001/* 002 * Copyright 2002-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.web.reactive.result; 018 019import reactor.core.publisher.Mono; 020 021import org.springframework.web.reactive.DispatcherHandler; 022import org.springframework.web.reactive.HandlerAdapter; 023import org.springframework.web.reactive.HandlerResult; 024import org.springframework.web.server.ServerWebExchange; 025import org.springframework.web.server.WebHandler; 026 027/** 028 * {@link HandlerAdapter} that allows using the plain {@link WebHandler} contract 029 * with the generic {@link DispatcherHandler}. 030 * 031 * @author Rossen Stoyanchev 032 * @author Sebastien Deleuze 033 * @since 5.0 034 */ 035public class SimpleHandlerAdapter implements HandlerAdapter { 036 037 @Override 038 public boolean supports(Object handler) { 039 return WebHandler.class.isAssignableFrom(handler.getClass()); 040 } 041 042 @Override 043 public Mono<HandlerResult> handle(ServerWebExchange exchange, Object handler) { 044 WebHandler webHandler = (WebHandler) handler; 045 Mono<Void> mono = webHandler.handle(exchange); 046 return mono.then(Mono.empty()); 047 } 048 049}