On Tue, Apr 19, 2016 at 10:02 AM, Chris Buckmaster <
chris.buckmas...@runnymede.gov.uk> wrote:

> Hi
>
>
>
> I am just wondering if there is a way to programmatically delete a tile
> layer’s cache if the data from the layer is updated?
>

GWC exposes a REST api with a truncate call that you can use to delete
selected areas and zoom levels (or just everything if you want).
See the documentation:
http://docs.geoserver.org/2.8.x/en/user/geowebcache/rest/index.html


>
>
> Currently looking at trying to create a script that will just delete the
> cache from a scheduled task so I can make sure that the data is as current
> as possible (within the last day) when users are accessing the web
> application with the data on, but it would be even better if I can make it
> completely current.
>

Just call trucante when your data changes? The main issue is, how will
GeoServer get to know your
data changed? No data source normally provides this information as an
"event".
If you have a database, maybe you can setup triggers that can call the GWC
rest api for you.

Or, if you modify the data via WFS-T though GeoServer, then it will be
fully automatic (there is
an event that WFS sends to GWC to make it drop tiles)

Hope this helps

Cheers
Andrea


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