BAEL-4107: Spring MVC Async vs Spring WebFlux

spring-5-webflux/src/main/java/com/baeldung/spring/asyncvsflux/AsyncVsWebFluxApp.java

@@ -0,0 +1,11 @@
+package com.baeldung.spring.asyncvsflux;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class AsyncVsWebFluxApp {
+    public static void main(String[] args) {
+        SpringApplication.run(AsyncVsWebFluxApp.class, args);
+    }
+}

spring-5-webflux/src/main/java/com/baeldung/spring/asyncvsflux/WebFluxController.java

@@ -0,0 +1,17 @@
+package com.baeldung.spring.asyncvsflux;
+
+import java.time.Duration;
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+@RestController
+public class WebFluxController {
+
+    @GetMapping("/flux_result")
+    public Mono<String> getResult(ServerHttpRequest request) {
+       return Mono.defer(() -> Mono.just("Result is ready!"))
+         .delaySubscription(Duration.ofMillis(500));
+    }
+}

spring-5-webflux/src/main/java/com/baeldung/spring/asyncvsflux/WebFluxFilter.java

@@ -0,0 +1,20 @@
+package com.baeldung.spring.asyncvsflux;
+
+import java.time.Duration;
+import org.springframework.stereotype.Component;
+import org.springframework.web.server.ServerWebExchange;
+import org.springframework.web.server.WebFilterChain;
+import reactor.core.publisher.Mono;
+
+@Component
+public class WebFluxFilter implements org.springframework.web.server.WebFilter {
+
+    @Override
+    public Mono<Void> filter(ServerWebExchange serverWebExchange, WebFilterChain webFilterChain) {
+        return Mono
+          .delay(Duration.ofMillis(200))
+          .then(
+            webFilterChain.filter(serverWebExchange)
+          );
+    }
+}