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为什么websocket的以下代码（dukeetf2）不起作用？

[英]Why the following code (dukeetf2 ) of websocket does not work?

 原文  2013-11-19 05:40:23  8   1    java/ oracle/ maven/ websocket

问题描述

I have downloaded dukeetf2 tutorial of oracle but it does not work (when I run it nothing happens although it is supposed to update the page every second). 我已经下载了Oracle的dukeetf2教程，但是它不起作用（当我运行它时，虽然应该每秒更新一次页面，但是没有任何反应）。 It seems the browser is sending the requests but does not update the page as I have the following results in console. 看来浏览器发送请求，但正如我在控制台下面的结果不更新页面。 

SEVERE: in init
INFO: Initializing EJB.
INFO: JTS5014: Recoverable JTS instance, serverId = [100]
INFO: WEB0671: Loading application [org.glassfish.javaeetutorial_dukeetf2_war_7.0.4-SNAPSHOT] at [/dukeetf2]
INFO: CORE10010: Loading application org.glassfish.javaeetutorial_dukeetf2_war_7.0.4-SNAPSHOT done in 6,908 ms
INFO: GlassFish Server Open Source Edition 3.1.2.2 (5) startup time : Felix (2,692ms), startup services(117,706ms), total(120,398ms)
INFO: JMX005: JMXStartupService had Started JMXConnector on JMXService URL service:jmx:rmi://Workstation9:8686/jndi/rmi://Workstation9:8686/jmxrmi
SEVERE: in timeout
SEVERE: in send
SEVERE: in timeout
SEVERE: in send
INFO: WEB0169: Created HTTP listener [http-listener-1] on host/port [0.0.0.0:8080]
INFO: Grizzly Framework 1.9.50 started in: 2ms - bound to [0.0.0.0:8080]
INFO: [2] timers deleted for id: 90756774797901824
INFO: EJB5181:Portable JNDI names for EJB PriceVolumeBean: [java:global/org.glassfish.javaeetutorial_dukeetf2_war_7.0.4-SNAPSHOT/PriceVolumeBean, java:global/org.glassfish.javaeetutorial_dukeetf2_war_7.0.4-SNAPSHOT/PriceVolumeBean!javaeetutorial.web.dukeetf2.PriceVolumeBean]
SEVERE: in init
INFO: Initializing EJB.
INFO: WEB0671: Loading application [org.glassfish.javaeetutorial_dukeetf2_war_7.0.4-SNAPSHOT] at [/dukeetf2]
INFO: org.glassfish.javaeetutorial_dukeetf2_war_7.0.4-SNAPSHOT was successfully deployed in 348 milliseconds.
INFO: WEB0169: Created HTTP listener [http-listener-2] on host/port [0.0.0.0:8181]
INFO: Grizzly Framework 1.9.50 started in: 3ms - bound to [0.0.0.0:8181]
SEVERE: in timeout
SEVERE: in send
SEVERE: in timeout
SEVERE: in send
SEVERE: in timeout
SEVERE: in send
SEVERE: in timeout
SEVERE: in send
SEVERE: in timeout
SEVERE: in send
SEVERE: in timeout
.....

I have downloaded the dependencies and currently have, javaee-api-7.0.jar, activation-1.1.jar and javax.mail-1.5.0.jar in my dependencies directory. 我已经下载了依赖项，目前在我的依赖项目录中有javaee-api-7.0.jar，activation-1.1.jar和javax.mail-1.5.0.jar。

pom.xml 的pom.xml 

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <artifactId>websocket</artifactId>
        <groupId>org.glassfish.javaeetutorial</groupId>
        <version>7.0.4-SNAPSHOT</version>
    </parent>

    <groupId>org.glassfish.javaeetutorial</groupId>
    <artifactId>dukeetf2</artifactId>
    <packaging>war</packaging>

