move to reactive, extract mongodb ex

spring-5-mongodb/.gitignore

@@ -0,0 +1,12 @@
+#folders#
+.idea
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

spring-5-mongodb/README.md

@@ -0,0 +1,20 @@
+## Spring REST Example Project
+
+### The Course
+The "REST With Spring" Classes: http://bit.ly/restwithspring
+
+### Relevant Articles
+
+- [Concurrent Test Execution in Spring 5](http://www.baeldung.com/spring-5-concurrent-tests)
+- [Introduction to the Functional Web Framework in Spring 5](http://www.baeldung.com/spring-5-functional-web)
+- [Exploring the Spring 5 MVC URL Matching Improvements](http://www.baeldung.com/spring-5-mvc-url-matching)
+- [Spring 5 WebClient](http://www.baeldung.com/spring-5-webclient)
+- [Spring 5 Functional Bean Registration](http://www.baeldung.com/spring-5-functional-beans)
+- [The SpringJUnitConfig and SpringJUnitWebConfig Annotations in Spring 5](http://www.baeldung.com/spring-5-junit-config)
+- [Spring Security 5 for Reactive Applications](http://www.baeldung.com/spring-security-5-reactive)
+- [Spring 5 Testing with @EnabledIf Annotation](https://github.com/eugenp/tutorials/tree/master/spring-5)
+- [Reactive WebSockets with Spring 5](http://www.baeldung.com/spring-5-reactive-websockets)
+- [Spring Boot Actuator](http://www.baeldung.com/spring-boot-actuators)
+- [Spring Webflux Filters](http://www.baeldung.com/spring-webflux-filters)
+- [Reactive Flow with MongoDB, Kotlin, and Spring WebFlux](http://www.baeldung.com/kotlin-mongodb-spring-webflux)
+- [Spring Data Reactive Repositories with MongoDB](http://www.baeldung.com/spring-data-mongodb-reactive)

spring-5-mongodb/pom.xml

@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.baeldung</groupId>
+    <artifactId>spring-5-mongodb</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>spring-5-mongodb</name>
+    <description>spring 5 mongodb sample project</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-tomcat</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectreactor</groupId>
+            <artifactId>reactor-spring</artifactId>
+            <version>${reactor-spring.version}</version>
+        </dependency>
+        <!-- utils -->
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+        </dependency>
+
+        <!-- runtime and test scoped -->
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-surefire-provider</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>de.flapdoodle.embed</groupId>
+            <artifactId>de.flapdoodle.embed.mongo</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.reactivex.rxjava2</groupId>
+            <artifactId>rxjava</artifactId>
+            <version>${rxjava-version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.projectreactor</groupId>
+            <artifactId>reactor-test</artifactId>
+            <version>${project-reactor-test}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <mainClass>com.baeldung.reactive.Spring5ReactiveApplication</mainClass>
+                    <layout>JAR</layout>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <forkCount>3</forkCount>
+                    <reuseForks>true</reuseForks>
+                    <parallel>methods</parallel>
+                    <useUnlimitedThreads>true</useUnlimitedThreads>
+                    <excludes>
+                        <exclude>**/*IntegrationTest.java</exclude>
+                        <exclude>**/*IntTest.java</exclude>
+                        <exclude>**/*LiveTest.java</exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <junit.platform.version>1.0.0</junit.platform.version>
+        <junit.jupiter.version>5.0.2</junit.jupiter.version>
+        <maven-surefire-plugin.version>2.20</maven-surefire-plugin.version>
+        <reactor-spring.version>1.0.1.RELEASE</reactor-spring.version>
+        <rxjava-version>2.1.12</rxjava-version>
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <project-reactor-test>3.1.6.RELEASE</project-reactor-test>
+          <johnzon.version>1.1.3</johnzon.version>
+        <jsonb-api.version>1.0</jsonb-api.version>
+        <geronimo-json_1.1_spec.version>1.0</geronimo-json_1.1_spec.version>
+    </properties>
+
+</project>

spring-5-mongodb/src/main/java/com/baeldung/reactive/Spring5ReactiveApplication.java

@@ -0,0 +1,25 @@
+package com.baeldung.reactive;
+
+import com.mongodb.reactivestreams.client.MongoClient;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.mongodb.core.ReactiveMongoTemplate;
+
+@SpringBootApplication
+public class Spring5ReactiveApplication{
+
+    public static void main(String[] args) {
+        SpringApplication.run(Spring5ReactiveApplication.class, args);
+    }
+
+    @Autowired
+    MongoClient mongoClient;
+
+    @Bean
+    public ReactiveMongoTemplate reactiveMongoTemplate() {
+        return new ReactiveMongoTemplate(mongoClient, "test");
+    }
+
+}

spring-5-mongodb/src/main/resources/application.properties

@@ -0,0 +1,5 @@
+logging.level.root=INFO
+
+management.endpoints.web.exposure.include.=*
+
+info.app.name=Spring Boot 2 actuator Application

spring-5-mongodb/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+         version="3.1">
+
+    <display-name>Spring Functional Application</display-name>
+
+    <servlet>
+        <servlet-name>functional</servlet-name>
+        <servlet-class>com.baeldung.functional.RootServlet</servlet-class>
+        <load-on-startup>1</load-on-startup>
+        <async-supported>true</async-supported>
+    </servlet>
+    <servlet-mapping>
+        <servlet-name>functional</servlet-name>
+        <url-pattern>/</url-pattern>
+    </servlet-mapping>
+
+
+</web-app>

spring-5-reactive/pom.xml

@@ -127,15 +127,6 @@
             <artifactId>commons-lang3</artifactId>
         </dependency>
 
