mp-websocket | 小程序websocket | Websocket library

I've read all questions about "cannot find symbol" maven error, but I guess they are not appropriate for me.

First of all, I developed an educational project using Eclipse. It's a simple chat and it's accessible on github. It compiles and runs fine, but now I need to compile it with no Eclipse but Maven. I run mvn clean, mvn validate (both successful). Then mvn compile and I get errors:

Sample project available on Github: https://github.com/codependent/rsocket-rating-service

A Spring Boot RSocket server message mapping expects a requestResponse request, returning a simple POJO:

I am following the quick-start guide on Spring websocket with sockJs and Stomp here: https://spring.io/guides/gs/messaging-stomp-websocket/

At this point, my code looks like to one from guide and works as intended. I have a controller class with a method accepting incoming messages and sending them back to all who subscribed on the topic.

What I want to do, is to change the code, so my @MessageMapping annotated method sends response to all subscribers excluding the one who send the message to the controller in the first place (because the sender is also subscribed to the same topic, but i dont want the sender to keep receiving messages it send itself, it is kind of a loop I guess).

I have seen many docs describing how to send a message to a single subscriber, but have not yet seen on describing how to send to all but one - the initial message sender.

Is there any built-in way to do this easily in Spring websocket?

In my Spring-Boot application, js and css files do not work, it says 404 not found.

My html-page includes the following:

CLARIFICATION:

Thanks to @JustinBertram comment I realized that this question does not make sense.

STOMP protocol does not support selectors by itself, you have to use brokers such as ActiveMQ that implement it. STOMP supports headers that can be used by brokers for filtering messages by selectors.

In my case, I'm not using any broker, just frontend with Angular + Stomp + SocksJS and backend with Spring Boot, so I can't use selectors.

The documentation of STOMP protocol does not make this clear to me and I got confused. See these references:

the specification:

Stomp brokers may support the selector header which allows you to specify an SQL 92 selector on the message headers which acts as a filter for content based routing.

this article:

The subscribe() method takes an optional headers argument to specify additional headers when subscribing to a destination:

...

I updated my project from Spring Boot 1.5.6.RELEASE to 2.2.5.RELEASE and now I get an error claiming that the web server cannot be started because org.apache.tomcat.util.modeler.Registry.disableRegistry() cannot be found. This is a call made by Spring and it's not under my control. I have as dependencies org.apache.tomcat tomcat-servlet-api and org.apache.tomcat tomcat-catalina version 9.0.33, which are pretty new.

The error message itself seems very verbose but I don't really understand what am I supposed to do. I don't think it's my job to tamper with the class path.

I set up a WebSocket with spring decribed in this tutorial: https://spring.io/guides/gs/messaging-stomp-websocket/. What i need is that my Server send out a message to specific users every 5 seconds. So i first made this:

I'm writing simple Stomp Websocket application with Spring, and clients are both web (JS), and Mobile (ios, android). From JS code client connecting over SockJS, while mobile clients are using plain websocket connection behind SockJS. The issue is that behaviour in my ChannelInterceptor where I'm checking authentication, is completely different for different type of connections. I can't make it work the same for every client. Let me briefly give some code behind it and explain by example: Websocket starter was taken from Spring example here: https://github.com/spring-guides/gs-messaging-stomp-websocket.git

Websocket Config:

I referred to this spring boot doc to create web socket in spring boot.

I used stompjs and sockjs-client