Even if the images are dynamically generated, couldn't we serialize the
highest "path" value used on shutdown and reuse it on startup? Consider
the following use-case:
- Images are dynamically generated from a DB
- Expiration headers are set to cache the images for one day on the
client end
- Wicket's resource cache expiration is also set to one day
So ... while the images are dynamic, they are also cached (for a
limited period of time). This use-case works fine if the server is never
restarted. All we'd need is a simple fix to make it work across restarts.
Gili
Eelco Hillenius wrote:
That's why we introduced packaged resources in the first place: to
have static urls. If you don't have static urls, your browser
shouldn't cache them. Don't we set expiry headers?
Eelco
On 10/1/05, Gili <[EMAIL PROTECTED]> wrote:
Hi,
I'm using PageableGridDataView to display a grid of images. Here is an
example URL for a thumbnail on a page:
http://localhost:8084/DesktopBeautifierServer/Main?path=11:imageRow:1:cols:4:imageWidth:imageLink:image&interface=IResourceListener
The problem is that upon server restart the path counter resets. Now,
if a user hits the image listing again, his browser recognizes the
original URL and uses the cached image. However, path=11 in the new
server instance does not equal to path=11 in the old server instance, so
the cached image is incorrect.
Is there a way for us to serialize the "path" values on shutdown and
pick them up on restart? This will ensure the browser cache doesn't
display incorrect images. I don't mind if users can't hit older pages
(i.e. path=10 and below) because they don't exist in the new server
instance but at least the counter should begin at the last used value +1
Let me know what you think.
Thanks,
Gili
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