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84 lines
2.8 KiB
Python
84 lines
2.8 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from __future__ import annotations
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import logging
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from functools import partial
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from typing import Any
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import redis
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from sqlalchemy.exc import SQLAlchemyError
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from superset.commands.distributed_lock.base import (
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BaseDistributedLockCommand,
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get_redis_client,
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)
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from superset.daos.key_value import KeyValueDAO
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from superset.exceptions import ReleaseDistributedLockFailedException
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from superset.key_value.exceptions import KeyValueDeleteFailedError
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from superset.utils.decorators import on_error, transaction
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logger = logging.getLogger(__name__)
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class ReleaseDistributedLock(BaseDistributedLockCommand):
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"""
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Release a distributed lock with automatic backend selection.
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Uses Redis DELETE when DISTRIBUTED_COORDINATION_CONFIG is configured,
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otherwise deletes from KeyValue table.
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"""
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def run(self) -> None:
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if (redis_client := get_redis_client()) is not None:
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self._release_redis(redis_client)
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else:
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self._release_kv()
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def _release_redis(self, redis_client: Any) -> None:
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"""Release lock using Redis DELETE."""
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try:
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redis_client.delete(self.redis_lock_key)
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logger.debug("Released Redis lock: %s", self.redis_lock_key)
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except redis.RedisError as ex:
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# Log warning but don't raise - TTL will handle cleanup
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logger.warning(
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"Failed to release Redis lock %s: %s (TTL will handle cleanup)",
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self.redis_lock_key,
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ex,
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)
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@transaction(
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on_error=partial(
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on_error,
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catches=(
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KeyValueDeleteFailedError,
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SQLAlchemyError,
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),
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reraise=ReleaseDistributedLockFailedException,
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),
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)
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def _release_kv(self) -> None:
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"""Release lock using KeyValue table (database)."""
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KeyValueDAO.delete_entry(self.resource, self.key)
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logger.debug(
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"Released KV lock: namespace=%s key=%s",
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self.namespace,
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self.key,
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)
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