project-reactor

we have a server to retrieve a OAUTH token, and the oauth token is added to each request via WebClient.filter method e.g webClient .mutate() .filter((request, next) -> tokenProvider.getBearerToken() .map(token -> ClientRequest.from(request) .headers(httpHeaders -> httpHeaders.set("Bearer", token)) .build()).flatMap(next::exchange)) .build(); TokenProvider.getBearerToken returns Mono<String> since it is a webclient request (this is cached) I want to have a retry functionality that on 401 error, will invalidate the token and try the request again I have this working like so webClient.post() .uri

CompletableFuture executes a task on a separate thread ( uses a thread-pool ) and provides a callback function. Let's say I have an API call in a CompletableFuture . Is that an API call blocking? Would the thread be blocked till it does not get a response from the API? ( I know main thread/tomcat thread will be non-blocking, but what about the thread on which CompletableFuture task is executing? ) Mono is completely non-blocking, as far as I know. Please shed some light on this and correct me if I am wrong. CompletableFuture is Async. But is it non-blocking? One which is true about

TL;DR; We are trying to design a WebSocket server using spring webflux WebSocket implementation. The server has usual HTTP server operations e.g. create/fetch/update/fetchall . Using WebSockets we were trying to expose one endpoint so the clients could leverage a single connection for all sort of operations, given WebSockets are meant for this purpose. Is it a right design with webflux and WebSockets? Long Version We are starting a project which is going to use reactive web sockets from spring-webflux . We need to build a reactive client library which can be used by consumers to connect to the

I've found a lot of answers regarding RxJava , but I want to understand how it works in Reactor. My current understanding is very vague, i tend to think of map as being synchronous and flatMap to be asynchronous but I can't really get my had around it. Here is an example: files.flatMap { it -> Mono.just(Paths.get(UPLOAD_ROOT, it.filename()).toFile()) .map {destFile -> destFile.createNewFile() destFile } .flatMap(it::transferTo) }.then() I have files (a Flux<FilePart> ) and i want to copy it to some UPLOAD_ROOT on the server. This example is taken from a book. I can change all the .map to

I have Spring Boot 2 web app in which I need to identify site visitor by cookie and gather page view stats. So I need to intercept every web request. The code I had to write is more complex than call back hell (the very problem Spring reactor was supposed to solve). Here is the code: package mypack.conf; import java.time.LocalDateTime; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.UUID; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.context