Hey there,
I've had a request to implement some better support for broken
ExternalGraphic instances. At the moment, if a URL is broken (whatever the
cause, no image), there is no great notification of this problem. The logs
will contain messages like (one for each feature, ugh):
ERROR [lite.StyledShapePainter] - ShapePainter has been asked to paint a
null style!!
One way to 'work around' this is to include a second ExternalGraphic in
one's SLD but this is not acceptable to me.
How does the idea of a 'missing graphic' feel? Like a simple icon or symbol
with coloring to set it off? I made a very ugly '?' ttf mark with green and
red as a test but would settle for anything really :)
How about some type of per-request (not per-feature as it is now) logging
about the specific missing URL? It's possible to change log levels to help
debug this but it can result in overwhelming output and does nothing to
help detect this issue earlier (like a 'missing' icon or succinct log
message might).
Another issue is that the renderer will continue to attempt to resolve the
bad URL, once for each feature, resulting in annoying web traffic for both
parties.
Any thoughts?
--
Ian Schneider
Software Engineer | Boundless
[email protected]
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