BAEL-2715: Added code samples for Netty server configuration

pom.xml

@@ -575,6 +575,7 @@
                 <module>spring-5-reactive-client</module>
                 <module>spring-5-reactive-oauth</module>
                 <module>spring-5-reactive-security</module>
+                <module>spring-5-reactive-netty</module>
                 <module>spring-5-security</module>
                 <module>spring-5-security-oauth</module>
                 

spring-5-reactive-netty/.gitignore

@@ -0,0 +1,11 @@
+# Folders #
+**/.idea
+**/target
+
+# Files #
+*.log
+
+# Packaged files #
+*.jar
+*.war
+*.ear

spring-5-reactive-netty/README.md

@@ -0,0 +1,3 @@
+## Spring 5 Reactive Project With Netty Server
+
+Includes configuration options for Netty server.

spring-5-reactive-netty/pom.xml

@@ -0,0 +1,51 @@
+<?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-reactive-netty</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-5-reactive-netty</name>
+    <packaging>jar</packaging>
+    <description>Spring 5 sample project about reactive web with Netty server</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-webflux</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-5-reactive-netty/src/main/java/com/baeldung/serverconfig/ServerConfigApplication.java

@@ -0,0 +1,16 @@
+package com.baeldung.serverconfig;
+
+import com.baeldung.serverconfig.client.GreetingWebClient;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ServerConfigApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ServerConfigApplication.class, args);
+
+        GreetingWebClient webClient = new GreetingWebClient();
+        webClient.getResult();
+    }
+}

spring-5-reactive-netty/src/main/java/com/baeldung/serverconfig/client/GreetingWebClient.java

@@ -0,0 +1,37 @@
+package com.baeldung.serverconfig.client;
+
+import io.netty.handler.ssl.SslContext;
+import io.netty.handler.ssl.SslContextBuilder;
+import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
+import lombok.SneakyThrows;
+import org.springframework.http.client.reactive.ReactorClientHttpConnector;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+import reactor.netty.http.client.HttpClient;
+
+public class GreetingWebClient {
+
+    private WebClient client = getWebClient();
+
+    public void getResult() {
+        System.out.println("Mono");
+        Mono<String> greetingMono = client.get()
+                                          .uri("/greet/{name}", "baeldung")
+                                          .retrieve()
+                                          .bodyToMono(String.class);
+
+        greetingMono.subscribe(System.out::println);
+    }
+
+    @SneakyThrows
+    private WebClient getWebClient() {
+        SslContext sslContext = SslContextBuilder
+                .forClient()
+                .trustManager(InsecureTrustManagerFactory.INSTANCE)
+                .build();
+        HttpClient httpClient = HttpClient.create().secure(t -> t.sslContext(sslContext));
+        return WebClient.builder()
+                        .baseUrl("https://localhost:8443")
+                        .clientConnector(new ReactorClientHttpConnector(httpClient)).build();
+    }
+}

spring-5-reactive-netty/src/main/java/com/baeldung/serverconfig/server/GreetingController.java

@@ -0,0 +1,23 @@
+package com.baeldung.serverconfig.server;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping("/greet")
+public class GreetingController {
+
+    private final GreetingService greetingService;
+
+    public GreetingController(GreetingService greetingService) {
+        this.greetingService = greetingService;
+    }
+
+    @GetMapping("/{name}")
+    private Mono<String> greet(@PathVariable String name) {
+        return greetingService.greet(name);
+    }
+}

spring-5-reactive-netty/src/main/java/com/baeldung/serverconfig/server/GreetingService.java

@@ -0,0 +1,12 @@
+package com.baeldung.serverconfig.server;
+
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Mono;
+
+@Service
+public class GreetingService {
+
+    public Mono<String> greet(String name) {
+        return Mono.just("Greeting " + name);
+    }
+}

spring-5-reactive-netty/src/main/java/com/baeldung/serverconfig/server/NettyWebServerFactoryPortCustomizer.java

