Source code for airflow.sensors.filesystem

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import os
from glob import glob

from airflow.hooks.filesystem import FSHook
from airflow.sensors.base import BaseSensorOperator
from airflow.utils.decorators import apply_defaults


[docs]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 :type fs_conn_id: str :param filepath: File or folder name (relative to the base path set within the connection), can be a glob. :type filepath: str """
[docs] template_fields = ('filepath',)
[docs] ui_color = '#91818a'
@apply_defaults def __init__(self, *, filepath, fs_conn_id='fs_default', **kwargs): super().__init__(**kwargs) self.filepath = filepath self.fs_conn_id = fs_conn_id
[docs] def poke(self, 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): if os.path.isfile(path): return True for _, _, files in os.walk(full_path): if len(files) > 0: return True return False

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