[Feature] add AppendParametersComponent (#3583)

* feature:add AppendParametersComponent to dynamically add some parameters / check config

* feature:add AppendParametersComponent to dynamically add some parameters / check config

Author: qinliujie

dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/AppendParametersComponent.java

@@ -0,0 +1,34 @@
+/*
+ * 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;
+
+import org.apache.dubbo.common.extension.SPI;
+
+/**
+ * Dynamically add some parameters / check config
+ */
+
+@SPI
+public interface AppendParametersComponent {
+    default void appendReferParameters(ReferenceConfig referenceConfig) {
+
+    }
+
+    default void appendExportParameters(ServiceConfig serviceConfig) {
+
+    }
+}

dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ReferenceConfig.java

@@ -214,6 +214,13 @@ public void checkAndUpdateSubConfigs() {
         resolveFile();
         checkApplication();
         checkMetadataReport();
+        appendParameters();
+    }
+
+    private void appendParameters() {
+        URL appendParametersUrl = URL.valueOf("appendParameters://");
+        List<AppendParametersComponent> appendParametersComponents = ExtensionLoader.getExtensionLoader(AppendParametersComponent.class).getActivateExtension(appendParametersUrl, (String[]) null);
+        appendParametersComponents.forEach(component -> component.appendReferParameters(this));
     }
 
     public synchronized T get() {

dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java

@@ -322,6 +322,13 @@ public void checkAndUpdateSubConfigs() {
         }
         checkStubAndLocal(interfaceClass);
         checkMock(interfaceClass);
+        appendParameters();
+    }
+
+    private void appendParameters() {
+        URL appendParametersUrl = URL.valueOf("appendParameters://");
+        List<AppendParametersComponent> appendParametersComponents = ExtensionLoader.getExtensionLoader(AppendParametersComponent.class).getActivateExtension(appendParametersUrl, (String[]) null);
+        appendParametersComponents.forEach(component -> component.appendExportParameters(this));
     }
 
     public synchronized void export() {