feign eager 适配 aop

spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/eager/instrument/feign/FeignEagerLoadSmartLifecycle.java

@@ -28,6 +28,8 @@ import feign.Target;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.springframework.aop.framework.AopProxy;
+import org.springframework.aop.framework.JdkDynamicAopProxyUtils;
 import org.springframework.cloud.openfeign.FeignClient;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.SmartLifecycle;
@@ -93,7 +95,17 @@ public class FeignEagerLoadSmartLifecycle implements SmartLifecycle {
 
 	public static Target.HardCodedTarget<?> getHardCodedTarget(Object proxy) {
 		try {
-			Object invocationHandler = Proxy.getInvocationHandler(proxy);
+			int count = 0;
+			Object invocationHandler = proxy;
+			// 避免死循环
+			while (count++ < 100) {
+				invocationHandler = Proxy.getInvocationHandler(invocationHandler);
+				if (invocationHandler instanceof AopProxy) {
+					invocationHandler = JdkDynamicAopProxyUtils.getTarget(invocationHandler);
+					continue;
+				}
+				break;
+			}
 
 			for (Field field : invocationHandler.getClass().getDeclaredFields()) {
 				field.setAccessible(true);

spring-cloud-starter-tencent-polaris-discovery/src/main/java/org/springframework/aop/framework/JdkDynamicAopProxyUtils.java

@@ -0,0 +1,50 @@
+/*
+ * Tencent is pleased to support the open source community by making spring-cloud-tencent available.
+ *
+ * Copyright (C) 2021 Tencent. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * 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.springframework.aop.framework;
+
+import java.lang.reflect.Field;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class JdkDynamicAopProxyUtils {
+
+	private static final Logger LOGGER = LoggerFactory.getLogger(JdkDynamicAopProxyUtils.class);
+
+	private JdkDynamicAopProxyUtils() {
+	}
+
+	public static Object getTarget(Object invocationHandler) {
+		if (invocationHandler instanceof JdkDynamicAopProxy) {
+			try {
+				JdkDynamicAopProxy jdkDynamicAopProxy = (JdkDynamicAopProxy) invocationHandler;
+				Field advisedField = JdkDynamicAopProxy.class.getDeclaredField("advised");
+				advisedField.setAccessible(true);
+				AdvisedSupport advisedSupport = (AdvisedSupport) advisedField.get(jdkDynamicAopProxy);
+
+				if (advisedSupport != null && advisedSupport.getTargetSource() != null) {
+					return advisedSupport.getTargetSource().getTarget();
+				}
+			}
+			catch (Exception e) {
+				LOGGER.error("Unexpected error occurred while getting target from JdkDynamicAopProxy", e);
+			}
+		}
+		return null;
+	}
+}