1. 重新实现 Dubbo 路由的过滤器，之前的版本有问题

common/mall-spring-boot-starter-dubbo/pom.xml

@@ -26,9 +26,15 @@
         </dependency>
 
         <!-- RPC 相关 -->
+        <!-- TODO 优化点：Spring Cloud Alibaba Dubbo 的示例 -->
+<!--        <dependency>-->
+<!--            <groupId>com.alibaba.cloud</groupId>-->
+<!--            <artifactId>spring-cloud-starter-dubbo</artifactId>-->
+<!--        </dependency>-->
+
         <dependency>
-            <groupId>com.alibaba.cloud</groupId>
-            <artifactId>spring-cloud-starter-dubbo</artifactId>
+            <groupId>org.apache.dubbo</groupId>
+            <artifactId>dubbo-spring-boot-starter</artifactId>
         </dependency>
 
         <!-- 日志相关 -->

common/mall-spring-boot-starter-dubbo/src/main/java/cn/iocoder/mall/dubbo/config/DubboWebAutoConfiguration.java

 package cn.iocoder.mall.dubbo.config;
 
 import cn.iocoder.mall.dubbo.core.web.DubboRouterTagWebInterceptor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.context.annotation.Configuration;
@@ -11,14 +13,18 @@ import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
 public class DubboWebAutoConfiguration implements WebMvcConfigurer {
 
+    private Logger logger = LoggerFactory.getLogger(DubboWebAutoConfiguration.class);
+
     // ========== 拦截器相关 ==========
 
     @Override
     public void addInterceptors(InterceptorRegistry registry) {
         try {
+            // 设置为 -1000 的原因，保证在比较前面就处理该逻辑。例如说，认证拦截器；
             registry.addInterceptor(new DubboRouterTagWebInterceptor()).order(-1000);
+            logger.info("[addInterceptors][加载 DubboRouterTagWebInterceptor 拦截器完成]");
         } catch (NoSuchBeanDefinitionException e) {
-//            logger.warn("[addInterceptors][无法获取 AccessLogInterceptor 拦截器，因此不启动 AccessLog 的记录]");
+            logger.warn("[addInterceptors][无法获取 DubboRouterTagWebInterceptor 拦截器，无法使用 Dubbo 标签路由]");
         }
     }
 

common/mall-spring-boot-starter-dubbo/src/main/java/cn/iocoder/mall/dubbo/core/cluster/interceptor/DubboConsumerRouterTagClusterInterceptor.java

+package cn.iocoder.mall.dubbo.core.cluster.interceptor;
+
+import cn.iocoder.common.framework.util.StringUtils;
+import cn.iocoder.mall.dubbo.core.filter.DubboProviderRouterTagFilter;
+import cn.iocoder.mall.dubbo.core.router.DubboRouterTagContextHolder;
+import org.apache.dubbo.common.constants.CommonConstants;
+import org.apache.dubbo.common.extension.Activate;
+import org.apache.dubbo.rpc.Invocation;
+import org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor;
+import org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker;
+
+/**
+ * Consumer 方，在调用 Provider 时，将 {@link DubboRouterTagContextHolder} 中的 Tag 通过 Dubbo 隐式传参。
+ *
+ * 完整逻辑说明，见 {@link DubboProviderRouterTagFilter}
+ *
+ * 注意，这里需要设置到 order = 1 的原因，是需要保证排在 ConsumerContextClusterInterceptor 之后
+ */
+@Activate(group = CommonConstants.CONSUMER, order = 1)
+public class DubboConsumerRouterTagClusterInterceptor implements ClusterInterceptor {
+
+    @Override
+    public void before(AbstractClusterInvoker<?> clusterInvoker, Invocation invocation) {
+        // 设置 Dubbo Tag 到 Dubbo 隐式传参
+        String dubboTag = DubboRouterTagContextHolder.getTag();
+        if (StringUtils.hasText(dubboTag)) {
+            invocation.setAttachment(CommonConstants.TAG_KEY, dubboTag);
+        }
+    }
+
+    @Override
+    public void after(AbstractClusterInvoker<?> clusterInvoker, Invocation invocation) {
+        // 清空 Dubbo Tag 的隐式传参
+        invocation.setAttachment(CommonConstants.TAG_KEY, null);
+    }
+
+}

common/mall-spring-boot-starter-dubbo/src/main/java/cn/iocoder/mall/dubbo/core/filter/DubboRouterTagFilter.java → common/mall-spring-boot-starter-dubbo/src/main/java/cn/iocoder/mall/dubbo/core/filter/DubboProviderRouterTagFilter.java

 package cn.iocoder.mall.dubbo.core.filter;
 
 import cn.iocoder.common.framework.util.StringUtils;
+import cn.iocoder.mall.dubbo.core.cluster.interceptor.DubboConsumerRouterTagClusterInterceptor;
 import cn.iocoder.mall.dubbo.core.router.DubboRouterTagContextHolder;
 import org.apache.dubbo.common.constants.CommonConstants;
 import org.apache.dubbo.common.extension.Activate;
 import org.apache.dubbo.rpc.*;
+import org.apache.dubbo.rpc.cluster.router.tag.TagRouter;
 
