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88 lines
2.9 KiB
Python
88 lines
2.9 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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# pylint: disable=invalid-name
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from typing import Any
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from uuid import UUID
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import pytest
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from freezegun import freeze_time
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from sqlalchemy.orm import Session, sessionmaker
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from superset.exceptions import CreateKeyValueDistributedLockFailedException
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from superset.key_value.types import JsonKeyValueCodec
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from superset.utils.lock import get_key, KeyValueDistributedLock
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MAIN_KEY = get_key("ns", a=1, b=2)
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OTHER_KEY = get_key("ns2", a=1, b=2)
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def _get_lock(key: UUID, session: Session) -> Any:
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from superset.key_value.models import KeyValueEntry
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entry = session.query(KeyValueEntry).filter_by(uuid=key).first()
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if entry is None or entry.is_expired():
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return None
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return JsonKeyValueCodec().decode(entry.value)
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def _get_other_session() -> Session:
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# This session is used to simulate what another worker will find in the metastore
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# during the locking process.
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from superset import db
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bind = db.session.get_bind()
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SessionMaker = sessionmaker(bind=bind)
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return SessionMaker()
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def test_key_value_distributed_lock_happy_path() -> None:
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"""
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Test successfully acquiring and returning the distributed lock.
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"""
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session = _get_other_session()
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with freeze_time("2021-01-01"):
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assert _get_lock(MAIN_KEY, session) is None
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with KeyValueDistributedLock("ns", a=1, b=2) as key:
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assert key == MAIN_KEY
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assert _get_lock(key, session) is True
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assert _get_lock(OTHER_KEY, session) is None
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with pytest.raises(CreateKeyValueDistributedLockFailedException):
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with KeyValueDistributedLock("ns", a=1, b=2):
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pass
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assert _get_lock(MAIN_KEY, session) is None
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def test_key_value_distributed_lock_expired() -> None:
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"""
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Test expiration of the distributed lock
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"""
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session = _get_other_session()
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with freeze_time("2021-01-01T"):
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assert _get_lock(MAIN_KEY, session) is None
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with KeyValueDistributedLock("ns", a=1, b=2):
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assert _get_lock(MAIN_KEY, session) is True
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with freeze_time("2022-01-01T"):
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assert _get_lock(MAIN_KEY, session) is None
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assert _get_lock(MAIN_KEY, session) is None
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