Crossing the Streams – Joins in Apache Kafka - codecentric AG Blog : codecentric AG Blog
0 Posts Version 0.10.0 of the popular message broker Apache Kafka saw the introduction of Kafka Streams. In its initial release, the Streams-API enabled stateful and stateless Kafka-to-Kafka message processing using concepts such as map, flatMap, filter or groupBy that many developers are familiar with these days. In Kafka 0.10.1, it started to support "Interactive Queries", an API that allows querying stateful stream transformations without going through another Kafka topic. In this article, we will talk about a specific kind of streaming operation – the joining of streams. We will begin with a brief walkthrough of some core concepts. Then we will take a look at the kinds of joins that the Streams API permits. Following that, we'll walk through each possible join by looking at the output of an established example. At the end, you should be aware of what kinds of joins are possible in Kafka Streams and where the caveats lie.Read full article from Crossing the Streams – Joins in Apache Kafka - codecentric AG Blog : codecentric AG Blog
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