Manoj's Tech Blog

Type in sinhala

2010-05-06T20:26:00.001-07:00

http://www.google.com/transliterate/Sinhalese

Java line of code

2010-03-31T00:13:00.001-07:00

This is a handy tool for count the java line of code.
http://cloc.sourceforge.net/

firefox2

2009-12-29T02:03:00.001-08:00

http://willbryant.net/software/2008/05/26/selenium_rc_firefox_2_on_ubuntu_hardy

Java heap error

2009-10-28T23:41:00.000-07:00

Set
export MAVEN_OPTS="-Xms512m -Xmx2048m"
to skip the java heap space error when building the code.

Office communicator in Ubuntu

2009-10-05T00:02:00.001-07:00

https://mknowles.com.au/wordpress/index.php/2009/07/10/pidgin-and-microsoft-office-communicator-in-ubuntu

http://ubuntuforums.org/showthread.php?t=1046158

Firefinder for Firebug 0.91

2009-08-26T01:58:00.001-07:00

Firefinder for Firebug 0.91 finds HTML elements matching chosen CSS selector(s) or XPath expression.

EPEL

2009-08-03T22:36:00.001-07:00

to add new packages for yum:
http://www.cyberciti.biz/faq/rhel-fedora-centos-linux-enable-epel-repo/

Download subversion

2009-07-30T20:39:00.000-07:00

http://svnbinaries.open.collab.net/servlets/ProjectDocumentList?folderID=227
http://downloads-guests.open.collab.net/servlets/ProjectDocumentList?folderID=6

Install guide to Xvfb

2009-07-10T01:13:00.001-07:00

http://testdrive.mapinfo.com/techsupp/miprod.nsf/kbase_by_product/A832A07452B9A0E385256F8000760F68

Free ebook download

2009-07-09T02:53:00.000-07:00

http://www.flazx.com/

Jmeter

2009-04-20T22:49:00.000-07:00

Apache JMeter is a 100% pure Java desktop application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.
Apache JMeter may be used to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). It can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types. You can use it to make a graphical analysis of performance or to test your server/script/object behavior under heavy concurrent load.
I used Jmeter for performance testing.

Create new module in project

2009-03-26T02:09:00.000-07:00

(1) create relevant folder within project folder
plugins\keywordparameters\src\main\java
(2) create pom file and set artifact if,parent etc
(3) add module name to root pom
(4) svn add keywordparameters
(5) build the project
(6) mvn idea:idea
(7) in IDEA, right click module -> module settings-> select the module and right click and New-> Spring
(8) build the project
(9) mvn idea:idea
(10) create com.fastsearch.admomentum.plugins.keywordparameters.feature package using idea

The Top 50 Proprietary Programs and their Open Source Alternatives

2009-02-11T14:49:00.000-08:00

http://whdb.com/2008/the-top-50-proprietary-programs-that-drive-you-crazy-and-their-open-source-alternatives/

List of Linux distributions

2009-02-04T15:54:00.000-08:00

We are using Ubuntu as OS. Now in melborrn servers, we use CentOS.
Debian (Ubuntu) / Fedora (CentOS)
They belongs to different distributions.
Useful link:
http://en.wikipedia.org/wiki/List_of_Linux_distributions#RPM-based

To find, which linux distribution we use:
cat /etc/*release
or
cat /proc/version
or
uname -a
or
cat /etc/*version

http://www.linuxquestions.org/questions/linux-general-1/how-to-get-os-name-from-command-line-557339/

There are some differences in those distributions.
In Debian, we use app-get and In CentOS, we use yum.

JSON

2009-02-03T19:08:00.000-08:00

JSON (JavaScript Object Notation) is a lightweight data-interchange format.

http://json.org/

XSS

2009-02-03T18:09:00.000-08:00

To prevent XSS, Input validation and output encoding can be done by using SafeHtml (php)and Anti-XSS (ASP )libraries.

