断开Grails中的大气插座

时间:2012-03-12 14:25:17

标签: ajax grails websocket comet atmosphere

我正在编写一个使用Atmosphere插件的Grails应用程序。连接有效,但每次我在浏览器中更新页面时,我都会看到我的Web服务器添加了一个新的守护程序线程,后来永远不会释放。

线程数达到200后,Web服务器冻结。

似乎没有文档说明使用Atmosphere插件处理资源(断开连接)的正确方法是什么?

我的客户端代码执行此操作:

var connectedEndpoint = null;

$(function() 
{
function callback(response)
{
    if (response.transport != 'polling' && response.state != 'connected' && response.state != 'closed') {
        if (response.status == 200) {
            eval(response.responseBody);
        }
    }
}

$.atmosphere.subscribe('${resource(dir: '/atmosphere/channel')}', callback, $.atmosphere.request = {transport: 'streaming'});
connectedEndpoint = $.atmosphere.response;

});

$(window).unload( function () 
{ 
    $.atmosphere.unsubscribe();
    connectedEndpoint = null;
});

我在服务器端使用气氛处理程序;

package demo

import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse
import org.atmosphere.cpr.AtmosphereHandler
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereResourceEvent;

class DemoController implements AtmosphereHandler<HttpServletRequest, HttpServletResponse> {

@Override
public void destroy() {
    println "destroy"
}

@Override
public void onRequest( AtmosphereResource<HttpServletRequest, HttpServletResponse> event) throws IOException 
{
    event.suspend()
}

@Override
public void onStateChange( AtmosphereResourceEvent<HttpServletRequest, HttpServletResponse> event) throws IOException 
{
    if (event.isSuspended()) 
    {
        event.resource.response.writer.with {
            def message = event.message
            write "set${message.paramName}(\"${message.id}\",\"${message.value}\");"
            flush()
        }
    }
}
}

永远不会调用处理程序的destroy函数!

下图显示我有23个线程正在运行。当我开始我的应用程序时,大约有6个,每次按F5时都会添加它们!如果我禁用大气,则不添加新线程,因此此问题与大气相关。 (我在Windows7上使用SpringSource Tools Suite。)

Daemon threads

如果解决方案不是微不足道的话,我将非常感谢详细的分步说明或示例。

更新:在Tomcat中部署后,我每20秒就会出现以下错误:

Apr 02, 2012 2:35:15 PM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor host-manager.xml
Apr 02, 2012 2:35:16 PM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor manager.xml
Apr 02, 2012 2:35:16 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory docs
Apr 02, 2012 2:35:16 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory examples
Apr 02, 2012 2:35:17 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory ROOT
Apr 02, 2012 2:35:17 PM org.apache.coyote.http11.Http11AprProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Apr 02, 2012 2:35:17 PM org.apache.coyote.ajp.AjpAprProtocol start
INFO: Starting Coyote AJP/1.3 on ajp-8009
Apr 02, 2012 2:35:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 11401 ms
2012-04-02 14:41:17,122 [http-8080-39] ERROR cpr.AsynchronousProcessor  - failed
 to timeout resource AtmosphereResourceImpl{, hasCode-1035775543,
 action=org.atmosphere.cpr.AtmosphereServlet$Action@f2718e,
 broadcaster=org.atmosphere.cpr.DefaultBroadcaster,
 cometSupport=org.atmosphere.container.TomcatCometSupport@107fff7,
 serializer=null,
 isInScope=true,
 useWriter=true,
 listeners=[]}
2012-04-02 14:42:15,034 [http-8080-69] ERROR cpr.AsynchronousProcessor  - failed
 to timeout resource AtmosphereResourceImpl{, hasCode-58082012,
 action=org.atmosphere.cpr.AtmosphereServlet$Action@ae4dd4,
 broadcaster=org.atmosphere.cpr.DefaultBroadcaster,
 cometSupport=org.atmosphere.container.TomcatCometSupport@107fff7,
 serializer=null,
 isInScope=true,
 useWriter=true,
 listeners=[]}
2012-04-02 14:44:41,159 [http-8080-13] ERROR cpr.AsynchronousProcessor  - failed
 to timeout resource AtmosphereResourceImpl{, hasCode648226529,
 action=org.atmosphere.cpr.AtmosphereServlet$Action@507e61,
 broadcaster=org.atmosphere.cpr.DefaultBroadcaster,
 cometSupport=org.atmosphere.container.TomcatCometSupport@107fff7,
 serializer=null,
 isInScope=true,
 useWriter=true,
 listeners=[]}

 ....

2 个答案:

答案 0 :(得分:1)

萨吕,

您使用的是哪个WebServer?当浏览器关闭连接时,WebServer没有检测到声音。您可以在web.xml中添加以下超时检测器

org.atmosphere.cpr.CometSupport.maxInactiveActivity = 30000 // 30秒

让我知道它是怎么回事。

A +

- Jeanfrancois

答案 1 :(得分:0)

我相信您的问题出在卸货事件中。 “$(窗口).unload”。我知道至少在chrome中,你在卸载或者之前的事件中做不了多少。因此,您的浏览器可能永远不会触发取消订阅()。

如果你看一下Atmospheres jquery pubsub样本,你可以在连接之前看到取消订阅, function connect(){     退订();     ...

您可以编写一个循环来检查广播公司,通过推送无关紧要的数据来定期验证广播公司是否没有得到清理。我需要更多地研究气氛并希望有更好的解决方案。希望您可以在刷新时创建新连接时清理线程,并在用户离开时让旧连接到期。