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from airflow.contrib.hooks.redshift_hook import RedshiftHook
from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.utils.decorators import apply_defaults
[docs]class AwsRedshiftClusterSensor(BaseSensorOperator):
"""
Waits for a Redshift cluster to reach a specific status.
:param cluster_identifier: The identifier for the cluster being pinged.
:type cluster_identifier: str
:param target_status: The cluster status desired.
:type target_status: str
"""
[docs] template_fields = ('cluster_identifier', 'target_status')
@apply_defaults
def __init__(self,
cluster_identifier,
target_status='available',
aws_conn_id='aws_default',
*args,
**kwargs):
super(AwsRedshiftClusterSensor, self).__init__(*args, **kwargs)
self.cluster_identifier = cluster_identifier
self.target_status = target_status
self.aws_conn_id = aws_conn_id
[docs] def poke(self, context):
self.log.info('Poking for status : %s\nfor cluster %s',
self.target_status, self.cluster_identifier)
hook = RedshiftHook(aws_conn_id=self.aws_conn_id)
return hook.cluster_status(self.cluster_identifier) == self.target_status