Update order of method in WebReactiveConfigurer

spring-web-reactive/src/main/java/org/springframework/web/reactive/config/WebReactiveConfigurer.java

@@ -31,15 +31,6 @@ import org.springframework.web.reactive.result.method.annotation.RequestMappingH
  */
 public interface WebReactiveConfigurer {
 
-	/**
-	 * Provide a custom sub-class of {@link RequestMappingHandlerMapping}
-	 * instead of the one created by default.
-	 * The default implementation returns {@code Optional.empty()}.
-	 */
-	default Optional<RequestMappingHandlerMapping> createRequestMappingHandlerMapping() {
-		return Optional.empty();
-	}
-
 	/**
 	 * Configure how the requested content type is resolved.
 	 * <p>The given builder will create a composite of multiple
@@ -73,15 +64,6 @@ public interface WebReactiveConfigurer {
 	default void addResourceHandlers(ResourceHandlerRegistry registry) {
 	}
 
-	/**
-	 * Provide a custom sub-class of {@link RequestMappingHandlerAdapter}
-	 * instead of the one created by default.
-	 * The default implementation returns {@code Optional.empty()}.
-	 */
-	default Optional<RequestMappingHandlerAdapter> createRequestMappingHandlerAdapter() {
-		return Optional.empty();
-	}
-
 	/**
 	 * Provide custom argument resolvers without overriding the built-in ones.
 	 * @param resolvers a list of resolvers to add to the built-in ones
@@ -93,16 +75,16 @@ public interface WebReactiveConfigurer {
 	 * Configure the message readers to use for decoding controller method arguments.
 	 * <p>If no message readers are specified, default readers will be added via
 	 * {@link WebReactiveConfigurationSupport#addDefaultHttpMessageReaders}.
-	 * @param messageReaders a list to add message readers to, initially an empty list
+	 * @param readers a list to add message readers to, initially an empty list
 	 */
-	default void configureMessageReaders(List<HttpMessageReader<?>> messageReaders) {
+	default void configureMessageReaders(List<HttpMessageReader<?>> readers) {
 	}
 
 	/**
 	 * Modify the list of message readers to use for decoding controller method arguments,
 	 * for example to add some in addition to the ones already configured.
 	 */
-	default void extendMessageReaders(List<HttpMessageReader<?>> messageReaders) {
+	default void extendMessageReaders(List<HttpMessageReader<?>> readers) {
 	}
 
 	/**
@@ -134,16 +116,16 @@ public interface WebReactiveConfigurer {
 	 * Configure the message writers to use for encoding return values.
 	 * <p>If no message writers are specified, default writers will be added via
 	 * {@link WebReactiveConfigurationSupport#addDefaultHttpMessageWriters(List)}.
-	 * @param messageWriters a list to add message writers to, initially an empty list
+	 * @param writers a list to add message writers to, initially an empty list
 	 */
-	default void configureMessageWriters(List<HttpMessageWriter<?>> messageWriters) {
+	default void configureMessageWriters(List<HttpMessageWriter<?>> writers) {
 	}
 
 	/**
 	 * Modify the list of message writers to use for encoding return values,
 	 * for example to add some in addition to the ones already configured.
 	 */
-	default void extendMessageWriters(List<HttpMessageWriter<?>> messageWriters) {
+	default void extendMessageWriters(List<HttpMessageWriter<?>> writers) {
 	}
 
 	/**
@@ -153,4 +135,24 @@ public interface WebReactiveConfigurer {
 	default void configureViewResolvers(ViewResolverRegistry registry) {
 	}
 
+	/**
+	 * Factory method for the {@link RequestMappingHandlerMapping} bean creating
+	 * an instance or a custom extension of it. Note that only one configurer
+	 * is allowed to implement this method.
+	 * The default implementation returns {@code Optional.empty()}.
+	 */
+	default Optional<RequestMappingHandlerMapping> createRequestMappingHandlerMapping() {
+		return Optional.empty();
+	}
+
+	/**
+	 * Factory method for the {@link RequestMappingHandlerAdapter} bean creating
+	 * an instance or a custom extension of it. Note that only one configurer
+	 * is allowed to implement this method.
+	 * The default implementation returns {@code Optional.empty()}.
+	 */
+	default Optional<RequestMappingHandlerAdapter> createRequestMappingHandlerAdapter() {
+		return Optional.empty();
+	}
+
 }

spring-web-reactive/src/main/java/org/springframework/web/reactive/config/WebReactiveConfigurerComposite.java

