105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
# Copyright (c) 2021-2022 Wind River Systems, Inc.
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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
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# 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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#
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# SPDX-License-Identifier: Apache-2.0
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import heapq
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import time
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from eventlet.queue import PriorityQueue
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from oslo_log import log
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LOG = log.getLogger(__name__)
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class SubcloudAuditData(object):
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"""Representation of a subcloud under audit.
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"""
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def __init__(self, name, audit_count=0):
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self.name = name
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self.audit_count = audit_count
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self.timestamp = 0
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def __eq__(self, other):
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return self.name == other.name
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def __lt__(self, other):
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"""Used in sorting the PriorityQueue"""
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return self.timestamp < other.timestamp
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def __hash__(self):
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return hash(self.name)
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def __str__(self):
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return "SubcloudAuditData: {name: %s, audit_count: %s}" % (
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self.name, self.audit_count)
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class SubcloudAuditException(Exception):
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"""Indicates subcloud audit issue"""
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pass
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class SubcloudAuditPriorityQueue(PriorityQueue):
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"""A subclass of PriorityQueue which tracks enqueued subclouds"""
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def _init(self, maxsize=None):
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self.enqueued_subcloud_names = list()
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PriorityQueue._init(self, maxsize)
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@staticmethod
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def __get_next_audit_timestamp(delay_secs):
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next_audit_timestamp = int(time.time())
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if delay_secs > 0:
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next_audit_timestamp += delay_secs
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return next_audit_timestamp
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def contains(self, subcloud_name):
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"""Check if subcloud is under audit"""
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return subcloud_name in self.enqueued_subcloud_names
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def enqueue(self, sc_audit_item, delay_secs=0,
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timestamp=None, allow_requeue=False):
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"""Custom top-level method to enqueue a subcloud in the audit
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- convert delay to timestamp
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- increment audit_count
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"""
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if (sc_audit_item.name in self.enqueued_subcloud_names
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and not allow_requeue):
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raise SubcloudAuditException("Subcloud already enqueued: %s"
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% sc_audit_item.name)
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if timestamp is None:
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timestamp = self.__get_next_audit_timestamp(delay_secs)
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else:
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timestamp += delay_secs
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# this PriorityQueue is ordered by the next timestamp:
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sc_audit_item.audit_count += 1
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sc_audit_item.timestamp = timestamp
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self.put(
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(timestamp, sc_audit_item)
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)
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def _get(self, heappop=heapq.heappop):
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"""Modifies PriorityQueue.get() to track audited subcloud names"""
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item = PriorityQueue._get(self, heappop)
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self.enqueued_subcloud_names.remove(item[1].name)
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return item
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def _put(self, item, heappush=heapq.heappush):
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"""Modifies PriorityQueue.put() to track audited subcloud names"""
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subcloud_audit = item[1]
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self.enqueued_subcloud_names.append(subcloud_audit.name)
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LOG.info("Enqueued: %s" % str(subcloud_audit))
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PriorityQueue._put(self, item, heappush)
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