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82 lines
2.8 KiB
82 lines
2.8 KiB
# |
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# Licensed to the Apache Software Foundation (ASF) under one |
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# or more contributor license agreements. See the NOTICE file |
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# distributed with this work for additional information |
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# regarding copyright ownership. The ASF licenses this file |
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# to you under the Apache License, Version 2.0 (the |
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# "License"); you may not use this file except in compliance |
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# with the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, |
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# software distributed under the License is distributed on an |
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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# KIND, either express or implied. See the License for the |
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# specific language governing permissions and limitations |
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# under the License. |
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try: |
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from functools import cached_property |
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except ImportError: |
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from cached_property import cached_property |
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from airflow.models import BaseOperator |
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from airflow.providers.amazon.aws.hooks.glue_crawler import AwsGlueCrawlerHook |
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from airflow.utils.decorators import apply_defaults |
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class AwsGlueCrawlerOperator(BaseOperator): |
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""" |
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Creates, updates and triggers an AWS Glue Crawler. AWS Glue Crawler is a serverless |
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service that manages a catalog of metadata tables that contain the inferred |
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schema, format and data types of data stores within the AWS cloud. |
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:param config: Configurations for the AWS Glue crawler |
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:type config: dict |
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:param aws_conn_id: aws connection to use |
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:type aws_conn_id: Optional[str] |
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:param poll_interval: Time (in seconds) to wait between two consecutive calls to check crawler status |
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:type poll_interval: Optional[int] |
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""" |
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ui_color = "#ededed" |
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@apply_defaults |
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def __init__( |
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self, |
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config, |
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aws_conn_id="aws_default", |
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poll_interval: int = 5, |
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**kwargs, |
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): |
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super().__init__(**kwargs) |
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self.aws_conn_id = aws_conn_id |
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self.poll_interval = poll_interval |
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self.config = config |
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@cached_property |
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def hook(self) -> AwsGlueCrawlerHook: |
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"""Create and return an AwsGlueCrawlerHook.""" |
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return AwsGlueCrawlerHook(self.aws_conn_id) |
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def execute(self, context): |
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""" |
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Executes AWS Glue Crawler from Airflow |
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:return: the name of the current glue crawler. |
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""" |
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crawler_name = self.config["Name"] |
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if self.hook.has_crawler(crawler_name): |
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self.hook.update_crawler(**self.config) |
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else: |
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self.hook.create_crawler(**self.config) |
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self.log.info("Triggering AWS Glue Crawler") |
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self.hook.start_crawler(crawler_name) |
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self.log.info("Waiting for AWS Glue Crawler") |
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self.hook.wait_for_crawler_completion( |
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crawler_name=crawler_name, poll_interval=self.poll_interval |
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) |
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return crawler_name
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