Source code for airflow.models.taskreschedule

# -*- coding: utf-8 -*-
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

from sqlalchemy import Column, ForeignKeyConstraint, Index, Integer, String, asc

from airflow.models.base import Base, ID_LEN
from airflow.utils.db import provide_session
from airflow.utils.sqlalchemy import UtcDateTime


[docs]class TaskReschedule(Base): """ TaskReschedule tracks rescheduled task instances. """
[docs] __tablename__ = "task_reschedule"
[docs] id = Column(Integer, primary_key=True)
[docs] task_id = Column(String(ID_LEN), nullable=False)
[docs] dag_id = Column(String(ID_LEN), nullable=False)
[docs] execution_date = Column(UtcDateTime, nullable=False)
[docs] try_number = Column(Integer, nullable=False)
[docs] start_date = Column(UtcDateTime, nullable=False)
[docs] end_date = Column(UtcDateTime, nullable=False)
[docs] duration = Column(Integer, nullable=False)
[docs] reschedule_date = Column(UtcDateTime, nullable=False)
[docs] __table_args__ = ( Index('idx_task_reschedule_dag_task_date', dag_id, task_id, execution_date, unique=False), ForeignKeyConstraint([task_id, dag_id, execution_date], ['task_instance.task_id', 'task_instance.dag_id', 'task_instance.execution_date'], name='task_reschedule_dag_task_date_fkey', ondelete='CASCADE')
) def __init__(self, task, execution_date, try_number, start_date, end_date, reschedule_date): self.dag_id = task.dag_id self.task_id = task.task_id self.execution_date = execution_date self.try_number = try_number self.start_date = start_date self.end_date = end_date self.reschedule_date = reschedule_date self.duration = (self.end_date - self.start_date).total_seconds() @staticmethod @provide_session
[docs] def find_for_task_instance(task_instance, session): """ Returns all task reschedules for the task instance and try number, in ascending order. :param task_instance: the task instance to find task reschedules for :type task_instance: airflow.models.TaskInstance """ TR = TaskReschedule return ( session .query(TR) .filter(TR.dag_id == task_instance.dag_id, TR.task_id == task_instance.task_id, TR.execution_date == task_instance.execution_date, TR.try_number == task_instance.try_number) .order_by(asc(TR.id))
.all() )