144 lines
4.1 KiB
Python
144 lines
4.1 KiB
Python
# Copyright 2016 Rackspace Inc.
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#
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# Author: Tim Simmons <tim.simmons@rackspace.com>
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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.mport threading
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from oslo_config import cfg
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from oslo_log import log as logging
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from designate.central import rpcapi as central_rpcapi
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from designate import quota
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from designate import storage
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from designate import utils
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from designate.worker import rpcapi as worker_rpcapi
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class TaskConfig(object):
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"""
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Configuration mixin for the various configuration settings that
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a task may want to access
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"""
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def __init__(self):
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self._config = None
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self._delay = None
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self._max_prop_time = None
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self._max_retries = None
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self._retry_interval = None
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self._timeout = None
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self._threshold_percentage = None
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@property
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def config(self):
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if not self._config:
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self._config = CONF['service:worker']
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return self._config
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@property
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def threshold_percentage(self):
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if self._threshold_percentage is None:
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self._threshold_percentage = self.config.threshold_percentage
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return self._threshold_percentage
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@property
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def timeout(self):
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if self._timeout is None:
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self._timeout = self.config.poll_timeout
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return self._timeout
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@property
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def retry_interval(self):
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if self._retry_interval is None:
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self._retry_interval = self.config.poll_retry_interval
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return self._retry_interval
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@property
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def max_retries(self):
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if self._max_retries is None:
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self._max_retries = self.config.poll_max_retries
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return self._max_retries
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@property
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def delay(self):
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if self._delay is None:
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self._delay = self.config.poll_delay
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return self._delay
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@property
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def max_prop_time(self):
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# Compute a time (seconds) by which things should have propagated
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if self._max_prop_time is None:
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self._max_prop_time = utils.max_prop_time(
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self.timeout,
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self.max_retries,
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self.retry_interval,
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self.delay
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)
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return self._max_prop_time
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class Task(TaskConfig):
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"""
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Base task interface that includes some helpful connections to other
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services and the basic skeleton for tasks.
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Tasks are:
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- Callable
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- Take an executor as their first parameter
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- Can optionally return something
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"""
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def __init__(self, executor, **kwargs):
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super(Task, self).__init__()
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self._storage = None
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self._quota = None
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self._central_api = None
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self._worker_api = None
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self.executor = executor
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self.task_name = self.__class__.__name__
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self.options = {}
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@property
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def storage(self):
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if not self._storage:
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# Get a storage connection
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storage_driver = cfg.CONF['service:central'].storage_driver
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self._storage = storage.get_storage(storage_driver)
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return self._storage
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@property
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def quota(self):
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if not self._quota:
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# Get a quota manager instance
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self._quota = quota.get_quota()
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return self._quota
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@property
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def central_api(self):
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if not self._central_api:
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self._central_api = central_rpcapi.CentralAPI.get_instance()
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return self._central_api
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@property
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def worker_api(self):
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if not self._worker_api:
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self._worker_api = worker_rpcapi.WorkerAPI.get_instance()
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return self._worker_api
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def __call__(self):
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raise NotImplementedError
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