jithin97 commented on a change in pull request #7322: [AIRFLOW-6593] Add GCP 
Stackdriver Alerting Hooks and Operators
URL: https://github.com/apache/airflow/pull/7322#discussion_r379713189
 
 

 ##########
 File path: airflow/providers/google/cloud/hooks/stackdriver.py
 ##########
 @@ -0,0 +1,653 @@
+#
+# 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 GCP Stackdriver operators.
+"""
+
+import json
+
+from google.api_core.exceptions import InvalidArgument
+from google.api_core.gapic_v1.method import DEFAULT
+from google.cloud import monitoring_v3
+from google.protobuf.json_format import MessageToDict, MessageToJson, Parse
+from googleapiclient.errors import HttpError
+
+from airflow import AirflowException
+from airflow.providers.google.cloud.hooks.base import CloudBaseHook
+
+
+class StackdriverHook(CloudBaseHook):
+    """
+    Stackdriver Hook for connecting with GCP Stackdriver
+    """
+
+    def __init__(self, gcp_conn_id='google_cloud_default', delegate_to=None):
+        super().__init__(gcp_conn_id, delegate_to)
+        self._policy_client = None
+        self._channel_client = None
+
+    def _get_policy_client(self):
+        if not self._policy_client:
+            self._policy_client = monitoring_v3.AlertPolicyServiceClient()
+        return self._policy_client
+
+    def _get_channel_client(self):
+        if not self._channel_client:
+            self._channel_client = 
monitoring_v3.NotificationChannelServiceClient()
+        return self._channel_client
+
+    @CloudBaseHook.fallback_to_default_project_id
+    def list_alert_policies(
+        self,
+        project_id=None,
+        format_=None,
+        filter_=None,
+        order_by=None,
+        page_size=None,
+        retry=DEFAULT,
+        timeout=DEFAULT,
+        metadata=None
 
 Review comment:
   how about 
https://github.com/apache/airflow/pull/7322/commits/86898011b3a31e03830d56af567193a6e6d54a2c

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