57 lines
2.3 KiB
Python
57 lines
2.3 KiB
Python
# Copyright 2018 Verizon Wireless
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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 time
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from oslo_serialization import jsonutils
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import requests
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from six.moves import http_client as http
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def wait_for_status(request_path, request_headers, status='active',
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max_sec=10, delay_sec=0.2, start_delay_sec=None):
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"""
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Performs a time-bounded wait for the entity at the request_path to
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reach the requested status.
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:param request_path: path to use to make the request
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:param request_headers: headers to use when making the request
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:param status: the status to wait for (default: 'active')
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:param max_sec: the maximum number of seconds to wait (default: 10)
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:param delay_sec: seconds to sleep before the next request is
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made (default: 0.2)
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:param start_delay_sec: seconds to wait before making the first
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request (default: None)
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:raises Exception: if the entity fails to reach the status within
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the requested time or if the server returns something
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other than a 200 response
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"""
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start_time = time.time()
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done_time = start_time + max_sec
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if start_delay_sec:
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time.sleep(start_delay_sec)
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while time.time() <= done_time:
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resp = requests.get(request_path, headers=request_headers)
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if resp.status_code != http.OK:
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raise Exception("Received {} response from server".format(
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resp.status_code))
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entity = jsonutils.loads(resp.text)
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if entity['status'] == status:
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return
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time.sleep(delay_sec)
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entity_id = request_path.rsplit('/', 1)[1]
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msg = "Entity {0} failed to reach status '{1}' within {2} sec"
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raise Exception(msg.format(entity_id, status, max_sec))
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