Excellent advice (until we have a more permanent solution) 
-------- Original Message --------
hi Arne,
Yes the tiles display correctly. This is a problem because I do need to have users click on the map and have attribute information returned somehow, preferrably without a separate database query. But I think you helped with a workaround by your suggestion.
What I implemented through openlayers was a second layer that calls the layers we want to query directly from geoserver, like you suggested. Setting the visibility property to false and displayInLayerSwitcher to false as well makes it seem as though the GWC layer is getting queried, though it's the same layer but hitting Geoserver directly. And the layers accessed directly from Geoserver don't get rendered, which is the whole point.
The drawback is that it looks dumb in the javascript, so this should all be in a separate .js src file
Thanks,
-Wes
On 10/09/2008, *Arne Kepp* <ak@anonymised.com <mailto:ak@anonymised.com>> wrote:
Hi,
getfeatureinfo is currently not supported. I'm looking into proxying
requests for this and getlegend (and other things). Should not take
long to implement, it is a bit tricky because a single GWC layer
may consist of multiple WMS layers. Don't know OpenLayers well
enough, but maybe you can define a second layer that hits the WMS
server directly?
(I assume you have tiles showing up correctly.)
-Arne
Wes Toews wrote:
hi, I have an issue with openlayers/gwc integration. I have
built an application using gwc, openlayers and geoserver, and it
works fine except for implementing the getfeatureinfo request.
When clicking on a map feature, I receive the documented
problem of:
"The bounds result in a zoom level of 6.359755367181556,
expected something within 0.05 of an integer, check
-115.386772,51.632202,-111.003228,54.367798"
I have read the documentation on this, set the maxResolution
parameter to 0.703125 as recommended in the documentation; as
well I've played with combinations of zoom levels and
maxResolutions, starting zoom and maxResolution parameters. The
resulting tiles are 256x256 pixels size.
my openlayers code looks something like this:
var mapOptions = {
maxExtent: new OpenLayers.Bounds(-180,-90,90,180),
units: 'degrees',
projection: "EPSG:4326",
maxResolution: 0.703125
};
function OLMapInit()
{
map = new OpenLayers.Map('map', mapOptions);
var myLayer = new OpenLayers.Layer.WMS("TRSI
Projects","http://localhost:8080/geowebcache/service/wms",
{
layers: 'TerraWorld',
format: 'image/png'
});
map.addLayer(myLayer);
map.zoomToExtent(initialZoomExtents);
//map.zoomToMaxExtent();
The getfeatureinfo request is standard stuff borrowed from the
Geoserver example code, nothing changed. This generates the
zoom level error cited above. Any ideas?
Thanks in advance,
-Wes
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Arne Kepp
http://opengeo.org
OpenGeo: Custom Solutions and Enterprise support
OpenLayers, GeoWebCache and GeoServer