Sunday, November 22, 2009
A "significant amount" ...
then i kept reading the feedbacks and comments of the people. Then i identiyfied that many people are really excited about this matter as me and some are aginst wasting money for 2 buckets of water in moon.
The points people discuss are seeems to be really true for me in both sense. But i really belive we are living becouse of hope. So everyday we need something new to live. This is one of the news that change the future.
Friday, September 11, 2009
University of Moratuwa hits top in Google Summer of Code
The statistics of GSoC can be listed as follows.
Top 10 Schools in 2009 by # of Accepted Students
Sri Lanka - University of Moratuwa - 22
Brazil - University of Campinas / UNICAMP - 12
China - Graduate University of Chinese Academy of Sciences - 11
Romania - Polytechnic University Of Bucharest - 11
Poland - Gdansk University of Technology - 10
Austria - Vienna University of Technology - 9
India - Birla Institute of Technology and Science Pilani, Goa campus - 9
Sweden - Royal Institute of Technology - 9
India - Institute of Technology, Banaras Hindu University - 8
Singapore - National University of Singapore - 8
And for comparison:
Top 10 Schools 2005 - 2009 by # of Accepted Students
Sri Lanka - University of Moratuwa - 79
Brazil - University of Campinas / UNICAMP - 37
Canada - University of Toronto - 34
Austria - Vienna University of Technology - 31
China - Graduate University of Chinese Academy of Sciences - 30
United States - University of Illinois at Urbana-Champaign - 28
Poland - Wroclaw University of Technology - 27
Hungary - Budapest University of Technology and Economics - 21
Canada - Carleton University - 21
Romania - Alexandru Ioan Cuza University of Iasi - 20
The original article about this can be found here
Wednesday, August 12, 2009
My First 3D Movie Experience
As i feel this a simple thory that was mplemeted time ago and now it has come to a better level. When i serched on web for the technology it expalined here.
This is how you see the screen if you look at the screen without glasses.
Friday, August 07, 2009
How to put 13 keys inside 4 cm X 1.5 cm area ??
This Keypad has 17 keys in a area of size 9.5X6.5. So If we calculate the area of a unit key, that will be 3.63 (cubic centimeters per key). But the good thing is this keypad is extremely easy to use. I can type super fast even without looking at the keys.
Then a general calculator. Normal size of a general calculator will be either same as that of a Keypad or less. We'll amuse that it is of size 8X5. So the area of a unit key will be 1.53.
And this is the most probable answer for my question. It's super cool. I know there are plenty of keys inside this tiny area. BUT who are you going to press those?. The area is around 2X2 cm in size. And have 16 keys on it. I don't see any use of all the keys if you don't have a pin. So the unit area for a key is 0.25.
The Other keypad that everybody users now a days is the mobile keypad. This is taken from the N95. it has 12 keys in a area of 4.5x2.5. So the area of a one key can be calculated as 0.93. This key pad is far better sample of a compact design.
But still why people do not think out of the box?? All the above samples demonstrate the very traditional way of arranging keys. The following image is the answer that i was looking for. I was really amazed by the design. You can use is as easily as the very first once. You dont need to look at it once you get used to it. And its not a pin head operating pad.
And if you count the number of keys there that is 13. And the area taken by a single key is 0.46.
So from next time when you asked to think out of the box, don't recall the history. Think of something new, and it will make you a real designer & a revolutionary person like Albert Einstein.
Wednesday, August 05, 2009
WSO2 & Its Service of 4 years
"WSO2 is a Web services software platform company with a difference.
We are creating an uncompromising middleware platform for Web services which treats Web services as first class components instead of as a facade to some existing platform like J2EE. Apache Axis2 is the first SOAP stack which espouses this design in its guts: we focus entirely on doing what's right for Web services first. We make no apologies for being XML centric instead of Java object centric. An add-on layer allows Axis2 to play by the, sometimes klunky, Java rules and regulations (like JAX-RPC) for those who want the comfort of (and are willing to pay the price of) those rules & regulations.
