Source code for airflow.contrib.sensors.file_sensor

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import os
import stat

from airflow.contrib.hooks.fs_hook import FSHook
from airflow.sensors.base_sensor_operator 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) :type fs_conn_id: str """
[docs] template_fields = ('filepath',)
[docs] ui_color = '#91818a'
@apply_defaults def __init__(self, filepath, fs_conn_id='fs_default', *args, **kwargs): super(FileSensor, self).__init__(*args, **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) try: if stat.S_ISDIR(os.stat(full_path).st_mode): for root, dirs, files in os.walk(full_path): if len(files): return True else: # full_path was a file directly return True except OSError: return False return False