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import logging
from paramiko import SFTP_NO_SUCH_FILE
from airflow.contrib.hooks.sftp_hook import SFTPHook
from airflow.operators.sensors import BaseSensorOperator
from airflow.utils.decorators import apply_defaults
[docs]class SFTPSensor(BaseSensorOperator):
"""
Waits for a file or directory to be present on SFTP.
:param path: Remote file or directory path
:type path: str
:param sftp_conn_id: The connection to run the sensor against
:type sftp_conn_id: str
"""
template_fields = ('path',)
@apply_defaults
def __init__(self, path, sftp_conn_id='sftp_default', *args, **kwargs):
super(SFTPSensor, self).__init__(*args, **kwargs)
self.path = path
self.hook = SFTPHook(sftp_conn_id)
[docs] def poke(self, context):
logging.info('Poking for %s', self.path)
try:
self.hook.get_mod_time(self.path)
except IOError as e:
if e.errno != SFTP_NO_SUCH_FILE:
raise e
return False
self.hook.close_conn()
return True