Windows shortcuts

2009-02-03T18:08:00.001-08:00

This is a useful link:
http://support.microsoft.com/kb/126449

Create samba shared folder

2009-02-01T19:25:00.000-08:00

sudo vim /etc/samba/smb.conf
give
[admo]
path = /home/manoj
public = yes
writable = yes
and save
sudo smbpasswd -a manoj
sudo service smb restart
Then, mycomputer->map netwok drive-> //mel1u111/manoj

TortoiseSVN

2009-01-29T22:45:00.001-08:00

TortoiseSVN is a easy to use Revision control / version control / source control software for Windows. Since it's not an integration for a specific IDE we can use it with whatever development tools you like. After install it, "SVN update", "SVN commit", "SVN checkout", "TortoiseSVN" ... options come to right click. We just need to right click on the folder and do the relevent thing.

Putty

2009-01-29T22:35:00.000-08:00

PuTTY is a terminal emulator application which can act as a client for the SSH, Telnet, rlogin, and raw TCP computing protocols. I use putty to connect and get a terminal to linux machine from windows machine (using ssh).
http://en.wikipedia.org/wiki/PuTTY

winSCP

2009-01-29T22:18:00.000-08:00

Using WinSCP , files can be sent to linux machines. Its a free SFTP, FTP and SCP client for Windows
http://winscp.net/eng/index.php

Doxygen and NDoc

2009-01-29T22:10:00.000-08:00

I needed to generate documentation like javaDoc for C#. It can be done by NDoc. But since i used comments like java, Doxygen was very useful.
http://www.stack.nl/~dimitri/doxygen/

Not only C#, it can be used to generate documents for C++, C, Java, Objective-C, Python, IDL (Corba and Microsoft flavors), Fortran, VHDL, PHP, C#, and to some extent D.

useful links:
http://www.stack.nl/~dimitri/doxygen/download.html#latestsrc
http://www.thunderguy.com/semicolon/2006/08/06/c-sharp-documentation-comments-useless/
http://www.programminglearn.com/320/c-commenting-c-vsnet-commenting

DropBox

2009-01-22T01:18:00.000-08:00

This is good web interface for file sharing.

InteliJ IDEA plugins

2009-01-22T00:52:00.000-08:00

Spell Checker & Charac Inspector are two useful plugings.

Java Util Calendar

2009-01-01T21:46:00.000-08:00

This is the way to month\date\year from the calender.
ad.getCreated().get(Calendar.MONTH);
ad.getCreated() returns a java util calendar type object.

DbVisualizer

2008-12-19T02:57:00.000-08:00

DbVisualizer is a database tool for developers and database administrators, helping you with both the development and maintenance of your databases.

It is the perfect solution since the same tool can be used on all major operating systems accessing a wide range of databases.

http://www.minq.se/products/dbvis/download/install.jsp

Firefox Add-ons - Web Developer

2008-12-18T19:34:00.000-08:00

Web Developer is the number one add-on for Firefox. It’s an essential for web developers and has a huge array of tools for making web development easier. We use it the most for on-the-fly validation of CSS and HTML as well as inspecting HTML and CSS.

https://addons.mozilla.org/en-US/firefox/addon/60

Wine

2008-12-16T20:21:00.000-08:00

To get help about wine:

https://help.ubuntu.com/community/Wine

Creating simple web project using maven

2008-11-25T02:10:00.001-08:00

we can use mvn archetype:generate command to generate java web appication using maven. Afterthat,
cd testweb
mvn idea:idea

useful link:
http://books.sonatype.com/maven-book/reference/web.html

JSF (JavaServer Faces)

2008-11-14T00:24:00.000-08:00

JavaServer Faces technology simplifies building user interfaces for JavaServer applications.
JavaServer Faces technology includes:

* A set of APIs for representing UI components and managing their state, handling events and input validation, defining page navigation, and supporting internationalization and accessibility.
* A JavaServer Pages (JSP) custom tag library for expressing a JavaServer Faces interface within a JSP page.

