How to send a message to a distributed system websocket?

Question

Java

There is a system

Web socket client connects to some server, as the balancer says, for example server 1.
The operator connects to server 2. The operator needs to send a web socket message to the client. How to implement it?

Answer 1

You need to somehow implement the pub/sub mechanism . For example, through redis . All servers subscribe to a redis channel. One of the servers publishes a message to the redis channel. All servers receive the message and then send it to their websocket clients.
A similar implementation for the socket.io library can be found here /