modify seam component from javascript

[steeve89]

Hy!

I'm beginner in seam, and I don't know how to send parameters to my seam component from javascript.

Here is the javascript code, I've got the lat and lng coordinates

<script type="text/javascript">
     function get(latlng){
          map.panTo(marker.getPoint());
          var la = latlng.lat();
          var ln = latlng.lng();
          alert("Lat: " + la + ", Lng: " + ln);
     }
</script>

and my entity bean:

@Entity
@Scope(ScopeType.SESSION)
@Name("site")
public class Site {
...
private double lat;
private double lng;

... //getters and setters
}

So I'd like to transfer la coordinate to site.lat and ln to site.lng.
Thanks in advance!

I'm sorry if I didn't write correctly.(I'm Hungarian, and I'm not too good in English)

[idyoshin]

read documentation on Remoting :)  there is a great info on doing this.

Best regards,
Ilya Dyoshin

[tmalatinszki]

Hi István,

You can find a cool tutorial about remoting here. First You need to set up remoting in components.xml, then You need to put @WebRemote annotation on setLat and setLng functions, and then:

<script type="text/javascript">
  function updateVariables() {

  //Your previous code

  Seam.Component.getInstance("site").setLat(la);
  Seam.Component.getInstance("site").setLng(ln);
}
</script>

Regards,

Tamás

[tmalatinszki]

Some details more: put these lines into components.xml:

<components xmlns:remoting="http://jboss.com/products/seam/remoting"
            xsi:schemaLocation="http://jboss.com/products/seam/remoting http://jboss.com/products/seam/remoting-2.1.xsd">

<remoting:remoting debug="true"/>

Then modify the bean this way:

import org.jboss.seam.annotations.remoting.WebRemote;

@Entity
@Scope(ScopeType.SESSION)
@Name("site")
public class Site {
...
private double lat;
private double lng;

  @WebRemote
  public void setLat(double lat){
    this.lat=lat;
  }

  @WebRemote
  public void setLng(double lng){
    this.lng=lng;
  }

}

And in the xhtml:

<s:remote include="site"/>

<script type="text/javascript">
   function get(latlng){
      map.panTo(marker.getPoint());
      var la = latlng.lat();
      var ln = latlng.lng();
      Seam.Component.getInstance("site").setLat(la);
      Seam.Component.getInstance("site").setLng(ln);
      alert("Lat: " + la + ", Lng: " + ln);
   }
</script>

Regards,

Tamas

[steeve89]

Hi Tamás!

I tried this way, before I opened this post. I saw this tutorial that is similar the seam reference tutorial. I tried to make the HelloWorld remoting example, but it didn't work. I've got a WARN message when I starting my JBoss server:
[JAXWSDeployerHookPreJSE] Cannot load servlet class: org.jboss.seam.remoting.SeamRemotingServlet

When I imported the jboss-seam-remoting.jar to my projekt, and I edited in Eclipse the web.xml, I've not find the SeamRemotingServlet class.

<servlet>
  <servlet-name>Seam Remoting</servlet-name>
  <servlet-class>org.jboss.seam.remoting.SeamRemotingServlet</servlet-class>
</servlet>

I tried to find a jboss-seam-remoting.jar with this class, but I've not find. Do you think this is the source of trouble?

[tmalatinszki]

Hmm...sounds weird, because my example is working fine in my test project without this servlet definition. My web.xml looks like this:

 ... 
  
  <listener>
    <listener-class>org.jboss.seam.servlet.SeamListener</listener-class>
  </listener>

  <filter>
    <filter-name>Seam Filter</filter-name>
    <filter-class>org.jboss.seam.servlet.SeamFilter</filter-class>
  </filter>

  <filter-mapping>
    <filter-name>Seam Filter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <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>

  ...

As far as I know Seam Resource Servlet should be enough for remoting, so You should try again with this configuration (see this topic, they had a similar issue with Seam Remoting).

Please let me know if it is working fine this way.

Regards,

Tamás

[steeve89]

Hi Tamás!

Unfortunately, this isn't works in my case. I'd like to talk with you in Hungarian. If you registered in facebook, I found 1 result of your name, but I don't sure whehter you're (you play guitar in this picture).

Please write here if you're.

[tmalatinszki]

You're right, that's me. :)

Just drop a message on me, but after we find the root cause of this issue don't forget to post that here.