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Full Discussion: can I use tomcat server for my chatting application?
Special Forums IP Networking can I use tomcat server for my chatting application? Post 302280164 by cbkihong on Monday 26th of January 2009 08:16:56 AM
Old 01-26-2009
It depends on how you want users to chat. Implementing a (1) 100% Web-based chatroom (no applet), or (2) users use applet from a Web page to chat? Or (3) users have dedicated clients (e.g. swing GUI) for chat?

I hope this is not college assignment. We don't allow posting these kind of questions here. But I will not post any code anyway as they are not something you can do with just a few lines of code and you should try to explore on your own.

(3) The GUI client can support any client-server socket protocol so this is the most traditional way to do this
(2) An applet can have limited networking capability so you can mostly use your own protocol as in case (3)
(1) Without applet, immediate refresh of message on Web page may be triggered by AJAX. You can use Tomcat (or even application server such as JBoss) to host an application server with state managed on it. However, to avoid excessive AJAX polling, you can use Jetty instead of Tomcat, that supports "continuations" so that it can push update to client instead of requiring polling from client side. Actually, the Jetty distribution has an example that exactly demonstrates how to create a chatroom using this method.
 

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LEARN ABOUT DEBIAN

system-config-printer-applet

SYSTEM-CONFIG-PRIN(1)						     Man pages						     SYSTEM-CONFIG-PRIN(1)

NAME

       system-config-printer-applet - print job manager

SYNOPSIS

       system-config-printer-applet [--help] [--version] [--debug]

DESCRIPTION

       system-config-printer-applet is a print job manager for CUPS. Normally it will display a printer icon in the notification area, greyed out
       when there are no print jobs for the current user. Clicking on the icon displays a simple print job manager for cancelling or reprinting
       jobs.

       To save memory, the applet waits first of all until the user has printed a job before putting the icon in the notification area. To invoke
       the print job manager before a job has been printed, run the applet with the --no-tray-icon option: a desktop file is provided for this, so
       that it should appear in the system menu.

       As well as displaying a printer icon in the notification area, the applet also provides a D-BUS server for the
       com.redhat.PrintDriverSelection interface, to help configure a new printer when it is plugged in.

OPTIONS

       --help
	   Display a short usage message.

       --version
	   Display the version of the applet.

       --debug
	   Show debugging information.

AUTHOR

       Tim Waugh <twaugh@redhat.com>
	   Author.

system-config-printer						    24 Nov 2010 					     SYSTEM-CONFIG-PRIN(1)
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