Source code for airflow.sensors.hive_partition_sensor

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from airflow.sensors.base_sensor_operator import BaseSensorOperator
from airflow.utils.decorators import apply_defaults

[docs]class HivePartitionSensor(BaseSensorOperator): """ Waits for a partition to show up in Hive. Note: Because ``partition`` supports general logical operators, it can be inefficient. Consider using NamedHivePartitionSensor instead if you don't need the full flexibility of HivePartitionSensor. :param table: The name of the table to wait for, supports the dot notation (my_database.my_table) :type table: string :param partition: The partition clause to wait for. This is passed as is to the metastore Thrift client ``get_partitions_by_filter`` method, and apparently supports SQL like notation as in ``ds='2015-01-01' AND type='value'`` and comparison operators as in ``"ds>=2015-01-01"`` :type partition: string :param metastore_conn_id: reference to the metastore thrift service connection id :type metastore_conn_id: str """ template_fields = ('schema', 'table', 'partition',) ui_color = '#C5CAE9' @apply_defaults def __init__(self, table, partition="ds='{{ ds }}'", metastore_conn_id='metastore_default', schema='default', poke_interval=60 * 3, *args, **kwargs): super(HivePartitionSensor, self).__init__( poke_interval=poke_interval, *args, **kwargs) if not partition: partition = "ds='{{ ds }}'" self.metastore_conn_id = metastore_conn_id self.table = table self.partition = partition self.schema = schema
[docs] def poke(self, context): if '.' in self.table: self.schema, self.table = self.table.split('.') 'Poking for table {self.schema}.{self.table}, ' 'partition {self.partition}'.format(**locals())) if not hasattr(self, 'hook'): from airflow.hooks.hive_hooks import HiveMetastoreHook self.hook = HiveMetastoreHook( metastore_conn_id=self.metastore_conn_id) return self.hook.check_for_partition( self.schema, self.table, self.partition)