84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
# Copyright 2017 AT&T Intellectual Property. All other rights reserved.
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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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"""Abstract classes for use by implemented drivers."""
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from threading import Thread
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import time
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import drydock_provisioner.objects.fields as hd_fields
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import drydock_provisioner.error as errors
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from drydock_provisioner.orchestrator.actions.orchestrator import Noop
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class ProviderDriver(object):
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"""Generic driver for executing driver actions."""
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driver_name = "generic"
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driver_key = "generic"
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driver_desc = "Generic Provider Driver"
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def __init__(self, orchestrator=None, state_manager=None, **kwargs):
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if orchestrator is None:
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raise ValueError("ProviderDriver requires valid orchestrator")
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self.orchestrator = orchestrator
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if state_manager is None:
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raise ValueError("ProviderDriver requires valid state manager")
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self.state_manager = state_manager
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# These are the actions that this driver supports
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self.supported_actions = [hd_fields.OrchestratorAction.Noop]
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def execute_task(self, task_id):
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task = self.state_manager.get_task(task_id)
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task_action = task.action
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if task_action in self.supported_actions:
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# Just use the Noop action
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task_action = Noop(task, self.orchestrator, self.state_manager)
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task_runner = DriverActionRunner(task_action)
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task_runner.start()
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while task_runner.is_alive():
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time.sleep(1)
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return
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else:
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raise errors.DriverError("Unsupported action %s for driver %s" %
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(task_action, self.driver_desc))
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# Execute a single task in a separate thread
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class DriverActionRunner(Thread):
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def __init__(self, action=None):
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super().__init__()
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self.action = action
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self.orchestrator = action.orchestrator
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self.state_manager = action.state_manager
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def run(self):
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self.run_action()
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def run_action(self):
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"""Run self.action.start() in this thread."""
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if self.action is None:
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raise errors.NoActionDefined(
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"Runner started without a defined action.")
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self.action.start()
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