airflow hive_partition 源码
airflow hive_partition 代码
文件路径：/airflow/providers/apache/hive/sensors/hive_partition.py
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations
from typing import TYPE_CHECKING, Any, Sequence
from airflow.providers.apache.hive.hooks.hive import HiveMetastoreHook
from airflow.sensors.base import BaseSensorOperator
if TYPE_CHECKING:
from airflow.utils.context import Context
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)
: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"``
:param metastore_conn_id: reference to the
:ref: `metastore thrift service connection id <howto/connection:hive_metastore>`
"""
template_fields: Sequence[str] = (
'schema',
'table',
'partition',
)
ui_color = '#C5CAE9'
def __init__(
self,
*,
table: str,
partition: str | None = "ds='{{ ds }}'",
metastore_conn_id: str = 'metastore_default',
schema: str = 'default',
poke_interval: int = 60 * 3,
**kwargs: Any,
):
super().__init__(poke_interval=poke_interval, **kwargs)
if not partition:
partition = "ds='{{ ds }}'"
self.metastore_conn_id = metastore_conn_id
self.table = table
self.partition = partition
self.schema = schema
def poke(self, context: Context) -> bool:
if '.' in self.table:
self.schema, self.table = self.table.split('.')
self.log.info('Poking for table %s.%s, partition %s', self.schema, self.table, self.partition)
if not hasattr(self, 'hook'):
hook = HiveMetastoreHook(metastore_conn_id=self.metastore_conn_id)
return hook.check_for_partition(self.schema, self.table, self.partition)
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