Support for DXF and Geopackage extension

[woutergd]

We are verifying if it is possible to integrate the dxf and geopackage output format extensions within Geoserver Cloud. Is there any specific reason that these are currently excluded, or is just due to different priorities that they haven't been added?

Links to the extensions:

• https://docs.geoserver.org/stable/en/user/extensions/dxf/index.html
• https://docs.geoserver.org/stable/en/user/extensions/geopkg-output/index.html

[buehner]

Hi. I don't think that there are technical/blocking reasons that the dxf extension is not (yet) available. For GeoServer Cloud, we always need special code/config to make extensions available. So I guess someone "just has to do it" (at least in case of "simple" extensions" it shouldn't be that hard).

I always wanted to try to make a new extension available for geoserver cloud, so maybe I will find some time within the next days to give the DXF one a try. I will let you know here

[woutergd]

@buehner thanks for your response, good to hear that there are no practical limitations on this addition.

I was already working on the integration, so see the PR over here: #542 with probably the required modifications. If there is anything that need to be changed, just let me know.

[mehul-bayer]

Is there any documentation outlining the steps or a procedure to add extensions?

[woutergd]

Apparently something went wrong with my PR. I made a new PR with just the DXF extension (#543), this one seems to work fine. It fails on two tests, but I noted that these are unrelated an other PR's had the same issues.

What I found out is that the Geopackage extension wants to use wmsserver / wms as imports, as the extension can used on both WMS and WFS (see https://github.com/geoserver/geoserver/blob/main/src/extension/geopkg-output/src/main/java/applicationContext.xml).

Are there any architectural guidelines what the best implementation is to solve this? I would assume the best solution is to modify the extension upstream to split it into a version for WFS and WMS, and then import both in the dedicated services?

[groldan]

Closing as fixed by #543