The best part is, all of our software is available free under an open source license.
The even better part is, we are not just giving the software away under open source licenses, but we are also developing it in true open source fashion fully involving the user community. Our role in Apache Web services projects proves that but much more is to come. We've only just begun.
In WSO2, in addition to building the pieces in Apache, we are working on offering integrated Web services server stacks which will provide uncompromising solutions to those looking for the absolute best Web services middleware. "
The good thing with the company is it gave a meaning to the Open Source community in SL. And it earns a large amount of money inside to the country. And the best thing i see is the higher level management (specially Dr. Sanjiva Weerawarana) allows and help workers to continue their studies in PhDs. The comapny makes a platform for the employees, to be famous in the open source world and to make their study plans easier.
I wish all the best for WSO2 and i wish sri lanka to have many other new companies who servres Sri Lanka and lift the quality people.
Monday, August 03, 2009
Use IdeaScale and Brainstorm your ideas
The ultimate measure of an idea is determined by a voting system. Any idea can be voted to the top or buried back down to the bottom. It combines the "wisdom of the crowds" concept with Web 2.0 models like Digg.
IdeaScale enables Customer Engagement which is beyond customer satisfaction. Interact with your customer community through an IdeaScale portal that puts your customer on a level playing field instead of second class citizens.
The basic account can be created on Free of charge at the IdeaScale home page. Brainstorm you ideas and Enjoy.
Wednesday, July 29, 2009
Installing Nagios on Fedora (Quick)
During portions of the installation you'll need to have root access to your machine.
Make sure you've installed the following packages on your Fedora installation before continuing.
* Apache
* GCC compiler
* GD development libraries
You can use yum to install these packages by running the following commands (as root):
yum install httpd
yum install gcc
yum install glibc glibc-common
yum install gd gd-devel
1) Create Account Information
Become the root user.
su -l
or
sudo su
Create a new nagios user account and give it a password.
/usr/sbin/useradd -m nagios
passwd nagios
Create a new nagcmd group for allowing external commands to be submitted through the web interface. Add both the nagios user and the apache user to the group.
/usr/sbin/groupadd nagcmd
/usr/sbin/usermod -a -G nagcmd nagios
/usr/sbin/usermod -a -G nagcmd apache
2) Download Nagios and the Plugins
Create a directory for storing the downloads.
mkdir ~/downloads
cd ~/downloads
Download the source code tarballs of both Nagios and the Nagios plugins (visit http://www.nagios.org/download/ for links to the latest versions). At the time of writing, the latest versions of Nagios and the Nagios plugins were 3.0.3 and 1.4.11, respectively.
wget http://osdn.dl.sourceforge.net/sourceforge/nagios/nagios-3.0.6.tar.gz
wget http://osdn.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.11.tar.gz
3) Compile and Install Nagios
Extract the Nagios source code tarball.
cd ~/downloads
tar xzf nagios-3.0.6.tar.gz
cd nagios-3.0.6
Run the Nagios configure script, passing the name of the group you created earlier like so:
./configure --with-command-group=nagcmd
Compile the Nagios source code.
make all
Install binaries, init script, sample config files and set permissions on the external command directory.
make install
make install-init
make install-config
make install-commandmode
Don't start Nagios yet - there's still more that needs to be done...
4) Customize Configuration
Sample configuration files have now been installed in the /usr/local/nagios/etc directory. These sample files should work fine for getting started with Nagios. You'll need to make just one change before you proceed...
Edit the /usr/local/nagios/etc/objects/contacts.cfg config file with your favorite editor and change the email address associated with the nagiosadmin contact definition to the address you'd like to use for receiving alerts.
vi /usr/local/nagios/etc/objects/contacts.cfg
(you can use any editor as you wish)
5) Configure the Web Interface
Install the Nagios web config file in the Apache conf.d directory.
make install-webconf
Create a nagiosadmin account for logging into the Nagios web interface. Remember the password you assign to this account - you'll need it later.
