dstandish commented on code in PR #42455: URL: https://github.com/apache/airflow/pull/42455#discussion_r1775479710
########## airflow/api_connexion/endpoints/backfill_endpoint.py: ########## @@ -0,0 +1,181 @@ +# 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. + +from __future__ import annotations + +import logging +from typing import TYPE_CHECKING + +import pendulum +from flask import g +from sqlalchemy import select + +from airflow.api_connexion import security +from airflow.api_connexion.exceptions import Conflict, NotFound, PermissionDenied +from airflow.api_connexion.schemas.backfill_schema import ( + BackfillCollection, + backfill_collection_schema, + backfill_schema, +) +from airflow.models.backfill import Backfill +from airflow.models.serialized_dag import SerializedDagModel +from airflow.utils import timezone +from airflow.utils.session import NEW_SESSION, provide_session +from airflow.www.decorators import action_logging +from airflow.www.extensions.init_auth_manager import get_auth_manager + +if TYPE_CHECKING: + from sqlalchemy.orm import Session + + from airflow.api_connexion.types import APIResponse + +log = logging.getLogger(__name__) + +RESOURCE_EVENT_PREFIX = "dag" + + +@provide_session +def _create_backfill( + *, + dag_id, + from_date, + to_date, + max_active_runs=10, + reverse=False, + dag_run_conf: dict | None = None, + session: Session = NEW_SESSION, +): + serdag = session.get(SerializedDagModel, dag_id) + if not serdag: + raise NotFound(f"Could not find dag {dag_id}") + + from_date = pendulum.parse(from_date) + to_date = pendulum.parse(to_date) + br = Backfill( + dag_id=dag_id, + from_date=from_date, + to_date=to_date, + max_active_runs=max_active_runs, + dag_run_conf=dag_run_conf, + ) + session.add(br) + session.commit() + return br + + +def _has_access(dag_ids, methods): + if get_auth_manager().filter_permitted_dag_ids(dag_ids=dag_ids, methods=methods, user=g.user): + return True + return False + + +@security.requires_access_dag("GET") +@action_logging +@provide_session +def list_backfills(dag_id, session): + backfills = session.scalars(select(Backfill).where(Backfill.dag_id == dag_id)).all() + obj = BackfillCollection( + backfills=backfills, + total_entries=len(backfills), + ) + serialized = backfill_collection_schema.dump(obj) + return serialized + + +@security.requires_access_dag("GET") +@action_logging +@provide_session +def pause_backfill(backfill_id, session): + br = session.get(Backfill, backfill_id) + if not _has_access(dag_ids=[br.dag_id], methods="PUT"): + raise PermissionDenied() + if br.completed_at: + raise Conflict("Backfill is already completed.") + if br.is_paused is False: + br.is_paused = True + session.commit() + return backfill_schema.dump(br) + + +@security.requires_access_dag("GET") +@action_logging +@provide_session +def unpause_backfill(backfill_id, session): + br = session.get(Backfill, backfill_id) + if not _has_access(dag_ids=[br.dag_id], methods="PUT"): + raise PermissionDenied() + if br.completed_at: + raise Conflict("Backfill is already completed.") + if br.is_paused: + br.is_paused = False + session.commit() + return backfill_schema.dump(br) + + +@security.requires_access_dag("GET") +@action_logging +@provide_session +def cancel_backfill(backfill_id, session): + br: Backfill = session.get(Backfill, backfill_id) + if not _has_access(dag_ids=[br.dag_id], methods="PUT"): + raise PermissionDenied() + + if br.completed_at is not None: + raise Conflict("Backfill is already completed.") + + br.completed_at = timezone.utcnow() + + # first, pause + if not br.is_paused: + br.is_paused = True + session.commit() + return backfill_schema.dump(br) + + +@security.requires_access_dag("GET") +@action_logging +@provide_session +def get_backfill(backfill_id: int, session: Session = NEW_SESSION): + backfill = session.get(Backfill, backfill_id) + if backfill: + if not _has_access([backfill.dag_id], methods=["GET"]): + raise PermissionDenied() + return backfill_schema.dump(backfill) + raise NotFound("Backfill not found") + + +@security.requires_access_dag("PUT") +@action_logging +def create_backfill( + dag_id: str, + from_date: str, + to_date: str, + max_active_runs: int = 10, + reverse: bool = False, + dag_run_conf: dict | None = None, +) -> APIResponse: + backfill_obj = _create_backfill( + dag_id=dag_id, + from_date=from_date, + to_date=to_date, + max_active_runs=max_active_runs, + reverse=reverse, + dag_run_conf=dag_run_conf, + ) + if not backfill_obj: Review Comment: this works. it is equiv to `if backfill_obj is not None` -- This is an automated message from the Apache Git Service. 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