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from __future__ import annotations
import json
from datetime import datetime
import boto3
from airflow.decorators import task
from airflow.models.baseoperator import chain
from airflow.models.dag import DAG
from airflow.providers.amazon.aws.operators.appflow import (
AppflowRunOperator,
)
from airflow.providers.amazon.aws.operators.s3 import (
S3CreateBucketOperator,
S3CreateObjectOperator,
S3DeleteBucketOperator,
)
from airflow.utils.trigger_rule import TriggerRule
from tests.system.providers.amazon.aws.utils import SystemTestContextBuilder
[docs]sys_test_context_task = SystemTestContextBuilder().build()
[docs]DAG_ID = "example_appflow_run"
@task
[docs]def create_s3_to_s3_flow(flow_name: str, bucket_name: str, source_folder: str):
"""creates a flow that takes a CSV and converts it to a json containing the same data"""
client = boto3.client("appflow")
client.create_flow(
flowName=flow_name,
triggerConfig={"triggerType": "OnDemand"},
sourceFlowConfig={
"connectorType": "S3",
"sourceConnectorProperties": {
"S3": {
"bucketName": bucket_name,
"bucketPrefix": source_folder,
"s3InputFormatConfig": {"s3InputFileType": "CSV"},
},
},
},
destinationFlowConfigList=[
{
"connectorType": "S3",
"destinationConnectorProperties": {
"S3": {
"bucketName": bucket_name,
"s3OutputFormatConfig": {
"fileType": "JSON",
"aggregationConfig": {
"aggregationType": "None",
},
},
}
},
},
],
tasks=[
{
"sourceFields": ["col1", "col2"],
"connectorOperator": {"S3": "PROJECTION"},
"taskType": "Filter",
},
{
"sourceFields": ["col1"],
"connectorOperator": {"S3": "NO_OP"},
"destinationField": "col1",
"taskType": "Map",
"taskProperties": {"DESTINATION_DATA_TYPE": "string", "SOURCE_DATA_TYPE": "string"},
},
{
"sourceFields": ["col2"],
"connectorOperator": {"S3": "NO_OP"},
"destinationField": "col2",
"taskType": "Map",
"taskProperties": {"DESTINATION_DATA_TYPE": "string", "SOURCE_DATA_TYPE": "string"},
},
],
)
@task
[docs]def setup_bucket_permissions(bucket_name):
s3 = boto3.client("s3")
s3.put_bucket_policy(
Bucket=bucket_name,
Policy=json.dumps(
{
"Version": "2008-10-17",
"Statement": [
{
"Sid": "AllowAppFlowSourceActions",
"Effect": "Allow",
"Principal": {"Service": "appflow.amazonaws.com"},
"Action": ["s3:ListBucket", "s3:GetObject"],
"Resource": [f"arn:aws:s3:::{bucket_name}", f"arn:aws:s3:::{bucket_name}/*"],
},
{
"Sid": "AllowAppFlowDestinationActions",
"Effect": "Allow",
"Principal": {"Service": "appflow.amazonaws.com"},
"Action": [
"s3:PutObject",
"s3:AbortMultipartUpload",
"s3:ListMultipartUploadParts",
"s3:ListBucketMultipartUploads",
"s3:GetBucketAcl",
"s3:PutObjectAcl",
],
"Resource": [f"arn:aws:s3:::{bucket_name}", f"arn:aws:s3:::{bucket_name}/*"],
},
],
}
),
)
@task(trigger_rule=TriggerRule.ALL_DONE)
[docs]def delete_flow(flow_name: str):
client = boto3.client("appflow")
client.delete_flow(flowName=flow_name, forceDelete=True)
with DAG(
dag_id=DAG_ID,
schedule="@once",
start_date=datetime(2022, 1, 1),
catchup=False,
tags=["example"],
) as dag:
[docs] test_context = sys_test_context_task()
env_id = test_context["ENV_ID"]
flow_name = f"{env_id}-flow"
bucket_name = f"{env_id}-for-appflow"
source_folder = "source"
create_bucket = S3CreateBucketOperator(task_id="create_bucket", bucket_name=bucket_name)
upload_csv = S3CreateObjectOperator(
task_id="upload_csv",
s3_bucket=bucket_name,
s3_key="source_folder/data.csv",
data="""col1,col2\n"data1","data2"\n""",
replace=True,
)
# [START howto_operator_appflow_run]
run_flow = AppflowRunOperator(
task_id="run_flow",
flow_name=flow_name,
)
# [END howto_operator_appflow_run]
run_flow.poll_interval = 1
delete_bucket = S3DeleteBucketOperator(
task_id="delete_bucket",
trigger_rule=TriggerRule.ALL_DONE,
bucket_name=bucket_name,
force_delete=True,
)
chain(
# TEST SETUP
test_context,
create_bucket,
setup_bucket_permissions(bucket_name),
upload_csv,
create_s3_to_s3_flow(flow_name, bucket_name, source_folder),
# TEST BODY
run_flow,
# TEARDOWN
delete_flow(flow_name),
delete_bucket,
)
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/README.md#run_via_pytest)
[docs]test_run = get_test_run(dag)