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from typing import TYPE_CHECKING, Optional, Sequence

from import RedshiftHook
from airflow.sensors.base import BaseSensorOperator

    from airflow.utils.context import Context

[docs]class RedshiftClusterSensor(BaseSensorOperator): """ Waits for a Redshift cluster to reach a specific status. .. seealso:: For more information on how to use this sensor, take a look at the guide: :ref:`howto/sensor:RedshiftClusterSensor` :param cluster_identifier: The identifier for the cluster being pinged. :param target_status: The cluster status desired. """
[docs] template_fields: Sequence[str] = ('cluster_identifier', 'target_status')
def __init__( self, *, cluster_identifier: str, target_status: str = 'available', aws_conn_id: str = 'aws_default', **kwargs, ): super().__init__(**kwargs) self.cluster_identifier = cluster_identifier self.target_status = target_status self.aws_conn_id = aws_conn_id self.hook: Optional[RedshiftHook] = None
[docs] def poke(self, context: 'Context'):'Poking for status : %s\nfor cluster %s', self.target_status, self.cluster_identifier) return self.get_hook().cluster_status(self.cluster_identifier) == self.target_status
[docs] def get_hook(self) -> RedshiftHook: """Create and return a RedshiftHook""" if self.hook: return self.hook self.hook = RedshiftHook(aws_conn_id=self.aws_conn_id) return self.hook

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