tedli commented on a change in pull request #73:
URL: https://github.com/apache/skywalking-java/pull/73#discussion_r754862702



##########
File path: 
apm-sniffer/apm-sdk-plugin/dubbo-3-conflict-patch/src/main/java/org/apache/skywalking/apm/plugin/asf/dubbo3/patch/WrapperInstrumentation.java
##########
@@ -0,0 +1,64 @@
+/*
+ * 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.skywalking.apm.plugin.asf.dubbo3.patch;
+
+import net.bytebuddy.description.method.MethodDescription;
+import net.bytebuddy.matcher.ElementMatcher;
+import 
org.apache.skywalking.apm.agent.core.plugin.interceptor.StaticMethodsInterceptPoint;
+import 
org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassStaticMethodsEnhancePluginDefine;
+import org.apache.skywalking.apm.agent.core.plugin.match.ClassMatch;
+
+import static net.bytebuddy.matcher.ElementMatchers.named;
+import static 
org.apache.skywalking.apm.agent.core.plugin.match.NameMatch.byName;
+
+/**
+ * The dubbo conflict plugin resolver the problem about the wrapper class 
generated by Dubbo core cannot be compiled
+ * successfully. As we known, The wrapper class traverses all the methods. In 
usual, it works unless this class has been
+ * enhanced by Skywalking. The javasist cannot found the `EnhanceInstance` 
method when generate.
+ * <p>
+ * The plugin excludes {@link 
org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance}
 methods
+ * to ensure the correct compilation of the code.
+ */
+public class WrapperInstrumentation extends 
ClassStaticMethodsEnhancePluginDefine {
+    @Override
+    public StaticMethodsInterceptPoint[] getStaticMethodsInterceptPoints() {
+        return new StaticMethodsInterceptPoint[] {
+            new StaticMethodsInterceptPoint() {
+                @Override
+                public ElementMatcher<MethodDescription> getMethodsMatcher() {
+                    return named("makeWrapper");
+                }
+
+                @Override
+                public String getMethodsInterceptor() {
+                    return 
"org.apache.skywalking.apm.plugin.asf.dubbo3.patch.MakeWrapperInterceptor";
+                }
+
+                @Override
+                public boolean isOverrideArgs() {
+                    return false;
+                }
+            }
+        };
+    }
+
+    @Override
+    protected ClassMatch enhanceClass() {
+        return byName("org.apache.dubbo.common.bytecode.Wrapper");

Review comment:
       It because, for classes and methods expose to user side (rpc level) is 
compatible with v2, but the internal dosen't.
   For example we can't rely on `RpcContext.getContext()` with v3.




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