119 lines
2.7 KiB
Python
119 lines
2.7 KiB
Python
# Eos - Verifiable elections
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# Copyright © 2017-18 RunasSudo (Yingtong Li)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from eos.core.objects import *
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class TaskStatus(EosEnum):
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UNKNOWN = 0
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READY = 20
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PROCESSING = 30
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COMPLETE = 50
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FAILED = -10
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TIMEOUT = -20
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def is_error(self):
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return self.value < 0
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class Task(TopLevelObject):
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label = 'Unknown task'
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_id = UUIDField()
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run_strategy = EmbeddedObjectField()
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run_at = DateTimeField()
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started_at = DateTimeField()
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completed_at = DateTimeField()
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status = EnumField(TaskStatus, default=TaskStatus.UNKNOWN)
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messages = ListField(StringField())
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def run(self):
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self.run_strategy.run(self)
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def _run(self):
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pass
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def complete(self):
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pass
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def error(self):
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pass
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class DummyTask(Task):
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_db_name = Task._db_name
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label = 'A dummy task'
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def _run(self):
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if is_python:
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#__pragma__('skip')
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import time
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#__pragma__('noskip')
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time.sleep(15)
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class RunStrategy(DocumentObject):
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def run(self, task):
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raise Exception('Not implemented')
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class TaskScheduler:
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@staticmethod
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def pending_tasks():
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pending_tasks = []
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tasks = Task.get_all()
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for task in tasks:
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if task.status == TaskStatus.READY:
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pending_tasks.append(task)
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# Sort them to ensure we iterate over them in the correct order
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pending_tasks.sort(key=lambda task: task.run_at.timestamp() if task.run_at else 0)
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return pending_tasks
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@staticmethod
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def active_tasks():
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active_tasks = []
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tasks = Task.get_all()
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for task in tasks:
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if task.status == TaskStatus.PROCESSING:
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active_tasks.append(task)
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return active_tasks
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@staticmethod
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def completed_tasks(limit=None):
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completed_tasks = []
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tasks = Task.get_all()
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for task in tasks:
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if task.status == TaskStatus.COMPLETE or task.status.is_error():
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completed_tasks.append(task)
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if limit:
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completed_tasks.sort(key=lambda x: x.completed_at)
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completed_tasks = completed_tasks[-limit:]
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return completed_tasks
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@staticmethod
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def tick():
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for task in TaskScheduler.pending_tasks():
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if task.run_at and task.run_at < DateTimeField.now():
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task.run()
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