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>de.flapdoodle.embed</groupId>
-            <artifactId>de.flapdoodle.embed.mongo</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>io.reactivex.rxjava2</groupId>
             <artifactId>rxjava</artifactId>

spring-5-reactive/src/main/java/com/baeldung/functional/Actor.java

@@ -0,0 +1,23 @@
+package com.baeldung.functional;
+
+class Actor {
+    private String firstname;
+    private String lastname;
+
+    public Actor() {
+    }
+
+    public Actor(String firstname, String lastname) {
+        this.firstname = firstname;
+        this.lastname = lastname;
+    }
+
+    public String getFirstname() {
+        return firstname;
+    }
+
+    public String getLastname() {
+        return lastname;
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/functional/FormHandler.java

@@ -0,0 +1,41 @@
+package com.baeldung.functional;
+
+import org.springframework.core.io.buffer.DataBuffer;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.reactive.function.server.ServerRequest;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.springframework.web.reactive.function.BodyExtractors.toDataBuffers;
+import static org.springframework.web.reactive.function.BodyExtractors.toFormData;
+import static org.springframework.web.reactive.function.BodyInserters.fromObject;
+import static org.springframework.web.reactive.function.server.ServerResponse.ok;
+
+public class FormHandler {
+
+    Mono<ServerResponse> handleLogin(ServerRequest request) {
+        return request.body(toFormData())
+            .map(MultiValueMap::toSingleValueMap)
+            .filter(formData -> "baeldung".equals(formData.get("user")))
+            .filter(formData -> "you_know_what_to_do".equals(formData.get("token")))
+            .flatMap(formData -> ok().body(Mono.just("welcome back!"), String.class))
+            .switchIfEmpty(ServerResponse.badRequest()
+                .build());
+    }
+
+    Mono<ServerResponse> handleUpload(ServerRequest request) {
+        return request.body(toDataBuffers())
+            .collectList()
+            .flatMap(dataBuffers -> ok().body(fromObject(extractData(dataBuffers).toString())));
+    }
+
+    private AtomicLong extractData(List<DataBuffer> dataBuffers) {
+        AtomicLong atomicLong = new AtomicLong(0);
+        dataBuffers.forEach(d -> atomicLong.addAndGet(d.asByteBuffer()
+            .array().length));
+        return atomicLong;
+    }
+}

spring-5-reactive/src/main/java/com/baeldung/functional/FunctionalSpringBootApplication.java

@@ -0,0 +1,87 @@
+package com.baeldung.functional;
+
+import static org.springframework.web.reactive.function.BodyInserters.fromObject;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RequestPredicates.path;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+import static org.springframework.web.reactive.function.server.RouterFunctions.toHttpHandler;
+import static org.springframework.web.reactive.function.server.ServerResponse.ok;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.ServletRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.RouterFunctions;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import org.springframework.web.server.WebHandler;
+import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
+
+import reactor.core.publisher.Flux;
+
+@SpringBootApplication
+@ComponentScan(basePackages = { "com.baeldung.functional" })
+public class FunctionalSpringBootApplication {
+
+    private static final Actor BRAD_PITT = new Actor("Brad", "Pitt");
+    private static final Actor TOM_HANKS = new Actor("Tom", "Hanks");
+    private static final List<Actor> actors = new CopyOnWriteArrayList<>(Arrays.asList(BRAD_PITT, TOM_HANKS));
+
+    private RouterFunction<ServerResponse> routingFunction() {
+        FormHandler formHandler = new FormHandler();
+
+        RouterFunction<ServerResponse> restfulRouter = route(GET("/"), serverRequest -> ok().body(Flux.fromIterable(actors), Actor.class)).andRoute(POST("/"), serverRequest -> serverRequest.bodyToMono(Actor.class)
+            .doOnNext(actors::add)
+            .then(ok().build()));
+
+        return route(GET("/test"), serverRequest -> ok().body(fromObject("helloworld"))).andRoute(POST("/login"), formHandler::handleLogin)
+            .andRoute(POST("/upload"), formHandler::handleUpload)
+            .and(RouterFunctions.resources("/files/**", new ClassPathResource("files/")))
+            .andNest(path("/actor"), restfulRouter)
+            .filter((request, next) -> {
+                System.out.println("Before handler invocation: " + request.path());
+                return next.handle(request);
+            });
+    }
+
+    @Bean
+    public ServletRegistrationBean servletRegistrationBean() throws Exception {
+        HttpHandler httpHandler = WebHttpHandlerBuilder.webHandler((WebHandler) toHttpHandler(routingFunction()))
+            .filter(new IndexRewriteFilter())
+            .build();
+        ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(new RootServlet(httpHandler), "/");
+        registrationBean.setLoadOnStartup(1);
+        registrationBean.setAsyncSupported(true);
+        return registrationBean;
+    }
+
+    @Configuration
+    @EnableWebSecurity
+    @Profile("!https")
+    static class SecurityConfig extends WebSecurityConfigurerAdapter {
+        @Override
+        protected void configure(final HttpSecurity http) throws Exception {
+            http.authorizeRequests()
+                .anyRequest()
+                .permitAll();
+        }
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(FunctionalSpringBootApplication.class, args);
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/functional/FunctionalWebApplication.java

