... try it yourself

http://code.google.com/appengine/

Sri Lanka in top 10 contries in the GSoC 2008

2008-05-03T05:26:00.000-07:00

Google has recently announced the top 10 countries this year

See the article

I think this is a great achievement as a country. Well done guys :). Good luck with your great work.

Connecting your Nokia N70 phone in Linux

2008-01-08T07:47:00.000-08:00

I tried several ways to connect my Nokia N70 phone in my Debian box. I did it using bluetooth, but I wanted to connect it via USB. So I did some googeling, but I did not find any solution. Therefore I raised that question in LKLUG (Lanka Linux User Group) and get few responses. This is what I did.

I used this link as suggested in LKLUG mailing list.

http://think2ed.blogspot.com/2008/01/connect-your-nokia-n70-with-your-ubuntu.html

First of all I installed obexftp tool,

1.) sudo apt-get install obexftp

Using obexftp you can check whether the your phone is correctly connected to the machine.

2.) sudo obexftp -u

Above command indicates that.

All the above commands and related outputs are clearly mentioned in above link

Then I installed obextool (ObexTool is a graphical frontend for ObexFTP)

Debian repositories does not contain obextool packages.

Then I visited following link,

http://www.stud.uni-karlsruhe.de/~ubq7/debian

It contains all the repository details where obextool packages exists.

Copy following repository paths in your sources.list

deb http://www.hendrik-sattler.de/debian extra main
deb-src http://www.hendrik-sattler.de/debian extra main

execute following commands,

1.) sudo apt-get update
2.) sudo apt-get install obextool

After installing obextool, run the following command.

sudo obextool --obexcmd "obexftp -u 1"

So, thats it. now it list the contents in your mobile phone (My one is Nokia N70). It lists two letters. i.e. The phone's internal memory is accessed as C: whereas E: refers to the memory card.

Now you can exchage files etc etc...... Enjoy it :-D

Refer this link for more details

http://dburr.veritel.com.au/nokia/

Google Desktop Gadgets - Hall of fame

2007-11-24T00:45:00.000-08:00

I earlier wrote about Google Desktop and its featured gadgets. This time I am going to write you about Hall of fame :).

Before you go in to details, Just visit this page.

Hall of fame

What do you think?

This is what Google says,

"We love our developers! The first time your desktop gadget or indexing plug-in is added to our directory and shared with millions of Google Desktop users around the world, we'll send you a developer appreciation package. Subsequent submissions give you a shot at other rewards. If some of your gadgets or plug-ins become very popular, you'll earn a spot in our Developers' Hall of Fame."

As they said, I got the developer appreciation package for my first gadget - Simple calculator

Now I have developed four gadgets and you can see them in this page.

As Google said, If some of our gadgets become very popular, we can earn a spot in Developers Hall of Fame.

So all in all my Calculator gadget become very popular and Now I have a spot in Developer Hall of Fame :-D

If you go that page you can find my Name and some details of my gadgets, but my photograph not there :(. I sent my details with photograph to Google Desktop and hopefully they will publish it in future.

Finally Thanks Lahiru who motivated me to develop Google Desktop gadgets :) (Thanks machan)

Sahana

2007-11-17T07:52:00.000-08:00

"Sahana is a Free and Open Source Disaster Management system. It is a web based collaboration tool that addresses the common coordination problems during a disaster from finding missing people, managing aid, managing volunteers, tracking camps effectively between Government groups, the civil society (NGOs) and the victims themselves.:.......

Thats what Sahana web site says.

I got the opportunity to join Sahana project in February 2007 as an intern. I have heard its recognition and reputation during my university career and at that time I did not think that I will get the opportunity to contribute to that project.

All the credits should go to Core developers (Chamindra, Pradeeper, Ravindra, Mifan and rest...). They have done a tremendous job to bring the project into this stage.

I love FOSS, I like to contribute to FOSS, So I just started to doing it now. :-D

Gentoo Linux

2007-09-29T02:17:00.000-07:00

"Gentoo is all about choices. When installing Gentoo, this is made clear to you several times -- you can choose how much you want to compile yourself, how to install Gentoo, what system logger you want, etc."

Read more

With a sudden decision, yesterday night, I tried to install Gentoo on my desktop machine. I am happy to say that, I did it :D. After one sleepless night, now I have working Gentoo box (BTW I am still installing Gnome).

They provide very useful manual to do so :). If you carefully follow it, you will be definitely succeed.

But something went wrong in my installation as I could not set up Grub correctly. Anyway I managed to setup LILO instead. I could not figure out the mistake I made. BTW I droped a mail to LKLUG regarding that issue and hopefully I will get an answer soon.

I will write my new experience on Gentoo. So, its time to do more and more hacking on Gentoo.

