Java ZK pass parameter from iframe to ZUL different servers

I have a ZUL using the ZK framework. I have something like this

<window>
   <iframe width="100%" height="100%" src='http://anotherserver/zules/otherzul.zul?parameter=24'/>
</window>

The zul I want to show is on a different server which is using the same philosophy this means is using the ZK framework as well. in fact I can see the zul using my current code. but I need to pass a parameter a simple String as the show above.

How can I retrieve the parameter in the target ZUL otherzul.zul in the example?

You can do that 2 ways.

In the zul directly :

<label value="${arg.parameter}"/>

The better solution is to do it in the controller/viewmodel.
With this you have a fallback if the arg isn't provided.
You have to do it in the doAfterCompose

For MVC extending the SelectorComposer the arg is already defined.

private int parameter;

@Override
public void doAfterCompose(Component window) throws Exception {
    super.doAfterCompose(window);
    if (arg.containsKey("parameter")) {
        parameter =  (int) arg.get("parameter"));
    } else {
       //Declare what is is when you don't have the arg
    }    
}

For MVVM :

String queryParam;

@Init
public void init(@QueryParam("parameter") int parm1){
    queryParam = parm1;

}