airflow glue_crawler 源码
airflow glue_crawler 代码
文件路径：/airflow/providers/amazon/aws/sensors/glue_crawler.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, Sequence
from airflow.exceptions import AirflowException
from airflow.providers.amazon.aws.hooks.glue_crawler import GlueCrawlerHook
from airflow.sensors.base import BaseSensorOperator
if TYPE_CHECKING:
from airflow.utils.context import Context
class GlueCrawlerSensor(BaseSensorOperator):
"""
Waits for an AWS Glue crawler to reach any of the statuses below
'FAILED', 'CANCELLED', 'SUCCEEDED'
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:GlueCrawlerSensor`
:param crawler_name: The AWS Glue crawler unique name
:param aws_conn_id: aws connection to use, defaults to 'aws_default'
"""
template_fields: Sequence[str] = ('crawler_name',)
def __init__(self, *, crawler_name: str, aws_conn_id: str = 'aws_default', **kwargs) -> None:
super().__init__(**kwargs)
self.crawler_name = crawler_name
self.aws_conn_id = aws_conn_id
self.success_statuses = 'SUCCEEDED'
self.errored_statuses = ('FAILED', 'CANCELLED')
self.hook: GlueCrawlerHook | None = None
def poke(self, context: Context):
hook = self.get_hook()
self.log.info("Poking for AWS Glue crawler: %s", self.crawler_name)
crawler_state = hook.get_crawler(self.crawler_name)['State']
if crawler_state == 'READY':
self.log.info("State: %s", crawler_state)
crawler_status = hook.get_crawler(self.crawler_name)['LastCrawl']['Status']
if crawler_status == self.success_statuses:
self.log.info("Status: %s", crawler_status)
return True
else:
raise AirflowException(f"Status: {crawler_status}")
else:
return False
def get_hook(self) -> GlueCrawlerHook:
"""Returns a new or pre-existing GlueCrawlerHook"""
if self.hook:
return self.hook
self.hook = GlueCrawlerHook(aws_conn_id=self.aws_conn_id)
return self.hook
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