ebook-chat-app-spring-websocket-cassandra-redis-rabbitmq

Pro Java Clustering and Scalability: Building Real-Time Apps with Spring, Cassandra, Redis, WebSocket and RabbitMQ. Maintained by jorgeacetozi on GitHub, where it has earned 302 stars from the community.

It's actively developed around spring-boot, spring-websockets-stomp, cassandra, and is a solid reference for anyone building with these tools.