@@ -0,0 +1,80 @@
+package com.baeldung.functional;
+
+import static org.springframework.web.reactive.function.BodyInserters.fromObject;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RequestPredicates.path;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+import static org.springframework.web.reactive.function.server.RouterFunctions.toHttpHandler;
+import static org.springframework.web.reactive.function.server.ServerResponse.ok;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import org.apache.catalina.Context;
+import org.apache.catalina.startup.Tomcat;
+import org.springframework.boot.web.embedded.tomcat.TomcatWebServer;
+import org.springframework.boot.web.server.WebServer;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.http.server.reactive.ServletHttpHandlerAdapter;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.RouterFunctions;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import org.springframework.web.server.WebHandler;
+import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
+
+import reactor.core.publisher.Flux;
+
+public class FunctionalWebApplication {
+
+    private static final Actor BRAD_PITT = new Actor("Brad", "Pitt");
+    private static final Actor TOM_HANKS = new Actor("Tom", "Hanks");
+    private static final List<Actor> actors = new CopyOnWriteArrayList<>(Arrays.asList(BRAD_PITT, TOM_HANKS));
+
+    private RouterFunction<ServerResponse> routingFunction() {
+        FormHandler formHandler = new FormHandler();
+
+        RouterFunction<ServerResponse> restfulRouter = route(GET("/"), serverRequest -> ok().body(Flux.fromIterable(actors), Actor.class)).andRoute(POST("/"), serverRequest -> serverRequest.bodyToMono(Actor.class)
+            .doOnNext(actors::add)
+            .then(ok().build()));
+
+        return route(GET("/test"), serverRequest -> ok().body(fromObject("helloworld"))).andRoute(POST("/login"), formHandler::handleLogin)
+            .andRoute(POST("/upload"), formHandler::handleUpload)
+            .and(RouterFunctions.resources("/files/**", new ClassPathResource("files/")))
+            .andNest(path("/actor"), restfulRouter)
+            .filter((request, next) -> {
+                System.out.println("Before handler invocation: " + request.path());
+                return next.handle(request);
+            });
+    }
+
+    WebServer start() throws Exception {
+        WebHandler webHandler = (WebHandler) toHttpHandler(routingFunction());
+        HttpHandler httpHandler = WebHttpHandlerBuilder.webHandler(webHandler)
+            .filter(new IndexRewriteFilter())
+            .build();
+
+        Tomcat tomcat = new Tomcat();
+        tomcat.setHostname("localhost");
+        tomcat.setPort(9090);
+        Context rootContext = tomcat.addContext("", System.getProperty("java.io.tmpdir"));
+        ServletHttpHandlerAdapter servlet = new ServletHttpHandlerAdapter(httpHandler);
+        Tomcat.addServlet(rootContext, "httpHandlerServlet", servlet);
+        rootContext.addServletMappingDecoded("/", "httpHandlerServlet");
+
+        TomcatWebServer server = new TomcatWebServer(tomcat);
+        server.start();
+        return server;
+
+    }
+
+    public static void main(String[] args) {
+        try {
+            new FunctionalWebApplication().start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

spring-5-reactive/src/main/java/com/baeldung/functional/IndexRewriteFilter.java

@@ -0,0 +1,25 @@
+package com.baeldung.functional;
+
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.web.server.ServerWebExchange;
+import org.springframework.web.server.WebFilter;
+import org.springframework.web.server.WebFilterChain;
+import reactor.core.publisher.Mono;
+
+class IndexRewriteFilter implements WebFilter {
+
+    @Override
+    public Mono<Void> filter(ServerWebExchange serverWebExchange, WebFilterChain webFilterChain) {
+        ServerHttpRequest request = serverWebExchange.getRequest();
+        if (request.getURI()
+            .getPath()
+            .equals("/")) {
+            return webFilterChain.filter(serverWebExchange.mutate()
+                .request(builder -> builder.method(request.getMethod())
+                    .path("/test"))
+                .build());
+        }
+        return webFilterChain.filter(serverWebExchange);
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/functional/MyService.java

@@ -0,0 +1,11 @@
+package com.baeldung.functional;
+
+import java.util.Random;
+
+public class MyService {
+
+    public int getRandomNumber() {
+        return (new Random().nextInt(10));
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/functional/RootServlet.java

