def __init__(self, config, db):
super(GetBucketKeyByLock, self).__init__(config, db)<EOL>lock_key = config.get('<STR_LIT>', '<STR_LIT>')<EOL>timeout = get_int(config, '<STR_LIT>', <NUM_LIT:30>)<EOL>self.lock = db.lock(lock_key, timeout=timeout)<EOL>LOG.debug("<STR_LIT>")<EOL>
Initialize a GetBucketKeyByLock instance.

:param config: A dictionary of compactor options.
:param db: A database handle for the Redis database.