@@ -0,0 +1,31 @@
+package com.baeldung.serverconfig.server;
+
+import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.netty.NettyServerCustomizer;
+import org.springframework.boot.web.server.WebServerFactoryCustomizer;
+import org.springframework.stereotype.Component;
+import reactor.netty.http.server.HttpServer;
+
+@Component
+public class NettyWebServerFactoryPortCustomizer implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> {
+
+    @Override
+    public void customize(NettyReactiveWebServerFactory serverFactory) {
+        serverFactory.addServerCustomizers(new PortCustomizer(8443));
+    }
+
+    private static class PortCustomizer implements NettyServerCustomizer {
+
+        private final int port;
+
+        private PortCustomizer(int port) {
+            this.port = port;
+        }
+
+        @Override
+        public HttpServer apply(HttpServer httpServer) {
+            return httpServer.port(port);
+        }
+    }
+}
+

spring-5-reactive-netty/src/main/java/com/baeldung/serverconfig/server/NettyWebServerFactorySslCustomizer.java

@@ -0,0 +1,23 @@
+package com.baeldung.serverconfig.server;
+
+import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory;
+import org.springframework.boot.web.server.Ssl;
+import org.springframework.boot.web.server.WebServerFactoryCustomizer;
+import org.springframework.stereotype.Component;
+
+@Component
+public class NettyWebServerFactorySslCustomizer implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> {
+
+    @Override
+    public void customize(NettyReactiveWebServerFactory serverFactory) {
+        Ssl ssl = new Ssl();
+        ssl.setEnabled(true);
+        ssl.setKeyStore("classpath:sample.jks");
+        ssl.setKeyAlias("alias");
+        ssl.setKeyPassword("password");
+        ssl.setKeyStorePassword("secret");
+        serverFactory.setSsl(ssl);
+        serverFactory.setPort(8443);
+    }
+}
+

spring-5-reactive-netty/src/main/resources/logback.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="Console"
+        class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            <Pattern>
+                %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
+            </Pattern>
+        </layout>
+    </appender>
+
+    <appender name="AccessLog" class="ch.qos.logback.core.FileAppender">
+        <file>netty-access.log</file>
+        <encoder>
+            <pattern>%msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="Async" class="ch.qos.logback.classic.AsyncAppender">
+        <appender-ref ref="AccessLog"/>
+    </appender>
+
+    <logger name="reactor.netty.http.server.AccessLog" level="INFO" additivity="false">
+        <appender-ref ref="Console"/>
+        <appender-ref ref="Async"/>
+    </logger>
+
+    <root level="info">
+        <appender-ref ref="Console"/>
+    </root>
+</configuration>

spring-5-reactive-netty/src/test/java/com/baeldung/serverconfig/server/GreetingControllerIntegrationTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.serverconfig.server;
+
+import static org.mockito.Mockito.when;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import reactor.core.publisher.Mono;
+
+@RunWith(SpringRunner.class)
+@WebFluxTest
+public class GreetingControllerIntegrationTest {
+
+    @Autowired
+    private WebTestClient webClient;
+
+    @MockBean
+    private GreetingService greetingService;
+
+    private final String name = "baeldung";
+
+    @Before
+    public void setUp() {
+        when(greetingService.greet(name)).thenReturn(Mono.just("Hello baeldung"));
+    }
+
+    @Test
+    public void shouldGreet() {
+        webClient.get().uri("/greet/{name}", name)
+                 .exchange()
+                 .expectStatus()
+                 .isOk()
+                 .expectBody(String.class)
+                 .isEqualTo("Hello baeldung");
+    }
+}

spring-5-reactive-netty/src/test/resources/logback-test.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            <Pattern>
+                %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
+            </Pattern>
+        </layout>
+    </appender>
+    <root level="info">
+        <appender-ref ref="Console"/>
+    </root>
+</configuration>