class_docstr: Ephemeral persistence driver
  
  This persistence driver does not actually store data anywhere--it just keeps it in memory.
class_docstr_tok: ["Ephemeral","persistence","driver","This","persistence","driver","does","not","actually","store","data","anywhere","--","it","just","keeps","it","in","memory","."]
code: def __init__(self, configuration):
      super(EphemeralDriver, self).__init__(configuration)
      self._cache = {}
  
imports: from abc import abstractmethod, ABCMeta
  from streamalert.shared.logger import get_logger
label_desc: Use image node_id 1 to create a new EphemeralDriver object from inherited base classes: PersistenceDriver with example: obj = EphemeralDriver(configuration)