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Design discussion

Design discussion

2005-04-12 - By jon

Back

Reply: 1 2 3 4 5 6 7 8 9 10 >>

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@(protected)]On Behalf Of Maya menon
> Sent: Tuesday, April 12, 2005 11:36 AM
> To: J2EEPATTERNS-INTEREST@(protected)
> 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@(protected)
phone: 905-668-9209 fax: 905-668-4728
http://www.petruk.net/

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 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.

 > ?

 > ?

<blockquote style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px;
margin-left: 5px;">

 > -- --Original Message-- --
 > From: An interest list for
Sun

Java Center J2EE Pattern Catalog

[mailto:J2EEPATTERNS-INTEREST@(protected)]On Behalf Of Maya

menon
 > Sent: Tuesday, April 12, 2005 11:36 AM
 > To:

J2EEPATTERNS-INTEREST@(protected)
 > 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,
 >
 >

<blockquote style="border-left: 2px solid rgb(16, 16, 255); padding-left: 5px
; margin-left: 5px;" class="replbq">?
</blockquote>

 >

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search.

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_250">Learn

more.</a> ===================================================================
=

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Unsubscribing: email "signoff J2EEPATTERNS-INTEREST" to

listserv@(protected)</blockquote>

 >

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This email has been scanned by the MessageLabs Email Security System.
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For more information please visit http://www.messagelabs.com/email
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listserv@(protected)

 
 
 --

 
Jonathan Petruk

 
J. Petruk Consulting Inc.

 
E-mail: jon@(protected)

 
phone: ?905-668-9209 ? ? fax: 905-668-4728

 
<a target="_blank" href="http://www.petruk.net/">http://www.petruk.net/</a>

 

 

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