>
> Given that clients might also want to follow the link and get the legend
> graphics, this could
> be coupled with a dispatcher callback that intercepts the legend graphic
> request and if it
> matches the one used to generate the PNG file, we could just shortcut and
> return the file on disk, getting some caching benefit
>
I was more thinking the GetCapabilities document could provide a URL
straight to those generated images. The GetCapabilities document is
supposed to link to a URL, nothing says that URL has to be a
GetLegendGraphic request (especially since GetLegendGraphics is an
optional operation).
We'd still need the "last updated" information in the style files, which
> could become something standard, or maybe could be done by attaching a
> style specific listener to the catalog
>
You could also check resource modification time on the style file, and
compare against your generated image.
--
Jody
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