What can an asynchronous web service be built on?

Question

API

You need to create an asynchronous client-server interaction. It is necessary that the client in the cycle does not knock and does not poll the service, but subscribes to the event. Those. the client knocks on the service and says who he is (login, password), the service authenticates him (issues a pass or ticket) and says, they say, if there is anything for you (the client), I will tell you. How can this be implemented using WSDL and SOAP? Are there Java frameworks with WS-Addressing or is it better to build web services on .NET. Please share your experience or thoughts on this.

Answer 1

I can’t speak for Java, although there will certainly be something you need there.
And for .NET, you can look at SignalR .

Answer 2

Qt, TCP and SOAP as message body format... will be no more difficult than in Java or .NET

Answer 3

Java + Spring Framework + Spring-ws.
static.springsource.org/spring-ws/site/reference/html/server.html#server-ws-addressing
+ recently described the creation of a simple web service,
habrahabr.ru/post/148403/ may come in handy