99 строки
4.0 KiB
Python
99 строки
4.0 KiB
Python
#
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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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"""TaskReschedule tracks rescheduled task instances."""
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from sqlalchemy import Column, ForeignKeyConstraint, Index, Integer, String, asc, desc
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from airflow.models.base import COLLATION_ARGS, ID_LEN, Base
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from airflow.utils.session import provide_session
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from airflow.utils.sqlalchemy import UtcDateTime
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class TaskReschedule(Base):
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"""TaskReschedule tracks rescheduled task instances."""
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__tablename__ = "task_reschedule"
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id = Column(Integer, primary_key=True)
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task_id = Column(String(ID_LEN, **COLLATION_ARGS), nullable=False)
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dag_id = Column(String(ID_LEN, **COLLATION_ARGS), nullable=False)
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execution_date = Column(UtcDateTime, nullable=False)
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try_number = Column(Integer, nullable=False)
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start_date = Column(UtcDateTime, nullable=False)
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end_date = Column(UtcDateTime, nullable=False)
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duration = Column(Integer, nullable=False)
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reschedule_date = Column(UtcDateTime, nullable=False)
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__table_args__ = (
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Index('idx_task_reschedule_dag_task_date', dag_id, task_id, execution_date, unique=False),
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ForeignKeyConstraint(
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[task_id, dag_id, execution_date],
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['task_instance.task_id', 'task_instance.dag_id', 'task_instance.execution_date'],
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name='task_reschedule_dag_task_date_fkey',
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ondelete='CASCADE',
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),
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)
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def __init__(self, task, execution_date, try_number, start_date, end_date, reschedule_date):
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self.dag_id = task.dag_id
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self.task_id = task.task_id
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self.execution_date = execution_date
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self.try_number = try_number
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self.start_date = start_date
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self.end_date = end_date
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self.reschedule_date = reschedule_date
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self.duration = (self.end_date - self.start_date).total_seconds()
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@staticmethod
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@provide_session
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def query_for_task_instance(task_instance, descending=False, session=None):
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"""
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Returns query for task reschedules for a given the task instance.
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:param session: the database session object
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:type session: sqlalchemy.orm.session.Session
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:param task_instance: the task instance to find task reschedules for
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:type task_instance: airflow.models.TaskInstance
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:param descending: If True then records are returned in descending order
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:type descending: bool
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"""
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TR = TaskReschedule
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qry = session.query(TR).filter(
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TR.dag_id == task_instance.dag_id,
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TR.task_id == task_instance.task_id,
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TR.execution_date == task_instance.execution_date,
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TR.try_number == task_instance.try_number,
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)
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if descending:
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return qry.order_by(desc(TR.id))
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else:
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return qry.order_by(asc(TR.id))
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@staticmethod
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@provide_session
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def find_for_task_instance(task_instance, session=None):
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"""
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Returns all task reschedules for the task instance and try number,
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in ascending order.
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:param session: the database session object
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:type session: sqlalchemy.orm.session.Session
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:param task_instance: the task instance to find task reschedules for
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:type task_instance: airflow.models.TaskInstance
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"""
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return TaskReschedule.query_for_task_instance(task_instance, session=session).all()
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