kafka-sink-connector

kafka-sink-connector is a Kafka Connect connector that reads JSON data from Apache Kafka and send JSON record to Another Kafka topic.

Features

• Sink Record to Another Kafka topic
• Data Filtering by JsonPath
• Sampling
• Timestamp parsing
• Message key parsing
• Additional producer option(linger.ms, batch.size)

Configuration Properties

Required	Name	Type	Description	Sample
O	topics	String	A list of Kafka topics that the sink connector watches.	my-topic
O	kafka.sink.topic	String	The Kafka topic name to which the sink connector writes.	relay-topic
O	kafka.sink.bootstrap	String	The Kafka bootstrap server to which the sink connector writes.	my-kafka:9092
O	kafka.filtering.condition	String	Filtering condition for value fields using json-path.	$.[?( !@.all )]
X	kafka.timestamp.enabled	Boolean	This feature is injects a Timestamp into the Kafka Record	true
X	kafka.timestamp.field	String	Location of the json field in the Timestamp to inject into the Record	@.timestamp
X	kafka.timestamp.format	String	Format of timestamps to inject into the Record	yyyyMMdd HHmmss SSS
X	kafka.sampling.enabled	Boolean	This feature enables whether sampling is applied.	true
X	kafka.sampling.percentage	String	Sampling percentage value	0.5
X	kafka.key.enabled	Boolean	This feature is injects a Message Key into the Kafka Record	true
X	kafka.key.field	String	Location of the json field in the Message Key to inject into the Record	@.name
X	kafka.producer.linger.ms	String	Producer linger.ms option	10
X	kafka.producer.batch.size	String	Producer batch.size option	100000

Configuration Example

Source Kafka (fruits topic)	→	kafka-sink-connector	→	Sink Kafka (red-color-fruit topic)
{ "color":"red", "name":"apple" } { "color":"yellow", "name":"banana" } { "color":"orange", "name":"tangerine" }	→	{ "name": "red-color-filtering-test", "config": { "connector.class": "com.kakao.connector.kafka.KafkaSinkConnector", "kafka.filtering.condition": "$.[?(@.color == 'red')]", "kafka.sink.bootstrap": "color-kafka:9092", "kafka.sink.topic": "red-color-fruit", "tasks.max": "1", "topics": "fruits" } }	→	{ "color":"red", "name":"apple" }

Build

$ git clone https://github.daumkakao.com/adrec/kafka-sink-connector.git
$ cd kafka-sink-connector
$ ./gradlew uberJar
$ ls build/libs 
kafka-sink-connector-1.0.jar

How to add kafka-sink-connector JAR file in Kafka Connect worker?

• Installing Connect Plugins : https://docs.confluent.io/kafka-connectors/self-managed/userguide.html#installing-kconnect-plugins
• plugin.path : https://kafka.apache.org/documentation/#connectconfigs_plugin.path

License

This software is licensed under the Apache 2 license, quoted below.

Copyright 2023 Kakao Corp. http://www.kakaocorp.com

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this project 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.