https://github.com/joan38/kafka-streams-circe

Generic Serdes with Circe for Kafka Streams
https://github.com/joan38/kafka-streams-circe

Last synced: about 2 months ago
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Generic Serdes with Circe for Kafka Streams

• Host: GitHub
• URL: https://github.com/joan38/kafka-streams-circe
• Owner: joan38
• License: apache-2.0
• Created: 2018-04-30T12:14:16.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2022-07-06T17:20:00.000Z (over 2 years ago)
• Last Synced: 2024-10-22T04:50:19.990Z (2 months ago)
• Language: Scala
• Homepage:
• Size: 31.3 KB
• Stars: 28
• Watchers: 4
• Forks: 7
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Kafka Streams Circe

[![Latest version](https://index.scala-lang.org/joan38/kafka-streams-circe/kafka-streams-circe/latest.svg)](https://index.scala-lang.org/joan38/kafka-streams-circe/kafka-streams-circe)

Generic Serdes with [Circe](https://github.com/circe/circe) for [Kafka Streams](https://github.com/apache/kafka)

## Installation

[Mill](https://www.lihaoyi.com/mill):

```scala

ivy"com.goyeau::kafka-streams-circe:"

```

or

[SBT](https://www.scala-sbt.org):

```scala

"com.goyeau" %% "kafka-streams-circe" % ""

```

## Example

```scala

import org.apache.kafka.streams.scala.StreamsBuilder

import org.apache.kafka.streams.scala.ImplicitConversions._

import org.apache.kafka.streams.scala.Serdes._

import com.goyeau.kafka.streams.circe.CirceSerdes._

import io.circe.generic.auto._

case class Person(firstname: String, lastname: String, age: Int)

object Streams extends App {

  println("Starting streams")

  val streamsBuilder = new StreamsBuilder

  val testStream = streamsBuilder.stream[String, Person]("some-topic")

}

```

If you need to customize the json serialization, a custom implicit instance of `Printer` can be provided in scope.

For example, in the code below a custom printer is used to omit null values:

```scala

import org.apache.kafka.streams.scala.StreamsBuilder

import org.apache.kafka.streams.scala.ImplicitConversions._

import org.apache.kafka.streams.scala.Serdes._

import com.goyeau.kafka.streams.circe.CirceSerdes._

import io.circe.generic.auto._

case class Person(firstname: String, lastname: String, age: Int)

object Streams extends App {

  implicit val printer = Printer.noSpaces.copy(dropNullValues = true)

  val streamsBuilder = new StreamsBuilder

  val testStream = streamsBuilder.stream[String, Person]("some-topic")

}

```