[GitHub] [airflow] feluelle commented on a change in pull request #6824: [AIRFLOW-6258] add CloudFormation operators to AWS providers

[GitBox <gi...@apache.org>]

feluelle commented on a change in pull request #6824: [AIRFLOW-6258] add CloudFormation operators to AWS providers
URL: https://github.com/apache/airflow/pull/6824#discussion_r369589043
 
 

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 File path: airflow/providers/amazon/aws/sensors/cloud_formation.py
 ##########
 @@ -0,0 +1,98 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""
+This module contains sensors for AWS CloudFormation.
+"""
+from airflow.providers.amazon.aws.hooks.cloud_formation import AWSCloudFormationHook
+from airflow.sensors.base_sensor_operator import BaseSensorOperator
+from airflow.utils.decorators import apply_defaults
+
+
+class CloudFormationCreateStackSensor(BaseSensorOperator):
+    """
+    Waits for a stack to be created successfully on AWS CloudFormation.
+
+    :param stack_name: The name of the stack to wait for (templated)
+    :type stack_name: str
+    :param aws_conn_id: ID of the Airflow connection where credentials and extra configuration are
+        stored
+    :type aws_conn_id: str
+    :param poke_interval: Time in seconds that the job should wait between each try
+    :type poke_interval: int
+    """
+
+    template_fields = ['stack_name']
+    ui_color = '#C5CAE9'
+
+    @apply_defaults
+    def __init__(self,
+                 stack_name,
+                 aws_conn_id='aws_default',
+                 region_name=None,
+                 *args,
+                 **kwargs):
+        super().__init__(*args, **kwargs)
+        self.stack_name = stack_name
+        self.hook = AWSCloudFormationHook(aws_conn_id=aws_conn_id, region_name=region_name)
+
+    def poke(self, context):
+        stack_status = self.hook.get_stack_status(self.stack_name)
+        if stack_status == 'CREATE_COMPLETE':
+            return True
+        elif stack_status in ('CREATE_IN_PROGRESS', None):
+            return False
+        else:
+            raise ValueError(f'Stack {self.stack_name} in bad state: {stack_status}')
+
+
+class CloudFormationDeleteStackSensor(BaseSensorOperator):
+    """
+    Waits for a stack to be deleted successfully on AWS CloudFormation.
+
+    :param stack_name: The name of the stack to wait for (templated)
+    :type stack_name: str
+    :param aws_conn_id: ID of the Airflow connection where credentials and extra configuration are
+        stored
+    :type aws_conn_id: str
+    :param poke_interval: Time in seconds that the job should wait between each try
+    :type poke_interval: int
+    """
+
+    template_fields = ['stack_name']
+    ui_color = '#C5CAE9'
+
+    @apply_defaults
+    def __init__(self,
+                 stack_name,
+                 aws_conn_id='aws_default',
+                 region_name=None,
+                 *args,
+                 **kwargs):
+        super().__init__(*args, **kwargs)
+        self.stack_name = stack_name
+        self.hook = AWSCloudFormationHook(aws_conn_id=aws_conn_id, region_name=region_name)
+
+    def poke(self, context):
+        stack_status = self.hook.get_stack_status(self.stack_name)
+        if stack_status in ('DELETE_COMPLETE', None):
+            return True
+        elif stack_status == 'DELETE_IN_PROGRESS':
+            return False
+        else:
+            raise ValueError(f'Stack {self.stack_name} in bad state: {stack_status}')
 
 Review comment:
   Same could be done here.

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