43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
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# Copyright (C) 2024 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# 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, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import time
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from typing import Callable
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class UnexpectedBehaviorError(Exception):
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"""Raised when there is an unexpected behavior during applying a procedure."""
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def expect_with_retry(
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predicate: Callable[[], bool],
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retry_action: Callable[[], None] = None,
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max_retries: int = 10,
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retry_interval_sec: int = 1,
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) -> None:
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"""Executes a predicate and retries if it doesn't return True."""
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for retry in range(max_retries):
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if predicate():
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return None
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else:
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if retry == max_retries - 1:
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break
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if retry_action:
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retry_action()
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time.sleep(retry_interval_sec)
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raise UnexpectedBehaviorError(
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"Predicate didn't become true after " + str(max_retries) + " retries."
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)
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