Links:
http://java.sun.com/javaee/javaserverfaces/overview.html
http://en.wikipedia.org/wiki/JavaServer_Faces

log4j

2008-11-14T00:21:00.000-08:00

This is the way of using log4j in java.

import org.apache.log4j.Logger;

private static Logger log = Logger.getLogger(ExternalAdvertiserAccountAssembler.class);

if (log.isDebugEnabled()) {
log.debug("User [id:"+ currentUser.getId() + "] is authorized to set the Trusted state.");
}

Links:
http://logging.apache.org/log4j/1.2/index.html

Reformat and Optimise code in IDEA

2008-10-22T03:05:00.000-07:00

These are the shortcuts to reformat and optimize the code.

Alt+Ctrl+L / Alt+Ctrl+O

hessian binary web service protocol

2008-10-12T21:46:00.000-07:00

The Hessian binary web service protocol makes web services usable without requiring a large framework, and without learning yet another alphabet soup of protocols. Because it is a binary protocol, it is well-suited to sending binary data without any need to extend the protocol with attachments.
http://hessian.caucho.com/#Java

In our project i needed to write a test client in C# to use Exposed java API methods.For that I used HessianC#. I added hessiancsharp.dll to the .NET project.
http://www.hessiancsharp.org/

in Java , its like this.
bean id="advertisementService" class="org.springframework.remoting.caucho.HessianProxyFactoryBean"
description Proxy for the user service using HTTP. /description
property name="serviceUrl" value="${admanager.url}remoting/secured/advertisementService"/
property name="serviceInterface" value="com.fastsearch.admomentum.admanager.advertisement.client.ExposedAdvertisementService"/
property name="serializerFactory" ref="hessianSerializer"/
property name="username" value="advertiser@test.com"/
property name="password" value="password"/
/bean

XSLT

2008-10-02T22:01:00.000-07:00

XSL stands for EXtensible Stylesheet Language. The World Wide Web Consortium (W3C) started to develop XSL because there was a need for an XML-based style sheet language. XSLT stands for XSL Transformations. We can use XSLT to transform XML documents into other formats, like XHTML.
http://www.w3schools.com/xsl/default.asp
In my project i used it to transform xml document to csv file.
TransformBillingXmlToCsv.xml

xsl:template name="amount"
xsl:text " /xsl:text
xsl:value-of select="currencySymbol"/
xsl:text /xsl:text
xsl:choose
xsl:when test="currencySymbol = 'JPY'"
xsl:value-of select='format-number(value, "#.")'/
/xsl:when
xsl:otherwise
xsl:value-of select='format-number(value, "#.00")'/
/xsl:otherwise
/xsl:choose
xsl:text " /xsl:text
/xsl:template

(tag characters are removed from above sample code)
Here i had to use XSLT format-number() Function and XSLT Element.

http://www.w3schools.com/XSL/func_formatnumber.asp
http://www.w3schools.com/xsl/el_when.asp

Credit card numbers

2008-09-26T01:25:00.001-07:00

I had to work with wrong credit numbers but valid numbers for testing purpose. These are two links which was useful for me.

http://www.darkcoding.net/credit-card-numbers/
http://www.auricsystems.com/support-center/sample-credit-card-numbers

Joda Time

2008-09-26T01:21:00.000-07:00

Joda-Time provides a quality replacement for the Java date and time classes. The design allows for multiple calendar systems, while still providing a simple API. The 'default' calendar is the ISO8601 standard which is used by XML. The Gregorian, Julian, Buddhist, Coptic, Ethiopic and Islamic systems are also included, and are welcomed further additions. Supporting classes include time zone, duration, format and parsing.

http://joda-time.sourceforge.net/
http://apidoc.org/docset/62
http://apidoc.org/view/35865

Common Era (also known as Christian Era and Current Era; abbreviated CE)is a designation for the period of time beginning with year 1 of the proleptic Gregorian calendar.

