airflow athena 源码
airflow athena 代码
文件路径:/airflow/providers/amazon/aws/sensors/athena.py
#
# 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 __future__ import annotations
from typing import TYPE_CHECKING, Any, Sequence
if TYPE_CHECKING:
from airflow.utils.context import Context
from airflow.compat.functools import cached_property
from airflow.exceptions import AirflowException
from airflow.providers.amazon.aws.hooks.athena import AthenaHook
from airflow.sensors.base import BaseSensorOperator
class AthenaSensor(BaseSensorOperator):
"""
Asks for the state of the Query until it reaches a failure state or success state.
If the query fails, the task will fail.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:AthenaSensor`
:param query_execution_id: query_execution_id to check the state of
:param max_retries: Number of times to poll for query state before
returning the current state, defaults to None
:param aws_conn_id: aws connection to use, defaults to 'aws_default'
:param sleep_time: Time in seconds to wait between two consecutive call to
check query status on athena, defaults to 10
"""
INTERMEDIATE_STATES = (
'QUEUED',
'RUNNING',
)
FAILURE_STATES = (
'FAILED',
'CANCELLED',
)
SUCCESS_STATES = ('SUCCEEDED',)
template_fields: Sequence[str] = ('query_execution_id',)
template_ext: Sequence[str] = ()
ui_color = '#66c3ff'
def __init__(
self,
*,
query_execution_id: str,
max_retries: int | None = None,
aws_conn_id: str = 'aws_default',
sleep_time: int = 10,
**kwargs: Any,
) -> None:
super().__init__(**kwargs)
self.aws_conn_id = aws_conn_id
self.query_execution_id = query_execution_id
self.sleep_time = sleep_time
self.max_retries = max_retries
def poke(self, context: Context) -> bool:
state = self.hook.poll_query_status(self.query_execution_id, self.max_retries)
if state in self.FAILURE_STATES:
raise AirflowException('Athena sensor failed')
if state in self.INTERMEDIATE_STATES:
return False
return True
@cached_property
def hook(self) -> AthenaHook:
"""Create and return an AthenaHook"""
return AthenaHook(self.aws_conn_id, sleep_time=self.sleep_time)
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