Source code for airflow.contrib.operators.redis_publish_operator
# -*- coding: utf-8 -*-
#
# 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 airflow.utils.decorators import apply_defaults
from airflow.contrib.hooks.redis_hook import RedisHook
from airflow.models import BaseOperator
[docs]class RedisPublishOperator(BaseOperator):
"""
Publish a message to Redis.
:param channel: redis channel to which the message is published (templated)
:type channel: str
:param message: the message to publish (templated)
:type message: str
:param redis_conn_id: redis connection to use
:type redis_conn_id: str
"""
[docs] template_fields = ('channel', 'message')
@apply_defaults
def __init__(
self,
channel,
message,
redis_conn_id='redis_default',
*args, **kwargs):
super(RedisPublishOperator, self).__init__(*args, **kwargs)
self.redis_conn_id = redis_conn_id
self.channel = channel
self.message = message
[docs] def execute(self, context):
"""
Publish the message to Redis channel
:param context: the context object
:type context: dict
"""
redis_hook = RedisHook(redis_conn_id=self.redis_conn_id)
self.log.info('Sending messsage %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)