http://en.wikipedia.org/wiki/BCE

Speed up the cargo start

2008-09-22T04:24:00.000-07:00

To speed up the cargo start, I added these text to setenv.sh ,source it and put apache-tomcat-5.5.25.zip file to relevant path mentioned here.

export MAVEN_OPTS="-Djava.net.preferIPv4Stack=true -Djava.rmi.server.ignoreStubClasses=true -Dtomcat.installer.url=file:///home/chanaka/admo/bin-3.x/apache-tomcat-5.5.25.zip -Dtomcat.alternate.installer.url=file:///home/chanaka/admo/bin-3.x/apache-tomcat-5.5.25.zip $ADMO_OPTS"

Remotely debug your app in Eclipse or Idea

2008-09-18T03:30:00.000-07:00

When i needed to debug the app remotely, i needed to put
-Xdebug -Xrunjdwp:transport=dt_socket,address=5005,server=y,suspend=y
in cargo.jvmArguments -Xmx512M -XX:MaxPermSize=128m -Xdebug -Xrunjdwp:transport=dt_socket,address=5005,server=y,suspend=y /cargo.jvmArguments
line in pom.xml. (I'm using InteliJIdea).

useful links:
http://raibledesigns.com/rd/entry/remotely_debug_your_app_in
http://java.sun.com/j2se/1.4.2/docs/guide/jpda/conninv.html
http://lists.nuxeo.com/pipermail/ecm-checkins/2006-December/002644.html

JSTL

2008-09-14T23:18:00.001-07:00

I had to format a date to dispaly in the jsp page. For that, i used JSTL. The JavaServer Pages Standard Tag Library (JSTL) encapsulates as simple tags the core functionality common to many Web applications. JSTL has support for common, structural tasks such as iteration and conditionals, tags for manipulating XML documents, internationalization tags, and SQL tags. It also provides a framework for integrating existing custom tags with JSTL tags.

http://java.sun.com/products/jsp/jstl/

I used JSTL Format Library — Tag. This tag has pattern attribute.

http://download-west.oracle.com/otn_hosted_doc/jdeveloper/905/working_with_html_pages/f1_html_xsql_jsp/f1_jspfmtformatdate.html

For that patten, we can give the pattern we need.

http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html

eg:
fmt:formatDate timeZone="${definedTimeZone}" value="${value}" pattern="EEE MMM dd HH:mm:ss z yyyy"

Skip execution of method in specific time of day

2008-08-22T03:29:00.000-07:00

/* this test fails if the current time is between 12:00am and 3:00am*/

Calendar now = Calendar.getInstance();
int hour = now.get(Calendar.HOUR_OF_DAY);
String timeCheck = "Current time not between 12:00am and 3:00am";
String timeDescription = "Current time" + ((hour < 3) ? "" : " not") + " between 12:00am and 3:00am";
Assume.assumeThat(timeDescription, equalTo(timeCheck));

Assume is package org.junit;(public class Assume )

ANTLR

2008-08-21T04:31:00.000-07:00

Today i worked with some text character parsing. In our project, they have used ANTLR parser. ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from grammatical descriptions containing actions in a variety of target languages. ANTLR provides excellent support for tree construction, tree walking, translation, error recovery, and error reporting.

http://www.antlr.org/

We have used both Class LLkParser and Class Parser.Alos one important interface that provides is Interface AST in antlr.collections.

http://www.antlr2.org/javadoc/antlr/LLkParser.html
http://www.antlr2.org/javadoc/antlr/Parser.html#LA(int)
http://www.antlr2.org/javadoc/antlr/collections/AST.html

Payment gateway

2008-08-14T23:29:00.000-07:00

A payment gateway is an e-commerce application service provider service that authorizes payments for e-businesses, online retailers, bricks and clicks, or traditional brick and mortar. Paypal and SecurePay are two common payment gateways. Following are the list of gateways.

