Apache Kafka - Real-time Stream Processing (Master Class) - Implementing Interactive Query Micro-service

The video tutorial explains how to implement an interactive query system using Kafka Streams. It covers setting up RPC endpoints, creating a REST service with Spark Java, and managing Kafka stream states. The tutorial also details building a query server to retrieve data from state stores, handling both local and remote data. Finally, it summarizes the steps and demonstrates the request-response process.

How does the application ensure that the query server is not active during inconsistent states?

What are the two utility functions needed for the query server, and what do they do?

What is the role of the metadata in retrieving data from the state store?

What steps are involved in implementing the query server?