Re: [OS-webwork] Displaying a progress page

Hani Suleiman Thu, 26 Jun 2003 15:18:01 -0700

Nor should you, to be honest. You're trying to jam a square peg into a round hole. Yes, you can get pretty far, but in the end, a user will get an email with a link, and will click on it and boom, their browser window with all your lovely javascript is now replaced. Or maybe the user gets sick of it all and decides to just close the browser, or browse to another site. Sure, you could define an onunload, but that makes it an uncomfortable user interface, because it's surprising the user and doing something unexpected.

On Thursday, June 26, 2003, at 05:55 PM, Lars Fischer wrote:

These are good arguments. But I still think you can never reach the same functionality with a browser based app compared to 'traditional' (native) clients.
IMO, if you want to create a web application that acts like a desktop application, JavaScript is your best buddy. If you want to create a web application that acts like a web site (click, wait, click, wait) then don't use it.

Matt
-----Original Message-----
From: Lars Fischer [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 26, 2003 1:14 PM
To: [EMAIL PROTECTED]
Subject: RE: [OS-webwork] Displaying a progress page
Lars, just out of curiosity, what is driving the requirement for not
supporting the complete browser model (no javascript)?
These are some of the reasons:

- some IT departments do not allow JavaScript (Active Scripting) for security reasons - my applications should work with the most common browsers (e. g. I use Firebird with JavaScript turned off) and there are big differences between several browsers so it's not THE browser model - I don't want to mix user interfaces with application logic
What do the others think about using JavaScript in J2EE applications ?
Is it 'allowed' ?
Cheers
Lars
-----Original Message-----
From: Mike Cannon-Brookes [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 25, 2003 9:33 PM
To: [EMAIL PROTECTED]
Subject: Re: [OS-webwork] Displaying a progress page
Les,

You could do it using DHTML, but I'm fairly sure that's not how Expedia do it. It's a LOT more error prone to do that way :)

FWIW we're investigating creating a generic 'long running task' system for JIRA - used for tasks like reindexing and importing/exporting data which take a long time. I think using a WW action this should be relatively easy to do.

Mike
On 26/6/03 10:13 AM, "[EMAIL PROTECTED]"
([EMAIL PROTECTED])
penned the words:
I haven't actually done this yet (but am planning to) -- however,
can't
you take care of this behavior with dhtml?? It seems like you could call a javascript function on submit that pulled a layer (actully css-pos) to the top. That layer would say "in progress" with a pretty animated gif or have some neat little javascript progress bar. The javascript would then submit the form. When it's done, the browser updates. This seems like it will work and is likely better than the server side solutions. Is there something I'm missing?? BTW, I think this is how expedia used to do it.

LES
-----Original Message-----
From: Mike Cannon-Brookes [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 25, 2003 7:01 PM
To: [EMAIL PROTECTED]
Subject: Re: [OS-webwork] Displaying a progress page
Uhm, well why not just make your task runnable and run it in a new
thread?
:) Or you could use a util.Timer.
Another (nicest IMHO) alternative is to make it a scheduled task and
use
something like Quartz to kick it off.

M

On 26/6/03 6:05 AM, "Jason Carreira" ([EMAIL PROTECTED])
penned
the
words:
Well, for us we queue a JMS message. I'm not sure of another way to
start an asynch process in the J2EE spec....
-----Original Message-----
From: Lars Fischer [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 25, 2003 3:42 PM
To: [EMAIL PROTECTED]
Subject: RE: [OS-webwork] Displaying a progress page
Jason,

thanks for the reply !

Any hint how you start the asynchronous process ?

Lars

If you can start it up as an asynchronous process, you can use the trick of having a progress page which checks some state, such as a database or something in the session, and shows the progress bar or just a "processing..." and have it refresh itself using a
meta-refresh
if things aren't done... If the process is done you can
forward to a
final status page.

We've used this technique pretty successfully.

Jason
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 25, 2003 8:31 AM
To: [EMAIL PROTECTED]
Subject: [OS-webwork] Displaying a progress page
Does anyone have a good idea how to display a temporary
progress page in WW 1.x ?
I have a form where users can define paremeters for an import
of data into the local database. After submitting the page
the import method is started. This process may take a while
so I want to show a general progress page saying that
the import is running. After finishing the import I want to
return to the original page where users can start an import.
Does anyone know how to do this ? The problem seems to be
that WW is displaying the result-view AFTER the whole action
has finished.
Thanks in advance

Lars
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Re: [OS-webwork] Displaying a progress page

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