Hi!
I'm using GeoServer 2.4.4 (GeoWebCache v1.5.0).
I'm currently serving a layer of point (latitude/longitude) data from a PostGIS
table and have enabled direct integration GWC caching. This all works a treat
when no CQL filter is supplied...
My (generated) GWC layer configuration file is...
<GeoServerTileLayer>
<id>LayerInfoImpl-43ac45ed:143e39ae9ed:-7ffa</id>
<enabled>true</enabled>
<name>sentinel:hotspot_current</name>
<mimeFormats>
<string>image/jpeg</string>
<string>image/png</string>
</mimeFormats>
<gridSubsets>
<gridSubset>
<gridSetName>EPSG:900913</gridSetName>
</gridSubset>
<gridSubset>
<gridSetName>EPSG:4326</gridSetName>
</gridSubset>
</gridSubsets>
<metaWidthHeight>
<int>4</int>
<int>4</int>
</metaWidthHeight>
<parameterFilters>
<styleParameterFilter>
<key>STYLES</key>
<defaultValue></defaultValue>
<availableStyles class="sorted-set"/>
<defaultStyle>sentinel-legacy</defaultStyle>
</styleParameterFilter>
</parameterFilters>
<gutter>0</gutter>
</GeoServerTileLayer>
Requesting a tile and looking at the result in FireBug gives me...
http://host:port/geoserver/blah/wms?LAYERS=blah_layer&TILED=true&TRANSPARENT=TRUE&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&FORMAT=image%2Fpng&SRS=EPSG%3A3857&BBOX=15028131.255,-5009377.085,17532819.7975,-2504688.5425&WIDTH=256&HEIGHT=256
Response Headers
Cache-Control
max-age=600
Content-Disposition
inline; filename=blah_blah.png
Content-Type
image/png
Date
Mon, 10 Feb 2014 02:53:22 GMT
Etag
8528c0ee4f3307e0a303a2949d671801
Last-Modified
Mon, 10 Feb 2014 02:52:53 GMT
Server
Apache-Coyote/1.1
Transfer-Encoding
chunked
geowebcache-cache-result
HIT
geowebcache-crs
EPSG:900913
geowebcache-gridset
EPSG:900913
geowebcache-layer
blah:blah_layer
geowebcache-tile-bounds
15028131.254999999,-5009377.085000001,17532819.797500003,-2504688.5425000004
geowebcache-tile-index
[14, 6, 4]
Beautiful.
If I then add a CQL FILTER to my request it, as expected, misses the cache due
to the CQL FILTER...
http://host:port/geoserver/blah/wms?LAYERS=blah_layer&TILED=true&TRANSPARENT=TRUE&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&FORMAT=image%2Fpng&SRS=EPSG%3A3857&CQL_FILTER=a='a'&BBOX=15028131.255,-5009377.085,17532819.7975,-2504688.5425&WIDTH=256&HEIGHT=256
Response Headers
Cache-Control
max-age=600, must-revalidate
Content-Disposition
inline; filename=blah_blah.png
Content-Type
image/png
Date
Mon, 10 Feb 2014 02:57:59 GMT
Expires
Mon, 10 Feb 2014 03:07:59 GMT
Server
Apache-Coyote/1.1
Transfer-Encoding
chunked
geowebcache-cache-result
MISS
geowebcache-miss-reason
no parameter filter exists for CQL_FILTER
So, I added a CQL FILTER parameter which added the following to my GWC layer
configuration...
<parameterFilters>
<styleParameterFilter>
<key>STYLES</key>
<defaultValue></defaultValue>
<availableStyles class="sorted-set"/>
<defaultStyle>sentinel-legacy</defaultStyle>
</styleParameterFilter>
<regexParameterFilter>
<key>CQL_FILTER</key>
<defaultValue></defaultValue>
<regex>^(.*)$</regex>
</regexParameterFilter>
</parameterFilters>
But when I try my request again it now misses the cache complaining about the
FILTER parameter...
Response Headers
Cache-Control
max-age=600, must-revalidate
Content-Disposition
inline; filename=blah_blah.png
Content-Type
image/png
Date
Mon, 10 Feb 2014 03:08:53 GMT
Expires
Mon, 10 Feb 2014 03:18:53 GMT
Server
Apache-Coyote/1.1
Transfer-Encoding
chunked
geowebcache-cache-result
MISS
geowebcache-miss-reason
no parameter filter exists for FILTER
If I similarly add a parameter for FILTER (even though I'm not explicitly
sending it?) then my config file now gets...
<parameterFilters>
<styleParameterFilter>
<key>STYLES</key>
<defaultValue></defaultValue>
<availableStyles class="sorted-set"/>
<defaultStyle>sentinel-legacy</defaultStyle>
</styleParameterFilter>
<regexParameterFilter>
<key>FILTER</key>
<defaultValue></defaultValue>
<regex>^(.*)$</regex>
</regexParameterFilter>
<regexParameterFilter>
<key>CQL_FILTER</key>
<defaultValue></defaultValue>
<regex>^(.*)$</regex>
</regexParameterFilter>
</parameterFilters>
But when I try my request again then I get an exception...
<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE
ServiceExceptionReport SYSTEM
"http://10.10.19.58:8080/geoserver/schemas/wms/1.1.1/WMS_exception_1_1_1.dtd";>
<ServiceExceptionReport version="1.1.1" > <ServiceException>
java.lang.NullPointerException
null
</ServiceException></ServiceExceptionReport>
And in my geoserver log file....
2014-02-10 14:13:07,280 ERROR [geoserver.ows] -
java.lang.NullPointerException
at java.util.regex.Matcher.getTextLength(Matcher.java:1234)
at java.util.regex.Matcher.reset(Matcher.java:308)
at java.util.regex.Matcher.<init>(Matcher.java:228)
at java.util.regex.Pattern.matcher(Pattern.java:1088)
at
org.geowebcache.filter.parameters.RegexParameterFilter.getMatcher(RegexParameterFilter.java:49)
at
org.geowebcache.filter.parameters.RegexParameterFilter.applies(RegexParameterFilter.java:87)
at org.geoserver.gwc.GWC.filterApplies(GWC.java:884)
at org.geoserver.gwc.GWC.isCachingPossible(GWC.java:823)
at org.geoserver.gwc.GWC.prepareRequest(GWC.java:647)
at org.geoserver.gwc.GWC.dispatch(GWC.java:631)
at
org.geoserver.gwc.wms.CachingWebMapService.invoke(CachingWebMapService.java:83)
at
org.geoserver.gwc.wms.CachingWebMapService.invoke(CachingWebMapService.java:54)
Any clues on what I am doing wrong?
Thanks heaps!
Simon Oldfield
National Earth Observation Group | Environmental Geoscience Division |
GEOSCIENCE AUSTRALIA
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