102 строки
2.7 KiB
Python
102 строки
2.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. 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,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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from abc import ABCMeta, abstractmethod, abstractproperty
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class BaseDag(object):
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"""
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Base DAG object that both the SimpleDag and DAG inherit.
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"""
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__metaclass__ = ABCMeta
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@abstractproperty
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def dag_id(self):
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"""
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:return: the DAG ID
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:rtype: unicode
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"""
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raise NotImplementedError()
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@abstractproperty
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def task_ids(self):
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"""
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:return: A list of task IDs that are in this DAG
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:rtype: List[unicode]
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"""
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raise NotImplementedError()
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@abstractproperty
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def full_filepath(self):
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"""
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:return: The absolute path to the file that contains this DAG's definition
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:rtype: unicode
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"""
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raise NotImplementedError()
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@abstractmethod
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def concurrency(self):
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"""
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:return: maximum number of tasks that can run simultaneously from this DAG
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:rtype: int
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"""
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raise NotImplementedError()
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@abstractmethod
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def is_paused(self):
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"""
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:return: whether this DAG is paused or not
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:rtype: bool
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"""
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raise NotImplementedError()
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@abstractmethod
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def pickle_id(self):
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"""
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:return: The pickle ID for this DAG, if it has one. Otherwise None.
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:rtype: unicode
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"""
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raise NotImplementedError
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class BaseDagBag(object):
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"""
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Base object that both the SimpleDagBag and DagBag inherit.
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"""
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@abstractproperty
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def dag_ids(self):
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"""
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:return: a list of DAG IDs in this bag
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:rtype: List[unicode]
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"""
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raise NotImplementedError()
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@abstractmethod
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def get_dag(self, dag_id):
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"""
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:return: whether the task exists in this bag
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:rtype: airflow.dag.base_dag.BaseDag
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"""
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raise NotImplementedError()
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