Source code for airflow.contrib.sensors.emr_base_sensor

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from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.utils import apply_defaults
from airflow.exceptions import AirflowException

[docs]class EmrBaseSensor(BaseSensorOperator): """ Contains general sensor behavior for EMR. Subclasses should implement get_emr_response() and state_from_response() methods. Subclasses should also implement NON_TERMINAL_STATES and FAILED_STATE constants. """ ui_color = '#66c3ff' @apply_defaults def __init__( self, aws_conn_id='aws_default', *args, **kwargs): super(EmrBaseSensor, self).__init__(*args, **kwargs) self.aws_conn_id = aws_conn_id
[docs] def poke(self, context): response = self.get_emr_response() if not response['ResponseMetadata']['HTTPStatusCode'] == 200:'Bad HTTP response: %s', response) return False state = self.state_from_response(response)'Job flow currently %s', state) if state in self.NON_TERMINAL_STATES: return False if state in self.FAILED_STATE: raise AirflowException('EMR job failed') return True