Source code for

# 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
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
Example DAG using GoogleDriveToLocalOperator.

Using this operator requires the following additional scopes:

from __future__ import annotations

import logging
import os
from datetime import datetime
from pathlib import Path

from airflow.decorators import task
from airflow.models import Connection
from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
from import GCSCreateBucketOperator, GCSDeleteBucketOperator
from import GoogleDriveToLocalOperator
from import LocalFilesystemToGCSOperator
from import GoogleDriveHook
from import GoogleDriveFileExistenceSensor
from import GCSToGoogleDriveOperator
from airflow.settings import Session, json
from airflow.utils.trigger_rule import TriggerRule

[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]DAG_ID = "example_gdrive_to_local"
[docs]CONNECTION_ID = f"connection_{DAG_ID}_{ENV_ID}"
[docs]FILE_NAME = "empty.txt"
[docs]DRIVE_FILE_NAME = f"empty_{DAG_ID}_{ENV_ID}.txt".replace("-", "_")
[docs]OUTPUT_FILE = "out_file.txt"
[docs]BUCKET_NAME = f"bucket_{DAG_ID}_{ENV_ID}"
[docs]LOCAL_PATH = str(Path(__file__).parent / "resources" / FILE_NAME)
[docs]log = logging.getLogger(__name__)
with DAG( DAG_ID, start_date=datetime(2021, 1, 1), schedule="@once", catchup=False, tags=["example", "gdrive"], ) as dag: @task
[docs] def create_temp_gcp_connection(): conn = Connection( conn_id=CONNECTION_ID, conn_type="google_cloud_platform", ) conn_extra_json = json.dumps( { "scope": "," "" } ) conn.set_extra(conn_extra_json) session = Session() if session.query(Connection).filter(Connection.conn_id == CONNECTION_ID).first(): log.warning("Connection %s already exists", CONNECTION_ID) return None session.add(conn) session.commit()
create_temp_gcp_connection_task = create_temp_gcp_connection() create_bucket = GCSCreateBucketOperator( task_id="create_bucket", bucket_name=BUCKET_NAME, project_id=PROJECT_ID ) upload_file = LocalFilesystemToGCSOperator( task_id="upload_file", src=LOCAL_PATH, dst=FILE_NAME, bucket=BUCKET_NAME, ) copy_single_file = GCSToGoogleDriveOperator( task_id="copy_single_file", gcp_conn_id=CONNECTION_ID, source_bucket=BUCKET_NAME, source_object=FILE_NAME, destination_object=DRIVE_FILE_NAME, ) # [START detect_file] detect_file = GoogleDriveFileExistenceSensor( task_id="detect_file", gcp_conn_id=CONNECTION_ID, folder_id="", file_name=DRIVE_FILE_NAME, ) # [END detect_file] # [START download_from_gdrive_to_local] download_from_gdrive_to_local = GoogleDriveToLocalOperator( task_id="download_from_gdrive_to_local", gcp_conn_id=CONNECTION_ID, folder_id="", file_name=DRIVE_FILE_NAME, output_file=OUTPUT_FILE, ) # [END download_from_gdrive_to_local] @task(trigger_rule=TriggerRule.ALL_DONE) def remove_file_from_drive(): service = GoogleDriveHook(gcp_conn_id=CONNECTION_ID).get_conn() response = service.files().list(q=f"name = '{DRIVE_FILE_NAME}'").execute() if files := response["files"]: file = files[0]"Deleting file {}...", file) service.files().delete(fileId=file["id"])"Done.") remove_file_from_drive_task = remove_file_from_drive() delete_bucket = GCSDeleteBucketOperator( task_id="delete_bucket", bucket_name=BUCKET_NAME, trigger_rule=TriggerRule.ALL_DONE ) delete_temp_gcp_connection_task = BashOperator( task_id="delete_temp_gcp_connection", bash_command=f"airflow connections delete {CONNECTION_ID}", trigger_rule=TriggerRule.ALL_DONE, ) ( # TEST SETUP [create_bucket >> upload_file >> copy_single_file, create_temp_gcp_connection_task] # TEST BODY >> detect_file >> download_from_gdrive_to_local # TEST TEARDOWN >> remove_file_from_drive_task >> [delete_bucket, delete_temp_gcp_connection_task] ) from tests.system.utils.watcher import watcher # This test needs watcher in order to properly mark success/failure # when "tearDown" task with trigger rule is part of the DAG list(dag.tasks) >> watcher() from tests.system.utils import get_test_run # noqa: E402 # Needed to run the example DAG with pytest (see: tests/system/
[docs]test_run = get_test_run(dag)

Was this entry helpful?