http://www.paymentgatewaydirectory.com/

In our project we use saferpay payment gateway. In billing-services.xml,
< bean id="billing.paymentService"
class="com.fastsearch.admomentum.billing.service.DefaultPaymentService">
. . .
< !-- this bean is defined in fast-admomentum-paymentgateway.jar -->
< property name="paymentGateway" ref="saferpayPaymentGateway" />
. . .
< /bean>

and in base-configuration.properties, there are lots of configurations.
one of them are,

# The merchant account id with Saferpay
com.fastsearch.admomentum.paymentgateway.saferpay.accountId=XXXXX-XXXXXXXXX

Java Unit testing

2008-08-13T23:35:00.000-07:00

This is a simple test class i wrote to test following method.

package com.fastsearch.admomentum.common.time;

import java.io.Serializable;
import java.util.Calendar;
........

public class DateRange implements Serializable {

.....

public boolean isBetween(Calendar date) {
if (getEnd() != null) {
return (date.after(getStart()) && date.before(getEnd()))
|| date.equals(getStart()) || date.equals(getEnd());
} else {
return date.after(getStart()) || date.equals(getStart());
}
}
}

----------------------------------------------

package com.fastsearch.admomentum.common.time;

import junit.framework.TestCase;
import java.util.Calendar;

public class DateRangeUnitTest extends TestCase {

private DateRange dateRange;

public void testIsBetween()
{
assertFalse(isBetweenOutOfBoundTest());
}

private boolean isBetweenOutOfBoundTest()
{
Calendar testDate = Calendar.getInstance();
testDate.clear();
testDate.set(Calendar.YEAR,2007);
testDate.set(Calendar.MONTH,4);
testDate.set(Calendar.DATE,1);

Calendar startDate = Calendar.getInstance();
startDate.clear();
startDate.set(Calendar.YEAR,2007);
startDate.set(Calendar.MONTH,5);
startDate.set(Calendar.DATE,1);

Calendar endDate = Calendar.getInstance();
endDate.clear();
endDate.set(Calendar.YEAR,2007);
endDate.set(Calendar.MONTH,7);
endDate.set(Calendar.DATE,1);

dateRange = new DateRange(startDate, endDate);
return dateRange.isBetween(testDate);
}
}

mvn commands

2008-08-13T04:49:00.001-07:00

- clean
mvn clean

- build
mvn install

- skip all the test
mvn install -P test-unit -Dmaven.test.skip=true
mvn install -o -P test-unit -Dmaven.test.skip=true

- run all the tests including selenium tests
mvn -Ptest-all install

- run specific tests (unit test or selenium test)
mvn install -Ptest-all -Dtest=com.fastsearch.admomentum..ClassName
mvn install -P test-all -Dtest=AdvertisementSeleniumTest
mvn install -Dtest=com.fastsearch.admomentum.common.time.DateRangeUnitTest -o -Ptest-all

- run specific tests (unit test or selenium test) with degugging
mvn install -Dtest=com.fastsearch.admomentum.admanager.webapp.selenium.campaign.CampaignSeleniumTest -o -Dmaven.surefire.debug -Ptest-all
mvn install -Dtest=com.fastsearch.admomentum.admanager.reporting.DefaultReportingServiceUnitTest -o -Dmaven.surefire.debug -Ptest-all

Cargo

2008-08-12T23:03:00.000-07:00

Cargo is a thin wrapper around existing containers (e.g. J2EE containers). It provides different APIs to easily manipulate containers.

Cargo provides the following APIs:

* A Java API to start/stop/configure Java Containers and deploy modules into them. Also Ant tasks, Maven 1, Maven 2 plugins. Intellij IDEA and Netbeans plugins are offered.
* A Java API to parse/create/merge J2EE Modules

Following are some containers.

