Parse cache:annotation-driven key-generator attribute

Prior to this change, the spring-cache XSD allowed a 'key-generator'
attribute, but it was not actually parsed by AnnotationDrivenCacheBDP.

This commit adds the parsing logic as originally intended and the test
to prove it.

Issue: SPR-8939

org.springframework.aspects/src/test/java/org/springframework/cache/aspectj/AspectJAnnotationTest.java

@@ -16,6 +16,8 @@
 
 package org.springframework.cache.aspectj;
 
+import org.junit.Assert;
+import org.junit.Test;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.GenericXmlApplicationContext;
 
@@ -30,4 +32,10 @@ public class AspectJAnnotationTest extends AbstractAnnotationTest {
 	protected ApplicationContext getApplicationContext() {
 		return new GenericXmlApplicationContext("/org/springframework/cache/config/annotation-cache-aspectj.xml");
 	}
+
+	@Test
+	public void testKeyStrategy() throws Exception {
+		AnnotationCacheAspect aspect = ctx.getBean("org.springframework.cache.config.internalCacheAspect", AnnotationCacheAspect.class);
+		Assert.assertSame(ctx.getBean("keyGenerator"), aspect.getKeyGenerator());
+	}
 }

org.springframework.aspects/src/test/java/org/springframework/cache/config/SomeKeyGenerator.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2002-2011 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.
+ * 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.springframework.cache.config;
+
+import org.springframework.cache.interceptor.DefaultKeyGenerator;
+
+public class SomeKeyGenerator extends DefaultKeyGenerator {
+
+}

org.springframework.aspects/src/test/java/org/springframework/cache/config/annotation-cache-aspectj.xml

@@ -14,7 +14,7 @@
 	<aop:config>
 		<aop:advisor advice-ref="debugInterceptor" pointcut="execution(* *..CacheableService.*(..))" order="1"/>
 	</aop:config>
-	
+
 	<bean id="cacheAspect" class="org.springframework.cache.aspectj.AnnotationCacheAspect" factory-method="aspectOf">
 		<property name="cacheManager" ref="cacheManager"/>
 		<property name="cacheOperationSources" ref="annotationSource"/>
@@ -22,8 +22,10 @@
 
 	<bean id="annotationSource" class="org.springframework.cache.annotation.AnnotationCacheOperationSource"/>
 	-->
-	 
-	<cache:annotation-driven mode="aspectj"/>
+
+	<cache:annotation-driven mode="aspectj" key-generator="keyGenerator"/>
+
+	<bean id="keyGenerator" class="org.springframework.cache.config.SomeKeyGenerator" />
 
 	<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
 		<property name="caches">
@@ -36,8 +38,8 @@
 	</bean>
 
 	<bean id="debugInterceptor" class="org.springframework.aop.interceptor.DebugInterceptor"/>
-	
+
 	<bean id="service" class="org.springframework.cache.config.DefaultCacheableService"/>
 	<bean id="classService" class="org.springframework.cache.config.AnnotatedClassCacheableService"/>
 
-</beans>
+</beans>

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

@@ -76,7 +76,8 @@ class AnnotationDrivenCacheBeanDefinitionParser implements BeanDefinitionParser
 	 * Registers a
 	 * <pre>
 	 * <bean id="cacheAspect" class="org.springframework.cache.aspectj.AnnotationCacheAspect" factory-method="aspectOf">
-	 *   <property name="cacheManagerBeanName" value="cacheManager"/>
+	 *   <property name="cacheManager" ref="cacheManager"/>
+	 *   <property name="keyGenerator" ref="keyGenerator"/>
 	 * </bean>
 	 *
 	 * </pre>
@@ -89,6 +90,7 @@ class AnnotationDrivenCacheBeanDefinitionParser implements BeanDefinitionParser
 			def.setBeanClassName(CACHE_ASPECT_CLASS_NAME);
 			def.setFactoryMethodName("aspectOf");
 			parseCacheManagerProperty(element, def);
+			CacheNamespaceHandler.parseKeyGenerator(element, def);
 			parserContext.registerBeanComponent(new BeanComponentDefinition(def, CACHE_ASPECT_BEAN_NAME));
 		}
 	}