Pro Java Clustering and Scalability: Building Real-Time Apps with Spring, Cassandra, Redis, WebSocket and RabbitMQ

© Jorge Acetozi 2017

Jorge Acetozi, Pro Java Clustering and Scalability, https://doi.org/10.1007/978-1-4842-2985-9_13

13. Horizontally Scaling Stateful Web Applications

Jorge Acetozi¹ 

(1)São Paulo / SP, Brazil

Let’s forget the WebSocket technology for a while and think about traditional web applications. You have already learned about the request/response HTTP model, and you know that HTTP is stateless. This means that after a server gives a response to a request, it closes the TCP connection, and it doesn’t know anything about the client (not even if the client is going to make other requests) anymore. This might work in some cases, but think of an online store. How would the store be able to keep the shopping cart items across multiple requests ...