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Restart Apache to make the new settings take effect.
service httpd restart
Note Note: Consider implementing the ehanced CGI security measures described here to ensure that your web authentication credentials are not compromised.
6) Compile and Install the Nagios Plugins
Extract the Nagios plugins source code tarball.
cd ~/downloads
tar xzf nagios-plugins-1.4.11.tar.gz
cd nagios-plugins-1.4.11
Compile and install the plugins.
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
7) Start Nagios
Add Nagios to the list of system services and have it automatically start when the system boots.
chkconfig --add nagios
chkconfig nagios on
Verify the sample Nagios configuration files.
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
If there are no errors, start Nagios.
service nagios start
8) Modify SELinux Settings
Fedora ships with SELinux (Security Enhanced Linux) installed and in Enforcing mode by default. This can result in "Internal Server Error" messages when you attempt to access the Nagios CGIs.
See if SELinux is in Enforcing mode.
getenforce
Put SELinux into Permissive mode.
setenforce 0
To make this change permanent, you'll have to modify the settings in /etc/selinux/config and reboot.
Instead of disabling SELinux or setting it to permissive mode, you can use the following command to run the CGIs under SELinux enforcing/targeted mode:
chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/
chcon -R -t httpd_sys_content_t /usr/local/nagios/share/
For information on running the Nagios CGIs under Enforcing mode with a targeted policy, visit the NagiosCommunity.org wiki at http://www.nagioscommunity.org/wiki.
9) Login to the Web Interface
You should now be able to access the Nagios web interface at the URL below. You'll be prompted for the username (nagiosadmin) and password you specified earlier.
http://localhost/nagios/
Click on the "Service Detail" navbar link to see details of what's being monitored on your local machine. It will take a few minutes for Nagios to check all the services associated with your machine, as the checks are spread out over time.
10) Other Modifications
Make sure your machine's firewall rules are configured to allow access to the web server if you want to access the Nagios interface remotely.
Configuring email notifications is out of the scope of this documentation. While Nagios is currently configured to send you email notifications, your system may not yet have a mail program properly installed or configured. Refer to your system documentation, search the web, or look to the NagiosCommunity.org wiki for specific instructions on configuring your system to send email messages to external addresses. More information on notifications can be found here.
What You'll End Up With
If you follow these instructions, here's what you'll end up with:
* Nagios and the plugins will be installed underneath /usr/local/nagios
* Nagios will be configured to monitor a few aspects of your local system (CPU load, disk usage, etc.)
* The Nagios web interface will be accessible at http://localhost/nagios/
Monday, July 27, 2009
Solved : Adding Perfromace Data to External Scripts in NSClient++ for Nagios
echo off
echo <string>^|<performance data>
exit <code>
Explanantion of the tags given in the sample can be given as follows.
<string> : Just a string with Nagios Status Information. No Specific way of this string
^| : the HAT (^) mark before the pipe(|) is used to avoid the pipe symbol making a dos command
<performance data> : Making this data in a specific way helps you to use many graphing techniqus (such as pnp4nagios) without any problem. It should come as "<key>=<value>;<warn>;<critical>;<min>;<max>"
<code> : the code can be a value from 0 to 3. 0-OK, 1-WARNING, 2-CRITICAL, 3-UNKNOWN, will be displayed on Magios Status.
So the final sample code of a .bat file can be shown as follows.
echo off
echo CPU works fine. ^| CPU_Load=34;70;95;0;100
exit 0
This will show that the current CPU_Load is 34, 70 is the level of WARNING and 95 is the level of CRITICAL. And the value varies from 0 to 100. And the exit code 0 shows that the Status is OK. The Status Information shows that "CPU works fine"
For more information you can check Nagios Performance Data, Nagios Plugin API and Thread By Michael Medin on this matter in NSClient++
Thursday, July 23, 2009
Problem "rrd not found" (Nagios - PNP)
The first thing that you should check is the availability of performance data in the particular service. But if it is empty as shown below PNP will not generate any of the graphs for it.
