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Posted to users@wicket.apache.org by msalman <mo...@yahoo.com> on 2014/06/11 01:44:14 UTC
FileDownload hides the activity indicator
Hi,
I have code that downloads file in Ajax mode. The download is fired by
IndicatingAjaxButton. The activity indicator is visible for a very short
time but when file download code starts the activity indicator vanishes. It
is a big problem if the file takes a long time to download. Any ideas about
how to fix it? I am attaching a quick start for the test code.
ajaxfileDownload.zip
<http://apache-wicket.1842946.n4.nabble.com/file/n4666181/ajaxfileDownload.zip>
As always, I would appreciate any help in fixing this issue.
Thanks,
-msalman
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Re: FileDownload hides the activity indicator
Posted by msalman <mo...@yahoo.com>.
Hi Ernesto,
I have it like as following.
@Override
public void onSubmit(final AjaxRequestTarget target, Form<?> form)
{
// The veil and the activity indicator are already on when the code gets
here
String backupFileNameOnServer = null;
try
{
backupFileNameOnServer = startBackup(parentPage);
}
catch (Exception e)
{
BackupTabPanel.logger.error(e);
parentPage.getSession().error(e.getMessage());
target.add(parentPage.getFeedback());
}
// setup for file download
File sourceFile = new File(backupFileNameOnServer);
String downloadFileName = "backup_config_" + getServerName() + "_" +
getTime() + ".tar";
backupFileDownLoadBehaviour.initiate(sourceFile, downloadFileName,
target);
// after this the AjaxFileDownloadBehaviour#onResponse is called
// then AjaxFileDownloadBehaviour#downloadFile (overridden in the
local instance) is called
// The veil and the activity indicator are gone by the time code hits
AjaxFileDownloadBehaviour#onResponse.
}
I did not need to use another thread. Please let me know if you see any
issues with this. Or a better way of doing this.
Much appreciate your help.
Thanks.
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Re: FileDownload hides the activity indicator
Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Hi,
For some reason google mail always send your messages to my spam folder...
Answers inline
On Thu, Jun 12, 2014 at 7:27 PM, msalman <mo...@yahoo.com> wrote:
> Ernesto,
>
> Well the change seems to work. I am using a button that shows an activity
> indicator with a veil for the request. So now that activity indicator and
> veil is shown while the file is generated. But they go away when the file
> is downloaded and the user can start clicking the button again. When the
> file download is completed the requests for previous clicks start again.
>
I do not follow you. My advise was:
1- Generate file in a different thread.
2- Add and AJAX timer that checks for file generation completion.
3- Once file generation is completed. Use same AJAX request to unblock the
UI and triigger download.
>
> BTW, I just realized that my code is actually based on your code on
>
> https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow
>
>
> Thanks for putting it up. Really helpful.
>
That was the idea of creating the page. By the way, many others contributed
to make this example better.
>
> May be you can update it so that it will take care of the problem that I
> have. That is showing the activity indicator during the complete file
> generation and download.
>
There are many ways to do that in Wicket. Adding that to the page would
just bloat the solution maybe just creating a different example
illustration the approach mentioned above will be useful.
>
> Thanks again.
>
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> View this message in context:
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> Sent from the Users forum mailing list archive at Nabble.com.
>
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>
--
Regards - Ernesto Reinaldo Barreiro
Re: FileDownload hides the activity indicator
Posted by msalman <mo...@yahoo.com>.
Ernesto,
Well the change seems to work. I am using a button that shows an activity
indicator with a veil for the request. So now that activity indicator and
veil is shown while the file is generated. But they go away when the file
is downloaded and the user can start clicking the button again. When the
file download is completed the requests for previous clicks start again.
BTW, I just realized that my code is actually based on your code on
https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow
Thanks for putting it up. Really helpful.
May be you can update it so that it will take care of the problem that I
have. That is showing the activity indicator during the complete file
generation and download.
Thanks again.
--
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Re: FileDownload hides the activity indicator
Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Hi,
On Wed, Jun 11, 2014 at 8:21 PM, msalman <mo...@yahoo.com> wrote:
>
> Hi Ernesto,
>
> Generating the file first and then triggering the download sounds like a
> good idea. I think at least while the file is being generated the activity
> indicator will show.
>
Good so. You shouldn't do anything taking longer than a few seconds in a
WEB thread: think that by doing that you might deplete the thread pool of
your server as the thread will be busy generating the document and will not
be used to service other requests.
