dabla opened a new pull request, #60268:
URL: https://github.com/apache/airflow/pull/60268
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This PR is related to the discussion I started on the
[devlist](https://lists.apache.org/thread/ztnfsqolow4v1zsv4pkpnxc1fk0hbf2p) and
which allows you to natively execute async code on PythonOperators.
There is also an AIP for this:
https://cwiki.apache.org/confluence/display/AIRFLOW/%5BWIP%5D+AIP-98%3A+Rethinking+deferrable+operators%2C+async+hooks+and+performance+in+Airflow+3
Below an example which show you how it can be used with async hooks:
```
@task(show_return_value_in_logs=False)
async def load_xml_files(files):
import asyncio
from io import BytesIO
from more_itertools import chunked
from os import cpu_count
from tenacity import retry, stop_after_attempt, wait_fixed
from airflow.providers.sftp.hooks.sftp import SFTPClientPool
print("number of files:", len(files))
async with SFTPClientPool(sftp_conn_id=sftp_conn, pool_size=cpu_count())
as pool:
@retry(stop=stop_after_attempt(3), wait=wait_fixed(5))
async def download_file(file):
async with pool.get_sftp_client() as sftp:
print("downloading:", file)
buffer = BytesIO()
async with sftp.open(file, encoding=xml_encoding) as
remote_file:
data = await remote_file.read()
buffer.write(data.encode(xml_encoding))
buffer.seek(0)
return buffer
for batch in chunked(files, cpu_count() * 2):
tasks = [asyncio.create_task(download_file(f)) for f in batch]
# Wait for this batch to finish before starting the next
for task in asyncio.as_completed(tasks):
result = await task
# Do something with result or accumulate it and return it as
an XCom
```
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In case of fundamental code changes, an Airflow Improvement Proposal
([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvement+Proposals))
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In case of a new dependency, check compliance with the [ASF 3rd Party
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In case of backwards incompatible changes please leave a note in a
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