[GitHub] [airflow] lwyszomi commented on a change in pull request #21251: Google Cloud Composer opearators - with the deferrable option

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

lwyszomi commented on a change in pull request #21251:
URL: https://github.com/apache/airflow/pull/21251#discussion_r801605075



##########
File path: airflow/providers/google/cloud/operators/cloud_composer.py
##########
@@ -0,0 +1,696 @@
+#
+# 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.
+from datetime import datetime
+from typing import TYPE_CHECKING, Dict, Optional, Sequence, Tuple, Union
+
+from google.api_core.exceptions import AlreadyExists
+from google.api_core.retry import Retry
+from google.cloud.orchestration.airflow.service_v1 import ImageVersion
+from google.cloud.orchestration.airflow.service_v1.types import Environment
+from google.protobuf.field_mask_pb2 import FieldMask
+
+from airflow import AirflowException
+from airflow.models import BaseOperator, BaseOperatorLink, XCom
+from airflow.providers.google.cloud.hooks.cloud_composer import CloudComposerHook
+from airflow.providers.google.cloud.triggers.cloud_composer import CloudComposerExecutionTrigger
+from airflow.providers.google.common.consts import GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME
+
+if TYPE_CHECKING:
+    from airflow.utils.context import Context
+
+CLOUD_COMPOSER_BASE_LINK = "https://console.cloud.google.com/composer/environments"
+CLOUD_COMPOSER_DETAILS_LINK = (
+    CLOUD_COMPOSER_BASE_LINK + "/detail/{region}/{environment_id}/monitoring?project={project_id}"
+)
+CLOUD_COMPOSER_ENVIRONMENTS_LINK = CLOUD_COMPOSER_BASE_LINK + '?project={project_id}'
+
+
+class CloudComposerEnvironmentLink(BaseOperatorLink):
+    """Helper class for constructing Cloud Composer Environment Link"""
+
+    name = "Cloud Composer Environment"
+
+    def get_link(self, operator: BaseOperator, dttm: datetime) -> str:
+        conf = XCom.get_one(
+            key="composer_conf", dag_id=operator.dag.dag_id, task_id=operator.task_id, execution_date=dttm
+        )
+        return (
+            CLOUD_COMPOSER_DETAILS_LINK.format(
+                project_id=conf["project_id"], region=conf['region'], environment_id=conf['environment_id']
+            )
+            if conf
+            else ""
+        )
+
+
+class CloudComposerEnvironmentsLink(BaseOperatorLink):
+    """Helper class for constructing Cloud Composer Environment Link"""
+
+    name = "Cloud Composer Environment List"
+
+    def get_link(self, operator: BaseOperator, dttm: datetime) -> str:
+        conf = XCom.get_one(
+            key="composer_conf", dag_id=operator.dag.dag_id, task_id=operator.task_id, execution_date=dttm
+        )
+        return CLOUD_COMPOSER_ENVIRONMENTS_LINK.format(project_id=conf["project_id"]) if conf else ""
+
+
+class CloudComposerCreateEnvironmentOperator(BaseOperator):
+    """
+    Create a new environment.
+
+    :param project_id: Required. The ID of the Google Cloud project that the service belongs to.
+    :param region: Required. The ID of the Google Cloud region that the service belongs to.
+    :param environment_id: Required. The ID of the Google Cloud environment that the service belongs to.
+    :param environment:  The environment to create.
+    :param gcp_conn_id:
+    :param impersonation_chain: Optional service account to impersonate using short-term
+        credentials, or chained list of accounts required to get the access_token
+        of the last account in the list, which will be impersonated in the request.
+        If set as a string, the account must grant the originating account
+        the Service Account Token Creator IAM role.
+        If set as a sequence, the identities from the list must grant
+        Service Account Token Creator IAM role to the directly preceding identity, with first
+        account from the list granting this role to the originating account (templated).
+    :param delegate_to: The account to impersonate using domain-wide delegation of authority,
+        if any. For this to work, the service account making the request must have
+        domain-wide delegation enabled.
+    :param retry: Designation of what errors, if any, should be retried.
+    :param timeout: The timeout for this request.
+    :param metadata: Strings which should be sent along with the request as metadata.
+    :param deferrable: Run operator in the deferrable mode
+    :param pooling_period_seconds: Optional: Control the rate of the poll for the result of deferrable run.
+        By default the trigger will poll every 30 seconds.
+    """
+
+    template_fields = (
+        'project_id',
+        'region',
+        'environment_id',
+        'environment',
+        'impersonation_chain',
+    )
+
+    operator_extra_links = (CloudComposerEnvironmentLink(),)
+
+    def __init__(
+        self,
+        *,
+        project_id: str,
+        region: str,
+        environment_id: str,
+        environment: Union[Environment, Dict],
+        gcp_conn_id: str = "google_cloud_default",
+        impersonation_chain: Optional[Union[str, Sequence[str]]] = None,
+        delegate_to: Optional[str] = None,
+        retry: Optional[Retry] = None,
+        timeout: Optional[float] = None,
+        metadata: Sequence[Tuple[str, str]] = (),
+        deferrable: bool = False,
+        pooling_period_seconds: int = 30,
+        **kwargs,
+    ) -> None:
+        super().__init__(**kwargs)
+        self.project_id = project_id
+        self.region = region
+        self.environment_id = environment_id
+        self.environment = environment
+        self.retry = retry
+        self.timeout = timeout
+        self.metadata = metadata
+        self.gcp_conn_id = gcp_conn_id
+        self.impersonation_chain = impersonation_chain
+        self.delegate_to = delegate_to
+        self.deferrable = deferrable
+        self.pooling_period_seconds = pooling_period_seconds
+
+    def execute(self, context: 'Context'):
+        hook = CloudComposerHook(
+            gcp_conn_id=self.gcp_conn_id,
+            impersonation_chain=self.impersonation_chain,
+            delegate_to=self.delegate_to,
+        )
+
+        name = hook.get_environment_name(self.project_id, self.region, self.environment_id)
+        if isinstance(self.environment, Environment):
+            self.environment.name = name
+        else:
+            self.environment["name"] = name
+
+        self.xcom_push(
+            context,
+            key='composer_conf',
+            value={
+                "project_id": self.project_id,
+                "region": self.region,
+                "environment_id": self.environment_id,
+            },
+        )

Review comment:
       @turbaszek Good idea, already changed.




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