You can try this:
1) Spawn a tread and pass the application, sessionID and some user info into that thread.
2) Then when your task is done you can set some session variable in that users session.
3) On every page you can check for this variable and display a message based on it.
4) Then you can have the client pull a page every few seconds/minutes and this page is not a burden on the server.
4a) You can also pop-up a little window that says searching.....
The first time you pop-up the window you spawn the tread.
The second time you check for the session variable
If session.hasValue():
wl('<Script> opener.location="ResultsPage"; </script>')
else:
<meta refresh........
If the client closes the browser the task will finish and you can store the results back to his userID for next time.
-Aaron
Love, Jay wrote:
There is an example of push on the examples page of the installation. It only works for Netscape, though, because IE doesn't support the necessary HTML commands, or whatever. THere's probably an appropriate way to get the same effect for IE.Jay -----Original Message----- From: Geoffrey Talvola [mailto:gtalvola@;nameconnector.com] Sent: Wednesday, October 16, 2002 11:01 AM To: 'Stuart Donaldson'; Webware Discussion (E-mail) Subject: RE: [Webware-discuss] Support for Server Push technology? If you call self.response().flush() then it sends all accumulated response so far to the client. By alternating calls to self.write() with self.response().flush() you can stream the response to the client. I'm not sure if it responds to a broken client connection. Ideally it would raise a known exception on a broken client connection that you could choose to either catch or ignore, depending on whether you need to do any cleanup. - Geoff-----Original Message-----
From: Stuart Donaldson [mailto:stuartd@;alerton.com]
Sent: Wednesday, October 16, 2002 9:59 AM
To: Webware Discussion (E-mail)
Subject: [Webware-discuss] Support for Server Push technology?
Does webware support server push technology?
In particular, can I send information to the browser, flush the output, and
then send more information?
In one application, I need to send a page, and continually update the page
with new information until an asynchronous operation completes. I don't
want to do client-side pull with a refresh because I want the server to be
in control of refreshing the page when it is necessary.
In another application, I need to send a stream of data to an applet running
on the client.
How does the servlet then get notified if the connection to the client dies
in these cases. In the CGI model, this seems to take care of itself, as
when the connection is killed by the client, apache closes the stdout from
the cgi process and the cgi process ends up terminating. But in the
AppServer model, how would this be accomplished?
Thanks...
Stuart Donaldson
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