Source code for airflow.providers.amazon.aws.sensors.dms
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from __future__ import annotations
from functools import cached_property
from typing import TYPE_CHECKING, Iterable, Sequence
from deprecated import deprecated
from airflow.exceptions import AirflowException
from airflow.providers.amazon.aws.hooks.dms import DmsHook
from airflow.sensors.base import BaseSensorOperator
if TYPE_CHECKING:
from airflow.utils.context import Context
[docs]class DmsTaskBaseSensor(BaseSensorOperator):
"""
Contains general sensor behavior for DMS task.
Subclasses should set ``target_statuses`` and ``termination_statuses`` fields.
:param replication_task_arn: AWS DMS replication task ARN
:param aws_conn_id: aws connection to uses
:param target_statuses: the target statuses, sensor waits until
the task reaches any of these states
:param termination_statuses: the termination statuses, sensor fails when
the task reaches any of these states
"""
[docs] template_fields: Sequence[str] = ("replication_task_arn",)
[docs] template_ext: Sequence[str] = ()
def __init__(
self,
replication_task_arn: str,
aws_conn_id="aws_default",
target_statuses: Iterable[str] | None = None,
termination_statuses: Iterable[str] | None = None,
*args,
**kwargs,
):
super().__init__(*args, **kwargs)
self.aws_conn_id = aws_conn_id
self.replication_task_arn = replication_task_arn
self.target_statuses: Iterable[str] = target_statuses or []
self.termination_statuses: Iterable[str] = termination_statuses or []
@deprecated(reason="use `hook` property instead.")
[docs] def get_hook(self) -> DmsHook:
"""Get DmsHook."""
return self.hook
@cached_property
[docs] def hook(self) -> DmsHook:
return DmsHook(self.aws_conn_id)
[docs] def poke(self, context: Context):
status: str | None = self.hook.get_task_status(self.replication_task_arn)
if not status:
raise AirflowException(
f"Failed to read task status, task with ARN {self.replication_task_arn} not found"
)
self.log.info("DMS Replication task (%s) has status: %s", self.replication_task_arn, status)
if status in self.target_statuses:
return True
if status in self.termination_statuses:
raise AirflowException(f"Unexpected status: {status}")
return False
[docs]class DmsTaskCompletedSensor(DmsTaskBaseSensor):
"""
Pokes DMS task until it is completed.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:DmsTaskCompletedSensor`
:param replication_task_arn: AWS DMS replication task ARN
"""
[docs] template_fields: Sequence[str] = ("replication_task_arn",)
[docs] template_ext: Sequence[str] = ()
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.target_statuses = ["stopped"]
self.termination_statuses = [
"creating",
"deleting",
"failed",
"failed-move",
"modifying",
"moving",
"ready",
"testing",
]
