Source code for airflow.contrib.sensors.qubole_sensor

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from qds_sdk.qubole import Qubole
from qds_sdk.sensors import FileSensor, PartitionSensor

from airflow.exceptions import AirflowException
from airflow.hooks.base_hook import BaseHook
from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.utils.decorators import apply_defaults


[docs]class QuboleSensor(BaseSensorOperator): """ Base class for all Qubole Sensors """
[docs] template_fields = ('data', 'qubole_conn_id')
[docs] template_ext = ('.txt',)
@apply_defaults def __init__(self, data, qubole_conn_id="qubole_default", *args, **kwargs): self.data = data self.qubole_conn_id = qubole_conn_id if 'poke_interval' in kwargs and kwargs['poke_interval'] < 5: raise AirflowException("Sorry, poke_interval can't be less than 5 sec for " "task '{0}' in dag '{1}'." .format(kwargs['task_id'], kwargs['dag'].dag_id)) super(QuboleSensor, self).__init__(*args, **kwargs)
[docs] def poke(self, context): conn = BaseHook.get_connection(self.qubole_conn_id) Qubole.configure(api_token=conn.password, api_url=conn.host) self.log.info('Poking: %s', self.data) status = False try: status = self.sensor_class.check(self.data) except Exception as e: self.log.exception(e) status = False self.log.info('Status of this Poke: %s', status) return status
[docs]class QuboleFileSensor(QuboleSensor): """ Wait for a file or folder to be present in cloud storage and check for its presence via QDS APIs :param qubole_conn_id: Connection id which consists of qds auth_token :type qubole_conn_id: str :param data: a JSON object containing payload, whose presence needs to be checked Check this `example <https://github.com/apache/airflow/blob/master\ /airflow/contrib/example_dags/example_qubole_sensor.py>`_ for sample payload structure. :type data: a JSON object .. note:: Both ``data`` and ``qubole_conn_id`` fields support templating. You can also use ``.txt`` files for template-driven use cases. """ @apply_defaults def __init__(self, *args, **kwargs): self.sensor_class = FileSensor super(QuboleFileSensor, self).__init__(*args, **kwargs)
[docs]class QubolePartitionSensor(QuboleSensor): """ Wait for a Hive partition to show up in QHS (Qubole Hive Service) and check for its presence via QDS APIs :param qubole_conn_id: Connection id which consists of qds auth_token :type qubole_conn_id: str :param data: a JSON object containing payload, whose presence needs to be checked. Check this `example <https://github.com/apache/airflow/blob/master\ /airflow/contrib/example_dags/example_qubole_sensor.py>`_ for sample payload structure. :type data: a JSON object .. note:: Both ``data`` and ``qubole_conn_id`` fields support templating. You can also use ``.txt`` files for template-driven use cases. """ @apply_defaults def __init__(self, *args, **kwargs): self.sensor_class = PartitionSensor super(QubolePartitionSensor, self).__init__(*args, **kwargs)