def get_input_id_from_metadata_or_none(self, metadata: InputMetadata) \
-> Optional[str]:
input_id_bytes = self.redis.hget(_INPUT_ID_KEY, metadata.redis_field())
if not input_id_bytes:
return None
input_id = str(input_id_bytes, 'utf-8')
# We have the metadata stored, but the file doesn't exist. I can
# imagine this happening so let's make this cache mechanism resilient
# to that.
if not self._input_file_exists(input_id):
return None
else:
return input_id
def _store_input_id(self, metadata: InputMetadata, input_id: str) -> None:
field = metadata.redis_field()
self.redis.hset(_INPUT_ID_KEY, field, input_id)
log.debug(field + ': ' +
str(self.get_input_id_from_metadata_or_none(metadata)))