Fixes spring-atticgh-549

Author: woowahankingbbode

spring-cloud-aws-messaging/src/main/java/org/springframework/cloud/aws/messaging/config/annotation/SnsWebConfiguration.java

@@ -33,16 +33,20 @@
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass("org.springframework.web.servlet.config.annotation.WebMvcConfigurer")
-public class SnsWebConfiguration implements WebMvcConfigurer {
+public class SnsWebConfiguration {
 
 	@Autowired
 	private AmazonSNS amazonSns;
 
-	@Override
-	public void addArgumentResolvers(
-			List<HandlerMethodArgumentResolver> argumentResolvers) {
-		argumentResolvers
-				.add(getNotificationHandlerMethodArgumentResolver(this.amazonSns));
+	@Bean
+	public WebMvcConfigurer snsWebMvcConfigurer() {
+		return new WebMvcConfigurer() {
+			@Override
+			public void addArgumentResolvers(
+				List<HandlerMethodArgumentResolver> argumentResolvers) {
+				argumentResolvers
+					.add(getNotificationHandlerMethodArgumentResolver(this.amazonSns));
+			}
+		}
 	}
-
 }