Introduce test for gh-27499 and polish contribution

Author: sbrannen

spring-aspects/src/test/java/org/springframework/cache/aspectj/JCacheAspectJNamespaceConfigTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -22,13 +22,18 @@
 
 /**
  * @author Stephane Nicoll
+ * @author Sam Brannen
  */
 public class JCacheAspectJNamespaceConfigTests extends AbstractJCacheAnnotationTests {
 
 	@Override
 	protected ApplicationContext getApplicationContext() {
-		return new GenericXmlApplicationContext(
-				"/org/springframework/cache/config/annotation-jcache-aspectj.xml");
+		GenericXmlApplicationContext context = new GenericXmlApplicationContext();
+		// Disallow bean definition overriding to test https://github.com/spring-projects/spring-framework/pull/27499
+		context.setAllowBeanDefinitionOverriding(false);
+		context.load("/org/springframework/cache/config/annotation-jcache-aspectj.xml");
+		context.refresh();
+		return context;
 	}
 
 }

spring-context/src/main/java/org/springframework/cache/config/AnnotationDrivenCacheBeanDefinitionParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -244,20 +244,20 @@ private static void registerCacheAdvisor(Element element, ParserContext parserCo
 
 		private static void registerCacheAspect(Element element, ParserContext parserContext) {
 			if (!parserContext.getRegistry().containsBeanDefinition(CacheManagementConfigUtils.JCACHE_ASPECT_BEAN_NAME)) {
-				Object eleSource = parserContext.extractSource(element);
+				Object source = parserContext.extractSource(element);
 
-				BeanDefinition sourceDef = createJCacheOperationSourceBeanDefinition(element, eleSource);
-				String sourceName = parserContext.getReaderContext().registerWithGeneratedName(sourceDef);
+				BeanDefinition cacheOperationSourceDef = createJCacheOperationSourceBeanDefinition(element, source);
+				String cacheOperationSourceName = parserContext.getReaderContext().registerWithGeneratedName(cacheOperationSourceDef);
 
-				RootBeanDefinition def = new RootBeanDefinition();
-				def.setBeanClassName(JCACHE_ASPECT_CLASS_NAME);
-				def.setFactoryMethodName("aspectOf");
-				def.getPropertyValues().add("cacheOperationSource", new RuntimeBeanReference(sourceName));
-				parserContext.getRegistry().registerBeanDefinition(CacheManagementConfigUtils.JCACHE_ASPECT_BEAN_NAME, def);
+				RootBeanDefinition jcacheAspectDef = new RootBeanDefinition();
+				jcacheAspectDef.setBeanClassName(JCACHE_ASPECT_CLASS_NAME);
+				jcacheAspectDef.setFactoryMethodName("aspectOf");
+				jcacheAspectDef.getPropertyValues().add("cacheOperationSource", new RuntimeBeanReference(cacheOperationSourceName));
+				parserContext.getRegistry().registerBeanDefinition(CacheManagementConfigUtils.JCACHE_ASPECT_BEAN_NAME, jcacheAspectDef);
 
-				CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(element.getTagName(), eleSource);
-				compositeDef.addNestedComponent(new BeanComponentDefinition(sourceDef, sourceName));
-				compositeDef.addNestedComponent(new BeanComponentDefinition(def, CacheManagementConfigUtils.JCACHE_ASPECT_BEAN_NAME));
+				CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(element.getTagName(), source);
+				compositeDef.addNestedComponent(new BeanComponentDefinition(cacheOperationSourceDef, cacheOperationSourceName));
+				compositeDef.addNestedComponent(new BeanComponentDefinition(jcacheAspectDef, CacheManagementConfigUtils.JCACHE_ASPECT_BEAN_NAME));
 				parserContext.registerComponent(compositeDef);
 			}
 		}