ScheduledAnnotationBeanPostProcessor properly deals with nested proxies

Issue: SPR-16196

Author: jhoeller

spring-context/src/main/java/org/springframework/scheduling/annotation/ScheduledAnnotationBeanPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,6 +32,7 @@
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
+import org.springframework.aop.framework.AopProxyUtils;
 import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.BeanFactoryAware;
@@ -311,7 +312,7 @@ public Object postProcessBeforeInitialization(Object bean, String beanName) {
 
 	@Override
 	public Object postProcessAfterInitialization(final Object bean, String beanName) {
-		Class<?> targetClass = AopUtils.getTargetClass(bean);
+		Class<?> targetClass = AopProxyUtils.ultimateTargetClass(bean);
 		if (!this.nonAnnotatedClasses.contains(targetClass)) {
 			Map<Method, Set<Scheduled>> annotatedMethods = MethodIntrospector.selectMethods(targetClass,
 					(MethodIntrospector.MetadataLookup<Set<Scheduled>>) method -> {

spring-context/src/test/java/org/springframework/scheduling/annotation/ScheduledAnnotationBeanPostProcessorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,6 +33,7 @@
 import org.junit.After;
 import org.junit.Test;
 
+import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.beans.DirectFieldAccessor;
 import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.beans.factory.config.BeanDefinition;
@@ -179,6 +180,14 @@ public void severalFixedRatesOnDefaultMethod() {
 		severalFixedRates(context, processorDefinition, targetDefinition);
 	}
 
+	@Test
+	public void severalFixedRatesAgainstNestedCglibProxy() {
+		BeanDefinition processorDefinition = new RootBeanDefinition(ScheduledAnnotationBeanPostProcessor.class);
+		BeanDefinition targetDefinition = new RootBeanDefinition(SeveralFixedRatesWithRepeatedScheduledAnnotationTestBean.class);
+		targetDefinition.setFactoryMethodName("nestedProxy");
+		severalFixedRates(context, processorDefinition, targetDefinition);
+	}
+
 	private void severalFixedRates(StaticApplicationContext context,
 			BeanDefinition processorDefinition, BeanDefinition targetDefinition) {
 
@@ -631,6 +640,14 @@ static class SeveralFixedRatesWithRepeatedScheduledAnnotationTestBean {
 		@Scheduled(fixedRate = 4000, initialDelay = 2000)
 		public void fixedRate() {
 		}
+
+		static SeveralFixedRatesWithRepeatedScheduledAnnotationTestBean nestedProxy() {
+			ProxyFactory pf1 = new ProxyFactory(new SeveralFixedRatesWithRepeatedScheduledAnnotationTestBean());
+			pf1.setProxyTargetClass(true);
+			ProxyFactory pf2 = new ProxyFactory(pf1.getProxy());
+			pf2.setProxyTargetClass(true);
+			return (SeveralFixedRatesWithRepeatedScheduledAnnotationTestBean) pf2.getProxy();
+		}
 	}