Seam.Component.getInstance raise Seam is not defined

[shanghanyu]

Hi,
   Im doing remoting for js and trying to get the example from the doc to work. Have configured servlet in the web.xml, put
<script type="text/javascript" src="seam/resource/remoting/resource/remote.js"></script>
<s:remote include="helloAction"/>
<script type="text/javascript">
  //<![CDATA[
  function sayHello() {
    var name = prompt("What is your name?");
    Seam.Component.getInstance("helloAction").sayHello(name, sayHelloCallback);
  }
  function sayHelloCallback(result) {
    alert(result);
  }
   // ]]>
</script>
in the body of a xhtml
and created the class and the interface as told in the doc
but Im getting no response but this using firebug when entering the name in the prompt box and hit OK:

Seam.Component.getInstance("helloAction").sayHello is not a function
[Break On This Error] Seam.Component.getInstance("helloAction").sayHello(name, sayHelloCallback);

Can anybody give a hint on this, thx.

[tausuahmed]

Make sure that jboss-seam-remoting.jar in proper place, If your application in ear based it should be in ear/lib else in web-inf/lib.

Thanks,
Tauseef

[shanghanyu]

Thx, Tauseef.

But I already have it in the ear/lib and web-inf/lib, not working. Also I tried to put it only in the ear/lib. No luck as well.

[lvdberg]

Hi,

Sometimes the caching gets in the way. When you do different deploys, the JS content doesn't change, try if clearing your cache helps. If not send some addtional code from the bean.

Leo

[sherkan777]

If you are working on localhost try to add prefix to your web script mapping

for an example:

<script type="text/javascript" src="/myProj/game/resource/remoting/resource/remote.js" />
<script type="text/javascript" src="/MyProj/game/resource/remoting/interface.js?playersHistoryAction" />

if you are working on production server, remove

/myProj/

,

Second question, do you have any stacktrace server error msg?
Try to debug page on FF and show us your javascript console error.

[sherkan777]

And one more think...show your java class method.

[shanghanyu]

hey, Sherkan

    I am working on localhost, and it's a seam-gen project by the way. I tried to add the prefix as you mentioned, still no luck.

    There is no stacktrace or error msg. Just the firebug gave me this:

Seam.Component.getInstance("helloAction").sayHello is not a function
[Break On This Error] Seam.Component.getInstance("helloAction").sayHello(name, sayHelloCallback);


The java class is just from the seam doc, I didn't change anything, one is

import org.jboss.seam.annotations.Name;

@Name("helloAction")
public class HelloAction {

   public String sayHello(String name) {
      return "Hello, " + name;
   }
}


the other is

import javax.ejb.Local;
import org.jboss.seam.annotations.remoting.WebRemote;
@Local
public interface HelloLocal {

  @WebRemote
  public String sayHello(String name);

}

[shanghanyu]

Hey, Sherkan

I modified the path again, now Im getting this error, but still no stacktrace.

Seam.Component.getInstance("helloAction").sayHello is not a function
[Break On This Error] Seam.Component.getInstance("helloAction").sayHello(name, sayHelloCallback);

I think probably it is the path that is causing problems here, any idea how I can fix this step?
thx

[lvdberg]

Hi,

You forgot to implement the interface on your class. So your Bean should be:

public class HelloAction implements HelloLocal

Leo

[shanghanyu]

Thx, thats one silly mistake , I forgot that, but added it in I still get the same problem.

Seam.Component.getInstance("helloAction").sayHello is not a function
[Break On This Error] Seam.Component.getInstance("helloAction").sayHello(name, sayHelloCallback);

[lvdberg]

Hi,

have you looked at the configuration in web.xml. Is maybe the resouce definition missing ?

Leo

[shanghanyu]

Thx Leo.


This is what I put in the web.xml.


<servlet>
      <servlet-name>Seam Resource Servlet</servlet-name>
      <servlet-class>org.jboss.seam.servlet.SeamResourceServlet</servlet-class>
   </servlet>

   <servlet-mapping>
      <servlet-name>Seam Resource Servlet</servlet-name>
      <url-pattern>/seam/resource/*</url-pattern>
   </servlet-mapping>

[lvdberg]

Hi,

if everything is configured as stated, there shouldn't be a reasong that it doesn't work,

So maybe there are other things to consider.

Try to download the scripts manually. Use your browser an type the full url of the resource for the js file. If you can't dowload it, you're probably in a subdirector, so you need to prefix the url of the link. You can do this with:

src="#{request.contextPath}/seam/resource/remoting/resource/remote.js"

If this is the case you should do the same with the bean-script, so instead of using the s-tag.
You need to use the full definition as described in the doc.

<script type="text/javascript"
src="#{request.contextPath}/seam/resource/remoting/interface.js?helloAction"></script>

Leo

[shanghanyu]

I tried to download the js file and it can be downloaded......

[lvdberg]

Hi,

change the s-tag to the normal script line and try it again. If it still refuses, try to clean your browser cache. As stated before that can be the cause, because it happened to me when I changed a componet a number of times.

Leo