Added Simple Reactive Event Server and Client Example

spring-5-reactive-client/src/test/java/com/baeldung/reactive/ReactiveEventClient.java

@@ -0,0 +1,29 @@
+package com.baeldung.reactive;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Flux;
+
+@SpringBootApplication
+public class ReactiveEventClient implements CommandLineRunner {
+    public static void main(String[] args) {
+        System.setProperty("server.port","8090");
+        SpringApplication.run(ReactiveEventClient.class, args);
+    }
+
+    @Override
+    public void run(String... args) throws Exception {
+        WebClient webclient = WebClient.builder()
+          .defaultHeader(HttpHeaders.ACCEPT, MediaType.TEXT_EVENT_STREAM_VALUE)
+          .baseUrl("http://localhost:8080/events")
+          .build();
+
+        webclient.get().uri("/stream/").header(HttpHeaders.CONTENT_TYPE,MediaType.TEXT_HTML.toString())
+          .retrieve().bodyToFlux(String.class)
+          .subscribe(System.out::println);
+    }
+}

spring-5-reactive/src/main/java/com/baeldung/reactive/controller/ReactiveEventServer.java

@@ -0,0 +1,21 @@
+package com.baeldung.reactive.controller;
+
+
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+
+import java.time.Duration;
+
+
+@RestController
+@RequestMapping("/events")
+public class ReactiveEventServer {
+
+    @GetMapping(path = "/stream/" , produces=MediaType.TEXT_EVENT_STREAM_VALUE)
+    public Flux<String> eventStream() {
+        return  Flux.interval(Duration.ofSeconds(1)).map(tick -> {return "Event:" + tick;});
+    }
+}