2 Replies Latest reply on Nov 14, 2014 11:41 AM by keithdmoore94

Seam web remoting not working within a javascript funtion

enikozsido Aug 1, 2008 2:49 PM

Hi all,

Please take a look at following source!

The interface is:

@Local
public interface IMessageServices
{
     @WebRemote
     public String addMessage(String key);

}

then the implementation:

@Scope(ScopeType.SESSION)
@Name("messageService")
public class MessageService implements IMessageServices
{
     @WebRemote
     public String addMessage(String key)
     {
          FacesMessages.instance().addFromResourceBundle(FacesMessage.SEVERITY_ERROR, key);
          return "success";
     }
}

the xhtml :

...
     <script type="text/javascript" src="seam/resource/remoting/resource/remote.js"></script>
     <script type="text/javascript" src="seam/resource/remoting/interface.js?messageService"></script>
...
         <script type="text/javascript">
               //<![CDATA[
...
           Seam.Remoting.setDebug(true);            
             var str = "message"
             Seam.Component.getInstance("messageService").addMessage(str,success);
             
                function success(result){
               alert(result);
          }
               //]]>
     </script>

The debug info is:

Fri Aug 01 2008 15:27:52 GMT+0300: Request packet:
<envelope><header><context></context></header><body><call component="messageService" method="addMessage" id="0">
<params><param><str>message</str></param></params><refs></refs></call></body></envelope>


Fri Aug 01 2008 15:27:52 GMT+0300: Response packet:
<envelope><header><context><conversationId>27</conversationId></context></header><body><result id="0"><value><str>success</str></value><refs></refs></result></body></envelope>

This works as expected: alerts(succeess).

I'm trying to remotely invoke my method inside a javascript function:

 function addMessage(str){
             Seam.Component.getInstance("messageService").addMessage(str,success);
 }
....
<h:commandButton  value="Add" onclick="addMessage('message');"/>

This time I get an error alert There was an error processing your request. Error code: 0.
The Debug info is:

Fri Aug 01 2008 15:40:49 GMT+0300: Request packet:
<envelope><header><context></context></header><body><call component="messageService" method="addMessage" id="0">
<params><param><str>message</str></param></params><refs></refs></call></body></envelope>

As you can see there is no response.
Do you have any idea why this happens?

1. Re: Seam web remoting not working within a javascript funtion

teacurran Apr 17, 2009 12:31 PM (in response to enikozsido)

I know this is an old post but I was having this exact problem and I wanted to post for anyone else having this issue.

The problem is that <h:commandButton is causing a form submit to happen immediately after the ajax request is queued to happen.

If you change it to something like <a href="javascript:addMessage('message')">click</a> the problem goes away.
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2. Re: Seam web remoting not working within a javascript funtion

keithdmoore94 Nov 14, 2014 11:41 AM (in response to teacurran)

Just posting this in hopes of helping others. I had this problem and I needed to invoke a callback to issue a window.close().

Before:

function doSomething() {
     var action = getComponent("myAction"); // This function gets the component in the usual way...
     action.doSomeWork();
     window.close();
}

After:
function doSomething() {
     var action = getComponent("myAction"); // This function gets the component in the usual way...
     action.doSomeWork(function() {
       window.close();
     });
}
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