@@ -0,0 +1,82 @@
+package com.baeldung.functional;
+
+import static org.springframework.web.reactive.function.BodyExtractors.toDataBuffers;
+import static org.springframework.web.reactive.function.BodyExtractors.toFormData;
+import static org.springframework.web.reactive.function.BodyInserters.fromObject;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RequestPredicates.path;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+import static org.springframework.web.reactive.function.server.RouterFunctions.toHttpHandler;
+import static org.springframework.web.reactive.function.server.ServerResponse.ok;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.atomic.AtomicLong;
+
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.http.server.reactive.ServletHttpHandlerAdapter;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.RouterFunctions;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import org.springframework.web.server.WebHandler;
+import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
+
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+public class RootServlet extends ServletHttpHandlerAdapter {
+
+    public RootServlet() {
+        this(WebHttpHandlerBuilder.webHandler((WebHandler) toHttpHandler(routingFunction()))
+            .filter(new IndexRewriteFilter())
+            .build());
+    }
+
+    RootServlet(HttpHandler httpHandler) {
+        super(httpHandler);
+    }
+
+    private static final Actor BRAD_PITT = new Actor("Brad", "Pitt");
+    private static final Actor TOM_HANKS = new Actor("Tom", "Hanks");
+    private static final List<Actor> actors = new CopyOnWriteArrayList<>(Arrays.asList(BRAD_PITT, TOM_HANKS));
+
+    private static RouterFunction<?> routingFunction() {
+
+        return route(GET("/test"), serverRequest -> ok().body(fromObject("helloworld"))).andRoute(POST("/login"), serverRequest -> serverRequest.body(toFormData())
+            .map(MultiValueMap::toSingleValueMap)
+            .map(formData -> {
+                System.out.println("form data: " + formData.toString());
+                if ("baeldung".equals(formData.get("user")) && "you_know_what_to_do".equals(formData.get("token"))) {
+                    return ok().body(Mono.just("welcome back!"), String.class)
+                        .block();
+                }
+                return ServerResponse.badRequest()
+                    .build()
+                    .block();
+            }))
+            .andRoute(POST("/upload"), serverRequest -> serverRequest.body(toDataBuffers())
+                .collectList()
+                .map(dataBuffers -> {
+                    AtomicLong atomicLong = new AtomicLong(0);
+                    dataBuffers.forEach(d -> atomicLong.addAndGet(d.asByteBuffer()
+                        .array().length));
+                    System.out.println("data length:" + atomicLong.get());
+                    return ok().body(fromObject(atomicLong.toString()))
+                        .block();
+                }))
+            .and(RouterFunctions.resources("/files/**", new ClassPathResource("files/")))
+            .andNest(path("/actor"), route(GET("/"), serverRequest -> ok().body(Flux.fromIterable(actors), Actor.class)).andRoute(POST("/"), serverRequest -> serverRequest.bodyToMono(Actor.class)
+                .doOnNext(actors::add)
+                .then(ok().build())))
+            .filter((request, next) -> {
+                System.out.println("Before handler invocation: " + request.path());
+                return next.handle(request);
+            });
+
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/reactive/Spring5ReactiveApplication.java

@@ -1,11 +1,9 @@
 package com.baeldung.reactive;
 
-import com.mongodb.reactivestreams.client.MongoClient;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
-import org.springframework.data.mongodb.core.ReactiveMongoTemplate;
 
 @SpringBootApplication
 public class Spring5ReactiveApplication{
@@ -14,12 +12,4 @@ public class Spring5ReactiveApplication{
         SpringApplication.run(Spring5ReactiveApplication.class, args);
     }
 
-    @Autowired
-    MongoClient mongoClient;
-
-    @Bean
-    public ReactiveMongoTemplate reactiveMongoTemplate() {
-        return new ReactiveMongoTemplate(mongoClient, "test");
-    }
-
 }

spring-5-reactive/src/main/java/com/baeldung/reactive/SpringSecurity5Application.java

@@ -0,0 +1,34 @@
+package com.baeldung.reactive;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.http.server.reactive.ReactorHttpHandlerAdapter;
+import org.springframework.web.reactive.config.EnableWebFlux;
+import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
+import reactor.ipc.netty.NettyContext;
+import reactor.ipc.netty.http.server.HttpServer;
+
+@ComponentScan(basePackages = {"com.baeldung.security"})
+@EnableWebFlux
+public class SpringSecurity5Application {
+
+    public static void main(String[] args) {
+        try (AnnotationConfigApplicationContext context =
+                     new AnnotationConfigApplicationContext(SpringSecurity5Application.class)) {
+            context.getBean(NettyContext.class).onClose().block();
+        }
+    }
+
+    @Bean
+    public NettyContext nettyContext(ApplicationContext context) {
+        HttpHandler handler = WebHttpHandlerBuilder.applicationContext(context)
+                .build();
+        ReactorHttpHandlerAdapter adapter = new ReactorHttpHandlerAdapter(handler);
+        HttpServer httpServer = HttpServer.create("localhost", 8080);
+        return httpServer.newHandler(adapter).block();
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/reactive/actuator/WebSecurityConfig.java

