Online status board

[Bill Vlahos]

Thanks Jan.

I was wondering if socket communications might be a good way to go on this. In some ways it would be similar to instant messaging.

Having said this I'm still not sure how to get started with this.

Bill

On Nov 18, 2009, at 12:35 AM, Jan Schenkel wrote:

> Well, in the AJAX world, you would write a JavaScript that sends an XmlHttpRequest every couple of seconds, and modifies the existing web page. But we're in a revCentered world here, so let's take the other route :-)
> Along the same lines, you could make a revlet that uses 'get url' and 'post to url' commands in a 'send in time' loop to interact with the server back-end, and update the user interface with the changes. If your server back-end can send the information in XML or JSON format, you can still decide later on to make an AJAX-style front-end.
> 
> Pushing information from the server to the client is more complicated, and requires some form of socket communication. My favourite solution for this problem is putting a message queue (like Apache ActiveMQ) in between the server and clients.
> At the RunRevLive conference, I did a presentation 'revTalk meets Java' where I showed this method in two ways: by calling a small Java class via shell call, or by using the Quartam STOMP Library, a 100% revTalk solution to talk to Java JMS-compatible message queues.
> Quartam STOMP library will come out as soon as I find the time to do another debugging round and finish the documentation. It will be open source, dual-license LGPL / Commercial.
> 
> Jan Schenkel.
> =====
> Quartam Reports & PDF Library for Revolution
> <http://www.quartam.com>
> 
> =====
> "As we grow older, we grow both wiser and more foolish at the same time."  (La Rochefoucauld)
> 
> 
> --- On Tue, 11/17/09, Bill Vlahos <bvlahos at mac.com> wrote:
> 
>> From: Bill Vlahos <bvlahos at mac.com>
>> Subject: Online status board
>> To: "How to use Revolution" <use-revolution at lists.runrev.com>
>> Date: Tuesday, November 17, 2009, 4:20 PM
>> I would like to make a application
>> using the new capabilities in Rev 4 that I am having trouble
>> figuring out. It is for checking out resources so people can
>> see who has the resources checked out.
>> 
>> For example:
>> Room A   * In  O Out  Fred Smith
>> (these would be radio buttons followed by the name of the
>> person who checked it out)
>> Room B   O In  * Out  Available
>> etc.
>> 
>> I'd like the clients to be able to see the status in a web
>> browser. The checking in and out would be set in a server
>> application which people log into. The client web browser
>> would need to be able refresh itself. A screen refresh would
>> work except it is ugly (whole screen clears and redraws) and
>> it wouldn't by dynamic. I'd like to be able to push the
>> updates to it in real time.
>> 
>> It seems like this is a good candidate for the plugin to
>> make the updates smooth but it could also be done using Rev
>> like a PHP server.
>> 
>> I can see how to save an application in Rev 4 for the
>> plugin but I don't see how it would read the changes and
>> update the client. This could also probably be done in Rev
>> like PHP so it is just updating HTML but I'm not sure how to
>> get started there.
>> 
>> Any ideas on how to start this?
>> 
>> Thanks,
>> Bill Vlahos
>> _________________
>> InfoWallet (http://www.infowallet.com). Remember the
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> 
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Bill Vlahos
_________________
InfoWallet (http://www.infowallet.com) helps me remember the important details of my life.