0

cometD と Longpolling で tomcat を動作させるのに問題があります。

ポーリングは少なくとも 1 秒間留まる必要がありますが、すべてのリクエストが ms 領域にあることが firebug でわかります。サーバーはミリ秒で応答しません。

これが私がfirebugで得たものです：

8ms 
  dojo.j...ssed.js (Zeile 11610)
  POST http://localhost:8080/chatty/cometd/connect

  200 OK
                4ms 
            dojo.j...ssed.js (Zeile 11610)
        POST http://localhost:8080/chatty/cometd/connect

     200 OK
    2ms 
  dojo.j...ssed.js (Zeile 11610)
    POST http://localhost:8080/chatty/cometd/connect

私の web.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
     version="3.0">

<servlet>
    <servlet-name>cometd</servlet-name>
    <servlet-class>org.cometd.server.CometdServlet</servlet-class>
    <init-param>
        <param-name>transports</param-name>
        <param-value>org.cometd.websocket.server.JSONTransport</param-value>
    </init-param>
    <init-param>
        <param-name>allowedTransports</param-name>
        <param-value>org.cometd.server.transport.LongPollingTransport</param-value>
    </init-param>
    <init-param>
        <param-name>services</param-name>
        <param-value>com.xxxxx.StockPriceService</param-value>
    </init-param>
    <init-param>
        <param-name>timeout</param-name>
        <param-value>60000</param-value>
    </init-param>
    <init-param>
        <param-name>logLevel</param-name>
        <param-value>3</param-value>
    </init-param>
    <init-param>
        <param-name>interval</param-name>
        <param-value>0</param-value>
    </init-param>
    <init-param>
        <param-name>long-polling.multiSessionInterval</param-name>
        <param-value>2000</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <async-supported>true</async-supported>
</servlet>
<servlet-mapping>
    <servlet-name>cometd</servlet-name>
    <url-pattern>/cometd/*</url-pattern>
</servlet-mapping>

<servlet>
    <servlet-name>initializer</servlet-name>
    <servlet-class>com.xxxxx.Initializer</servlet-class>
    <load-on-startup>2</load-on-startup>
</servlet>

<filter>
    <filter-name>cross-origin</filter-name>
    <filter-class>org.eclipse.jetty.servlets.CrossOriginFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>cross-origin</filter-name>
    <url-pattern>/cometd/*</url-pattern>
</filter-mapping>

<filter>
    <filter-name>continuation</filter-name>
    <filter-class>org.eclipse.jetty.continuation.ContinuationFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>continuation</filter-name>
    <url-pattern>/cometd/*</url-pattern>
</filter-mapping>

私のpom：maven-war-plugin org.cometd.javascript cometd-javascript-dojo org.mortbay.jetty jetty-maven-plugin 10 /をインストールします 

<dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.cometd.java</groupId>
        <artifactId>bayeux-api</artifactId>
        <version>${cometd-version}</version>
    </dependency>
    <dependency>
        <groupId>org.cometd.javascript</groupId>
        <artifactId>cometd-javascript-dojo</artifactId>
        <version>${cometd-version}</version>
        <type>war</type>
    </dependency>
    <dependency>
        <groupId>org.cometd.java</groupId>
        <artifactId>cometd-java-server</artifactId>
        <version>${cometd-version}</version>
    </dependency>
    <dependency>
        <groupId>org.cometd.java</groupId>
        <artifactId>cometd-java-annotations</artifactId>
        <version>${cometd-version}</version>
    </dependency>
    <dependency>
        <groupId>org.cometd.java</groupId>
        <artifactId>cometd-java-client</artifactId>
        <version>${cometd-version}</version>
    </dependency>
    <dependency>
        <groupId>org.cometd.java</groupId>
        <artifactId>cometd-websocket-jetty</artifactId>
        <version>${cometd-version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.cometd.java</groupId>
                <artifactId>cometd-java-client</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-util</artifactId>
        <version>${jetty-version}</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-jmx</artifactId>
        <version>${jetty-version}</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-continuation</artifactId>
        <version>${jetty-version}</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-websocket</artifactId>
        <version>${jetty-version}</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-servlets</artifactId>
        <version>${jetty-version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-client</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${slf4j-version}</version>
    </dependency>
</dependencies>

longpoll 構成に何か欠けていますか?

