Source code for airflow.contrib.sensors.aws_glue_catalog_partition_sensor

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

[docs]class AwsGlueCatalogPartitionSensor(BaseSensorOperator): """ Waits for a partition to show up in AWS Glue Catalog. :param table_name: The name of the table to wait for, supports the dot notation (my_database.my_table) :type table_name: str :param expression: The partition clause to wait for. This is passed as is to the AWS Glue Catalog API's get_partitions function, and supports SQL like notation as in ``ds='2015-01-01' AND type='value'`` and comparison operators as in ``"ds>=2015-01-01"``. See #aws-glue-api-catalog-partitions-GetPartitions :type expression: str :param aws_conn_id: ID of the Airflow connection where credentials and extra configuration are stored :type aws_conn_id: str :param region_name: Optional aws region name (example: us-east-1). Uses region from connection if not specified. :type region_name: str :param database_name: The name of the catalog database where the partitions reside. :type database_name: str :param poke_interval: Time in seconds that the job should wait in between each tries :type poke_interval: int """
[docs] template_fields = ('database_name', 'table_name', 'expression',)
[docs] ui_color = '#C5CAE9'
@apply_defaults def __init__(self, table_name, expression="ds='{{ ds }}'", aws_conn_id='aws_default', region_name=None, database_name='default', poke_interval=60 * 3, *args, **kwargs): super(AwsGlueCatalogPartitionSensor, self).__init__( poke_interval=poke_interval, *args, **kwargs) self.aws_conn_id = aws_conn_id self.region_name = region_name self.table_name = table_name self.expression = expression self.database_name = database_name
[docs] def poke(self, context): """ Checks for existence of the partition in the AWS Glue Catalog table """ if '.' in self.table_name: self.database_name, self.table_name = self.table_name.split('.') 'Poking for table %s. %s, expression %s', self.database_name, self.table_name, self.expression ) return self.get_hook().check_for_partition( self.database_name, self.table_name, self.expression)
[docs] def get_hook(self): """ Gets the AwsGlueCatalogHook """ if not hasattr(self, 'hook'): from airflow.contrib.hooks.aws_glue_catalog_hook import AwsGlueCatalogHook self.hook = AwsGlueCatalogHook( aws_conn_id=self.aws_conn_id, region_name=self.region_name) return self.hook

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