+ try:
+ callback = getattr(module, 'GetSlivers')
+ callback(data, config, plc)
+ except: logger.log_exc()
+
+
+def getPLCDefaults(data, config):
+ '''
+ Get PLC wide defaults from _default system slice. Adds them to config class.
+ '''
+ for slice in data.get('slivers'):
+ if slice['name'] == config.PLC_SLICE_PREFIX+"_default":
+ attr_dict = {}
+ for attr in slice.get('attributes'): attr_dict[attr['tagname']] = attr['value']
+ if len(attr_dict):
+ logger.verbose("Found default slice overrides.\n %s" % attr_dict)
+ config.OVERRIDES = attr_dict
+ return
+ # NOTE: if an _default slice existed, it would have been found above and
+ # the routine would return. Thus, if we've gotten here, then no default
+ # slice is bound to this node.
+ if 'OVERRIDES' in dir(config): del config.OVERRIDES
+