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Reverse Ajax not wrking plz help

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Reverse Ajax not wrking plz help

by aakar :: Rate this Message:

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java file

package mani;
import java.util.Collection;


import javax.servlet.ServletContext;

import org.directwebremoting.ServerContext;
import org.directwebremoting.ServerContextFactory;
import org.directwebremoting.WebContextFactory;
import org.directwebremoting.proxy.dwr.Util;


public class Mani
{
private ServerContext sctx=null;

public Mani()
{
        ServletContext servletContext = WebContextFactory.get().getServletContext();
    sctx = ServerContextFactory.get(servletContext);

}
        public synchronized void getit() throws InterruptedException
        {
        Collection sessions = sctx.getScriptSessionsByPage("/Aakar/index.html");
        Util pages = new Util(sessions);
        System.out.println("Hello");
        pages.setValue("one","Calling");
        Thread.sleep(5000);
        pages.setValue("one","Established");
       
        }
       
       
}



web.xml file

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="Aakar" version="2.5">
 
 
  <servlet>
  <servlet-name>dwr-invoker</servlet-name>
  <!-- <display-name>DWR Servlet</display-name> -->
  <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
  <init-param>
    <param-name>debug</param-name>
    <param-value>true</param-value>
  </init-param>
  <init-param>
      <param-name>activeReverseAjaxEnabled</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>initApplicationScopeCreatorsAtStartup</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>maxWaitAfterWrite</param-name>
      <param-value>500</param-value>
    </init-param>
        <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  <servlet-name>dwr-invoker</servlet-name>
  <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
</web-app>



dwr.xml


<!DOCTYPE dwr PUBLIC
    "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
    "http://getahead.org/dwr/dwr20.dtd">

<dwr>
  <allow>
    <create creator="new" javascript="Mani" scope="application" >
     
    </create>
  </allow>
</dwr>


index.html file

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Aakar</title>
<script type='text/javascript' src='../dwr/interface/Mani.js'></script>
<script type='text/javascript' src='../dwr/engine.js'></script>
<script type='text/javascript' src='../dwr/util.js'></script>
<script type="text/javascript">
</script>
</head>
<body onload="dwr.engine.setActiveReverseAjax(true);">
<br/>
<div id="one">
</div>
<br/>
<input type="button" value="Yo Man" onclick="Mani.getit();" />
<script type="text/javascript">
</script>
</body>
</html>


the above code is not wrking out ....plz help me .........
Thanx in advance

Re: Re[dwr-user] verse Ajax not wrking plz help

by Lance Java :: Rate this Message:

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WebContextFactory.get() only works for threads that are initiated by a DWR request. I'm not sure of the scope of Mani but I'm guessing that the constructor is not invoked by a DWR request. If you move the WebContextFactory.get() call inside getit() it will hopefully work.

Cheers,
Lance.

2009/6/12 aakar <aakar.gupta@...>

java file

package mani;
import java.util.Collection;


import javax.servlet.ServletContext;

import org.directwebremoting.ServerContext;
import org.directwebremoting.ServerContextFactory;
import org.directwebremoting.WebContextFactory;
import org.directwebremoting.proxy.dwr.Util;


public class Mani
{
private ServerContext sctx=null;

public Mani()
{
       ServletContext servletContext =
WebContextFactory.get().getServletContext();
   sctx = ServerContextFactory.get(servletContext);

}
       public synchronized void getit() throws InterruptedException
       {
       Collection sessions = sctx.getScriptSessionsByPage("/Aakar/index.html");
       Util pages = new Util(sessions);
       System.out.println("Hello");
       pages.setValue("one","Calling");
       Thread.sleep(5000);
       pages.setValue("one","Established");

       }


}



web.xml file

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="Aakar" version="2.5">


 <servlet>
 <servlet-name>dwr-invoker</servlet-name>
 <!-- <display-name>DWR Servlet</display-name> -->
 <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
 <init-param>
   <param-name>debug</param-name>
   <param-value>true</param-value>
 </init-param>
 <init-param>
     <param-name>activeReverseAjaxEnabled</param-name>
     <param-value>true</param-value>
   </init-param>
   <init-param>
     <param-name>initApplicationScopeCreatorsAtStartup</param-name>
     <param-value>true</param-value>
   </init-param>
   <init-param>
     <param-name>maxWaitAfterWrite</param-name>
     <param-value>500</param-value>
   </init-param>
       <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>dwr-invoker</servlet-name>
 <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
</web-app>



dwr.xml


<!DOCTYPE dwr PUBLIC
   "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
   "http://getahead.org/dwr/dwr20.dtd">

<dwr>
 <allow>
   <create creator="new" javascript="Mani" scope="application" >

   </create>
 </allow>
</dwr>


index.html file

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Aakar</title>
<script type='text/javascript' src='../dwr/interface/Mani.js'></script>
<script type='text/javascript' src='../dwr/engine.js'></script>
<script type='text/javascript' src='../dwr/util.js'></script>
<script type="text/javascript">
</script>
</head>
<body onload="dwr.engine.setActiveReverseAjax(true);">
<br/>
<div id="one">
</div>
<br/>
<input type="button" value="Yo Man" onclick="Mani.getit();" />
<script type="text/javascript">
</script>
</body>
</html>


the above code is not wrking out ....plz help me .........
Thanx in advance
--
View this message in context: http://www.nabble.com/Reverse-Ajax-not-wrking-plz-help-tp23996376p23996376.html
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Re: Re[dwr-user] verse Ajax not wrking plz help

by Lance Java :: Rate this Message:

Reply to Author | View Threaded | Show Only this Message

I tend to use the alternatative method listed here to access servlet objects

It makes the code easier to test and easier to integrate with code not invoked by DWR threads.

