On Aug 10, 2010, at 1:05 PM, ext Hubick, William wrote:
> Hi Everyone,
>
> My project is considering GeoRSS as our data-sharing standard with partners.
> I am pleased with how easily OpenLayers will display GeoRSS points, but I'm
> wondering how other developers ensure efficient auto-updates. My first
> impression was that OpenLayers would automatically check a GeoRSS XML file
> and automatically load updates (i.e., like an RSS aggregator). When further
> exploring, it seems like custom code must be written to auto-update the layer.
>
> Am I missing something? Is there a way to ensure new points added to a GeoRSS
> file are automatically, efficiently loaded by OpenLayers (without page
> refresh)? It seems like there must be a better way to update the layer than
> destroying and reloading the GeoRSS layer.
In general, RSS feeds are not updated in 'realtime' -- there
is no way that an RSS feed can 'push' data to the client consuming
it.
Using an OpenLayers.Layer.Vector, with a Protocol.HTTP, and a
Strategy.Refresh, which has:
* Property: interval
* {Number} Auto-refresh. Default is 0. If > 0, layer will be refreshed
* every N milliseconds.
*/
interval: 0,
would allow you to tell OpenLayers to re-load the GeoRSS file
from the server every $interval milliseconds.
This doesn't solve the need to have real-time updates, but it allows
you to implement a refresh without a page reload.
-- Chris
> Any help would be greatly appreciated!
>
> Thanks in advance,
>
> Bill
>
> Bill Hubick
> Cobham Analytic Solutions
> [email protected]
>
> Please consider the environment before printing this email
>
> <ATT00001..txt>
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