We wrote one for Tapestry 3. We wrote a service and then in our HTML we have
an IFrame.
<span jwcid="@Conditional" condition="ognl:page.visit.hasBlobUrl">
<iframe jwcid="@Any" src="ognl:page.visit.blobUrl" width="0"
height="0" frameborder="0"/>
</span>
The code sets up the "blob". Which when the HTML is displayed automatically
creates the download.
/* one example download */
DownloadService ds = (DownloadService)
parent.getCycle().getEngine().getService(DownloadService.SERVICE_NAME);
ILink blobLink = ds.registerBlob(parent.getCycle(), null, b);
// Save the download link to the visit object so that the next redraw
of the
// frame will include an iframe to kick off the download
parent.getSystemVisit().setBlobUrl(blobLink.getAbsoluteURL());
/* Another example automatic download */
// Grab our download service and register the generated metadata with it
DownloadService ds =
(DownloadService)getCycle().getEngine().getService(DownloadService.SERVICE_NAME);
ILink blobLink = ds.registerBlob(getCycle(), null, b);
// Save the download link to the visit object so that the next redraw
of the
// frame will include an iframe to kick off the download
getSystemVisit().setBlobUrl(blobLink.getAbsoluteURL());
We haven't converted it to Tap4 yet.
regards,
Mark
-----Original Message-----
From: Schulte Marcus [mailto:[EMAIL PROTECTED]
Sent: Wed 1/25/2006 6:11 AM
To: 'Tapestry users'
Subject: RE: Wiring up an Export service
Your listener could return an ILink which would be a service-link created
by your service's getLink() method which contains all necessary parameters.
Or you could display a result-page with an appropriate download link to you
service (ServiceLink component)
> -----Original Message-----
> From: Steve Wells [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, January 25, 2006 10:04 AM
> To: [email protected]
> Subject: Wiring up an Export service
>
>
> Like many folks I have a requirement to stream out reports
> (or whatever)
> in various formats eg pdf, xls
>
> Following some threads here I've started writing a Service to handle
> this but am having trouble wiring it into my pages (some basic Tap
> knowledge is eluding me here)
>
> The basic flow is:
> ReportCriteria page to collect parameters eg. date range,
> export format
> Form submit listener calls ReportResult page to get the
> report data and
> spit out to user in selected format...
> ...OR should the listener call the service, if so how?
>
> Any more detailed code examples or tips would be fantastic. I'm
> starting to feel a bit dumb right now as I can't see how a
> page talks to
> a service.
>
> Thanks...
> --
> Steve Wells
> [EMAIL PROTECTED]
>
> --
> http://www.fastmail.fm - Or how I learned to stop worrying and
> love email again
>
>
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