Streams

Last week I decided to dirty my hands with Kafka Streams. I wanted to write simple application with Kafka Streams more interesting than World Count. I decided to write a program that calculates top 5 using Kafka Streams. Imagine you have written a game, and you want to display top 5 users. You also need that calculating and displaying top 5 to be real time. You need whenever a user has hit a record, it automatically displays user record.