    <name>dukeetf2</name>
</project>

index.html index.html 

<!DOCTYPE html>
<html>
<head>
  <title>Duke's WebSocket ETF</title>
  <link rel="stylesheet" type="text/css" href="resources/css/default.css" />
  <script type="text/javascript">
      var wsocket;
      function connect() {
          wsocket = new WebSocket("ws://localhost:8080/dukeetf2/dukeetf");
          wsocket.onmessage = onMessage;
      }
      function onMessage(evt) {
          var arraypv = evt.data.split(",");
          document.getElementById("price").innerHTML = arraypv[0];
          document.getElementById("volume").innerHTML = arraypv[1];
      }
      window.addEventListener("load", connect, false);
  </script>
</head>
<body>
    <h1>Duke's WebSocket ETF</h1>
    <table>
        <tr>
            <td width="100">Ticker</td>
            <td align="center">Price</td>
            <td id="price" style="font-size:24pt;font-weight:bold;">--.--</td>
        </tr>
        <tr>
            <td style="font-size:18pt;font-weight:bold;" width="100">DKEJ</td>
            <td align="center">Volume</td>
            <td id="volume" align="right">--</td>
        </tr>
    </table>
</body>
</html>

ETFEndpoint.java ETFEndpoint.java 

package javaeetutorial.web.dukeetf2;

import java.io.IOException;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;

/* WebSocket version of the dukeetf example */
@ServerEndpoint("/dukeetf")
public class ETFEndpoint {
    private static final Logger logger = Logger.getLogger("ETFEndpoint");
    /* Queue for all open WebSocket sessions */
    static Queue<Session> queue = new ConcurrentLinkedQueue<>();

    /* PriceVolumeBean calls this method to send updates */
    public static void send(double price, int volume) {
        System.err.println("in send");

        String msg = String.format("%.2f, %d", price, volume);
        try {
            /* Send updates to all open WebSocket sessions */
            for (Session session : queue) {
                session.getBasicRemote().sendText(msg);
                logger.log(Level.INFO, "Sent: {0}", msg);
            }
        } catch (IOException e) {
            logger.log(Level.INFO, e.toString());
        }
    }

    @OnOpen
    public void openConnection(Session session) {
        System.err.println("in open connection");

        /* Register this connection in the queue */
        queue.add(session);
        logger.log(Level.INFO, "Connection opened.");
    }

    @OnClose
    public void closedConnection(Session session) {
        System.err.println("in closed connection");

        /* Remove this connection from the queue */
        queue.remove(session);
        logger.log(Level.INFO, "Connection closed.");
    }

    @OnError
    public void error(Session session, Throwable t) {
        System.err.println("in error");

        /* Remove this connection from the queue */
        queue.remove(session);
        logger.log(Level.INFO, t.toString());
        logger.log(Level.INFO, "Connection error.");
    }

}

PriceVolumeBean.java PriceVolumeBean.java 

    package javaeetutorial.web.dukeetf2;

import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.ejb.Timeout;
import javax.ejb.TimerConfig;
import javax.ejb.TimerService;

/* Updates price and volume information every second */
@Startup
@Singleton
public class PriceVolumeBean {
    /* Use the container's timer service */
    @Resource TimerService tservice;
    private Random random;
    private volatile double price = 100.0;
    private volatile int volume = 300000;
    private static final Logger logger = Logger.getLogger("PriceVolumeBean");

    @PostConstruct
    public void init() {
        /* Intialize the EJB and create a timer */
        System.err.println("in init");

        logger.log(Level.INFO, "Initializing EJB.");
        random = new Random();
        tservice.createIntervalTimer(1000, 1000, new TimerConfig());
    }

    @Timeout
    public void timeout() {
        System.err.println("in timeout");

        /* Adjust price and volume and send updates */
        price += 1.0*(random.nextInt(100)-50)/100.0;
        volume += random.nextInt(5000) - 2500;
        ETFEndpoint.send(price, volume);
    }
}

For those who wants to know how I've downloaded it, I used this address and "svn export" command. 对于那些想知道我如何下载它的人，我使用了该地址和“ svn export”命令。

1 个解决方案

解决方案1
 1 已采纳  2013-11-19 06:17:43

As you mentioned, you used Glassfish Server 3.1 that is not compatible with Java EE 7 . 如前所述，您使用了与Java EE 7不兼容的Glassfish Server 3.1 。 You should use Glassfish 4.0 server to run above WebSocket example. 您应该使用Glassfish 4.0服务器来运行上面的WebSocket示例。 WebSocket has introduced with Java EE 7. WebSocket已随Java EE 7一起引入。

To know how to run this example. 要知道如何运行此示例。 Go to this tutorial . 转到本教程 。

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