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https://issues.apache.org/jira/browse/AIRFLOW-6786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17234022#comment-17234022
]
ASF GitHub Bot commented on AIRFLOW-6786:
-----------------------------------------
mik-laj commented on a change in pull request #12388:
URL: https://github.com/apache/airflow/pull/12388#discussion_r525542613
##########
File path: airflow/providers/apache/kafka/hooks/kafka_producer.py
##########
@@ -0,0 +1,88 @@
+#
+# 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 kafka import KafkaProducer
+
+from airflow.hooks.base_hook import BaseHook
+
+
+class KafkaProducerHook(BaseHook):
+ """KafkaProducerHook Class."""
+
+ DEFAULT_HOST = 'localhost'
+ DEFAULT_PORT = 9092
+
+ def __init__(self, conn_id, topic):
+ super().__init__(None)
+ self.conn_id = conn_id
+ self._conn = None
+ self.server = None
+ self.consumer = None
+ self.producer = None
+ self.topic = topic
+
+ def get_conn(self) -> KafkaProducer:
+ """
+ Returns a Kafka Producer
+
+ :return:
+ A Kafka Producer object.
+ """
+ if not self._conn:
+ _conn = self.get_connection(self.conn_id)
+ service_options = _conn.extra_dejson
+ host = _conn.host or self.DEFAULT_HOST
+ port = _conn.port or self.DEFAULT_PORT
+
+ self.server = f"""{host}:{port}"""
+ self.consumer = KafkaProducer(bootstrap_servers=self.server,
**service_options)
+ return self.producer
+
+ def send_message(self, topic, value=None, key=None, partition=None,
timestamp_ms=None):
+ """
+ Sends a message on the specified topic and partition. Keyed
messages will be sent in order.
+
+ :param topic:
+ :param value:
+ :param key:
+ :param partition:
+ :param timestamp_ms:
+ :return:
+ """
+ producer = self.get_conn()
+ try:
+ future_record_metadata = producer.send(
+ topic, value=value, key=key, partition=partition,
timestamp_ms=timestamp_ms
+ )
+ finally:
+ producer.close()
+ return future_record_metadata
+
+ def __repr__(self):
+ """
+ A pretty version of the connection string.
+
+ :return:
+ A pretty version of the connection string.
+ """
+ connected = self.producer is not None
+ return '<KafkaProducerHook ' 'connected?=%s server=%s topic=%s>' % (
Review comment:
```suggestion
return '<KafkaProducerHook connected?=%s server=%s topic=%s>' % (
```
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> Adding KafkaConsumerHook, KafkaProducerHook, and KafkaSensor
> ------------------------------------------------------------
>
> Key: AIRFLOW-6786
> URL: https://issues.apache.org/jira/browse/AIRFLOW-6786
> Project: Apache Airflow
> Issue Type: New Feature
> Components: contrib, hooks
> Affects Versions: 1.10.9
> Reporter: Daniel Ferguson
> Assignee: Daniel Ferguson
> Priority: Minor
>
> Add the KafkaProducerHook.
> Add the KafkaConsumerHook.
> Add the KafkaSensor which listens to messages with a specific topic.
> Related Issue:
> #1311 (Pre-dates Jira Migration)
> Reminder to contributors:
> You must add an Apache License header to all new files
> Please squash your commits when possible and follow the 7 rules of good Git
> commits
> I am new to the community, I am not sure the files are at the right place or
> missing anything.
> The sensor could be used as the first node of a dag where the second node can
> be a TriggerDagRunOperator. The messages are polled in a batch and the dag
> runs are dynamically generated.
> Thanks!
> Note, as per denied PR [#1415|https://github.com/apache/airflow/pull/1415],
> it is important to mention these integrations are not suitable for
> low-latency/high-throughput/streaming. For reference, [#1415
> (comment)|https://github.com/apache/airflow/pull/1415#issuecomment-484429806].
> Co-authored-by: Dan Ferguson
> [[email protected]|mailto:[email protected]]
> Co-authored-by: YuanfΞi Zhu
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