* Geronimo 1.x
* JBoss 3.x
* JBoss 4.x
* Jetty 4.x
* Jetty 5.x
* Jetty 6.x
* jo 1.x
* Oc4J 9.x
* Orion 1.x
* Orion 2.x
* Resin 2.x
* Resin 3.x
* Tomcat 3.x
* Tomcat 4.x
* Tomcat 5.x
* WebLogic 8.x

Difference between 'vi' and 'vim' editors

2008-08-12T03:01:00.000-07:00

vim is 'vi improved'
More powerful, etc

http://www.dc.turkuamk.fi/docs/soft/vim/vim_diff.html

Job scheduling with Quartz

2008-08-07T23:15:00.000-07:00

Quartz is an open source job scheduling framework that provides simple but powerful mechanisms for job scheduling in Java applications. Quartz allows developers to schedule jobs by time interval or by time of day. The two fundamental units of Quartz's scheduling package are jobs and triggers. A job is an executable task that can be scheduled, while a trigger provides a schedule for a job.
Also, any singular job can have many triggers associated with it.

A CronTrigger allows for more specific scheduling than a SimpleTrigger and is still not very complex. Based on cron expressions, CronTriggers allow for calendar-like repeat intervals rather than uniform repeat intervals -- a major improvement over SimpleTriggers.
A "Cron-Expression" is a string comprised of 6 or 7 fields separated by white space. There are 6 mandatory and 1 optional fields.

Field Name
Seconds
Minutes
Hours
Day-of-month
Month
Day-of-Week
Year (Optional)

Expression Meaning
"0 0 12 * * ?" Fire at 12pm (noon) every day

useful links:
http://www-128.ibm.com/developerworks/java/library/j-quartz/

http://quartz.sourceforge.net/javadoc/org/quartz/CronTrigger.html

Daylight saving time

2008-08-05T20:50:00.001-07:00

Daylight saving time (DST; also summer time in British English; see Terminology) is the convention of advancing clocks so that afternoons have more daylight and mornings have less. Typically clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.

http://en.wikipedia.org/wiki/Daylight_saving_time

In Java, there are two ways to create days. One method is using Calender object.

Calendar c = Calendar.getInstance();
c.clear();
c.set(Calendar.YEAR,2007);
c.set(Calendar.MONTH,9);
c.set(Calendar.DATE,31);
System.out.println(c.getTime());
c.add(Calendar.DATE,1);
System.out.println(c.getTime());

private List calculateIntervals(DateRange dateRange) {
Date date = dateRange.getStart().getTime();
Calendar c = Calendar.getInstance();
c.clear();
c.setTimeZone(dateRange.getStart().getTimeZone());
c.setTime(dateRange.getStart().getTime());
List dates = new ArrayList();
while (c.getTime().compareTo(dateRange.getEnd().getTime()) <= 0) {
dates.add(c.getTime());
Calendar nextDate = (Calendar) c.clone();
nextDate.add(Calendar.DATE,1);
c = nextDate;
}
return dates;
}

This timezone don't work with daylight saving time. The other way is using Date object.

private List calculateIntervals(DateRange dateRange) {
Date date = dateRange.getStart().getTime();
List dates = new ArrayList();
while (date.compareTo(dateRange.getEnd().getTime()) <= 0) {
dates.add(date);
Date nextDate = (Date) date.clone();
nextDate = DateUtils.addDays(nextDate, 1);
date = nextDate;
}
return dates;
}

This Date object time zone cater with daylight-saving time. In date object->cdate->daylightSaving parameter contains the time in milisecond that should add to the date for daylight-saving changes.

Generics

2008-07-30T03:50:00.000-07:00

Generics allow you to abstract over types. The most common examples are container types, such as those in the Collection hierarchy.

When you take an element out of a Collection, you must cast it to the type of element that is stored in the collection. Besides being inconvenient, this is unsafe. The compiler does not check that your cast is the same as the collection's type, so the cast can fail at run time.

Generics provides a way for you to communicate the type of a collection to the compiler, so that it can be checked. Once the compiler knows the element type of the collection, the compiler can check that you have used the collection consistently and can insert the correct casts on values being taken out of the collection.