@@ -0,0 +1,28 @@
+package com.baeldung.reactive.actuator;
+
+import org.springframework.boot.actuate.autoconfigure.security.reactive.EndpointRequest;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
+import org.springframework.security.config.web.server.ServerHttpSecurity;
+import org.springframework.security.web.server.SecurityWebFilterChain;
+
+@Configuration
+@EnableWebFluxSecurity
+public class WebSecurityConfig {
+ 
+    
+    @Bean
+    public SecurityWebFilterChain securitygWebFilterChain(
+      ServerHttpSecurity http) {
+        return  http
+     
+            .authorizeExchange()
+                .matchers(EndpointRequest.to(
+                       FeaturesEndpoint.class
+                )).permitAll().and().csrf().disable().build();
+    }
+    
+}

spring-5-reactive/src/main/java/com/baeldung/reactive/cors/annotated/CorsOnAnnotatedElementsApplication.java

@@ -4,16 +4,8 @@ import java.util.Collections;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration;
-import org.springframework.boot.autoconfigure.data.mongo.MongoReactiveDataAutoConfiguration;
-import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
-import org.springframework.boot.autoconfigure.mongo.MongoReactiveAutoConfiguration;
 
-@SpringBootApplication(exclude = { MongoAutoConfiguration.class,
+@SpringBootApplication
-        MongoDataAutoConfiguration.class,
-        MongoReactiveDataAutoConfiguration.class,
-        MongoReactiveAutoConfiguration.class }
-)
 public class CorsOnAnnotatedElementsApplication {
 
     public static void main(String[] args) {

spring-5-reactive/src/main/java/com/baeldung/reactive/cors/webfilter/controllers/FurtherCorsConfigsController.java

@@ -8,8 +8,8 @@ import org.springframework.web.bind.annotation.RestController;
 
 import reactor.core.publisher.Mono;
 
-@RestController
+//@RestController
-@RequestMapping("/web-filter-and-more-on-annotated")
+//@RequestMapping("/web-filter-and-more-on-annotated")
 public class FurtherCorsConfigsController {
 
     @DeleteMapping("/further-mixed-config-endpoint")

spring-5-reactive/src/main/java/com/baeldung/reactive/cors/webfilter/controllers/RegularRestController.java

@@ -7,8 +7,8 @@ import org.springframework.web.bind.annotation.RestController;
 
 import reactor.core.publisher.Mono;
 
-@RestController
+//@RestController
-@RequestMapping("/web-filter-on-annotated")
+//@RequestMapping("/web-filter-on-annotated")
 public class RegularRestController {
 
     @PutMapping("/regular-put-endpoint")

spring-5-reactive/src/main/java/com/baeldung/reactive/security/GreetController.java

@@ -0,0 +1,37 @@
+package com.baeldung.reactive.security;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+import java.security.Principal;
+
+@RestController
+public class GreetController {
+
+    private GreetService greetService;
+
+    public GreetController(GreetService greetService) {
+        this.greetService = greetService;
+    }
+
+    @GetMapping("/")
+    public Mono<String> greet(Mono<Principal> principal) {
+        return principal
+                .map(Principal::getName)
+                .map(name -> String.format("Hello, %s", name));
+    }
+
+    @GetMapping("/admin")
+    public Mono<String> greetAdmin(Mono<Principal> principal) {
+        return principal
+                .map(Principal::getName)
+                .map(name -> String.format("Admin access: %s", name));
+    }
+
+    @GetMapping("/greetService")
+    public Mono<String> greetService() {
+        return greetService.greet();
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/reactive/security/GreetService.java

@@ -0,0 +1,15 @@
+package com.baeldung.reactive.security;
+
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Mono;
+
+@Service
+public class GreetService {
+
+    @PreAuthorize("hasRole('ADMIN')")
+    public Mono<String> greet() {
+        return Mono.just("Hello from service!");
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/reactive/security/SecurityConfig.java

@@ -0,0 +1,42 @@
+package com.baeldung.reactive.security;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.security.config.annotation.method.configuration.EnableReactiveMethodSecurity;
+import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
+import org.springframework.security.config.web.server.ServerHttpSecurity;
+import org.springframework.security.core.userdetails.MapReactiveUserDetailsService;
+import org.springframework.security.core.userdetails.User;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.web.server.SecurityWebFilterChain;
+
+@EnableWebFluxSecurity
+@EnableReactiveMethodSecurity
+public class SecurityConfig {
+
+    @Bean
+    public SecurityWebFilterChain securitygWebFilterChain(ServerHttpSecurity http) {
+        return http.authorizeExchange()
+                .pathMatchers("/admin").hasAuthority("ROLE_ADMIN")
+                .anyExchange().permitAll()
+                .and().formLogin()
+                .and().build();
+    }
+
+    @Bean
+    public MapReactiveUserDetailsService userDetailsService() {
+        UserDetails user = User.withDefaultPasswordEncoder()
+                .username("user")
+                .password("password")
+                .roles("USER")
+                .build();
+
+        UserDetails admin = User.withDefaultPasswordEncoder()
+                .username("admin")
+                .password("password")
+                .roles("ADMIN")
+                .build();
+
+        return new MapReactiveUserDetailsService(user, admin);
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/web/reactive/Task.java

