ksqlDB is the Kafka native database for stream processing applications that streamlines to build stream processing applications with a SQL like interface.

Kafka Streams technology enables to implement Microservices Architecture (MSA) compliant stream processing/event streaming applications using Apache Kafka as a data backbone with all of the scalability and availability features of Kafka cluster.

... Another interpretation of this statement would be the importance of fulfilling the needs with the right application capabilities that turns data into most meaningful asset nowadays, aka information. Unless underpinned with right technology stack it is very hard to lay the foundation for a solid and sustainable enterprise architecture. As an event streaming platform evolved from a publish-subscribe messaging system, Apache Kafka manifests itself as a technology to collect, process, store and data at scale in a performant and reliable way.

Until recently, enterprise grade applications hosted on tens of servers, respond in seconds and need hours of offline maintenance, and they are subject to gigabytes of data. Whereas due to high utilization rate, data traffic throughout digital channels to servers reached level of petabytes. To meet these demands organizations need systems that are more robust, more resilient, and more flexible. So today’s applications are running on lots of platforms from mobile devices to cloud-based virtual servers that have thousands of multi-core processors. In addition, a paradigm emerged in systems domain began to take more place in technology architecture-Reactive Systems

The decoupling of identity source and the application requires a new way to exchange the authentication and authorization information between these systems. An answer to this problem is OAuth which introduces a way to use a digital token as a key to access the APIs exposed by these applications. As OAuth specification mostly tried to address authorization of access requests since day 1 another specification named as OIDC (OpenID Connect) introduced as an authentication layer on top of OAuth.