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from __future__ import annotations
import asyncio
import warnings
from typing import TYPE_CHECKING, Any, AsyncIterator
from airflow.exceptions import AirflowProviderDeprecationWarning
from airflow.providers.amazon.aws.hooks.redshift_cluster import RedshiftAsyncHook, RedshiftHook
from airflow.providers.amazon.aws.triggers.base import AwsBaseWaiterTrigger
from airflow.triggers.base import BaseTrigger, TriggerEvent
if TYPE_CHECKING:
from airflow.providers.amazon.aws.hooks.base_aws import AwsGenericHook
[docs]class RedshiftCreateClusterTrigger(AwsBaseWaiterTrigger):
"""
Trigger for RedshiftCreateClusterOperator.
The trigger will asynchronously poll the boto3 API and wait for the
Redshift cluster to be in the `available` state.
:param cluster_identifier: A unique identifier for the cluster.
:param waiter_delay: The amount of time in seconds to wait between attempts.
:param waiter_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 | None = None,
max_attempt: int | None = None,
aws_conn_id: str | None = "aws_default",
waiter_delay: int = 15,
waiter_max_attempts: int = 999999,
):
if poll_interval is not None or max_attempt is not None:
warnings.warn(
"please use waiter_delay instead of poll_interval "
"and waiter_max_attempts instead of max_attempt.",
AirflowProviderDeprecationWarning,
stacklevel=2,
)
waiter_delay = poll_interval or waiter_delay
waiter_max_attempts = max_attempt or waiter_max_attempts
super().__init__(
serialized_fields={"cluster_identifier": cluster_identifier},
waiter_name="cluster_available",
waiter_args={"ClusterIdentifier": cluster_identifier},
failure_message="Error while creating the redshift cluster",
status_message="Redshift cluster creation in progress",
status_queries=["Clusters[].ClusterStatus"],
return_value=None,
waiter_delay=waiter_delay,
waiter_max_attempts=waiter_max_attempts,
aws_conn_id=aws_conn_id,
)
[docs] def hook(self) -> AwsGenericHook:
return RedshiftHook(aws_conn_id=self.aws_conn_id)
[docs]class RedshiftPauseClusterTrigger(AwsBaseWaiterTrigger):
"""
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 waiter_delay: The amount of time in seconds to wait between attempts.
:param waiter_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 | None = None,
max_attempts: int | None = None,
aws_conn_id: str | None = "aws_default",
waiter_delay: int = 15,
waiter_max_attempts: int = 999999,
):
if poll_interval is not None or max_attempts is not None:
warnings.warn(
"please use waiter_delay instead of poll_interval "
"and waiter_max_attempts instead of max_attempt.",
AirflowProviderDeprecationWarning,
stacklevel=2,
)
waiter_delay = poll_interval or waiter_delay
waiter_max_attempts = max_attempts or waiter_max_attempts
super().__init__(
serialized_fields={"cluster_identifier": cluster_identifier},
waiter_name="cluster_paused",
waiter_args={"ClusterIdentifier": cluster_identifier},
failure_message="Error while pausing the redshift cluster",
status_message="Redshift cluster pausing in progress",
status_queries=["Clusters[].ClusterStatus"],
return_value=None,
waiter_delay=waiter_delay,
waiter_max_attempts=waiter_max_attempts,
aws_conn_id=aws_conn_id,
)
[docs] def hook(self) -> AwsGenericHook:
return RedshiftHook(aws_conn_id=self.aws_conn_id)
[docs]class RedshiftCreateClusterSnapshotTrigger(AwsBaseWaiterTrigger):
"""
Trigger for RedshiftCreateClusterSnapshotOperator.
The trigger will asynchronously poll the boto3 API and wait for the
Redshift cluster snapshot to be in the `available` state.
:param cluster_identifier: A unique identifier for the cluster.
:param waiter_delay: The amount of time in seconds to wait between attempts.
:param waiter_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 | None = None,
max_attempts: int | None = None,
aws_conn_id: str | None = "aws_default",
waiter_delay: int = 15,
waiter_max_attempts: int = 999999,
):
if poll_interval is not None or max_attempts is not None:
warnings.warn(
"please use waiter_delay instead of poll_interval "
"and waiter_max_attempts instead of max_attempt.",
AirflowProviderDeprecationWarning,
stacklevel=2,
)
waiter_delay = poll_interval or waiter_delay
waiter_max_attempts = max_attempts or waiter_max_attempts
super().__init__(
serialized_fields={"cluster_identifier": cluster_identifier},
waiter_name="snapshot_available",
waiter_args={"ClusterIdentifier": cluster_identifier},
failure_message="Create Cluster Snapshot Failed",
status_message="Redshift Cluster Snapshot in progress",
status_queries=["Clusters[].ClusterStatus"],
return_value=None,
waiter_delay=waiter_delay,
waiter_max_attempts=waiter_max_attempts,
aws_conn_id=aws_conn_id,
)
[docs] def hook(self) -> AwsGenericHook:
return RedshiftHook(aws_conn_id=self.aws_conn_id)
[docs]class RedshiftResumeClusterTrigger(AwsBaseWaiterTrigger):
"""
Trigger for RedshiftResumeClusterOperator.