>
> I will try this.
>
> Thanks.
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/FileDownload-hides-the-activity-indicator-tp4666181p4666212.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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>
>
--
Regards - Ernesto Reinaldo Barreiro
Re: FileDownload hides the activity indicator
Posted by msalman <mo...@yahoo.com>.
Hi Ernesto,
Generating the file first and then triggering the download sounds like a
good idea. I think at least while the file is being generated the activity
indicator will show.
I will try this.
Thanks.
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Re: FileDownload hides the activity indicator
Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Hi,
On Wed, Jun 11, 2014 at 6:30 PM, msalman <mo...@yahoo.com> wrote:
> Hi Ernesto,
>
> Thank you for your quick response. But I think I did not explain the
> problem that I am trying to solve. What is happening in my case is that
> when I click the IndicatingAjaxButton to start the file download, the
> activity indicator (that twirling round thing) appears. But it then
> disappears very quickly just when the code starts generating and
> downloading
> the file. All this while, without the activity indicator, the user does
> not
> know if any thing is happening and so may click the button again and again.
>
This is exactly what the articles I sent explain: it seems there is no hook
for detecting downloading been triggered/finished. I did not read them but
I think they proposed a workaround.
http://geekswithblogs.net/GruffCode/archive/2010/10/28/detecting-the-file-download-dialog-in-the-browser.aspx
Another possibility is:
1- Generate the file
2- Once it is ready trigger the download. I.e. poll the server to see if
generation finished. Then use polling ajax request to trigger download.
> The solutions that you have sent me the links to, are for problems relating
> to the GUI not being responsive after the file has been downloaded. I do
> not have that problem. I just don't want the user to click the button
> again
> while the file is being downloaded.
>
> Also, unfortunately other than Wicket and simple html, I do not know much
> about other GUI tools including Javascript. So I would appreciate very
> much
> if you can provide me with a solution that I can easily use in wickets.
>
> I do not promise anything as I'm rather busy at the moment... but let me
see if I can come up with an example.
> Again, thanks so much for your response.
>
>
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/FileDownload-hides-the-activity-indicator-tp4666181p4666209.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
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>
>
--
Regards - Ernesto Reinaldo Barreiro
Re: FileDownload hides the activity indicator
Posted by msalman <mo...@yahoo.com>.
Hi Ernesto,
Thank you for your quick response. But I think I did not explain the
problem that I am trying to solve. What is happening in my case is that
when I click the IndicatingAjaxButton to start the file download, the
activity indicator (that twirling round thing) appears. But it then
disappears very quickly just when the code starts generating and downloading
the file. All this while, without the activity indicator, the user does not
know if any thing is happening and so may click the button again and again.
The solutions that you have sent me the links to, are for problems relating
to the GUI not being responsive after the file has been downloaded. I do
not have that problem. I just don't want the user to click the button again
while the file is being downloaded.
Also, unfortunately other than Wicket and simple html, I do not know much
about other GUI tools including Javascript. So I would appreciate very much
if you can provide me with a solution that I can easily use in wickets.
Again, thanks so much for your response.
--
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Re: FileDownload hides the activity indicator
Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
1-
http://stackoverflow.com/questions/683571/jquery-blockui-how-to-unblock-ui-after-file-download
2-
http://geekswithblogs.net/GruffCode/archive/2010/10/28/detecting-the-file-download-dialog-in-the-browser.aspx
3-http://hasselba.ch/blog/?p=1274
On Wed, Jun 11, 2014 at 1:44 AM, msalman <mo...@yahoo.com> wrote:
> Hi,
>
> I have code that downloads file in Ajax mode. The download is fired by
> IndicatingAjaxButton. The activity indicator is visible for a very short
> time but when file download code starts the activity indicator vanishes.
> It
> is a big problem if the file takes a long time to download. Any ideas
> about
> how to fix it? I am attaching a quick start for the test code.
>
>
> ajaxfileDownload.zip
> <
> http://apache-wicket.1842946.n4.nabble.com/file/n4666181/ajaxfileDownload.zip
> >
>
> As always, I would appreciate any help in fixing this issue.
>
> Thanks,
>
> -msalman
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/FileDownload-hides-the-activity-indicator-tp4666181.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
--
Regards - Ernesto Reinaldo Barreiro