@@ -0,0 +1,28 @@
+package com.baeldung.web.reactive;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Task {
+
+    private final String name;
+
+    private final int id;
+
+    public Task(@JsonProperty("name") String name, @JsonProperty("id") int id) {
+        this.name = name;
+        this.id = id;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public int getId() {
+        return this.id;
+    }
+
+    @Override
+    public String toString() {
+        return "Task{" + "name='" + name + '\'' + ", id=" + id + '}';
+    }
+}

spring-5-reactive/src/main/java/com/baeldung/web/reactive/client/WebClientController.java

@@ -0,0 +1,83 @@
+package com.baeldung.web.reactive.client;
+
+import org.reactivestreams.Publisher;
+import org.reactivestreams.Subscriber;
+import org.springframework.http.*;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.reactive.function.BodyInserter;
+import org.springframework.web.reactive.function.BodyInserters;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.net.URI;
+import java.nio.charset.Charset;
+import java.time.ZonedDateTime;
+import java.util.Collections;
+
+@RestController
+public class WebClientController {
+
+    @ResponseStatus(HttpStatus.OK)
+    @GetMapping("/resource")
+    public void getResource() {
+    }
+
+    public void demonstrateWebClient() {
+        // request
+        WebClient.UriSpec<WebClient.RequestBodySpec> request1 = createWebClientWithServerURLAndDefaultValues().method(HttpMethod.POST);
+        WebClient.UriSpec<WebClient.RequestBodySpec> request2 = createWebClientWithServerURLAndDefaultValues().post();
+
+        // request body specifications
+        WebClient.RequestBodySpec uri1 = createWebClientWithServerURLAndDefaultValues().method(HttpMethod.POST)
+            .uri("/resource");
+        WebClient.RequestBodySpec uri2 = createWebClientWithServerURLAndDefaultValues().post()
+            .uri(URI.create("/resource"));
+
+        // request header specification
+        WebClient.RequestHeadersSpec<?> requestSpec1 = uri1.body(BodyInserters.fromPublisher(Mono.just("data"), String.class));
+        WebClient.RequestHeadersSpec<?> requestSpec2 = uri2.body(BodyInserters.fromObject("data"));
+
+        // inserters
+        BodyInserter<Publisher<String>, ReactiveHttpOutputMessage> inserter1 = BodyInserters
+                .fromPublisher(Subscriber::onComplete, String.class);
+
+        LinkedMultiValueMap<String, String> map = new LinkedMultiValueMap<>();
+        map.add("key1", "value1");
+        map.add("key2", "value2");
+
+        // BodyInserter<MultiValueMap<String, ?>, ClientHttpRequest> inserter2 = BodyInserters.fromMultipartData(map);
+        BodyInserter<String, ReactiveHttpOutputMessage> inserter3 = BodyInserters.fromObject("body");
+
+        // responses
+        WebClient.ResponseSpec response1 = uri1.body(inserter3)
+            .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+            .accept(MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML)
+            .acceptCharset(Charset.forName("UTF-8"))
+            .ifNoneMatch("*")
+            .ifModifiedSince(ZonedDateTime.now())
+            .retrieve();
+        WebClient.ResponseSpec response2 = requestSpec2.retrieve();
+
+    }
+
+    private WebClient createWebClient() {
+        return WebClient.create();
+    }
+
+    private WebClient createWebClientWithServerURL() {
+        return WebClient.create("http://localhost:8081");
+    }
+
+    private WebClient createWebClientWithServerURLAndDefaultValues() {
+        return WebClient.builder()
+            .baseUrl("http://localhost:8081")
+            .defaultCookie("cookieKey", "cookieValue")
+            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+            .defaultUriVariables(Collections.singletonMap("url", "http://localhost:8080"))
+            .build();
+    }
+
+}

spring-5-reactive/src/main/java/com/baeldung/websocket/Event.java

@@ -1,4 +1,4 @@
-package com.baeldung.reactive.websocket;
+package com.baeldung.websocket;
 
 import lombok.AllArgsConstructor;
 import lombok.Data;

spring-5-reactive/src/main/java/com/baeldung/websocket/ReactiveJavaClientWebSocket.java

@@ -1,4 +1,4 @@
-package com.baeldung.reactive.websocket;
+package com.baeldung.websocket;
 
 import java.net.URI;
 import java.time.Duration;

spring-5-reactive/src/main/java/com/baeldung/websocket/ReactiveWebSocketApplication.java

@@ -1,4 +1,4 @@
-package com.baeldung.reactive.websocket;
+package com.baeldung.websocket;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-5-reactive/src/main/java/com/baeldung/websocket/ReactiveWebSocketConfiguration.java

@@ -1,4 +1,4 @@
-package com.baeldung.reactive.websocket;
+package com.baeldung.websocket;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;

spring-5-reactive/src/main/java/com/baeldung/websocket/ReactiveWebSocketHandler.java

@@ -1,4 +1,4 @@
-package com.baeldung.reactive.websocket;
+package com.baeldung.websocket;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;

spring-5-reactive/src/test/java/com/baeldung/functional/FunctionalWebApplicationIntegrationTest.java

