HTML - Xhtml Commandlink

Good morning everybody. I'm stuck in a problem i have more then one week about this command. My objective in this case is using this option on my page, i want to create a file periodically(that part has no problem, it works fine), but also i want to load that created file in another page every time is created. As far as i know, by using only the "action" attribute, the second page only comes after all the operation are completed. Particulary in this case i have a java class that generates (by a loop of 14 times) a .kml file(I'm using StAX and also the creation works fine) including the "Thread.Sleep(9000);" instruction . So when i found that problem, i thought "then i should try to use a second attribute calling the second page i need" and so i found the "actionListener" attribute. But the "actionListener" receives void unlike "action". Again i thought, then i'll just create one single "kml" file and return the second page, after i'll use the "actionListener" to do the rest of the files creation as the second page(using a javascript file) loads the created files", just like this:

<h:commandLink id="page2" action="#{instruction returning the new page}" actionListener="#{creation of the kml files}">
<hutputText value="#{name of the link}" />
</h:commandLink>

And so i realized that the "action" attribute only starts when the "actionListener" is completed. So problem i got is right this, because if i try to create one single file and return the second page by the "actionListener", just the kml file is created and nothing more. On the other hand, the "action" never comes first unless there's a way to define priority between these two attributes and i still don't know. I tried many ways, searching for informations on the internet, but nothing until now.
Examples of what i tried:

<h:commandLink id="page2" action="#{instruction returning the new page}" >
<hutputText value="#{name of the link}" />
<f:actionListener...
</h:commandLink>

Still the "action" only comes last;

<h:commandLink id="page2" action="#{instruction returning the new page}" target="_blank" actionListener="#{creation of the kml files}">
<hutputText value="#{name of the link}" />
</h:commandLink>

Even using a javascript file to open the new page, it doesn't work, it always returns the first and after the "actionListener" finishes its execution.

I also tried the <h:link..., but unfortunally this one doesn't support the "action" nor the "actionListener". Using this inside the <h:commandlink doesn't make any difference and the same goes if i do the inverse.

At this moment i'm trying to open the second page exactly on the javaclass to see if that works, but i got a null pointer exception. The code i used is this:

public void loadMapPage(String page) {
URL url = null;

try {
url = new URL(page);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

if(url != null) {
getAppletContext().showDocument(url);
}
}
and i get a "NullPointerException". I'll try to find a way to open the page, but i really need help on this. Any sugestion would be great....