Google Desktop Gadgets

2007-09-07T10:16:00.000-07:00

It is really fun. If you have free time, just try to code small gadget using Google Desktop API. It is really not much difficult thing ;-). This SDK lets us create gadgets and indexing plug-ins for Google Desktop.

for more info

http://desktop.google.com/dev/index.html

After creating your gadget, you can submit the software. Then Google will do a review and if your software performs well, they will approve it. Then you can find it by selecting the appropriate category from the links on the left side and scrolling down to your listing.

for more

http://desktop.google.com/plugins/

To reward your creative talents, they would give you a limited edition Google Desktop Developer's patch or ........bla bla bla .. :D

I have developed small gadget so far and I am happy to say that they approved it. :)

So its time to develop more and more gadgets......... hope you will too.. cheers

Calculate your GPA

2007-08-20T09:43:00.000-07:00

You can calculate your GPA using this. :-)

Firefox vs IE(Internet Explorer)

2007-07-26T09:01:00.000-07:00

Well firefox and Internet explorer, two different web browsers (and mostly use). So I thought to give some clues to select what is the best browser. I have some experience in developing web application using AJAX and CSS and ....... Ooops most of the times it generate some kind of bugs in IE (as it does every time ;-)). That is the reason why I am writing this article here.

Here are some related articles

1.) hmmmm good one
2.) excellent one
3.) oops yet another one ;-)

I think this is enough at the moment.

Apart from those articles, one big difference exists between them. Can you guess?

In most of the sites,

Firefox shows "DOWNLOAD it from here". :-)

IE shows "Check prices" :-(

"Lets use Firefox ;-)"

Google Summer of Code 2007

2007-07-19T09:35:00.000-07:00

:-) Starting with smile since this my first non technical article (That does not mean I am technical person ;-) ).

Although it was announced in February, finally I thought to write something. ;-)

It is annual program started in 2005.
"We accepted over 900 student applicants from a pool of nearly 6,200 applications." ----- Google.

So I am amongst that 900 :-). I submitted two proposals for Sahana project. One about GPS and other about AJAX. OOps my GPS proposal got rejected. :-(

Finally, other one that is my own idea "Complete AJAX library for Sahana" accepted. :-D

Now I am in the process of developing that library and I am on schedule I guess ;-). So I am pretty sure I will be able to submit my final delivery on time.

This is amazing program. Thanks Google ! :-)

Internet Explorer on Linux

2007-06-14T20:23:00.000-07:00

If u are a linux web developer, sometimes you need to test your web application in Internet Explorer (cos IE has some problems and differs when compares with firefox ;-) ).

for do that u dont have to log on to (problamatic)windows OS. Just install IE in linux.

here is the url

http://www.tatanka.com.br/ies4linux/page/Installation

Set up Sinhala in Linux

2007-04-15T21:38:00.000-07:00

Here is two useful links that you can set up and configure Sinhala in Ubuntu edgy and Debian etch

http://www.nongnu.org/sinhala/doc/howto/sinhala-howto.html

then use following link to do more stuff

http://anuradha-ratnaweera.blogspot.com/search?q=si_LK

cheers

configure internal modem in linux

2007-02-11T19:32:00.000-08:00

You can configure ur internal modem to surf the internet in linux.

use following steps

wget -c http://linmodems.technion.ac.il/packages/scanModem.gz
gunzip -c scanModem.gz > scanModem
chmod +x scanModem
sudo ./scanModem
gedit Modem/ModemData.txt

read the above ModemData.txt file and check www.linmodems.org
or www.linaxant.com for ur modem driver.

it is iteresting, now u can browse internet in linux and it is always safe from the viruses.

Changing root's password

2006-10-23T09:45:00.000-07:00

This trick works well if you have forgotten your superuser password, type linux single at a
LILO/Grub prompt. Then passwd once the system has started and you are at a console.

Grub:
If you are using grub go to the relevant line (the one with the kernel and various options) then
press 'e' for edit and add "single" on to the end of the lines that boot the kernel. Then hit
[Enter] and press 'b' (to boot).

Lilo:
If you are using lilo press escape and type " linux single" and then hit [Enter] to boot.

Security Warning
This is also a basic security hazard if you have others using your computer and
security is a concern, you may like to add a password to your LILO or Grub prompt to
stop this from being done.

How to restore Grub from a live Ubuntu cd.

2006-10-19T20:03:00.000-07:00

This will restore grub if you already had grub installed but lost it to windows install or some other occurrence that erased/changed your MBR so that grub no longer appears at start up or it returns an error.

Boot into the live Ubuntu CD. This can be the live installer or older Live session of Ubuntu cd.

When you get to the desktop, open a terminal and type following commands.

sudo grub

This will get you a “grub>” prompt.

>find /boot/grub/stage1

This will returns a location.If you have more than one, select the installation that you want to provide the grub files.

Next, THIS IS IMPORTANT, whatever was returned for the find command use it in the next line (you are still at grub>. when you enter the next 3 commands)

>root (hd?,?)

Again use the value from the find command i.e. if find returned (hd0,1) then you would enter root (hd0,1)

Next enter the command to install grub to the mbr.

>setup (hd0)

Following output will be displayed on your screen if the grub re-installed successfully.

Checking if "/boot/grub/ stage1" exists... yes

Checking if "/boot/grub/ stage2" exists... yes

Checking if "/boot/grub/ e2fs_stage1_ 5" exists... yes

Running "embed /boot/grub/e2fs_ stage1_5 (hd0)"... failed (this is not fatal)

Running "embed /boot/grub/e2fs_ stage1_5 (hd0,10)"... failed (this is not fatal)

Running "install /boot/grub/stage1 d (hd0) /boot/grub/stage2 p /boot/grub/menu. lst "... succeeded

Done.

