增加 Zuul 示例

labx-21/labx-21-sc-zuul-demo02-registry/src/main/resources/application.yaml

@@ -5,6 +5,12 @@ spring:
   application:
     name: zuul-application
 
+  cloud:
+    nacos:
+      # Nacos 作为注册中心的配置项
+      discovery:
+        server-addr: 127.0.0.1:8848 # Nacos 服务器地址
+
 # Zuul 配置项，对应 ZuulProperties 配置类
 zuul:
   servlet-path: / # ZuulServlet 匹配的路径，默认为 /zuul

labx-21/labx-21-sc-zuul-demo03-config-apollo/pom.xml

@@ -0,0 +1,83 @@
+<?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">
+    <parent>
+        <artifactId>labx-21</artifactId>
+        <groupId>cn.iocoder.springboot.labs</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>labx-21-sc-zuul-demo03-config-apollo</artifactId>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>6</source>
+                    <target>6</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <spring.boot.version>2.2.4.RELEASE</spring.boot.version>
+        <spring.cloud.version>Hoxton.SR1</spring.cloud.version>
+        <spring.cloud.alibaba.version>2.2.0.RELEASE</spring.cloud.alibaba.version>
+    </properties>
+
+    <!--
+        引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
+        在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
+     -->
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-parent</artifactId>
+                <version>${spring.boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>${spring.cloud.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>com.alibaba.cloud</groupId>
+                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
+                <version>${spring.cloud.alibaba.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <!-- 引入 Spring Cloud Zuul 相关依赖，使用它作为网关，并实现对其的自动配置 -->
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
+        </dependency>
+
+        <!-- 引入 Spring Cloud Alibaba Nacos Discovery 相关依赖，将 Nacos 作为注册中心，并实现对其的自动配置 -->
+        <dependency>
+            <groupId>com.alibaba.cloud</groupId>
+            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
+        </dependency>
+
+        <!--  引入 Apollo 客户端，内置对 Apollo 的自动化配置 -->
+        <dependency>
+            <groupId>com.ctrip.framework.apollo</groupId>
+            <artifactId>apollo-client</artifactId>
+            <version>1.5.1</version>
+        </dependency>
+    </dependencies>
+
+</project>

labx-21/labx-21-sc-zuul-demo03-config-apollo/src/main/java/cn/iocoder/springcloud/labx21/zuuldemo/ZuulApplication.java

@@ -0,0 +1,15 @@
+package cn.iocoder.springcloud.labx21.zuuldemo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
+
+@SpringBootApplication
+@EnableZuulProxy // 开启 Zuul 网关
+public class ZuulApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ZuulApplication.class, args);
+    }
+
+}

labx-21/labx-21-sc-zuul-demo03-config-apollo/src/main/java/cn/iocoder/springcloud/labx21/zuuldemo/ZuulPropertiesRefresher.java

@@ -0,0 +1,51 @@
+package cn.iocoder.springcloud.labx21.zuuldemo;
+
+import com.ctrip.framework.apollo.model.ConfigChangeEvent;
+import com.ctrip.framework.apollo.spring.annotation.ApolloConfigChangeListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
+import org.springframework.cloud.netflix.zuul.RoutesRefreshedEvent;
+import org.springframework.cloud.netflix.zuul.filters.RouteLocator;
+import org.springframework.context.ApplicationContext;
+import org.springframework.stereotype.Component;
+
+/**
+ * 由 https://github.com/ctripcorp/apollo-use-cases/blob/master/spring-cloud-zuul 提供代码，感谢~
+ */
+@Component
+public class ZuulPropertiesRefresher {
+
+    private static final Logger logger = LoggerFactory.getLogger(ZuulPropertiesRefresher.class);
+
+    @Autowired
+    private ApplicationContext applicationContext;
+
+    @Autowired
+    private RouteLocator routeLocator;
+
+    @ApolloConfigChangeListener(interestedKeyPrefixes = "zuul.")
+    public void onChange(ConfigChangeEvent changeEvent) {
+        refreshZuulProperties(changeEvent);
+    }
+
+    private void refreshZuulProperties(ConfigChangeEvent changeEvent) {
+        logger.info("Refreshing zuul properties!");
+
+        /*
+         * rebind configuration beans, e.g. ZuulProperties
+         * @see org.springframework.cloud.context.properties.ConfigurationPropertiesRebinder#onApplicationEvent
+         */
+        this.applicationContext.publishEvent(new EnvironmentChangeEvent(changeEvent.changedKeys()));
+
+        /*
+         * refresh routes
+         * @see org.springframework.cloud.netflix.zuul.ZuulServerAutoConfiguration.ZuulRefreshListener#onApplicationEvent
+         */
+        this.applicationContext.publishEvent(new RoutesRefreshedEvent(routeLocator));
+
+        logger.info("Zuul properties refreshed!");
+    }
+
+}

labx-21/labx-21-sc-zuul-demo03-config-apollo/src/main/resources/application.yaml

@@ -0,0 +1,23 @@
+server:
+  port: 8888
+
+spring:
+  application:
+    name: zuul-application
+
+  cloud:
+    nacos:
+      # Nacos 作为注册中心的配置项
+      discovery:
+        server-addr: 127.0.0.1:8848 # Nacos 服务器地址
+
+# Apollo 相关配置项
+app:
+  id: ${spring.application.name} # 使用的 Apollo 的项目（应用）编号
+apollo:
+  meta: http://127.0.0.1:8080 # Apollo Meta Server 地址
+  bootstrap:
+    enabled: true # 是否开启 Apollo 配置预加载功能。默认为 false。
+    eagerLoad:
+      enable: true # 是否开启 Apollo 支持日志级别的加载时机。默认为 false。
+    namespaces: application # 使用的 Apollo 的命名空间，默认为 application。

labx-21/pom.xml

@@ -14,6 +14,8 @@
     <modules>
         <module>labx-21-sc-zuul-demo01</module>
         <module>labx-21-sc-zuul-demo02-registry</module>
+        <module>labx-21-sc-zuul-demo03-config-apollo</module>
+
         <module>labx-21-sc-user-service</module>
     </modules>