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This file is collection of key value pairs. It contains useful information needed by the Chimera framework to run in a generic way. This file should contain:

• The names of all the precondition function
  e.g
  

  Code Block
  language yaml
  GET_PRODUCT_METADATA = "get_product_metadata" GET_METADATA = "get_metadata" GET_ORBIT_EPHEMERIS = "get_orbit_ephemeris" DYN_ANCILLARY_FILES = "getDynamicAncillaryFileTypes" LATEST_PRODUCTS_OVER_TIME_RANGE = "get_latest_products_over_time_range" MOST_RECENT_FILES = "get_product_most_recent" MOST_RECENT_VERSION_FILES = "get_product_most_recent_version"

• Attribute names in run config
  e.g
  

  Code Block
  language yaml
  SW_VERSION_ID = "SWVersionID" INPUT_FILE_PATH = "InputFilePath" INPUT_FILE_GROUP = "InputFileGroup" STATIC_ANCILLARY_FILE_GROUP = "StaticAncillaryFileGroup" DYNAMIC_ANCILLARY_FILE_GROUP = "DynamicAncillaryFileGroup" PRODUCTION_DATE_TIME = "ProductionDateTime"

• PGE names
  e.g
  

  Code Block
  language yaml
  L0A = "L0A" TIME_EXTRACTOR = "Time_Extractor" L0B = "L0B"

First, setup this file as follows:

from chimera.commons.constants import ChimeraConstants

class ChimeraConstantsClass(ChimeraConstants):

    def __init__(self): 

        ChimeraConstants.__init__(self)

These constants can be imported by the adaptation subclasses as follows:

from [path to constants file] import ChimeraConstantsClass as nc_const

Now you can use the constants within the adaptation subclasses as follows:

crid = self._settings.get(nc_const.CRID)