Source code for tests.system.providers.common.io.example_file_transfer_local_to_s3

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from __future__ import annotations

import os
import uuid
from datetime import datetime
from typing import cast

from airflow import DAG
from airflow.decorators import task
from airflow.io.path import ObjectStoragePath
from airflow.providers.common.io.operators.file_transfer import FileTransferOperator
from airflow.utils.trigger_rule import TriggerRule


[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")


[docs]DAG_ID = "example_file_transfer_local_to_s3"



[docs]SAMPLE_TEXT = "This is some sample text."



[docs]TEMP_FILE_PATH = ObjectStoragePath("file:///tmp")



[docs]AWS_BUCKET_NAME = f"bucket-aws-{DAG_ID}-{ENV_ID}".replace("_", "-")


[docs]AWS_BUCKET = ObjectStoragePath(f"s3://{AWS_BUCKET_NAME}")



[docs]AWS_FILE_PATH = AWS_BUCKET



@task

[docs]def create_temp_file() -> ObjectStoragePath:
    path = ObjectStoragePath(TEMP_FILE_PATH / str(uuid.uuid4()))

    with path.open("w") as file:
        file.write(SAMPLE_TEXT)

    return path



@task(trigger_rule=TriggerRule.ALL_DONE)

[docs]def delete_temp_file(path: ObjectStoragePath):
    path.unlink()



@task

[docs]def remove_bucket():
    AWS_BUCKET.rmdir(recursive=True)



with DAG(
    dag_id=DAG_ID,
    schedule="@once",
    start_date=datetime(2021, 1, 1),  # Override to match your needs
    tags=["example"],
    catchup=False,
) as dag:

[docs]    temp_file = create_temp_file()

    temp_file_path = cast(ObjectStoragePath, temp_file)

    # [START howto_transfer_local_to_s3]
    transfer = FileTransferOperator(src=temp_file_path, dst=AWS_BUCKET, task_id="transfer")
    # [END howto_transfer_local_to_s3]

    temp_file >> transfer >> remove_bucket() >> delete_temp_file(temp_file_path)

    from tests.system.utils.watcher import watcher

    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/README.md#run_via_pytest)

[docs]test_run = get_test_run(dag)

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