Process Graph Testing: Local backend for testing

[przell]

Title	Process Graph Testing: Local backend for testing
Date	2021-11-11
Issue	#88
Category	Usability, Debugging
Description	In the python client their are thoughts to create a "local mode": Load data locally and apply a process graph to it. Whereas the local python functions mimic the functions in the backend. This is valuable for debugging and tracing the dimensionality of a datacube in a process graph at a given point. For the R-Client this would mean to implement all openEO functions in R (probably using stars).
Dependencies	stars
Links	Local Prototyping
Priority	Low
Impact	High

In the python client their are thoughts to create a "local mode": Load data locally and apply a process graph to it.
I guess since many things rely on xarray in python (and many process are already written in python at the backend) it will not be a very long stretch.
I don't know how much effort this would be to implement in R?

[przell]

Load collection - save result -> NetCDF -> Load to stars object
Test openEO processes locally (map open processes to R functions)

[przell]

Effort for implementing all the functions in R would be too high
Possibility to use python local mode via dedicated API as soon as python has implemented it
General question about usefulness
--> Highly optional that we will implement this in the R4openEO

[przell]

Out of Scope