airflow redis_publish 源码
airflow redis_publish 代码
文件路径：/airflow/providers/redis/operators/redis_publish.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
#
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# software distributed under the License is distributed on an
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# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
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from __future__ import annotations
from typing import TYPE_CHECKING, Sequence
from airflow.models import BaseOperator
from airflow.providers.redis.hooks.redis import RedisHook
if TYPE_CHECKING:
from airflow.utils.context import Context
class RedisPublishOperator(BaseOperator):
"""
Publish a message to Redis.
:param channel: redis channel to which the message is published (templated)
:param message: the message to publish (templated)
:param redis_conn_id: redis connection to use
"""
template_fields: Sequence[str] = ('channel', 'message')
def __init__(self, *, channel: str, message: str, redis_conn_id: str = 'redis_default', **kwargs) -> None:
super().__init__(**kwargs)
self.redis_conn_id = redis_conn_id
self.channel = channel
self.message = message
def execute(self, context: Context) -> None:
"""
Publish the message to Redis channel
:param context: the context object
"""
redis_hook = RedisHook(redis_conn_id=self.redis_conn_id)
self.log.info('Sending message %s to Redis on channel %s', self.message, self.channel)
result = redis_hook.get_conn().publish(channel=self.channel, message=self.message)
self.log.info('Result of publishing %s', result)
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