Source code for airflow.models.taskreschedule

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"""TaskReschedule tracks rescheduled task instances."""
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(
.all() )

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