The trigger will asynchronously poll the boto3 API and wait for the
Redshift cluster to be in the `available` state.
:param cluster_identifier: A unique identifier for the cluster.
:param waiter_delay: The amount of time in seconds to wait between attempts.
:param waiter_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 | None = None,
max_attempts: int | None = None,
aws_conn_id: str | None = "aws_default",
waiter_delay: int = 15,
waiter_max_attempts: int = 999999,
):
if poll_interval is not None or max_attempts is not None:
warnings.warn(
"please use waiter_delay instead of poll_interval "
"and waiter_max_attempts instead of max_attempt.",
AirflowProviderDeprecationWarning,
stacklevel=2,
)
waiter_delay = poll_interval or waiter_delay
waiter_max_attempts = max_attempts or waiter_max_attempts
super().__init__(
serialized_fields={"cluster_identifier": cluster_identifier},
waiter_name="cluster_resumed",
waiter_args={"ClusterIdentifier": cluster_identifier},
failure_message="Resume Cluster Snapshot Failed",
status_message="Redshift Cluster resuming in progress",
status_queries=["Clusters[].ClusterStatus"],
return_value=None,
waiter_delay=waiter_delay,
waiter_max_attempts=waiter_max_attempts,
aws_conn_id=aws_conn_id,
)
[docs] def hook(self) -> AwsGenericHook:
return RedshiftHook(aws_conn_id=self.aws_conn_id)
[docs]class RedshiftDeleteClusterTrigger(AwsBaseWaiterTrigger):
"""
Trigger for RedshiftDeleteClusterOperator.
:param cluster_identifier: A unique identifier for the cluster.
:param waiter_max_attempts: The maximum number of attempts to be made.
:param aws_conn_id: The Airflow connection used for AWS credentials.
:param waiter_delay: The amount of time in seconds to wait between attempts.
"""
def __init__(
self,
cluster_identifier: str,
poll_interval: int | None = None,
max_attempts: int | None = None,
aws_conn_id: str | None = "aws_default",
waiter_delay: int = 30,
waiter_max_attempts: int = 30,
):
if poll_interval is not None or max_attempts is not None:
warnings.warn(
"please use waiter_delay instead of poll_interval "
"and waiter_max_attempts instead of max_attempt.",
AirflowProviderDeprecationWarning,
stacklevel=2,
)
waiter_delay = poll_interval or waiter_delay
waiter_max_attempts = max_attempts or waiter_max_attempts
super().__init__(
serialized_fields={"cluster_identifier": cluster_identifier},
waiter_name="cluster_deleted",
waiter_args={"ClusterIdentifier": cluster_identifier},
failure_message="Delete Cluster Failed",
status_message="Redshift Cluster deletion in progress",
status_queries=["Clusters[].ClusterStatus"],
return_value=None,
waiter_delay=waiter_delay,
waiter_max_attempts=waiter_max_attempts,
aws_conn_id=aws_conn_id,
)
[docs] def hook(self) -> AwsGenericHook:
return RedshiftHook(aws_conn_id=self.aws_conn_id)
[docs]class RedshiftClusterTrigger(BaseTrigger):
"""
RedshiftClusterTrigger is fired as deferred class with params to run the task in trigger worker.
:param aws_conn_id: Reference to AWS connection id for redshift
:param cluster_identifier: unique identifier of a cluster
:param target_status: Reference to the status which needs to be checked
:param poke_interval: polling period in seconds to check for the status
"""
def __init__(
self,
aws_conn_id: str | None,
cluster_identifier: str,
target_status: str,
poke_interval: float,
):
super().__init__()
self.aws_conn_id = aws_conn_id
self.cluster_identifier = cluster_identifier
self.target_status = target_status
self.poke_interval = poke_interval
[docs] def serialize(self) -> tuple[str, dict[str, Any]]:
"""Serialize RedshiftClusterTrigger arguments and classpath."""
return (
"airflow.providers.amazon.aws.triggers.redshift_cluster.RedshiftClusterTrigger",
{
"aws_conn_id": self.aws_conn_id,
"cluster_identifier": self.cluster_identifier,
"target_status": self.target_status,
"poke_interval": self.poke_interval,
},
)
[docs] async def run(self) -> AsyncIterator[TriggerEvent]:
"""Run async until the cluster status matches the target status."""
try:
hook = RedshiftAsyncHook(aws_conn_id=self.aws_conn_id)
while True:
res = await hook.cluster_status(self.cluster_identifier)
if (res["status"] == "success" and res["cluster_state"] == self.target_status) or res[
"status"
] == "error":
yield TriggerEvent(res)
await asyncio.sleep(self.poke_interval)
except Exception as e:
yield TriggerEvent({"status": "error", "message": str(e)})
