使用 spring 启用 WebSockets

Question

我正在尝试使用 Wildfly 10 服务器配置带有 spring 的 Web 套接字。根据this 教程，我有以下文件：

这是网络套接字类：

package com.myapp.spring.web.controller;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.server.ServerEndpoint;

import org.springframework.web.socket.server.standard.SpringConfigurator;


@ServerEndpoint(value="/serverendpoint", configurator = SpringConfigurator.class)

/**
 * This class creates web sockets, opens, and maintains connection with the client
 */
public class serverendpoint {


    @OnOpen
    public void handleOpen () {
        System.out.println("JAVA: Client is now connected...");
    }

    @OnMessage
    public String handleMessage (String message) {

        if (message.equals("ping"))
            return "pong";
        else if (message.equals("close")) {
            handleClose();
            return null;
        }
        System.out.println("JAVA: Received from client: "+ message);
        if (message.contains("//")) {
            MyClass mc = new MyClass(message);
            return mc.someMethod();
        } else {
            System.out.println("Message From Web Socket Not Understood");
            return null;
        }
    }

    @OnClose
    public void handleClose() {
        System.out.println("JAVA: Client is now disconnected...");
    }

    @OnError
    public void handleError (Throwable t) {
        t.printStackTrace();
    }
}

这是网络套接字配置文件：

package com.myapp.spring.security.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
import com.myapp.spring.web.controller.serverendpoint;

@Configuration
public class EndpointConfig {

    @Bean
    public serverendpoint serverendpoint() {
        return new serverendpoint();
    }

    @Bean
    public ServerEndpointExporter endpointExporter() {
        return new ServerEndpointExporter();
    }

}

这是我的pom.xml：

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency> 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>

根据教程，这就是我所要做的。但我收到以下错误：

Failed to start service jboss.undertow.deployment.default-server.default-host./ROOT: org.jboss.msc.service.StartException in service jboss.undertow.deployment.default-server.default-host./ROOT: java.lang.RuntimeException: java.lang.ClassCastException: org.apache.tomcat.websocket.server.WsServerContainer cannot be cast to io.undertow.websockets.jsr.ServerWebSocketContainer
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:85)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
    at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.RuntimeException: java.lang.ClassCastException: org.apache.tomcat.websocket.server.WsServerContainer cannot be cast to io.undertow.websockets.jsr.ServerWebSocketContainer
    at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:231)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:100)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:82)
    ... 6 more
Caused by: java.lang.ClassCastException: org.apache.tomcat.websocket.server.WsServerContainer cannot be cast to io.undertow.websockets.jsr.ServerWebSocketContainer
    at io.undertow.websockets.jsr.Bootstrap$WebSocketListener.contextInitialized(Bootstrap.java:104)
    at io.undertow.servlet.core.ApplicationListeners.contextInitialized(ApplicationListeners.java:187)
    at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:198)
    ... 8 more

解决这个问题的方法是什么？此外，我需要添加任何其他配置文件，以便我的 web 套接字在端点 /serverendpoint 上正确映射，就像我在 serverendpoint() 类中所做的那样（我问这个是因为我有点不确定是否我是否只需要一个配置文件。似乎不对。我环顾四周，others 包含了其他文件，例如@EnableWebSocket，但教程说我只需要这两个文件。） ?

非常感谢！

Answer 1

请通过https://github.com/spring-projects/spring-boot/issues/6166 看看这是否能解决您的问题。 在Spring Boot Websockets in Wildfly 的 SO 中报告了一个类似的问题。希望这会有所帮助。