unify API for accessing databroker and provide implementation for other beamlines

[leofang]

Currently the GUI is tied to @NSLS-II-HXN, but other beamlines (such as @NSLS-II-CSX) may also want to use it. We should define some API for flexible coupling to beamline-specific databroker processing functions.

Part of the work will involve creating a switch of some kind to select beamline profiles. Also, defer imports of beamline-specific packages to the corresponding databroker wrappers (e.g., don't import hxntools when the main window starts).

[leofang]

See NSLS-II/PyXRF/pull/138 for how PyXRF does this.

[leofang]

I'm following up this thread (slowly!) @wen-hu, is this something that still interests you? For now I'm thinking to have a file called nsls2ptycho/core/CSX_databroker.py as a drop-in replacement so that we can switch to it in the GUI. If possible, can you show me how the following two code segments can be replaced for their equivalences at CSX?

https://github.com/leofang/ptycho_gui/blob/6803eadd911acb9e6031c493c93b5a3f998005b2/nsls2ptycho/core/HXN_databroker.py#L11-L18

https://github.com/leofang/ptycho_gui/blob/6803eadd911acb9e6031c493c93b5a3f998005b2/nsls2ptycho/core/HXN_databroker.py#L41-L100

I remember you showed me a Jupyter notebook long ago but I can't find it now. Plus you may have changed the practice in your recent experiments, so it'd also be nice for me to be updated.

Thanks!

[leofang]

It seems @NSLS-II-CHX also does some ptychography work? See NSLS-II-CHX/pyCHX.

[leofang]

The majority of this issue is resolved in #65. Closing this.

[leofang]

It seems @NSLS-II-CHX also does some ptychography work? See NSLS-II-CHX/pyCHX.

This is tracked in #67.