Fix cache annotation tip

Even if using cglib proxy mode, annotations on an interface can be recognized.

Signed-off-by: Kwangyong Kim <banana.yong@gmail.com>

spring-context/src/test/java/org/springframework/cache/config/EnableCachingIntegrationTests.java

@@ -73,6 +73,19 @@ public class EnableCachingIntegrationTests {
 		fooGetSimple(service);
 	}
 
+	@Test
+	public void barServiceWithCacheableInterfaceCglib() {
+		this.context = new AnnotationConfigApplicationContext(BarConfigCglib.class);
+		BarService service = this.context.getBean(BarService.class);
+		Cache cache = getCache();
+
+		Object key = new Object();
+		assertCacheMiss(key, cache);
+
+		Object value = service.getSimple(key);
+		assertCacheHit(key, value, cache);
+	}
+
 	private void fooGetSimple(FooService service) {
 		Cache cache = getCache();
 
@@ -184,6 +197,31 @@ public class EnableCachingIntegrationTests {
 		}
 	}
 
+	@Configuration
+	@Import(SharedConfig.class)
+	@EnableCaching(proxyTargetClass = true)
+	static class BarConfigCglib {
+
+		@Bean
+		public BarService barService() {
+			return new BarServiceImpl();
+		}
+	}
+
+	interface BarService {
+		@Cacheable(cacheNames = "testCache")
+		Object getSimple(Object key);
+	}
+
+	static class BarServiceImpl implements BarService {
+
+		private final AtomicLong counter = new AtomicLong();
+
+		@Override
+		public Object getSimple(Object key) {
+			return this.counter.getAndIncrement();
+		}
+	}
 
 	@Configuration
 	@Import(FooConfig.class)