/* * Copyright 2002-2018 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * https://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package org.springframework.web.reactive.socket.server.support;import reactor.core.publisher.Mono;import org.springframework.util.Assert;import org.springframework.web.reactive.DispatcherHandler;import org.springframework.web.reactive.HandlerAdapter;import org.springframework.web.reactive.HandlerResult;import org.springframework.web.reactive.socket.WebSocketHandler;import org.springframework.web.reactive.socket.server.WebSocketService;import org.springframework.web.server.ServerWebExchange;/** * {@link HandlerAdapter} that allows using a {@link WebSocketHandler} with the * generic {@link DispatcherHandler} mapping URLs directly to such handlers. * Requests are handled by delegating to the configured {@link WebSocketService} * which by default is {@link HandshakeWebSocketService}. * * @author Rossen Stoyanchev * @since 5.0 */public class WebSocketHandlerAdapter implements HandlerAdapter { private final WebSocketService webSocketService; /** * Default constructor that creates and uses a * {@link HandshakeWebSocketService}. */ public WebSocketHandlerAdapter() { this(new HandshakeWebSocketService()); } /** * Alternative constructor with the {@link WebSocketService} to use. */ public WebSocketHandlerAdapter(WebSocketService webSocketService) { Assert.notNull(webSocketService, "'webSocketService' is required"); this.webSocketService = webSocketService; } /** * Return the configured {@code WebSocketService} to handle requests. */ public WebSocketService getWebSocketService() { return this.webSocketService; } @Override public boolean supports(Object handler) { return WebSocketHandler.class.isAssignableFrom(handler.getClass()); } @Override public Mono<HandlerResult> handle(ServerWebExchange exchange, Object handler) { WebSocketHandler webSocketHandler = (WebSocketHandler) handler; return getWebSocketService().handleRequest(exchange, webSocketHandler).then(Mono.empty());