So you have to find a way to add Performance data to the specific service to make the graphs. Currently im going to search the way of doing it. And I'll post about it very sooner.
Check my next post for the answer.
Monday, July 13, 2009
Problem reading Google RSS from Java
java.io.IOException: Server returned HTTP response code: 403 for URL:
Here im using Rome to read the RSS feeds made by a google group. Here other than passing the url to XmlReader, im passing a URLConnection. But the difference is, here im faking this request as a request made by a Mozilla browser, by setting up the User-agent property.
urlConn.setRequestProperty("User-agent","Mozilla/2.0.0.11"); reader = new XmlReader(urlConn); SyndFeedInput input = new SyndFeedInput(); SyndFeed feed = input.build(reader);
And i guess you cant make more than 1000 requests for the google per day. So dont make any applications which exceed that limit.
Enjoy !!
Read RSS using ROME ( sample code )
Considering you have all the required jar files we will start with reading the RSS feed. ROME represents syndication feeds (RSS and Atom) as instances of the com.sun.syndication.synd.SyndFeed interface. This library can be downloaded from here.
ROME includes parsers to process syndication feeds into SyndFeed instances. The SyndFeedInput class handles the parsers using the correct one based on the syndication feed being processed. The developer does not need to worry about selecting the right parser for a syndication feed, the SyndFeedInput will take care of it by peeking at the syndication feed structure.
A sample java code can be described as follows:
package com.infosys.hanumant.rome; import java.net.URL; import java.util.Iterator; import com.sun.syndication.feed.synd.SyndEntry; import com.sun.syndication.feed.synd.SyndFeed; import com.sun.syndication.io.SyndFeedInput; import com.sun.syndication.io.XmlReader; /** * @author Hanumant Shikhare */ public class Reader { public static void main(String[] args) throws Exception { URL url = new URL("http://viralpatel.net/blogs/feed"); XmlReader reader = null; try { reader = new XmlReader(url); SyndFeed feed = new SyndFeedInput().build(reader); System.out.println("Feed Title: "+ feed.getAuthor()); for (Iterator i = feed.getEntries().iterator(); i.hasNext();) { SyndEntry entry = (SyndEntry) i.next(); System.out.println(entry.getTitle()); } } finally { if (reader != null) reader.close(); } } }
Sunday, July 05, 2009
email to rss
In the web there are some systems available like MailBucket. And these are some gateways which converts email messages to a RSS feed.
But if you check in Google Groups, it will give you a faster and easy way to convert all the mails which are going inside the group emails.
Monday, May 18, 2009
My Wish !
At this time i should be happy as a person, because the SL forces won the war against terror. Im really lucky to witness the ending of Sri Lanken war.
Still i dont like the concept of WAR, whcih is mainly killing people. But when a war is happening with a terrorist group, its a dilema to fight or not to fight. If you dont kill them, they will kill civilians and harm public asstets. But still the terrorists are humans as well. And many of them dont know why they are fighting for.
Now its not the time to change the past. Evrybody had chancers to finish this war without WAR. But majority of the country and majority of the terrorists selected the war as the only soulution. And after a huge amount of effort, money and lifes the war ended.
Now its time to think of a country that all the people can live with peace and harmoney. Now everybody knows what are the things that drive the country for a war. And its good take the lessons out of them, and build a new country, where all the ethnic groups can live.
Thats my wish.
Tuesday, April 14, 2009
Domain Extension Meanings
Wednesday, April 08, 2009
Add Authentication for your Tomcat Web Application (Using Tomcat Security Realms )
1. get root access and get into the tomcat folder.
