Cleaner yes, but really asynchronous ala ajax? Nope :-)
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  ----- Original Message -----
  From: An interest list for Sun Java Center J2EE Pattern Catalog [J2EEPATTERNS-INTEREST@java.sun.com]
  Sent: 04/13/2005 02:48 AM
  To: J2EEPATTERNS-INTEREST@java.sun.com
  Subject: Re: Design discussion

-----Original Message-----
From: An interest list for Sun Java Center J2EE Pattern Catalog [mailto:J2EEPATTERNS-INTEREST@JAVA.SUN.COM]On Behalf Of Ramnish Kalsi
Sent: 12 Nisan 2005 Salý 19:43
To: J2EEPATTERNS-INTEREST@JAVA.SUN.COM
Subject: Re: Design discussion

On the client side, the technology which google uses is also pretty clean - AJAX - Asynchronous javascript and xml.

There are some good discussions about this on serverside.com

 

But, depends upon, how you want to divide the responsibilities between client and server.

 

ramnish.

 

 -----Original Message-----
From: An interest list for Sun Java Center J2EE Pattern Catalog [mailto:J2EEPATTERNS-INTEREST@JAVA.SUN.COM]On Behalf Of jon
Sent: 12 April 2005 17:38
To: J2EEPATTERNS-INTEREST@JAVA.SUN.COM
Subject: Re: Design discussion

I saw a product once that used Javascript to interact with an applet, which then established network connections on its behalf.  I think in that case it was only using straight "pull" HTTP requests, but presumably you could open a connection that would accept a server-initiated "push".

I would expect such an approach to be pretty involved, but you might want to research it more.

Regards,
Jon Petruk


On Tue, 12 Apr 2005 12:22:07 -0400, Vijay K Dasari wrote
> In Client/ Server model using thick clients like SWING, we can  use an Observer Pattern ( Publish/Subscribe ), where
> the client subscribes to the messages. when the server gets a new message, it can notify all the subscribers(users).
>  
> As Web (HTTP) is stateless, the client has to ask the server for the new messages.
> Client can make request to a servlet(which tells whether the user has any new messages) at certain time intervals.
> In html we can use the "Refresh" metatag. which looks something like
>  
> <meta http-equiv="Refresh" content="1800;URL=/servlet/checkNewMessages.do"/>
>  
>  
> Vijay.
>  
>  

> -----Original Message-----
> From: An interest list for Sun Java Center J2EE Pattern Catalog [mailto:J2EEPATTERNS-INTEREST@JAVA.SUN.COM]On Behalf Of Maya menon
> Sent: Tuesday, April 12, 2005 11:36 AM
> To: J2EEPATTERNS-INTEREST@JAVA.SUN.COM
> Subject: Design discussion
>
>
> Our client/server application which work realtime:
> Currently we have a client/server application. Our users log into the client and the system delivers messages to the users.
> when a new message arrives the users see a signal flashing and therby gets notified about the
> new message.
>  
> Now this client needs to be transformed into a web based system.
>
> Instead of the clients logging into the client window, now the users log into the web site.
> The same feature has to be provided.
> when a new message arrives the users have to see a signal flashing and therby gets notified about the
> new message.
> Can you all please suggest a good J2ee design approach for this ?
>  
> How do we enable the flashing signal ? I need some suggestions.
>  
> Thanks,
>
>

>

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--
Jonathan Petruk
J. Petruk Consulting Inc.
E-mail: jon@petruk.net
phone:  905-668-9209     fax: 905-668-4728
http://www.petruk.net/

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