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# 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 __future__ import annotations
from functools import cached_property
from typing import TYPE_CHECKING, Sequence
from airflow.exceptions import AirflowNotFoundException
from airflow.providers.amazon.aws.hooks.rds import RdsHook
from airflow.providers.amazon.aws.utils.rds import RdsDbType
from airflow.sensors.base import BaseSensorOperator
if TYPE_CHECKING:
from airflow.utils.context import Context
class RdsBaseSensor(BaseSensorOperator):
"""Base operator that implements common functions for all sensors."""
ui_color = "#ddbb77"
ui_fgcolor = "#ffffff"
def __init__(
self, *args, aws_conn_id: str | None = "aws_conn_id", hook_params: dict | None = None, **kwargs
):
self.hook_params = hook_params or {}
self.aws_conn_id = aws_conn_id
self.target_statuses: list[str] = []
super().__init__(*args, **kwargs)
@cached_property
def hook(self):
return RdsHook(aws_conn_id=self.aws_conn_id, **self.hook_params)
[docs]class RdsSnapshotExistenceSensor(RdsBaseSensor):
"""
Waits for RDS snapshot with a specific status.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:RdsSnapshotExistenceSensor`
:param db_type: Type of the DB - either "instance" or "cluster"
:param db_snapshot_identifier: The identifier for the DB snapshot
:param target_statuses: Target status of snapshot
"""
[docs] template_fields: Sequence[str] = (
"db_snapshot_identifier",
"target_statuses",
)
def __init__(
self,
*,
db_type: str,
db_snapshot_identifier: str,
target_statuses: list[str] | None = None,
aws_conn_id: str | None = "aws_conn_id",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_type = RdsDbType(db_type)
self.db_snapshot_identifier = db_snapshot_identifier
self.target_statuses = target_statuses or ["available"]
[docs] def poke(self, context: Context):
self.log.info(
"Poking for statuses : %s\nfor snapshot %s", self.target_statuses, self.db_snapshot_identifier
)
try:
if self.db_type.value == "instance":
state = self.hook.get_db_snapshot_state(self.db_snapshot_identifier)
else:
state = self.hook.get_db_cluster_snapshot_state(self.db_snapshot_identifier)
except AirflowNotFoundException:
return False
return state in self.target_statuses
[docs]class RdsExportTaskExistenceSensor(RdsBaseSensor):
"""
Waits for RDS export task with a specific status.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:RdsExportTaskExistenceSensor`
:param export_task_identifier: A unique identifier for the snapshot export task.
:param target_statuses: Target status of export task
"""
[docs] template_fields: Sequence[str] = (
"export_task_identifier",
"target_statuses",
)
def __init__(
self,
*,
export_task_identifier: str,
target_statuses: list[str] | None = None,
aws_conn_id: str | None = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.export_task_identifier = export_task_identifier
self.target_statuses = target_statuses or [
"starting",
"in_progress",
"complete",
"canceling",
"canceled",
]
[docs] def poke(self, context: Context):
self.log.info(
"Poking for statuses : %s\nfor export task %s", self.target_statuses, self.export_task_identifier
)
try:
state = self.hook.get_export_task_state(self.export_task_identifier)
except AirflowNotFoundException:
return False
return state in self.target_statuses
[docs]class RdsDbSensor(RdsBaseSensor):
"""
Waits for an RDS instance or cluster to enter one of a number of states.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:RdsDbSensor`
:param db_type: Type of the DB - either "instance" or "cluster" (default: 'instance')
:param db_identifier: The AWS identifier for the DB
:param target_statuses: Target status of DB
"""
[docs] template_fields: Sequence[str] = (
"db_identifier",
"db_type",
"target_statuses",
)
def __init__(
self,
*,
db_identifier: str,
db_type: RdsDbType | str = RdsDbType.INSTANCE,
target_statuses: list[str] | None = None,
aws_conn_id: str | None = "aws_default",
**kwargs,
):
super().__init__(aws_conn_id=aws_conn_id, **kwargs)
self.db_identifier = db_identifier
self.target_statuses = target_statuses or ["available"]
self.db_type = db_type
[docs] def poke(self, context: Context):
db_type = RdsDbType(self.db_type)
self.log.info(
"Poking for statuses : %s\nfor db instance %s", self.target_statuses, self.db_identifier
)
try:
if db_type == RdsDbType.INSTANCE:
state = self.hook.get_db_instance_state(self.db_identifier)
else:
state = self.hook.get_db_cluster_state(self.db_identifier)
except AirflowNotFoundException:
return False
return state in self.target_statuses
__all__ = [
"RdsExportTaskExistenceSensor",
"RdsDbSensor",
"RdsSnapshotExistenceSensor",
]