Question

我编写了一个连接到服务器上的websocket的客户端程序。我使用示例工作设置了tomcat8，并使用我的客户端程序命中了EchoAnnotation端点。

我写了这个端点程序如下：

@ServerEndpoint(value = "/websocket")
public class PortServer implements AirMessageListener {

public PortServer() { }

@OnOpen
public void start(Session session) {
        //do stuff
}

@OnClose
public void end() {
        //do stuff
}
}

@OnMessage
public void incoming(String message) {
        //do stuff
}

@OnError
public void onError(Throwable tw) throws Throwable {
        //do stuff
}

我编译它并创建一个名为portserver的war文件并将其放入我的tomcat webapps目录中。然后我将客户端程序从连接到ws://localhost:8080/examples/websocket/echoAnnotation切换到ws://localhost:8080/portserver/websocket并运行它。我明白了：

Connecting to:ws://localhost:8080/portserver/websocket
Exception in thread "main" com.corrisoft.air.exception.AirException: Error connecting to server
    at com.corrisoft.air.socket.AirSocketClient.<init>(AirSocketClient.java:60)
    at test.corrisoft.air.portserver.SocketConversation.<init>(SocketConversation.java:46)
    at test.corrisoft.air.portserver.RunPortServerTester.initConfigProperties(RunPortServerTester.java:76)
    at test.corrisoft.air.portserver.RunPortServerTester.<init>(RunPortServerTester.java:34)
    at test.corrisoft.air.portserver.RunPortServerTester.main(RunPortServerTester.java:109)
Caused by: javax.websocket.DeploymentException: Handshake error.
    at org.glassfish.tyrus.client.ClientManager$1$1.run(ClientManager.java:466)
    at org.glassfish.tyrus.client.ClientManager$1.run(ClientManager.java:502)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.glassfish.tyrus.client.ClientManager$SameThreadExecutorService.execute(ClientManager.java:654)
    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
    at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:359)
    at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:195)
    at com.corrisoft.air.socket.AirSocketClient.<init>(AirSocketClient.java:58)
    ... 4 more
Caused by: org.glassfish.tyrus.core.HandshakeException: Response code was not 101: 404.
    at org.glassfish.tyrus.core.Handshake.validateServerResponse(Handshake.java:279)
    at org.glassfish.tyrus.client.TyrusClientEngine.processResponse(TyrusClientEngine.java:138)
    at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientFilter.handleHandshake(GrizzlyClientFilter.java:318)
    at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientFilter.handleRead(GrizzlyClientFilter.java:288)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:291)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:209)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:137)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:115)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:550)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
    at java.lang.Thread.run(Thread.java:744)

我在我的portserver应用程序中放置了一个index.html并且可以点击：http://localhost:8080/portserver就好了，这意味着目录没问题。然后我验证我的班级在我的WEB-INF / classes目录中。

我查看了这些示例，发现了我认为可能是启用端点的“魔术”类的ExamplesConfig类，所以我实现了自己的并且卡在了jar文件中。

/**
 * 
 */
package com.corrisoft.air.portserver;

import java.util.HashSet;
import java.util.Set;

import javax.websocket.Endpoint;
import javax.websocket.server.ServerApplicationConfig;
import javax.websocket.server.ServerEndpointConfig;

/**
 * @author Corrisoft Android Development
 */
public class WebSocketConfig implements ServerApplicationConfig {

    /* (non-Javadoc)
     * @see javax.websocket.server.ServerApplicationConfig#getAnnotatedEndpointClasses(java.util.Set)
     */
    @Override
    public Set<Class<?>> getAnnotatedEndpointClasses(Set<Class<?>> scanned) {
        // Deploy all WebSocket endpoints defined by annotations in the
        // web application. Filter out all others to avoid issues when running
        // tests on Gump
        Set<Class<?>> results = new HashSet<>();
        for (Class<?> clazz : scanned) {
            if (clazz.getPackage().getName().startsWith("com.corrisoft.air")) {
                System.out.println("Adding endpoint for:" + clazz.getName());
                results.add(clazz);
            }
        }
        return results;
    }

    /* (non-Javadoc)
     * @see javax.websocket.server.ServerApplicationConfig#getEndpointConfigs(java.util.Set)
     */
    @Override
    public Set<ServerEndpointConfig> getEndpointConfigs( Set<Class<? extends Endpoint>> scanned) {
        return null;
    }
}

它似乎没有运行这个类。

我错过了一些配置吗？

Answer 1

原来问题是我的一个依赖类在类路径中丢失了。在这些情况下，Tomcat 8不会添加端点，也不会在日志中引发异常。

我将相同的war文件部署到tomcat 7并获得异常。工作了类路径，直到它好了，然后部署回到现在正在工作的tomcat 8。

我在这里创建了缺陷56442：https://issues.apache.org/bugzilla/show_bug.cgi?id=56442用于tomcat吃异常而不是在日志中显示。

Answer 2

对于其他受此困扰的人;仔细看看你的URI。我根据配置文件拼凑了我的url。我错过了一个＆＃34; /＆＃34;构造URL时的字符，并确信它是正确的！如果您执行以下操作，我建议打印出构建的URL＆＃34;在追逐你的尾巴之前仔细研究：

public static final String WEBSOCKETHOST = "localhost";         // TODO: Get from configuration
public static final int WEBSOCKETPORT = 10080;                  // TODO: Get from configuration
public static final String WEBSOCKETSERVERROOT = "/sceagents";  // TODO: Get from configuration
public static final String WEBSOCKETSERVERENDPOINT = "neo";     // TODO: Get from configuration
public static final String WEBSOCKETPROTOCOL = "ws";            // TODO: Get from configuration

String uri = WEBSOCKETPROTOCOL + "://" + WEBSOCKETHOST + ":" + Integer.toString(WEBSOCKETPORT) + WEBSOCKETSERVERROOT + "/" + WEBSOCKETSERVERENDPOINT;

无法连接到我的tomcat 8 websocket

2 个答案: