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 */ 016package org.springframework.web.reactive.socket.server.support; 017 018import reactor.core.publisher.Mono; 019 020import org.springframework.util.Assert; 021import org.springframework.web.reactive.DispatcherHandler; 022import org.springframework.web.reactive.HandlerAdapter; 023import org.springframework.web.reactive.HandlerResult; 024import org.springframework.web.reactive.socket.WebSocketHandler; 025import org.springframework.web.reactive.socket.server.WebSocketService; 026import org.springframework.web.server.ServerWebExchange; 027 028/** 029 * {@link HandlerAdapter} that allows using a {@link WebSocketHandler} with the 030 * generic {@link DispatcherHandler} mapping URLs directly to such handlers. 031 * Requests are handled by delegating to the configured {@link WebSocketService} 032 * which by default is {@link HandshakeWebSocketService}. 033 * 034 * @author Rossen Stoyanchev 035 * @since 5.0 036 */ 037public class WebSocketHandlerAdapter implements HandlerAdapter { 038 039 private final WebSocketService webSocketService; 040 041 042 /** 043 * Default constructor that creates and uses a 044 * {@link HandshakeWebSocketService}. 045 */ 046 public WebSocketHandlerAdapter() { 047 this(new HandshakeWebSocketService()); 048 } 049 050 /** 051 * Alternative constructor with the {@link WebSocketService} to use. 052 */ 053 public WebSocketHandlerAdapter(WebSocketService webSocketService) { 054 Assert.notNull(webSocketService, "'webSocketService' is required"); 055 this.webSocketService = webSocketService; 056 } 057 058 059 /** 060 * Return the configured {@code WebSocketService} to handle requests. 061 */ 062 public WebSocketService getWebSocketService() { 063 return this.webSocketService; 064 } 065 066 067 @Override 068 public boolean supports(Object handler) { 069 return WebSocketHandler.class.isAssignableFrom(handler.getClass()); 070 } 071 072 @Override 073 public Mono<HandlerResult> handle(ServerWebExchange exchange, Object handler) { 074 WebSocketHandler webSocketHandler = (WebSocketHandler) handler; 075 return getWebSocketService().handleRequest(exchange, webSocketHandler).then(Mono.empty()); 076 } 077 078}