 /**
  * 基于 Dubbo 标签路由规则(http://dubbo.apache.org/zh-cn/docs/user/demos/routing-rule.html)，实现如下功能：
@@ -12,49 +14,29 @@ import org.apache.dubbo.rpc.*;
  * 2. TODO 优化点：蓝绿发布、灰度发布
  *
  * 实现逻辑为：
- * 1. 对于 Consumer 方，在调用 Provider 时，会将 {@link DubboRouterTagContextHolder} 中的 Tag 通过 Dubbo 隐式传参。
- *      同时，Dubbo 自带 {@link org.apache.dubbo.rpc.cluster.router.tag.TagRouter}，会根据该参数，会选择符合该 Tag 的 Provider。
+ * 1. 对于 Consumer 方，在调用 Provider 时，{@link DubboConsumerRouterTagClusterInterceptor} 会将 {@link DubboRouterTagContextHolder} 中的 Tag 通过 Dubbo 隐式传参。
+ *      同时，Dubbo 自带 {@link TagRouter}，会根据该参数，会选择符合该 Tag 的 Provider。
  * 2. 对于 Provider 方，在通过 Dubbo 隐式传参获得到 Tag 时，会设置到 {@link DubboRouterTagContextHolder} 中。
  *      这样，在 Provider 作为 Consumer 角色时，调用其它 Provider 时，可以继续实现标签路由的功能。
  */
 @Activate(group = {CommonConstants.PROVIDER, CommonConstants.CONSUMER}, order = -1000)
-public class DubboRouterTagFilter implements Filter {
+public class DubboProviderRouterTagFilter implements Filter {
 
     @Override
     public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
-        // 消费端
-        if (RpcContext.getContext().isConsumerSide()) {
-            // 设置 Dubbo Tag 到 Dubbo 隐式传参
-            String dubboTag = DubboRouterTagContextHolder.getTag();
-            boolean hasDubboTag = StringUtils.hasText(dubboTag);
-            if (hasDubboTag) {
-                invocation.setAttachment(CommonConstants.TAG_KEY, dubboTag);
-            }
-            // 继续调用
-            try {
-                return invoker.invoke(invocation);
-            } finally {
-                // 解决极端情况下，本地 injvm 调用时，消费端会调用 DubboRouterTagContextHolder.clear() 上下文，导致消费端也被清理了，因为在同一个 JVM 进程内。
-                if (hasDubboTag) {
-                    DubboRouterTagContextHolder.setTag(dubboTag);
-                }
-            }
-            // 提供端
-        } else {
-            // 从 Dubbo 隐式传参获得 Dubbo Tag
-            String dubboTag = invocation.getAttachment(CommonConstants.TAG_KEY);
-            boolean hasDubboTag = StringUtils.hasText(dubboTag);
+       // 从 Dubbo 隐式传参获得 Dubbo Tag
+        String dubboTag = invocation.getAttachment(CommonConstants.TAG_KEY);
+        boolean hasDubboTag = StringUtils.hasText(dubboTag);
+        if (hasDubboTag) {
+            invocation.setAttachment(CommonConstants.TAG_KEY, dubboTag);
+        }
+        // 继续调用
+        try {
+            return invoker.invoke(invocation);
+        } finally {
+            // 清理
             if (hasDubboTag) {
-                invocation.setAttachment(CommonConstants.TAG_KEY, dubboTag);
-            }
-            // 继续调用
-            try {
-                return invoker.invoke(invocation);
-            } finally {
-                // 清理
-                if (hasDubboTag) {
-                    DubboRouterTagContextHolder.clear();
-                }
+                DubboRouterTagContextHolder.clear();
             }
         }
     }

common/mall-spring-boot-starter-dubbo/src/main/java/cn/iocoder/mall/dubbo/core/router/DubboRouterTagContextHolder.java

 package cn.iocoder.mall.dubbo.core.router;
 
