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from __future__ import annotations

from typing import TYPE_CHECKING, Sequence

    from airflow.utils.context import Context

from airflow.compat.functools import cached_property
from airflow.models import BaseOperator
from import GlueCrawlerHook

[docs]class GlueCrawlerOperator(BaseOperator): """ Creates, updates and triggers an AWS Glue Crawler. AWS Glue Crawler is a serverless service that manages a catalog of metadata tables that contain the inferred schema, format and data types of data stores within the AWS cloud. .. seealso:: For more information on how to use this operator, take a look at the guide: :ref:`howto/operator:GlueCrawlerOperator` :param config: Configurations for the AWS Glue crawler :param aws_conn_id: aws connection to use :param poll_interval: Time (in seconds) to wait between two consecutive calls to check crawler status :param wait_for_completion: Whether or not wait for crawl execution completion. (default: True) """
[docs] template_fields: Sequence[str] = ("config",)
[docs] ui_color = "#ededed"
def __init__( self, config, aws_conn_id="aws_default", region_name: str | None = None, poll_interval: int = 5, wait_for_completion: bool = True, **kwargs, ): super().__init__(**kwargs) self.aws_conn_id = aws_conn_id self.poll_interval = poll_interval self.wait_for_completion = wait_for_completion self.region_name = region_name self.config = config @cached_property
[docs] def hook(self) -> GlueCrawlerHook: """Create and return an GlueCrawlerHook.""" return GlueCrawlerHook(self.aws_conn_id, region_name=self.region_name)
[docs] def execute(self, context: Context): """ Executes AWS Glue Crawler from Airflow :return: the name of the current glue crawler. """ crawler_name = self.config["Name"] if self.hook.has_crawler(crawler_name): self.hook.update_crawler(**self.config) else: self.hook.create_crawler(**self.config)"Triggering AWS Glue Crawler") self.hook.start_crawler(crawler_name) if self.wait_for_completion:"Waiting for AWS Glue Crawler") self.hook.wait_for_crawler_completion(crawler_name=crawler_name, poll_interval=self.poll_interval) return crawler_name

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