@@ -36,12 +36,6 @@ public class WebReactiveConfigurerComposite implements WebReactiveConfigurer {
 	}
 
 
-	@Override
-	public Optional<RequestMappingHandlerMapping> createRequestMappingHandlerMapping() {
-		return createSingleBean(WebReactiveConfigurer::createRequestMappingHandlerMapping,
-				RequestMappingHandlerMapping.class);
-	}
-
 	@Override
 	public void configureRequestedContentTypeResolver(RequestedContentTypeResolverBuilder builder) {
 		this.delegates.stream().forEach(delegate -> delegate.configureRequestedContentTypeResolver(builder));
@@ -62,25 +56,19 @@ public class WebReactiveConfigurerComposite implements WebReactiveConfigurer {
 		this.delegates.stream().forEach(delegate -> delegate.addResourceHandlers(registry));
 	}
 
-	@Override
-	public Optional<RequestMappingHandlerAdapter> createRequestMappingHandlerAdapter() {
-		return createSingleBean(WebReactiveConfigurer::createRequestMappingHandlerAdapter,
-				RequestMappingHandlerAdapter.class);
-	}
-
 	@Override
 	public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
 		this.delegates.stream().forEach(delegate -> delegate.addArgumentResolvers(resolvers));
 	}
 
 	@Override
-	public void configureMessageReaders(List<HttpMessageReader<?>> messageReaders) {
-		this.delegates.stream().forEach(delegate -> delegate.configureMessageReaders(messageReaders));
+	public void configureMessageReaders(List<HttpMessageReader<?>> readers) {
+		this.delegates.stream().forEach(delegate -> delegate.configureMessageReaders(readers));
 	}
 
 	@Override
-	public void extendMessageReaders(List<HttpMessageReader<?>> messageReaders) {
-		this.delegates.stream().forEach(delegate -> delegate.extendMessageReaders(messageReaders));
+	public void extendMessageReaders(List<HttpMessageReader<?>> readers) {
+		this.delegates.stream().forEach(delegate -> delegate.extendMessageReaders(readers));
 	}
 
 	@Override
@@ -99,13 +87,13 @@ public class WebReactiveConfigurerComposite implements WebReactiveConfigurer {
 	}
 
 	@Override
-	public void configureMessageWriters(List<HttpMessageWriter<?>> messageWriters) {
-		this.delegates.stream().forEach(delegate -> delegate.configureMessageWriters(messageWriters));
+	public void configureMessageWriters(List<HttpMessageWriter<?>> writers) {
+		this.delegates.stream().forEach(delegate -> delegate.configureMessageWriters(writers));
 	}
 
 	@Override
-	public void extendMessageWriters(List<HttpMessageWriter<?>> messageWriters) {
-		this.delegates.stream().forEach(delegate -> delegate.extendMessageWriters(messageWriters));
+	public void extendMessageWriters(List<HttpMessageWriter<?>> writers) {
+		this.delegates.stream().forEach(delegate -> delegate.extendMessageWriters(writers));
 	}
 
 	@Override
@@ -113,6 +101,18 @@ public class WebReactiveConfigurerComposite implements WebReactiveConfigurer {
 		this.delegates.stream().forEach(delegate -> delegate.configureViewResolvers(registry));
 	}
 
+	@Override
+	public Optional<RequestMappingHandlerMapping> createRequestMappingHandlerMapping() {
+		return createSingleBean(WebReactiveConfigurer::createRequestMappingHandlerMapping,
+				RequestMappingHandlerMapping.class);
+	}
+
+	@Override
+	public Optional<RequestMappingHandlerAdapter> createRequestMappingHandlerAdapter() {
+		return createSingleBean(WebReactiveConfigurer::createRequestMappingHandlerAdapter,
+				RequestMappingHandlerAdapter.class);
+	}
+
 	private <T> Optional<T> createSingleBean(Function<WebReactiveConfigurer, Optional<T>> factory,
 			Class<T> beanType) {