A Remote "Gdal Contour" Process Binding Example
Before continue reading this section, please be sure to have fully understood and successfully completed all the passages at sections:
- Deployment And Setup Of GeoServer With WPS Remote Plugin
- Installation Of OpenFire XMPP Server To Exchange Messages
- Deployment And Setup Of The XMPP Python Wrappers
Running the Python WPS Agent
In order to start the RemoteWPS Python Wrapper, we need to run an instance of the wpsagent.py using the configuration files defined at section Deployment And Setup Of The XMPP Python Wrappers
$> cd C:\work\RemoteWPS
$> python wpsagent.py -r .\xmpp_data\configs\remote.config -s .\xmpp_data\configs\myservice\service.config service
Few instants after the execution of the command, you should be able to see con invite message on the prompt
and the default.GdalContour instance successfully connected and authenticated into the XMPP Server channels
The new GeoServer WPS Process should be now available among the GeoServer Processes
The GeoServer Remote Process Factory automatically creates the WPS interface for the new process, exposing through the OGC WPS Protocol the Inputs and Outputs definitions like shown in the illustration below
At the Execute Request the Remote WPS Python framework starts a new thread and assigns to it the unique execution_id provided by GeoServer.
The logs of the execution are stored into the working directory
From the log file is possible to recognize the full command line executed by the Remote WPS Python wrapper along with the lines received through the standard output
The main window shows the received XMPP messages and the actions taken accordingly
Note
The same information can be found into the log file specified into the "logger.properties" file (see above).
On GeoServer side, it is possible to follow the process execution by following the messages sent via XMPP to the GeoServer logs
