airflow filesystem 源码
airflow filesystem 代码
文件路径：/airflow/sensors/filesystem.py
#
# 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 datetime
import os
from glob import glob
from typing import Sequence
from airflow.hooks.filesystem import FSHook
from airflow.sensors.base import BaseSensorOperator
from airflow.utils.context import Context
class FileSensor(BaseSensorOperator):
"""
Waits for a file or folder to land in a filesystem.
If the path given is a directory then this sensor will only return true if
any files exist inside it (either directly, or within a subdirectory)
:param fs_conn_id: reference to the File (path)
connection id
:param filepath: File or folder name (relative to
the base path set within the connection), can be a glob.
:param recursive: when set to ``True``, enables recursive directory matching behavior of
``**`` in glob filepath parameter. Defaults to ``False``.
"""
template_fields: Sequence[str] = ('filepath',)
ui_color = '#91818a'
def __init__(self, *, filepath, fs_conn_id='fs_default', recursive=False, **kwargs):
super().__init__(**kwargs)
self.filepath = filepath
self.fs_conn_id = fs_conn_id
self.recursive = recursive
def poke(self, context: Context):
hook = FSHook(self.fs_conn_id)
basepath = hook.get_path()
full_path = os.path.join(basepath, self.filepath)
self.log.info('Poking for file %s', full_path)
for path in glob(full_path, recursive=self.recursive):
if os.path.isfile(path):
mod_time = datetime.datetime.fromtimestamp(os.path.getmtime(path)).strftime('%Y%m%d%H%M%S')
self.log.info('Found File %s last modified: %s', str(path), mod_time)
return True
for _, _, files in os.walk(path):
if len(files) > 0:
return True
return False
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