I am trying to configure web sockets with spring using a Wildfly 10 server. As per this tutorial, I have the following files:
This is the web socket class:
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();
}
}
This is the web socket config file:
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();
}
}
This is my 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>
According to the tutorial, this is all I have to do. But I get the following errors:
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
What is the fix to this problem? In addition, are there any other config files I need to add in order for my web socket to be mapped correctly at the endpoint /serverendpoint as I did in my serverendpoint() class (I am asking this because I am a bit unsure if I only need one config file or not. It doesn't seem right. I looked around and others have included other files with, for instance, the @EnableWebSocket, but the tutorial says that I only need these two files.)?
Thank you so much!