2009/6/12 Lance Java <lance.java@...>
WebContextFactory.get() only works for threads that are initiated by a DWR request. I'm not sure of the scope of Mani but I'm guessing that the constructor is not invoked by a DWR request. If you move the WebContextFactory.get() call inside getit() it will hopefully work.

Cheers,
Lance.

2009/6/12 aakar <aakar.gupta@...>


java file

package mani;
import java.util.Collection;


import javax.servlet.ServletContext;

import org.directwebremoting.ServerContext;
import org.directwebremoting.ServerContextFactory;
import org.directwebremoting.WebContextFactory;
import org.directwebremoting.proxy.dwr.Util;


public class Mani
{
private ServerContext sctx=null;

public Mani()
{
       ServletContext servletContext =
WebContextFactory.get().getServletContext();
   sctx = ServerContextFactory.get(servletContext);

}
       public synchronized void getit() throws InterruptedException
       {
       Collection sessions = sctx.getScriptSessionsByPage("/Aakar/index.html");
       Util pages = new Util(sessions);
       System.out.println("Hello");
       pages.setValue("one","Calling");
       Thread.sleep(5000);
       pages.setValue("one","Established");

       }


}



web.xml file

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="Aakar" version="2.5">


 <servlet>
 <servlet-name>dwr-invoker</servlet-name>
 <!-- <display-name>DWR Servlet</display-name> -->
 <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
 <init-param>
   <param-name>debug</param-name>
   <param-value>true</param-value>
 </init-param>
 <init-param>
     <param-name>activeReverseAjaxEnabled</param-name>
     <param-value>true</param-value>
   </init-param>
   <init-param>
     <param-name>initApplicationScopeCreatorsAtStartup</param-name>
     <param-value>true</param-value>
   </init-param>
   <init-param>
     <param-name>maxWaitAfterWrite</param-name>
     <param-value>500</param-value>
   </init-param>
       <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>dwr-invoker</servlet-name>
 <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
</web-app>



dwr.xml


<!DOCTYPE dwr PUBLIC
   "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
   "http://getahead.org/dwr/dwr20.dtd">

<dwr>
 <allow>
   <create creator="new" javascript="Mani" scope="application" >

   </create>
 </allow>
</dwr>


index.html file

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Aakar</title>
<script type='text/javascript' src='../dwr/interface/Mani.js'></script>
<script type='text/javascript' src='../dwr/engine.js'></script>
<script type='text/javascript' src='../dwr/util.js'></script>
<script type="text/javascript">
</script>
</head>
<body onload="dwr.engine.setActiveReverseAjax(true);">
<br/>
<div id="one">
</div>
<br/>
<input type="button" value="Yo Man" onclick="Mani.getit();" />
<script type="text/javascript">
</script>
</body>
</html>


the above code is not wrking out ....plz help me .........
Thanx in advance
--
View this message in context: http://www.nabble.com/Reverse-Ajax-not-wrking-plz-help-tp23996376p23996376.html
Sent from the DWR - Users mailing list archive at Nabble.com.


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Re: Re[dwr-user] verse Ajax not wrking plz help

by aakar :: Rate this Message:

Reply to Author | View Threaded | Show Only this Message

@ Lance thnx for help
i tried but it didnt wrk out ...
can u suggest smthing else .....
i m confused abt javascript .....is it fine ??
thnx ....

Re: Re: Re[dwr-user] verse Ajax not wrking plz help

by Lance Java :: Rate this Message:

Reply to Author | View Threaded | Show Only this Message

The JS looks ok to me does your "hello" debug work?
If not, try running from the dwr debug page http://hobione.wordpress.com/2007/12/14/debug-dwr/

Try logging the size of the scriptSession collection in getit() is it 0?

Have you installed the Firebug plugin in Firefox? It's an invaluable tool for debugging javascript and the "net" tab is handy for seeing ajax requests / responses.


2009/6/12 aakar <aakar.gupta@...>

@ Lance thnx for help
i tried but it didnt wrk out ...
can u suggest smthing else .....
i m confused abt javascript .....is it fine ??
thnx ....
--
View this message in context: http://www.nabble.com/Reverse-Ajax-not-wrking-plz-help-tp23996376p23997057.html
Sent from the DWR - Users mailing list archive at Nabble.com.


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