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HOW TO : Configure JBoss to follow symbolic links

Jboss, in addition to being an application server also serves static content. We recently ran into an issue where some static content was not displayed when users hit the link. The JBoss server kept spewing 404 errors, stating that the content was not found. On some hair pulling research, we figured out that JBoss, like Apache, does not follow/allow content mapped to a symbolic link.

So for example in your web app, you added a sym link to another directory, where most of your content is stored, Jboss would not show the content, when you go to the link.

Here’s a quick guide to fix this.

  1. Go to the deploy folder of the context you want to configure. For example, if you used the default context, you go to $JBOSS_HOME/server/default/deploy/jboss-web.deployer
  2. Edit the context.xml file and add allowLinking=”true” in the Context (NOTE : This allows Jboss to publish symbolic links on all apps in your application server, if you want to restrict it to just one particular app, you have to edit the context.xml in your specific application folder). Upon adding the option, our context.xml file looked as such



   

   
   org.jboss.web.tomcat.security.RunAsListener

More information on options for the context.xml can be found here

http://www.jboss.org/file-access/default/members/jbossweb/freezone/docs/2.1.0/config/context.html

For the record, Jboss configuration and accompanying documentation is what I call black magic :).. Too many options, too many ways to do the same thing.

July 25, 2008 by HOWTO Linux Programming Technology Uncategorized Web 3

$1550 more to go!!

I raised $250 out of the $1800 I pledged for Asha, without sending a single e-mail or making a single phone call!! By just adding a signature in my e-mail with the link to my 2008 marathon training.

Thx Sis, Hafsa and Sudheer anna.. Thx for supporting the cause of educating poor kids guys.

July 24, 2008 by Family Fun Rantings Uncategorized 0

HOW TO : Disable annoying message in e-mail by AVG anti-virus

If you are using the free version of AVG Anti-virus by AVG Technologies (Formerly GRISoft), you might have noticed an annoying message that the software inserts in all the e-mails it checks.. The message looks like this

No virus found in this incoming message.

Checked by AVG – http://www.avg.com

Version: 8.0.138 / Virus Database: 270.5.4/1567 – Release Date: 7/22/2008 4:05 PM

I really appreciate the free service that AVG provides for home users, but I don’t want to be reminded or advertise to the world regd the anti-virus I use in every e-mail.

You can disable this message by doing the following in AVG 8.0

  • Open the AVG control panel
  • Click on Tools -> Advanced Settings in the file menu
  • Highlight the “E-mail Scanner” selection in the left hand pane and uncheck the “Certify e-mail” option for both the incoming and outgoing e-mail. Here’s a screen shot.

July 23, 2008 by HOWTO Technology Uncategorized Windows 0

Week 6 training and improved charts with Google Charts

Week 6 of the Chicago marathon training and I was again not able to keep up with my mid week runs. Although I did manage to improve the charts displaying the training program :).. I added a new column to compare my actual milege to the recommended milege.

Here are the parameters I used

cht=bvg
chs=400×250
chtt=week+6+Training
chdl=Recommended+Miles|Actual+Miles
chco=ff0000,00ff00
chxt=x,y
chxr=1,0,15
chxl=0:|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
chd=t:0,3,4,3,0,7,0|0,2,0,3,0,0,7
chbh=10

July 17, 2008 by Programming Running Technology Uncategorized Web 0

Tracking my runs using Google charts

I wrote a brief blurb, when Google came out with their Google Charts API. The API essentially allows you to represent your data visually by just generating a URL.. I have been wanting to use this in real life for quite some time now and think I finally found a need :). I am going to be tracking my weekly runs with using this API  moving forward.

Here’s a graphical representation of my runs for Week 5 of my traning for the Chicago marathon

Week 5

As you can see, I have been slacking off on my mid-week runs.

I used the following parameters to generate the graph

Type = cht (vertical bars)

Legend = chtt (Week 5 training)

Axis Values = chxl (Mon, Tue, Wed, Thur, Fri, Sat, Sun)

The URL I used to generate the image is http://chart.apis.google.com/chart?chtt=Week+5+Training&chts=FF0000,20&chdl=Miles&cht=bvs&chxt=x,y&chxl=0:|Mon|Tue|Wed|Thu|Fri|Sat|Sun|&chs=300×150&chd=t:0,0,3,0,0,0,10&chco=4d89f9,c6d9fd&chbh=20

I still need to figure out, how to show the values in the image and play with the ratio of the axis.

You can get all the information you need about this API by visiting this link http://code.google.com/apis/chart/

July 11, 2008 by HOWTO Programming Running Technology Uncategorized Web 3

HOW TO : Select column in Notepad++

Notepad++, is a great open source editor similar to EditPlus and UltraEdit. One of the features that I really appreciated in EditPlus, was the capability to select a column of data. I checked if NotePad++ has a similar feature and found the following hotkey that can be used to do this..

“Alt + Left Mouse Click” puts you in Column Mode Select

For a complete list of hotkeys that can be used with Notepad++, check out this link

http://notepad-plus.sourceforge.net/uk/shortcuts.php

July 8, 2008 by HOWTO Programming Technology Uncategorized 64