4

3 に答える 3

2

Your web.xml is really wrong.

First of all, you don't need to specify the transports <init-param> if you just want to use the long-polling transport. This parameter is for additional transports like websocket. This is explained here.

Parameter allowedTransports specifies transport names, not full qualified class names. This is explained here.

The services parameter is only read by AnnotationCometdServlet, as explained here (see section 6.4.2.3.4).

Look at the primer to setup your initial web application, and follow the tutorials.

于 2013-05-29T13:04:02.810 に答える
0

あなたがあなたの問題を解決したかどうかはわかりません。Faye Browser client (JS) を使用しても同じ問題が発生しました。私の場合、プロジェクトに新しい Transport クラスを追加し、それを web.xml に含めたときに機能し始めました。

下記参照：

package org.foo.bar.http.transports;

import java.util.Enumeration;

import java.io.IOException;
import java.text.ParseException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.cometd.bayeux.server.ServerMessage;
import org.cometd.server.BayeuxServerImpl;
import org.cometd.server.ServerSessionImpl;
import org.cometd.server.transport.LongPollingTransport;


public class CrossOriginLongPollingTransport extends LongPollingTransport
{
    public final static String PREFIX = "long-polling-cross-origin.json";
    public final static String NAME = "cross-origin-long-polling";
    public final static String MIME_TYPE_OPTION = "mimeType";

    private boolean _jsonDebug = false;
    private String _mimeType = "application/json;charset=UTF-8";

    public CrossOriginLongPollingTransport(BayeuxServerImpl bayeux)
    {
        super(bayeux, NAME);
        setOptionPrefix(PREFIX);
    }

    @Override
    protected boolean isAlwaysFlushingAfterHandle()
    {
        return false;
    }

    @Override
    protected void init()
    {
        super.init();
        _jsonDebug = getOption(JSON_DEBUG_OPTION, _jsonDebug);
        _mimeType = getOption(MIME_TYPE_OPTION, _mimeType);
    }

    @Override
    public boolean accept(HttpServletRequest request)
    {
        return "POST".equals(request.getMethod());
    }

    @Override
    protected ServerMessage.Mutable[] parseMessages(HttpServletRequest request) throws IOException, ParseException
    {
        String charset = request.getCharacterEncoding();
        if (charset == null)
            request.setCharacterEncoding("UTF-8");
        String contentType = request.getContentType();
        if (contentType == null || contentType.startsWith("application/json"))
            return parseMessages(request.getReader(), _jsonDebug);
        else if (contentType.startsWith("application/x-www-form-urlencoded")) {
            return parseMessages(request.getParameterValues(MESSAGE_PARAM));
        } else
            throw new IOException("Invalid Content-Type " + contentType);
    }

    @Override
    protected ServletOutputStream beginWrite(HttpServletRequest request, HttpServletResponse response, ServerSessionImpl session) throws IOException
    {
        response.setContentType(_mimeType);
        ServletOutputStream output = response.getOutputStream();
        output.write('[');
        return output;
    }

    @Override
    protected void endWrite(ServletOutputStream output, ServerSessionImpl session) throws IOException
    {
        output.write(']');
        output.close();
    }
}

その後、web.xml に以下を含めます。

    <init-param>
        <param-name>transports</param-name>
        <param-value>org.cometd.websocket.server.WebSocketTransport,org.foo.bar.http.transports.CrossOriginLongPollingTransport</param-value>
    </init-param>
    <init-param>
        <param-name>allowedTransports</param-name>
        <param-value>cross-origin-long-polling,long-polling,callback-polling,websocket</param-value>
    </init-param>

それは私にとってはうまくいきました。あなたも助けてくれることを願っています。

一番。

于 2014-07-17T19:03:59.660 に答える
0

web.xml のフィルターは true としてマークする必要があります。たとえば、org.eclipse.jetty.continuation.ContinuationFilter

于 2013-05-29T14:06:48.520 に答える