superset/commands/distributed_lock/get.py
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# distributed with this work for additional information
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
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from __future__ import annotations
import logging
from typing import cast
from flask import current_app
from superset.commands.distributed_lock.base import BaseDistributedLockCommand
from superset.daos.key_value import KeyValueDAO
from superset.distributed_lock.types import LockValue
logger = logging.getLogger(__name__)
stats_logger = current_app.config["STATS_LOGGER"]
class GetDistributedLock(BaseDistributedLockCommand):
def validate(self) -> None:
pass
def run(self) -> LockValue | None:
entry = KeyValueDAO.get_entry(
resource=self.resource,
key=self.key,
)
if not entry or entry.is_expired():
return None
return cast(LockValue, self.codec.decode(entry.value))