Here is a simple example taken from the existing Collections tutorial:

// Removes 4-letter words from c. Elements must be strings
static void expurgate(Collection c) {
for (Iterator i = c.iterator(); i.hasNext(); )
if (((String) i.next()).length() == 4)
i.remove();
}

Here is the same example modified to use generics:

// Removes the 4-letter words from c
static void expurgate(Collection c) {
for (Iterator i = c.iterator(); i.hasNext(); )
if (i.next().length() == 4)
i.remove();
}

Firefox Add-ons - Fire bug

2008-07-28T23:56:00.001-07:00

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...
Firebug 1.2 requires Firefox 3. Firefox 2 users should install the older 1.05 version of Firebug.

https://addons.mozilla.org/en-US/firefox/addon/1843

Linux BASH command line

2008-07-24T01:39:00.000-07:00

These are several useful Linux commands.

df ----Display free disk space
gzip ----Compress or decompress named file(s)
history ----Command History
ifconfig ----See the ip address of the machine

This is the url:
http://www.ss64.com/bash/

Selenium IDE

2008-07-23T23:28:00.000-07:00

Selenium is a test tool for web applications. Selenium tests run directly in a browser, just like real users do. It runs in Internet Explorer, Mozilla and Firefox on Windows, Linux, and Macintosh, Safari on the Mac.I tested it in Firefox on Linux.The quickest way to learn Selenium is via a Firefox plugin called Selenium IDE.
http://selenium.openqa.org/

We can download it from
http://selenium-ide.openqa.org/download.jsp
I used Version 0.8.7

This is a good link for learning about selenium.
http://blog.taragana.com/index.php/archive/5-minute-guide-to-selenium-ide-and-selenium-rc-test-tools/

Our project(Admomentum) uses Selenium Remote Control rather than Selenium IDE. The Selenium Remote Control allows you to develop test cases and test suites in Java (supports JUnit & NGUnit), PHP, Ruby, Python, Perl and even .NET. It is the most flexible setup but requires some development knowledge to set up and use.

How To Raise a "File Download" Dialog Box

2008-07-23T20:36:00.000-07:00

When you serve a document from a Web server, you might want to immediately prompt the user to save the file directly to the user's disk, without opening it in the browser. However, for known MIME (Multipurpose Internet Mail Extensions) types such as Microsoft Word ("application/ms-word"), the default behavior is to open the document in Internet Explorer.You can use the content-disposition header to override this default behavior. Its format is:

Content-disposition: attachment; filename=fname.ext

Content-disposition is an extension to the MIME protocol that instructs a MIME user agent on how it should display an attached file.When Internet Explorer receives the header, It raises a File Download dialog box whose file name box is automatically populated with the file name that is specified in the header.

To apply the header dynamically, create an Active Server Pages (ASP) file that writes the document out to the browser. Use the Response.AddHeader method to add the content-disposition header. For example:

Response.AddHeader "content-disposition","attachment; filename=fname.ext"

in Java
response.addHeader(CONTENT_DISPOSITION, conditionalParse(contentDisposition, invocation));

UTF-8 and shift-jis

2008-07-22T21:35:00.000-07:00

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is able to represent any character in the Unicode standard, yet the initial encoding of byte codes and character assignments for UTF-8 is backwards compatible with ASCII. For these reasons, it is steadily becoming the preferred encoding for e-mail, web pages.

Shift JIS is a character encoding for the Japanese language.

