pankajkoti commented on code in PR #30853:
URL: https://github.com/apache/airflow/pull/30853#discussion_r1190245323
##########
airflow/providers/amazon/aws/triggers/redshift_cluster.py:
##########
@@ -137,3 +140,73 @@ async def run(self):
},
)
yield TriggerEvent({"status": "success", "message": "Cluster Created"})
+
+
+class RedshiftPauseClusterTrigger(BaseTrigger):
+ """
+ Trigger for RedshiftPauseClusterOperator.
+ The trigger will asynchronously poll the boto3 API and wait for the
+ Redshift cluster to be in the `paused` state.
+
+ :param cluster_identifier: A unique identifier for the cluster.
+ :param poll_interval: The amount of time in seconds to wait between
attempts.
+ :param max_attempts: The maximum number of attempts to be made.
+ :param aws_conn_id: The Airflow connection used for AWS credentials.
+ """
+
+ def __init__(
+ self,
+ cluster_identifier: str,
+ poll_interval: int,
+ max_attempts: int,
+ aws_conn_id: str,
+ ):
+ self.cluster_identifier = cluster_identifier
+ self.poll_interval = poll_interval
+ self.max_attempts = max_attempts
+ self.aws_conn_id = aws_conn_id
+
+ def serialize(self) -> tuple[str, dict[str, Any]]:
+ return (
+
"airflow.providers.amazon.aws.triggers.redshift_cluster.RedshiftPauseClusterTrigger",
+ {
+ "cluster_identifier": self.cluster_identifier,
+ "poll_interval": str(self.poll_interval),
+ "max_attempts": str(self.max_attempts),
+ "aws_conn_id": self.aws_conn_id,
+ },
+ )
+
+ @cached_property
+ def hook(self) -> RedshiftHook:
+ return RedshiftHook(aws_conn_id=self.aws_conn_id)
+
+ async def run(self):
+ async with self.hook.async_conn as client:
+ attempt = 0
+ waiter = self.hook.get_waiter("cluster_paused", deferrable=True,
client=client)
+ while attempt < int(self.max_attempts):
+ attempt = attempt + 1
+ try:
+ await waiter.wait(
+ ClusterIdentifier=self.cluster_identifier,
+ WaiterConfig={
+ "Delay": int(self.poll_interval),
+ "MaxAttempts": 1,
+ },
+ )
+ break
+ except WaiterError as error:
+ if "terminal failure" in str(error):
+ yield TriggerEvent({"status": "failure", "message":
f"Pause Cluster Failed: {error}"})
+ break
+ self.log.info(
+ "Status of cluster is %s",
error.last_response["Clusters"][0]["ClusterStatus"]
+ )
+ await asyncio.sleep(int(self.poll_interval))
+ if attempt >= int(self.max_attempts):
Review Comment:
Also, why do we need to cast `self.max_attempts` to `int`? Isn't the type
`int` already as per the type annotation?
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