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from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.utils.decorators import apply_defaults
from airflow.exceptions import AirflowException
[docs]class SageMakerBaseSensor(BaseSensorOperator):
"""
Contains general sensor behavior for SageMaker.
Subclasses should implement get_sagemaker_response()
and state_from_response() methods.
Subclasses should also implement NON_TERMINAL_STATES and FAILED_STATE methods.
"""
@apply_defaults
def __init__(
self,
aws_conn_id='aws_default',
*args, **kwargs):
super(SageMakerBaseSensor, self).__init__(*args, **kwargs)
self.aws_conn_id = aws_conn_id
[docs] def poke(self, context):
response = self.get_sagemaker_response()
if not response['ResponseMetadata']['HTTPStatusCode'] == 200:
self.log.info('Bad HTTP response: %s', response)
return False
state = self.state_from_response(response)
self.log.info('Job currently %s', state)
if state in self.non_terminal_states():
return False
if state in self.failed_states():
failed_reason = self.get_failed_reason_from_response(response)
raise AirflowException('Sagemaker job failed for the following reason: %s'
% failed_reason)
return True
[docs] def non_terminal_states(self):
raise NotImplementedError('Please implement non_terminal_states() in subclass')
[docs] def failed_states(self):
raise NotImplementedError('Please implement failed_states() in subclass')
[docs] def get_sagemaker_response(self):
raise NotImplementedError('Please implement get_sagemaker_response() in subclass')
[docs] def get_failed_reason_from_response(self, response):
return 'Unknown'
[docs] def state_from_response(self, response):
raise NotImplementedError('Please implement state_from_response() in subclass')