airflow pig 源码
airflow pig 代码
文件路径：/airflow/providers/apache/pig/operators/pig.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
import re
from typing import TYPE_CHECKING, Any, Sequence
from airflow.models import BaseOperator
from airflow.providers.apache.pig.hooks.pig import PigCliHook
if TYPE_CHECKING:
from airflow.utils.context import Context
class PigOperator(BaseOperator):
"""
Executes pig script.
:param pig: the pig latin script to be executed. (templated)
:param pig_cli_conn_id: reference to the Hive database
:param pigparams_jinja_translate: when True, pig params-type templating
${var} gets translated into jinja-type templating {{ var }}. Note that
you may want to use this along with the
``DAG(user_defined_macros=myargs)`` parameter. View the DAG
object documentation for more details.
:param pig_opts: pig options, such as: -x tez, -useHCatalog, ...
"""
template_fields: Sequence[str] = ('pig',)
template_ext: Sequence[str] = (
'.pig',
'.piglatin',
)
ui_color = '#f0e4ec'
def __init__(
self,
*,
pig: str,
pig_cli_conn_id: str = 'pig_cli_default',
pigparams_jinja_translate: bool = False,
pig_opts: str | None = None,
**kwargs: Any,
) -> None:
super().__init__(**kwargs)
self.pigparams_jinja_translate = pigparams_jinja_translate
self.pig = pig
self.pig_cli_conn_id = pig_cli_conn_id
self.pig_opts = pig_opts
self.hook: PigCliHook | None = None
def prepare_template(self):
if self.pigparams_jinja_translate:
self.pig = re.sub(r"(\$([a-zA-Z_][a-zA-Z0-9_]*))", r"{{ \g<2> }}", self.pig)
def execute(self, context: Context):
self.log.info('Executing: %s', self.pig)
self.hook = PigCliHook(pig_cli_conn_id=self.pig_cli_conn_id)
self.hook.run_cli(pig=self.pig, pig_opts=self.pig_opts)
def on_kill(self):
self.hook.kill()
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