Switch to functional web code to use static imports

Update the samples and tests to use the more idiomatic static import
style.

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/MappingsEndpointReactiveDocumentationTests.java

@@ -45,9 +45,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.test.web.reactive.server.WebTestClient;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RestController;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerResponse;
 
 import static org.springframework.restdocs.payload.PayloadDocumentation.beneathPath;
@@ -55,6 +53,8 @@ import static org.springframework.restdocs.payload.PayloadDocumentation.fieldWit
 import static org.springframework.restdocs.payload.PayloadDocumentation.responseFields;
 import static org.springframework.restdocs.webtestclient.WebTestClientRestDocumentation.document;
 import static org.springframework.restdocs.webtestclient.WebTestClientRestDocumentation.documentationConfiguration;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
 
 /**
  * Tests for generating documentation describing {@link MappingsEndpoint}.
@@ -191,8 +191,7 @@ public class MappingsEndpointReactiveDocumentationTests
 
 		@Bean
 		public RouterFunction<ServerResponse> exampleRouter() {
-			return RouterFunctions.route(RequestPredicates.GET("/foo"),
+			return route(GET("/foo"), (request) -> ServerResponse.ok().build());
-					(request) -> ServerResponse.ok().build());
 		}
 
 		@Bean

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/trace/http/reactive/HttpTraceWebFilterIntegrationTests.java

@@ -36,13 +36,13 @@ import org.springframework.http.server.reactive.HttpHandler;
 import org.springframework.test.web.reactive.server.WebTestClient;
 import org.springframework.web.reactive.config.EnableWebFlux;
 import org.springframework.web.reactive.function.server.HandlerFunction;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerResponse;
 import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
 
 /**
  * Integration tests for {@link HttpTraceWebFilter}.
@@ -115,10 +115,9 @@ public class HttpTraceWebFilterIntegrationTests {
 
 		@Bean
 		public RouterFunction<ServerResponse> router() {
-			return RouterFunctions
+			return route(GET("/mono-error"),
-					.route(RequestPredicates.GET("/mono-error"),
+					(request) -> Mono.error(new RuntimeException())).andRoute(
-							(request) -> Mono.error(new RuntimeException()))
+							GET("/thrown"),
-					.andRoute(RequestPredicates.GET("/thrown"),
 							(HandlerFunction<ServerResponse>) (request) -> {
 								throw new RuntimeException();
 							});

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/web/mappings/MappingsEndpointTests.java

@@ -51,9 +51,7 @@ import org.springframework.web.context.ConfigurableWebApplicationContext;
 import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
 import org.springframework.web.reactive.config.EnableWebFlux;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerResponse;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@@ -61,6 +59,9 @@ import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
 
 /**
  * Tests for {@link MappingsEndpoint}.
@@ -166,11 +167,8 @@ public class MappingsEndpointTests {
 
 		@Bean
 		public RouterFunction<ServerResponse> routerFunction() {
-			return RouterFunctions
+			return route(GET("/one"), (request) -> ServerResponse.ok().build())
-					.route(RequestPredicates.GET("/one"),
+					.andRoute(POST("/two"), (request) -> ServerResponse.ok().build());
-							(request) -> ServerResponse.ok().build())
-					.andRoute(RequestPredicates.POST("/two"),
-							(request) -> ServerResponse.ok().build());
 		}
 
 		@RequestMapping("/three")

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/DefaultErrorWebExceptionHandler.java

@@ -35,13 +35,14 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.web.reactive.function.BodyInserters;
 import org.springframework.web.reactive.function.server.RequestPredicate;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerRequest;
 import org.springframework.web.reactive.function.server.ServerResponse;
 import org.springframework.web.server.ResponseStatusException;
 
+import static org.springframework.web.reactive.function.server.RequestPredicates.all;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+
 /**
  * Basic global {@link org.springframework.web.server.WebExceptionHandler}, rendering
  * {@link ErrorAttributes}.
@@ -106,8 +107,8 @@ public class DefaultErrorWebExceptionHandler extends AbstractErrorWebExceptionHa
 	@Override
 	protected RouterFunction<ServerResponse> getRoutingFunction(
 			ErrorAttributes errorAttributes) {
-		return RouterFunctions.route(acceptsTextHtml(), this::renderErrorView)
+		return route(acceptsTextHtml(), this::renderErrorView).andRoute(all(),
-				.andRoute(RequestPredicates.all(), this::renderErrorResponse);
+				this::renderErrorResponse);
 	}
 
 	/**

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/HttpHandlerAutoConfigurationTests.java

@@ -23,12 +23,12 @@ import org.springframework.boot.test.context.runner.ReactiveWebApplicationContex
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.server.reactive.HttpHandler;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerResponse;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
 
 /**
  * Tests for {@link HttpHandlerAutoConfiguration}.
@@ -69,8 +69,7 @@ public class HttpHandlerAutoConfigurationTests {
 
 		@Bean
 		public RouterFunction<ServerResponse> routerFunction() {
-			return RouterFunctions.route(RequestPredicates.GET("/test"),
+			return route(GET("/test"), (serverRequest) -> null);
-					(serverRequest) -> null);
 		}
 
 	}

spring-boot-samples/spring-boot-sample-secure-webflux/src/main/java/sample/secure/webflux/SampleSecureWebFluxApplication.java

@@ -19,11 +19,12 @@ package sample.secure.webflux;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerResponse;
 
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+
 @SpringBootApplication
 public class SampleSecureWebFluxApplication {
 
@@ -33,7 +34,7 @@ public class SampleSecureWebFluxApplication {
 
 	@Bean
 	public RouterFunction<ServerResponse> monoRouterFunction(EchoHandler echoHandler) {
-		return RouterFunctions.route(RequestPredicates.POST("/echo"), echoHandler::echo);
+		return route(POST("/echo"), echoHandler::echo);
 	}
 
 }

spring-boot-samples/spring-boot-sample-webflux/src/main/java/sample/webflux/SampleWebFluxApplication.java

@@ -19,11 +19,12 @@ package sample.webflux;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
-import org.springframework.web.reactive.function.server.RequestPredicates;
 import org.springframework.web.reactive.function.server.RouterFunction;
-import org.springframework.web.reactive.function.server.RouterFunctions;
 import org.springframework.web.reactive.function.server.ServerResponse;
 
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+
 @SpringBootApplication
 public class SampleWebFluxApplication {
 
@@ -33,7 +34,7 @@ public class SampleWebFluxApplication {
 
 	@Bean
 	public RouterFunction<ServerResponse> monoRouterFunction(EchoHandler echoHandler) {
-		return RouterFunctions.route(RequestPredicates.POST("/echo"), echoHandler::echo);
+		return route(POST("/echo"), echoHandler::echo);
 	}
 
 }