@@ -0,0 +1,141 @@
+package com.baeldung.functional;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.springframework.boot.web.server.WebServer;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.reactive.function.BodyInserters;
+
+import static org.springframework.web.reactive.function.BodyInserters.fromObject;
+import static org.springframework.web.reactive.function.BodyInserters.fromResource;
+
+public class FunctionalWebApplicationIntegrationTest {
+
+    private static WebTestClient client;
+    private static WebServer server;
+
+    @BeforeClass
+    public static void setup() throws Exception {
+        server = new FunctionalWebApplication().start();
+        client = WebTestClient.bindToServer()
+            .baseUrl("http://localhost:" + server.getPort())
+            .build();
+    }
+
+    @AfterClass
+    public static void destroy() {
+        server.stop();
+    }
+
+    @Test
+    public void givenRouter_whenGetTest_thenGotHelloWorld() throws Exception {
+        client.get()
+            .uri("/test")
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBody(String.class)
+            .isEqualTo("helloworld");
+    }
+
+    @Test
+    public void givenIndexFilter_whenRequestRoot_thenRewrittenToTest() throws Exception {
+        client.get()
+            .uri("/")
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBody(String.class)
+            .isEqualTo("helloworld");
+    }
+
+    @Test
+    public void givenLoginForm_whenPostValidToken_thenSuccess() throws Exception {
+        MultiValueMap<String, String> formData = new LinkedMultiValueMap<>(1);
+        formData.add("user", "baeldung");
+        formData.add("token", "you_know_what_to_do");
+
+        client.post()
+            .uri("/login")
+            .contentType(MediaType.APPLICATION_FORM_URLENCODED)
+            .body(BodyInserters.fromFormData(formData))
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBody(String.class)
+            .isEqualTo("welcome back!");
+    }
+
+    @Test
+    public void givenLoginForm_whenRequestWithInvalidToken_thenFail() throws Exception {
+        MultiValueMap<String, String> formData = new LinkedMultiValueMap<>(2);
+        formData.add("user", "baeldung");
+        formData.add("token", "try_again");
+
+        client.post()
+            .uri("/login")
+            .contentType(MediaType.APPLICATION_FORM_URLENCODED)
+            .body(BodyInserters.fromFormData(formData))
+            .exchange()
+            .expectStatus()
+            .isBadRequest();
+    }
+
+    @Test
+    public void givenUploadForm_whenRequestWithMultipartData_thenSuccess() throws Exception {
+        Resource resource = new ClassPathResource("/baeldung-weekly.png");
+        client.post()
+            .uri("/upload")
+            .contentType(MediaType.MULTIPART_FORM_DATA)
+            .body(fromResource(resource))
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBody(String.class)
+            .isEqualTo(String.valueOf(resource.contentLength()));
+    }
+
+    @Test
+    public void givenActors_whenAddActor_thenAdded() throws Exception {
+        client.get()
+            .uri("/actor")
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBodyList(Actor.class)
+            .hasSize(2);
+
+        client.post()
+            .uri("/actor")
+            .body(fromObject(new Actor("Clint", "Eastwood")))
+            .exchange()
+            .expectStatus()
+            .isOk();
+
+        client.get()
+            .uri("/actor")
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBodyList(Actor.class)
+            .hasSize(3);
+    }
+
+    @Test
+    public void givenResources_whenAccess_thenGot() throws Exception {
+        client.get()
+            .uri("/files/hello.txt")
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBody(String.class)
+            .isEqualTo("hello");
+    }
+
+}

spring-5-reactive/src/test/java/com/baeldung/reactive/Spring5ReactiveServerClientIntegrationTest.java