2. Open
conf/server.xml
and uncomment the following line.<Realm className="org.apache.catalina.realm.MemoryRealm" /> package com.infosys.hanumant.rome;
3. Open
webapps/your_tomcat_application/WEB-INF/web.xml
and add the following security constraint:<security-constraint> <web-resource-collection> <web-resource-name> Any_Name_That_You_Wish </web-resource-name> <url-pattern> /* </url-pattern> </web-resource-collection> <auth-constraint> <role-name> name_of_the_role_which_has_access </role-name> </auth-constraint> </security-constraint> <login-config> <auth-method>BASIC</auth-method> <realm-name> Any_Name_That_You_Wish </realm-name> </login-config>
here you have to use the same "web-resource-name" and the "realm-name".
4. Open conf/tomcat-users.xml and add the following <user> sub-element:
<user name="anyUserName" password="anyPassword" roles="name_of_the_role_which_has_access">
remember that the role which we use here in this tomcat-users.xml and the one which we used in the step 3 should be same. And here we dont need to creat a role differently. Just adding the above line will be enough.
5. Now its time to restart tomcat server.
Enjoy
Easy way to write XML (or HTML) Tags on your blog
So i found a link where you can convert you code easily to the code that should be written.
http://francois.schnell.free.fr/tools/BloggerPaste/BloggerPaste.html
If you really feel thats the wrong way still you can waste time on typing all the charactors as well.
Enjoy
Friday, March 27, 2009
Never let you computers on public IPs with stupid passwords
Remember to put a very long and secured password for a any computer or a server which is publicly opened :).
Thursday, March 12, 2009
Adding a Row Dynamically to a HTML Table using JavaScript
var tbl = document.getElementById('table_id'); var lastRow = tbl.rows.length; // this adds the row to the end of the table var row = tbl.insertRow(lastRow); var cell1 = row.insertCell(0); var textNode = document.createTextNode("Hello World"); cell1.appendChild(textNode);by creating set of cells you can append to the row which you have created.
Thursday, February 19, 2009
Watch TV and Listen Radio from Web (Sri Lanken)
==========TV=============
http://www.webvahini.com/
=========================
SL - LOCAL
Swarnavahini-1
Swarnavahini-2
Rupavahini
Derana-1
Derana-2/Citi Hits
SL - WEB / SATELLITE
Damlak TV
WORLD - NEWS
BBC Headlines
BBC World Live
Reuters
CNN
CNN IBN (India)
AlJazeera
NBC
NDTV
SKY News
Press TV
WORLD - MUSICMTV India
9 X Music
Classic FM TV
SONY Music
EMusic
Ministry of Sound
Rock 1990s
Rock 1980s
KISS TV
FLY Music
Invisible TV
WORLD - MOVIES
Reel Good
FOX Movies
HBO Hits
STAR Plus
Sci Fi Channel
WORLD - SUBJECT SPECIFIED
National Geographic
Research Channel
Magician TV
NASA 1 (Science)
NASA 2 (Science)
Globe Trekker (Travel)
ESPN Sport
College Humor
FTV (fashion)
=========RADIO===============
http://www.webviduliya.co.cc/
=============================
SL LOCAL - SINHALA
Sirasa FM
Hiru FM
Y FM
Siyatha Radio
Neth FM
Ridham FM
Lakhanda
Swadeshiya Sewaya
City FM
Welanda Sewaya
Lak FM
Rangiri Sri Lanka
BBC Sandeshaya
SL WEB RADIO
Miyurusara
SinduLanka
Nonstop
DJ Remix
Classical
Gagana
Vinsanda
Minsara
C Radio
Daham Radio
J 9 Radio
Dehena
Kirula
Syberviduliya
Nilwala
Three Sinhala
SL LOCAL - ENGLISH
Real FM
Yes FM
TNL Rocks Radio
Lite FM
SL LOCAL - TAMIL
Shakthi FM
Thendral Radio
Tamil National
WORLD BEST
BBC World Service
Voice of America (VOA)
Radio Australia (ABC)
Bollywood Music