This is a sample example of using encoding in Java.

filename = new StringBuilder();
private static final String DEFAULT_CHARSET = "ISO-8859-1";

try {
filename.append(new String(getText("campaign.download.filename.prefix").getBytes("UTF-8"), DEFAULT_CHARSET))
.append("-")
.append(sdf.format(now))
.append("-")
.append(new String(getCampaign().getName().toLowerCase().replace(" ", "-").getBytes("UTF-8"), DEFAULT_CHARSET))
.append(".csv");
} catch (UnsupportedEncodingException e) {
addActionError(getText("error.advertisementCsv.failedToDownload"));
return INPUT;
}

CSS float Property

2008-07-21T21:51:00.000-07:00

The float property allows two div elements to display in same line.The float property sets where an image or a text will appear in another element.Note: If there is too little space on a line for the floating element, it will jump down on the next line, and continue until a line has enough space.

img
{
float: left
}

Remote Access in PostgreSQL databases

2008-07-21T00:54:00.000-07:00

When we need to allow to someone to access our PostgreSQL database in our machine, we need to put following code in our pg_hba.conf file.

# Allow a user from host 192.168.12.10 to connect to database
# "postgres" if the user's password is correctly supplied.
#
# TYPE DATABASE USER CIDR-ADDRESS METHOD
host postgres all 192.168.12.10/32 md5

This is a useful site regarding that.

http://developer.postgresql.org/pgdocs/postgres/auth-pg-hba-conf.html

Remote login in Ubuntu

2008-07-18T02:15:00.000-07:00

When you need to remote login to a another machine, first you need to change the remote desktop preferences of the machine which you need to connect and then run following command withing your machine.

vncviewer 172.23.69.90
or
vncviewer -fullscreen 172.23.69.90

change the ip address as u need. This is remote login with user interface.

The command for remote login in command pront is:
eg:
ssh silsaj@cmb1u119.cmb1.fast.no

md5sum in Linux

2008-07-17T01:17:00.000-07:00

A checksum is a form of redundancy check, a simple way to protect the integrity of data by detecting errors in data that are sent through space (telecommunications) or time (storage). It works by adding up the basic components of a message, typically the assorted bits, and storing the resulting value.
These types of redundancy check are useful in detecting accidental modification such as corruption to stored data or errors in a communication channel. However, they provide no security against a malicious agent as their simple mathematical structure makes them trivial to circumvent. To provide this level of integrity, the use of a cryptographic hash function, such as SHA-256,MD5 is necessary. In cryptography, MD5 (Message-Digest algorithm 5) is a widely used, partially insecure cryptographic hash function with a 128-bit hash value.

md5sum is a computer program that calculates and verifies 128-bit MD5 hashes, as described in RFC 1321. The MD5 hash (or checksum) functions as a compact digital fingerprint of a file. It is extremely unlikely that any two non-identical files existing in the real world will have the same MD5 hash (although as with all such hashing algorithms, in theory there is an unlimited number of files that will have any given MD5 hash).

In Linux, we use following command to check the checksum of a file.
md5sum -b ojdbc14.jar

Regular Expression

2008-07-09T04:55:00.000-07:00

This is a simple java application for using regular expressions in Java.

import java.util.regex.*;

public class Regex {

public static void main(String[] args) throws Exception {

Pattern p = Pattern.compile("[,\\s]+");
String[] result = p.split("one,two, three four , five");
for (int i=0; i System.out.println(result[i]);

String textSubject = "aasasa2323";
Pattern brackets = Pattern.compile(".*\\{[h][e][l][l][o]\\}.*");
Matcher fit = brackets.matcher(textSubject);
if (fit.find()) {
System.out.println ("Found");
} else {
System.out.println ("Not found");
}

}

}

Download accelerator for Ubuntu

2008-07-03T22:45:00.000-07:00

I'm using Ubuntu 7.10 (Gutsy Gibbon) in the working place. This link was useful for me to find details about it.

http://ubuntuguide.org/wiki/Ubuntu:Gutsy

Axel is a lightweight command line download accelerator for ubuntu. This link provides the procedure to use it.

http://blog.codefront.net/2007/04/29/axel-lightweight-command-line-download-accelerator/

Web developer 1.1.6 is an add-on to Firefox which is a very useful tool for web developers. This is the url:
https://addons.mozilla.org/en-US/firefox/addon/60

Today when I'm giving permissions to files and folders, this article was useful for me.
http://www.freeos.com/articles/4440/