specify service annotation protocol

dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ProtocolAnnotationBeanPostProcessor.java

@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.dubbo.config.spring.beans.factory.annotation;
+
+import org.apache.dubbo.config.ProtocolConfig;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+
+public class ProtocolAnnotationBeanPostProcessor implements BeanDefinitionRegistryPostProcessor {
+
+    public static final String BEAN_NAME = "protocolAnnotationBeanPostProcessor";
+
+    @Override
+    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
+        if (registry instanceof DefaultListableBeanFactory) {
+            DefaultListableBeanFactory factory = (DefaultListableBeanFactory) registry;
+            String[] beanNames = factory.getBeanNamesForType(ProtocolConfig.class, true, false);
+            for (String beanName : beanNames) {
+                ProtocolConfig config = (ProtocolConfig) factory.getBean(beanName);
+                if (!factory.hasAlias(beanName, config.getId())) {
+                    registry.registerAlias(beanName, config.getId());
+                }
+            }
+        }
+    }
+
+    @Override
+    public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
+
+    }
+}

dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScanRegistrar.java

@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.context.annotation;
 
 import org.apache.dubbo.config.annotation.Service;
+import org.apache.dubbo.config.spring.beans.factory.annotation.ProtocolAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.beans.factory.annotation.ServiceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.util.BeanRegistrar;
@@ -60,6 +61,7 @@ public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, B
 
         registerReferenceAnnotationBeanPostProcessor(registry);
 
+        registerProtocolAnnotationBeanPostProcessor(registry);
     }
 
     /**
@@ -92,6 +94,10 @@ private void registerReferenceAnnotationBeanPostProcessor(BeanDefinitionRegistry
 
     }
 
+    private void registerProtocolAnnotationBeanPostProcessor(BeanDefinitionRegistry registry) {
+        BeanRegistrar.registerInfrastructureBean(registry, ProtocolAnnotationBeanPostProcessor.BEAN_NAME, ProtocolAnnotationBeanPostProcessor.class);
+    }
+
     private Set<String> getPackagesToScan(AnnotationMetadata metadata) {
         AnnotationAttributes attributes = AnnotationAttributes.fromMap(
                 metadata.getAnnotationAttributes(DubboComponentScan.class.getName()));