48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
# Copyright 2022 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import eventlet
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class WaitTimeout(Exception):
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"""Default exception coming from wait_until_true() function."""
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def create_row(**kwargs):
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return type('FakeRow', (object,), kwargs)
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def wait_until_true(predicate, timeout=60, sleep=1, exception=None):
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"""Wait until callable predicate is evaluated as True
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Imported from ``neutron.common.utils``.
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:param predicate: Callable deciding whether waiting should continue.
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Best practice is to instantiate predicate with functools.partial()
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:param timeout: Timeout in seconds how long should function wait.
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:param sleep: Polling interval for results in seconds.
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:param exception: Exception instance to raise on timeout. If None is passed
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(default) then WaitTimeout exception is raised.
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"""
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try:
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with eventlet.Timeout(timeout):
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while not predicate():
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eventlet.sleep(sleep)
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except eventlet.Timeout:
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if exception is not None:
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# pylint: disable=raising-bad-type
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raise exception
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raise WaitTimeout('Timed out after %d seconds' % timeout)
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