Finally type the “quit” to exit from the “grub>” prompt. Then reboot the machine. So you will see the grub menu at startup.

Use attached script to install firefox2RC3 in linux

2006-10-19T19:55:00.000-07:00

instructions:
1) copy script in to your home folder
2) download firefox2RC3 from
(linux only ) smb://192.248. 17.175/tuxy/ application/ firefox-2. 0rc3.tar. gz
ftp://ftp.mozilla. org/pub/mozilla. org/firefox/ releases/ 2.0rc3/linux- i686/en-US/ firefox-2. 0rc3.tar. gz
3) copy it to home folder
4) run script
# ./bonechoRC2. sh

5) have fun!

note: U can find windowx versions also @ ftp://ftp.mozilla. org/pub/mozilla. org/firefox/ releases/ 2.0rc3/win32/ en-US/Firefox% 20Setup%202. 0%20RC%203. exe

glade(interface designer for C)

2006-10-03T21:05:00.000-07:00

Hey Guys,

A Interface designer which produces code in C was something which I have
been searching for a long time. I found a application which I sense is a
Great Tool which enables Interface Designing in GTK+

Glade is a free user interface builder for GTK+
and GNOME , released under the GNU GPL License
.

The user interfaces designed in Glade are saved as XML, and by using the
libglade library these can
be loaded by applications dynamically as needed. (Glade can also
generate C code, though this isn't recommended for large applications.)

By using libglade, Glade XML files can be used in numerous programming
languages including C, C++, Java, Perl, Python, C#, Pike, Ruby, Haskell,
Objective Caml and Scheme. Adding support for other languages is easy too.

extracted from the GLADE site
http://glade.gnome.org/

Search for "glade" in Synaptic and install, then ur ready to design
GUI's
if the cache doesn't work you can install the 3 files attached here..

But you will have to learn a bit about programming in GTK to make full
use of this.

Lets Start making cool Interfaces..

All the best

glade_2.12.1-1ubuntu5_i386.deb
404K Download

glade-2_2.12.1-1ubuntu5_all.deb
102K Download

glade-common_2.12.1-1ubuntu5_all.deb
150K Download

vista theme on ubuntu

2006-10-03T20:58:00.000-07:00

HI guys,
U can install vista theme on ubuntu. For that download
(GTK+Icons+Metacity) and
(Screenshot icon theme Dropline Neu!) from following
URL.
http://www.gnome-look.org/content/show.php?content=44570
Next,

1.Click on the Main Menu button. Go to System>Preferences>Themes.

2.Click on the Install theme button , open the bz2 or tar file.

3.Next install theme Dropline Neu.

4.In the Controls Tab select Lintsa_3 , in the Window border tab select
Linsta_3 and in the Icons tab , select Dropline Neu.

4. Save the theme as Vista.
Have nice day!

blender( equivalent to 3d max)

2006-10-03T20:53:00.000-07:00

There are some great Tutuorials in the Wiki Books in the Link given Below
about Using BLENDER

This book is a series of tutorials arranged in a sequence to help the newbie
user become a Blender expert.
Noob_to_Pro

Here is the WIKI BOOK home for WikiBook
Blender

Installing Packges to ubuntu linux

2006-10-03T20:46:00.000-07:00

A main problem for us who do not have Fast Internet access at home when
using ubuntu is the difficulty when installing packages.

To overcome this, THIS IS THE BEST SOLUSION

All the packages that you install in the lab's Machine are stored in
the /var/cache/apt/archives folder. You can take these .deb
packages and install the packages with the dependencies as well.

Here are little tips to create an apt cache on a local hard disk

...............................................................................................................................................
Step 1:
Install dpkg-dev package
sudo apt-get install dpkg-dev

...............................................................................................................................................

Step 2:
Create a directory where ever you like and copy your all
deb packages to it.
use a example dir to show how to do it,
#mkdir /var/newCache
#cp -a /folder of deb packages/ *.deb /var/newCache
...............................................................................................................................................

Step 3:
Open your favourite terminal and go to the directory
(folder) with deb packages
eg:-
#cd /var/newCache

...............................................................................................................................................

Step 4:
Run dpkg-scanpackages, send the output to a file Packages
and compress it.

#dpkg-scanpackages . /dev/null > Packages
#gzip Packages

You can also do the previous step in one command

#dpkg-scanpackages . /dev/null | gzip - > Packages.gz
...............................................................................................................................................

Step 5:
Add the directory (say /var/newCache) into /etc/apt/sources.list

deb file:///var/newCache ./

(NOTICE: The directotry '/foo/bar' should be replaced with your
actual directory path which contains deb packages)
...............................................................................................................................................
Step 6
Finally run `apt-get update' to update apt's list of packages.
#apt-get update

Good luck!!!!!

Suicide Bomb

2006-07-18T20:58:00.000-07:00

Suicide bomb in live

2006-07-18T20:51:00.000-07:00

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