MessageBrokerServlet 初始化问题 - 将数据从 java 推送到 Flex 应用程序

Question

大家好，

我正在研究从 Java 到 Flex 的服务器推送。但是 MessageBrokerServlet 没有被初始化的一些原因，似乎是从以下位置调用一个方法：

flex.messaging.config.LoginCommandSettings.setMatch()

最终我发现该方法确实不存在于该类中（LoginCommandSettings）。我还有其他问题吗？

这就是 tomcat 日志的内容：

2012-01-24 14:04:57 StandardContext[/mywebapp]StandardWrapper.Throwable
java.lang.NoSuchMethodError: flex.messaging.config.LoginCommandSettings.setMatch(Ljava/lang/String;)V
at flex.messaging.config.ServerConfigurationParser.securitySection(ServerConfigurationParser.java:172)
at flex.messaging.config.ServerConfigurationParser.parseTopLevelConfig(ServerConfigurationParser.java:53)
at flex.messaging.config.AbstractConfigurationParser.parse(AbstractConfigurationParser.java:68)
at flex.messaging.config.FlexConfigurationManager.getMessagingConfiguration(FlexConfigurationManager.java:77)
at flex.messaging.MessageBrokerServlet.init(MessageBrokerServlet.java:101)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:619)

2012-01-24 14:04:57 StandardWrapperValve[MessageBrokerServlet]: Allocate exception for servlet MessageBrokerServlet
javax.servlet.ServletException: Servlet.init() for servlet MessageBrokerServlet threw exception
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1071)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:619)
—– Root Cause —–
java.lang.NoSuchMethodError: flex.messaging.config.LoginCommandSettings.setMatch(Ljava/lang/String;)V
at flex.messaging.config.ServerConfigurationParser.securitySection(ServerConfigurationParser.java:172)
at flex.messaging.config.ServerConfigurationParser.parseTopLevelConfig(ServerConfigurationParser.java:53)
at flex.messaging.config.AbstractConfigurationParser.parse(AbstractConfigurationParser.java:68)
at flex.messaging.config.FlexConfigurationManager.getMessagingConfiguration(FlexConfigurationManager.java:77)
at flex.messaging.MessageBrokerServlet.init(MessageBrokerServlet.java:101)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:619)

我是 Flex 编程新手，并且使用 tomcat server- jakarta-tomcat-5.0.28 来部署 Web 应用程序。我已经对 messaging-config.xml、services-config.xml 进行了所有更改，并编写了一个带有线程的 Java 类来不断推送数据。

我在我的java代码中使用了2个库：

1. blazeds-common-3.0

2. flex-messaging

自从过去两天以来我一直坚持这个。 .. 因此，在这方面的任何帮助将不胜感激......

提前致谢！

-Adwait

这是我的 messages-config.xml：

<?xml version="1.0" encoding="UTF-8"?>
<service id="message-service" 
    class="flex.messaging.services.MessageService">

    <adapters>
        <adapter-definition id="actionscript" class="flex.messaging.services.messaging.adapters.ActionScriptAdapter" default="true" />
        <adapter-definition id="jms" class="flex.messaging.services.messaging.adapters.JMSAdapter"/>
        <adapter-definition id="feed" class="packagename.className"/>
    </adapters>
    <destination id="feed">
        <properties>
            <network>
                <session-timeout>0</session-timeout>
            </network>
            <server>
                <max-cache-size>1000</max-cache-size>
                <message-time-to-live>0</message-time-to-live>
                <durable>false</durable>
            </server>
        </properties>
        <channels>
            <channel ref="my-rtmp"/>
        </channels>
    </destination>
</service>

这是我的 AS 文件：

import mx.messaging.Consumer;
import mx.messaging.events.MessageEvent;
import mx.messaging.events.MessageFaultEvent;
import mx.messaging.messages.IMessage;

private var listner: Consumer;

// functio to handle the creationComplete event:
public function ccHandler(): void {

    listner = new Consumer();
    listner.addEventListener(MessageEvent.MESSAGE, onReceiveMessageFromServer);
    listner.addEventListener(MessageFaultEvent.FAULT, onFailedReceiveMessageFromServer);
}

// receive message handler:
private function onReceiveMessageFromServer(message: IMessage): void {

    lblMessageReceivedFromServer.text = message.body.toString();
}

// fault message handler:
private function onFailedReceiveMessageFromServer(message: IMessage): void {

    lblMessageReceivedFromServer.text = "Error when receiving message from 'feed'";
}

定期发送数据的 Java 类（目标）：

import flex.messaging.MessageBroker;
import flex.messaging.messages.AsyncMessage;
import flex.messaging.messages.Message;
import flex.messaging.services.ServiceAdapter;
import flex.messaging.util.UUIDUtils;

/**
 *
 * @author adeshpande
 */
public class ServerPushManager extends ServiceAdapter {

    private volatile boolean running;

    public static void sendMessageToClients() {

        // random no. to send to client:
        double dNumber = 0;

        // set the message broker 
        final MessageBroker msgBroker = MessageBroker.getMessageBroker(null);

        // set the UUID:
        final String clientId = UUIDUtils.createUUID(false);

        // create the message to send and set parameters
        final AsyncMessage msg = new AsyncMessage();
        msg.setDestination("feed");
        msg.setClientId(clientId);
        msg.setMessageId((UUIDUtils.createUUID(false)));
        msg.setTimestamp(System.currentTimeMillis());
        dNumber = Math.random()*100;
        msg.setBody(dNumber);
        System.out.println("\n---- Message to send: " +dNumber +" ----\n");

        // send the message into the message routing system:
        msgBroker.routeMessageToService(msg, null);
    }

    /*
    private void sendMessageToClients(Message msg) {

        ((MessageService) getDestination().getService()).pushMessageToClients(msg, false);
    }
    */


    @Override                  // flex.messaging.services.ServiceAdapter ---> start()
    public void start(){

        super.start();
        Thread messageSender = new Thread(){

            @Override
            public void run(){

                running = true;
                while(running){

                    sendMessageToClients();
                    secondsToSleep(3);
                }
            }
        };
        messageSender.start();        
    }


    @Override                   // flex.messaging.services.ServiceAdapter ---> stop()
    public void stop(){

        super.stop();
        running = false;
    }



    @Override
    public Object invoke(Message message) {

        if (message.getBody().equals("stop")) {

            running = false;
        }
        return null;
    }

    private void secondsToSleep(int seconds) {

        try{

            Thread.sleep(seconds * 1000);
        }
        catch(InterruptedException e){

            System.out.println("TestServiceAdapter Interrupted while sending messages");
            e.printStackTrace();
        }
    }
}

Answer 1

AFAIK，RTMP 和 RTMPT 协议仅在 LiveCycle Data Services (LCDS) 中可用，在 BlazeDS 中不可用，这解释了这些错误。

Answer 2

听起来你的 blaze 设置有问题。找到问题可能会很困难。相反，尝试使用 BlazeDS 进行全新的工作。您可以尝试以下简单的 2 分钟设置：

• 在 tomcat 上安装 blazeDS
• 制作 webapps/blazeds 的副本，并将该副本重命名为您的应用程序名称
• 现在将您编码的所有 java 类添加到 webapps/my-application/WEB- INF/classes 文件夹
• 配置 WEB-INF/flex/remoting-config 和 services-config.xml 文件

这样您就可以确保所有依赖的库、类和配置文件都包含在您的应用程序中。