RichFaces File Upload Tutorial

Rich Faces consists of some really useful components that can be used to make as they say  some very "rich web applications". In this tutorial i will be explaining about how to use richfaces file upload component to store a file into the database and then retrieve the file using a Jersey restful web service. The file upload component of rich faces supports two modes of uploading. To store the uploaded file in a temporary directory or To keep an in memory representation of it. I will be explaining about how to use the latter one the reason...

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Installing mod_ssl on apache: X.509,Certificate Authority,digital signatures explained

If you want to secure connection to a resource on your apache web-server by using public key encryption technique then you can add the mod_ssl module into the apache web-server for that purpose. Here are the list of things that are explained in this tutorial:- Installing OpenSSL Public key encryption standard. Certificate Signing Authority(CA) and...

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Java Shutdown Utility V0.2

In case you want to schedule or automate tasks like shutting down, restarting, hibernating , Standby and Locking then you can use this simple application made by me. It utilizes the psshutdown application and has a automated counter for planning the aforementioned tasks. Installation:- Just extract the rar file and after you extract there will be...

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Cross Domain Ajax Requests

Browser's have same origin policy for ajax requests which means you cannot make a cross domain ajax request. To overcome this barrier the following methods may be used. Use JSONP Make a service proxy Use dynamic script element In this post i will be explaining  about how to use JSONP . I will be writing a simple script in dojo that will communicate with twitter api and return user's latest tweet's. The dojo.io.script method works by sending name of the callback method along with the asynchronous request and on completion of the request...

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Resolving GUI display problems in Linux (Ubuntu, Red Hat etc)

The display problems in linux occur mostly due to misconfiguration of X-server config file (xorg.conf) this may happen when you install or update graphics driver for your display card or due to various other reasons. So to troubleshoot GUI display problem just follow these steps: Login as root At the shell prompt navigate to /etc/X11 directory (cd /etc/X11) Copy the failsafe configuration file to original file "cp xorg.conf.failsafe xorg.conf" Start the x-server "startx" The aforementioned steps should resolve the display problems :-)...

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Kmix not working on kde

You might encounter a problem that when you start the kmix sound mixer you would not see any thing happening. It happens because it runs as an hidden application, so to access it you would need to add the system tray widget. To add the system tray widget to your panel perform the following steps:- 1. Right click on the panel that you want to add...

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