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Aravinda's Tech Blog: Getting started with Apache Zookeeper...

http://aravindamadusanka.blogspot.com/2012/01/getting-started-with-apache-zookeeper.html

Tuesday, January 17, 2012. Getting started with Apache Zookeeper. An interesting blog about "Why distributed systems are hard to program" can be found here. Middle-ware is the bridge that connects. Application program and the communication infrastructure for basic message passing and support for reliable channels across different hardware and software platforms etc. Is an effort to develop and maintain an open-source server which enables highly reliable distributed coordination. FreeBSD - development and...

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: Http Session creation and Destroy events...

http://aravindamadusanka.blogspot.com/2014/02/http-session-creation-and-destroy-events.html

Tuesday, February 4, 2014. Http Session creation and Destroy events. Lets look at a sample class 'WebSessionListener' which implements "HttpSessionListener" interface. To receive notification events, the implementation class must be configured, commonly referred as registered in the deployment descriptor (web.xml) of the web application as follows. ComaraTechBlog.sample.listeners.WebSessionListener. HttpSession httpSession = httpSessionEvent.getSession();. If you use Spring Security, application context ...

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: Apache Derby Querying...

http://aravindamadusanka.blogspot.com/2013/07/apache-derby-querying.html

Thursday, July 4, 2013. One of the popular relational databases purely written in Java. Derby supports running in both Embedded as well as client/server models. In the embedded mode derby runs within the JVM and provides only single connection for applications, while supporting multi-threded, multi-connection and multi-user modes. 2 Insert Values into table. FIRST NAME ,. LAST NAME ,. Since REG ID column is set as auto generated, we only have to set other column values as mentioned above. 4 Update a row.

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: February 2014

http://aravindamadusanka.blogspot.com/2014_02_01_archive.html

Tuesday, February 4, 2014. Http Session creation and Destroy events. Lets look at a sample class 'WebSessionListener' which implements "HttpSessionListener" interface. To receive notification events, the implementation class must be configured, commonly referred as registered in the deployment descriptor (web.xml) of the web application as follows. ComaraTechBlog.sample.listeners.WebSessionListener. HttpSession httpSession = httpSessionEvent.getSession();. If you use Spring Security, application context ...

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: October 2012

http://aravindamadusanka.blogspot.com/2012_10_01_archive.html

Tuesday, October 9, 2012. For Better web experience - Full Screen API. Some web applications may require to hide the title bar and the address bar of the browser and show it as a desktop application in full screen view, so that users get the best experience in viewing. Conventional way of doing this is to open a new window using the "window.open" method as follows. Pretty simple java script code as shown below can be used for enabling full screen in a full web page or in a single element such as in a ima...

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: For Better web experience - Full Screen API

http://aravindamadusanka.blogspot.com/2012/10/for-better-web-experience-full-screen.html

Tuesday, October 9, 2012. For Better web experience - Full Screen API. Some web applications may require to hide the title bar and the address bar of the browser and show it as a desktop application in full screen view, so that users get the best experience in viewing. Conventional way of doing this is to open a new window using the "window.open" method as follows. Pretty simple java script code as shown below can be used for enabling full screen in a full web page or in a single element such as in a ima...

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: July 2013

http://aravindamadusanka.blogspot.com/2013_07_01_archive.html

Thursday, July 4, 2013. One of the popular relational databases purely written in Java. Derby supports running in both Embedded as well as client/server models. In the embedded mode derby runs within the JVM and provides only single connection for applications, while supporting multi-threded, multi-connection and multi-user modes. 2 Insert Values into table. FIRST NAME ,. LAST NAME ,. Since REG ID column is set as auto generated, we only have to set other column values as mentioned above. 4 Update a row.

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: Projects

http://aravindamadusanka.blogspot.com/p/projects.html

Highly scalable high performance clustering implementation for Apache Axis2". Pokura.googlecode.com/svn/trunk/ pokura-read-only. Dr Shahani Markus Weerawarana,. Department of Computer Science and Engineering,. Director of Architect WSO2). Email : azeez@wso2.com. H P M Tissera. D C S Weerasinghe. Subscribe to: Posts (Atom). Fullstack Engineer at Visa Inc,Singapore. View my complete profile. Dive into Oracle : Data Grouping and Merging. Travel Notes - සංචාරක සටහන්. Third Eye - තෙවන ඇස.

aravindamadusanka.blogspot.com

Aravinda's Tech Blog: August 2014

http://aravindamadusanka.blogspot.com/2014_08_01_archive.html

Sunday, August 31, 2014. Dive into Oracle : Data Grouping and Merging. Let's create a simple database structure as follows. We can use a tool like SQL Fiddle. To run queries and see how it works. Make sure you have selected Oracle 11g R2 as DB type before running any queries. CREATE TABLE SEMISTER GPA( STUDENT ID VARCHAR2(8), SEMISTER ID VARCHAR2(4), GPA NUMBER(5,4), PRIMARY KEY (STUDENT ID,SEMISTER ID) );. Adding some values to above tables. See in SQL Fiddle. 02 DENSE RANK()and PARTITION BY. SELECT DT&...

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Aravinda's Tech Blog: August 2012

http://aravindamadusanka.blogspot.com/2012_08_01_archive.html

Friday, August 17, 2012. How to Use Apache JMeter for Web Services Testing. Recently, we were able to do some clustering related load testing on Apache Axis2. Web services engine focusing on state replication property. I thought of sharing things we did in our tests which were carried out using Apache JMeter. Here are some advantages of using JMeter. Open Source free tool developed by Apache Software Foundation. Has an active community, good documentation. API and plug-ins available for customization.