Reactive Real-Time Notifications with SSE, Spring Boot, and Redis Pub/Sub
Briefly

The reactive approach for a real-time notification system efficiently handles a high volume of simultaneous requests, enabling optimal application scalability and resource utilization.
Server-Sent Events (SSE) enable servers to asynchronously send updates over a persistent connection, reducing latency and eliminating the need for repeated client requests.
Spring Boot Reactive and Spring WebFlux frameworks provide essential tools for developing real-time notification systems, leveraging asynchronous data flows to maximize efficiency.
Redis Pub/Sub acts as a message broker, allowing clients to subscribe to specific events and receive immediate notifications upon their occurrence.
Read at InfoQ
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