def lock(self, key, owner, timeout=None, expire=None):
if not self.locker:
db = self.mongo_database()
self.locker = MongoLock(client=db.client, db=db.name)
try:
with self.locker(key, owner, timeout=timeout, expire=expire):
yield
except MongoLockLocked:
#lock_doc = self.locker.get_lock_info(key)
raise errors.Locked(key=key, owner=owner)
finally:
self.locker.release(key, owner)
