turbaszek commented on a change in pull request #9631: URL: https://github.com/apache/airflow/pull/9631#discussion_r449521128
########## File path: airflow/task/context/current.py ########## @@ -0,0 +1,69 @@ +# 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. + +import contextlib +import logging +from typing import Any, Dict + +from airflow.exceptions import AirflowException + +_CURRENT_CONTEXT = [] +log = logging.getLogger(__name__) + + +@contextlib.contextmanager +def set_current_context(context: Dict[str, Any]): + """ + Sets the current execution context to the provided context object. + This method should be called once per Task execution, before calling operator.execute + """ + _CURRENT_CONTEXT.append(context) + try: + yield context + finally: + expected_state = _CURRENT_CONTEXT.pop() + if expected_state != context: + log.warning( + "Current context is not equal to the state at context stack. Expected=%s, got=%s", + context, + expected_state, + ) + + +def get_current_context() -> Dict[str, Any]: + """ + Obtain the execution context for the currently executing operator without + altering user method's signature. + This is the simplest method of retrieving the execution context dictionary. + ** Old style: + def my_task(**context): + ti = context["ti"] + ** New style: + from airflow.task.context import get_current_context + def my_task(): + context = get_current_context() + ti = context["ti"] Review comment: Probably it's good idea to extend `@task` docs with this ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
