Hello Guys Thanks for your answers,
@Patrice<mailto:[email protected]>
I considered using a string to replace the geom parameter but we will loose the
wps interface typing the geotiff is seen as a LitteralData string type (when we
do the describe process request for example).
@Andrea
I think I ll try your solution knowing that there is something like this
already implemented in the examples
(https://github.com/geoserver/geoserver/blob/master/src/community/script/py/src/test/resources/org/geoserver/script/py/raw.py)
This solution create a more strongly typed XML (relatively to the first
solution) however we ll loose the possibility to pass the data as a reference
(through the xlink attribute in the input element)
Thanks again,
Chadi
________________________________
De : [email protected] <[email protected]> de la part de Andrea Aime
<[email protected]>
Envoyé : vendredi 7 juillet 2017 09:42
À : P O'Toole
Cc : [email protected]; [email protected]
Objet : Re: [Geoserver-users] Reference download in geoserver WPS extension
Hi,
in the Java world a process that wants to do its own encoding/decoding can be
done using
the RawData class as input or output, as follows:
@DescribeResult(name = "result", description = "Output raster", meta = {
"mimeTypes=application/json,text/xml",
"chosenMimeType=outputMimeType" })
public RawData execute(
@DescribeParameter(name = "data", description = "Input features",
meta = { "mimeTypes=application/json,text/xml" }) final RawData input,
@DescribeParameter(name = "outputMimeType", min = 0) final String
outputMimeType,
@DescribeParameter(name = "returnNull", min = 0, defaultValue =
"false") final boolean returnNull) {
However, I don't know if this can be translated into the scripting modules
support for WPS, or not (these
modules are unsupported and have not been modified in quite some time, not sure
what is their
working state... contributors helping to revive them warmly welcomed :-) ).
Cheers
Andrea
On Thu, Jul 6, 2017 at 10:24 PM, P O'Toole
<[email protected]<mailto:[email protected]>> wrote:
Chadi -
>Hello,
>I am currently using the WPSextension for geoserver (2.10) and the python
>script hooks in order to add my own processes.
>I noticed that geoserver downloads the image before giving a handle on the
>"geom" object in the python script.
>Is it possible to disable this feature and to have only the URL reference
>passed to the script hook ?
>If no, is it possible to download locally the file before executing the script
>?
One way around this would be to declare the 'geom' input-parameter as a string,
and then simply instantiate objects as-needed within Python. That way, the
Java/WPS container will not try to do any downloading for you if you
don't want it to, since it would just see a string, rather than a remote
resource. Jython should allow you to import the GeoTIFF class from Java as you
would a regular Python module so you can build it yourself as needed (e.g.
`from org.postgresql import PGStatement` and `import java.sql.SQLException`
work fine from Jython, despite those being Java packages rather than Python
modules.)
If that approach doesn't fit your requirements, I would recommend finding the
handler-class that takes these requests and prepares to give them to Python,
since it sounds like it happens before long before Python starts to do any
work on the request. In either case, the could should reveal whether there are
branches that skip downloads under certain conditions. If there aren't, you may
need to create a subclass that has the behavior you want.
- Patrick
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