@@ -0,0 +1,96 @@
+package com.baeldung.reactive;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.http.server.reactive.ReactorHttpHandlerAdapter;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.RouterFunctions;
+import org.springframework.web.reactive.function.server.ServerResponse;
+
+import com.baeldung.web.reactive.Task;
+
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.ipc.netty.NettyContext;
+import reactor.ipc.netty.http.server.HttpServer;
+
+import java.time.Duration;
+
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+
+public class Spring5ReactiveServerClientIntegrationTest {
+
+    private static NettyContext nettyContext;
+
+    @BeforeAll
+    public static void setUp() throws Exception {
+        HttpServer server = HttpServer.create("localhost", 8080);
+        RouterFunction<?> route = RouterFunctions.route(POST("/task/process"), request -> ServerResponse.ok()
+            .body(request.bodyToFlux(Task.class)
+                .map(ll -> new Task("TaskName", 1)), Task.class))
+            .and(RouterFunctions.route(GET("/task"), request -> ServerResponse.ok()
+                .body(Mono.just("server is alive"), String.class)));
+        HttpHandler httpHandler = RouterFunctions.toHttpHandler(route);
+        ReactorHttpHandlerAdapter adapter = new ReactorHttpHandlerAdapter(httpHandler);
+        nettyContext = server.newHandler(adapter)
+            .block();
+    }
+
+    @AfterAll
+    public static void shutDown() {
+        nettyContext.dispose();
+    }
+
+    // @Test
+    // public void givenCheckTask_whenServerHandle_thenServerResponseALiveString() throws Exception {
+    // WebClient client = WebClient.create("http://localhost:8080");
+    // Mono<String> result = client
+    // .get()
+    // .uri("/task")
+    // .exchange()
+    // .then(response -> response.bodyToMono(String.class));
+    //
+    // assertThat(result.block()).isInstanceOf(String.class);
+    // }
+
+    // @Test
+    // public void givenThreeTasks_whenServerHandleTheTasks_thenServerResponseATask() throws Exception {
+    // URI uri = URI.create("http://localhost:8080/task/process");
+    // ExchangeFunction exchange = ExchangeFunctions.create(new ReactorClientHttpConnector());
+    // ClientRequest request = ClientRequest
+    // .method(HttpMethod.POST, uri)
+    // .body(BodyInserters.fromPublisher(getLatLngs(), Task.class))
+    // .build();
+    //
+    // Flux<Task> taskResponse = exchange
+    // .exchange(request)
+    // .flatMap(response -> response.bodyToFlux(Task.class));
+    //
+    // assertThat(taskResponse.blockFirst()).isInstanceOf(Task.class);
+    // }
+
+    // @Test
+    // public void givenCheckTask_whenServerHandle_thenOragicServerResponseALiveString() throws Exception {
+    // URI uri = URI.create("http://localhost:8080/task");
+    // ExchangeFunction exchange = ExchangeFunctions.create(new ReactorClientHttpConnector());
+    // ClientRequest request = ClientRequest
+    // .method(HttpMethod.GET, uri)
+    // .body(BodyInserters.fromPublisher(getLatLngs(), Task.class))
+    // .build();
+    //
+    // Flux<String> taskResponse = exchange
+    // .exchange(request)
+    // .flatMap(response -> response.bodyToFlux(String.class));
+    //
+    // assertThat(taskResponse.blockFirst()).isInstanceOf(String.class);
+    // }
+
+    private static Flux<Task> getLatLngs() {
+        return Flux.range(0, 3)
+            .zipWith(Flux.interval(Duration.ofSeconds(1)))
+            .map(x -> new Task("taskname", 1))
+            .doOnNext(ll -> System.out.println("Produced: {}" + ll));
+    }
+}

spring-5-reactive/src/test/java/com/baeldung/reactive/webflux/EmployeeControllerIntegrationTest.java

@@ -15,13 +15,15 @@ import org.springframework.boot.test.mock.mockito.MockBean;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.test.web.reactive.server.WebTestClient;
 
+import com.baeldung.reactive.Spring5ReactiveApplication;
+
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
 @RunWith(SpringRunner.class)
-@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes=Spring5ReactiveApplication.class)
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
-public class EmployeeControllerUnitTest {
+public class EmployeeControllerIntegrationTest {
 
     @Autowired
     private WebTestClient testClient;

spring-5-reactive/src/test/java/com/baeldung/security/SecurityIntegrationTest.java

@@ -0,0 +1,40 @@
+package com.baeldung.security;
+
+import com.baeldung.reactive.SpringSecurity5Application;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = SpringSecurity5Application.class)
+public class SecurityIntegrationTest {
+
+    @Autowired
+    ApplicationContext context;
+
+    private WebTestClient rest;
+
+    @Before
+    public void setup() {
+        this.rest = WebTestClient.bindToApplicationContext(this.context).configureClient().build();
+    }
+
+    @Test
+    public void whenNoCredentials_thenRedirectToLogin() {
+        this.rest.get().uri("/").exchange().expectStatus().is3xxRedirection();
+    }
+
+    @Test
+    @Ignore
+    @WithMockUser
+    public void whenHasCredentials_thenSeesGreeting() {
+        this.rest.get().uri("/").exchange().expectStatus().isOk().expectBody(String.class).isEqualTo("Hello, user");
+    }
+}

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

@@ -0,0 +1,60 @@
+package com.baeldung.web.client;
+
+import com.baeldung.reactive.Spring5ReactiveApplication;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.web.reactive.function.server.RequestPredicates;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.RouterFunctions;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import org.springframework.web.server.WebHandler;
+import reactor.core.publisher.Mono;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Spring5ReactiveApplication.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class WebTestClientIntegrationTest {
+
+    @LocalServerPort
+    private int port;
+
+    private final RouterFunction ROUTER_FUNCTION = RouterFunctions.route(RequestPredicates.GET("/resource"), request -> ServerResponse.ok()
+        .build());
+    private final WebHandler WEB_HANDLER = exchange -> Mono.empty();
+
+    @Test
+    public void testWebTestClientWithServerWebHandler() {
+        WebTestClient.bindToWebHandler(WEB_HANDLER)
+            .build();
+    }
+
+    @Test
+    public void testWebTestClientWithRouterFunction() {
+        WebTestClient.bindToRouterFunction(ROUTER_FUNCTION)
+            .build()
+            .get()
+            .uri("/resource")
+            .exchange()
+            .expectStatus()
+            .isOk()
+            .expectBody()
+            .isEmpty();
+    }
+
+    @Test
+    public void testWebTestClientWithServerURL() {
+        WebTestClient.bindToServer()
+            .baseUrl("http://localhost:" + port)
+            .build()
+            .get()
+            .uri("/resource")
+            .exchange()
+            .expectStatus()
+            .is3xxRedirection()
+            .expectBody();
+    }
+
+}