Write an app: | The Streams API of Apache Kafka is the easiest way to write mission-critical real-time applications and microservices with all the benefits of Kafka’s server-side cluster technology. It allows you to build standard Java or Scala applications that are elastic, highly scalable, and fault-tolerant, and don’t require a separate processing cluster technology. Applications can be deployed on containers, VMs, or bare-metal hardware, to the cloud or on-p