+import cn.iocoder.mall.dubbo.core.filter.DubboProviderRouterTagFilter;
+
 /**
  * Dubbo 路由 Tag 的上下文
  *
- * @see cn.iocoder.mall.dubbo.core.filter.DubboRouterTagFilter
+ * @see DubboProviderRouterTagFilter
  * @see cn.iocoder.mall.dubbo.core.web.DubboRouterTagWebInterceptor
  */
 public class DubboRouterTagContextHolder {

common/mall-spring-boot-starter-dubbo/src/main/java/cn/iocoder/mall/dubbo/core/web/DubboRouterTagWebInterceptor.java

 package cn.iocoder.mall.dubbo.core.web;
 
 import cn.iocoder.common.framework.util.StringUtils;
+import cn.iocoder.mall.dubbo.core.cluster.interceptor.DubboConsumerRouterTagClusterInterceptor;
+import cn.iocoder.mall.dubbo.core.filter.DubboProviderRouterTagFilter;
 import cn.iocoder.mall.dubbo.core.router.DubboRouterTagContextHolder;
+import org.apache.dubbo.common.constants.CommonConstants;
+import org.apache.dubbo.rpc.RpcContext;
 import org.springframework.web.servlet.HandlerInterceptor;
 import org.springframework.web.servlet.ModelAndView;
 
@@ -11,7 +15,8 @@ import javax.servlet.http.HttpServletResponse;
 /**
  * Dubbo 路由标签的 Web 拦截器，将请求 Header 中的 {@link #HEADER_DUBBO_TAG} 设置到 {@link DubboRouterTagContextHolder} 中。
  *
- * @see cn.iocoder.mall.dubbo.core.filter.DubboRouterTagFilter
+ * @see DubboProviderRouterTagFilter
+ * @see DubboConsumerRouterTagClusterInterceptor
  */
 public class DubboRouterTagWebInterceptor implements HandlerInterceptor {
 
@@ -22,6 +27,7 @@ public class DubboRouterTagWebInterceptor implements HandlerInterceptor {
         String tag = request.getHeader(HEADER_DUBBO_TAG);
         if (StringUtils.hasText(tag)) {
             DubboRouterTagContextHolder.setTag(tag);
+            RpcContext.getContext().setAttachment(CommonConstants.TAG_KEY, tag);
         }
         return true;
     }

common/mall-spring-boot-starter-dubbo/src/main/resources/META-INF/dubbo/com.alibaba.dubbo.rpc.Filter

 dubboExceptionFilter=cn.iocoder.mall.dubbo.core.filter.DubboProviderExceptionFilter
-dubboRouterTagFilter=cn.iocoder.mall.dubbo.core.filter.DubboRouterTagFilter
+dubboProviderRouterTagFilter=cn.iocoder.mall.dubbo.core.filter.DubboProviderRouterTagFilter

common/mall-spring-boot-starter-dubbo/src/main/resources/META-INF/dubbo/org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor

+dubboConsumerRouterTagClusterInterceptor=cn.iocoder.mall.dubbo.core.cluster.interceptor.DubboConsumerRouterTagClusterInterceptor

mall-dependencies/pom.xml

@@ -41,7 +41,7 @@
         <mybatis-plus.version>3.1.1</mybatis-plus.version>
         <spring-boot-starter-data-jest.version>3.2.5.RELEASE</spring-boot-starter-data-jest.version>
         <!-- RPC 相关 -->
-        <dubbo.version>2.7.6</dubbo.version>
+        <dubbo.version>2.7.7</dubbo.version>
         <!-- Job 相关 -->
         <xxl-job.version>2.0.1</xxl-job.version>
         <!-- Transaction 相关 -->

management-web-app/src/main/resources/application-local.yml

@@ -11,4 +11,10 @@ spring:
 dubbo:
   # Dubbo 注册中心
   registry:
-    address: spring-cloud://400-infra.server.iocoder.cn:8848 # 指定 Dubbo 服务注册中心的地址
+#    address: spring-cloud://400-infra.server.iocoder.cn:8848 # 指定 Dubbo 服务注册中心的地址
+#    address: nacos://400-infra.server.iocoder.cn:8848?namespace=local # 指定 Dubbo 服务注册中心的地址
+    protocol: nacos
+    address: 400-infra.server.iocoder.cn:8848?namespace=local
+    timeout: 20000
+    register: true
+    subscribe: true

system-service-project/system-service-app/src/main/java/cn/iocoder/mall/systemservice/SystemServiceApplication.java

@@ -2,12 +2,14 @@ package cn.iocoder.mall.systemservice;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ConfigurableApplicationContext;
 
 @SpringBootApplication
 public class SystemServiceApplication {
 
     public static void main(String[] args) {
-        SpringApplication.run(SystemServiceApplication.class, args);
+        ConfigurableApplicationContext context = SpringApplication.run(SystemServiceApplication.class, args);
+        System.out.println(context);
     }
 
 }

system-service-project/system-service-app/src/main/resources/application-local.yaml

@@ -17,4 +17,5 @@ spring:
 dubbo:
   # Dubbo 注册中心
   registry:
-    address: spring-cloud://400-infra.server.iocoder.cn:8848 # 指定 Dubbo 服务注册中心的地址
+#    address: spring-cloud://400-infra.server.iocoder.cn:8848 # 指定 Dubbo 服务注册中心的地址
+    address: nacos://400-infra.server.iocoder.cn:8848?namespace=local # 指定 Dubbo 服务注册中心的地址