Getter Called Multiple Times When Using <a4j:poll>

[damendra]

Hi,

I have been using <a4j:poll> to render a segment of a .xhtml page but the underlying bean getter method is being called multiple times, potentially causing a performance issue but also unexpected behaviour.

The code is as following

.xhtml:
<a4j:region>
  <h:form>
     <a4j:poll id="poll" interval="2000" enabled="true" reRender="numberGrid" />
  </h:form>
</a4j:region>

<h:panelGrid>     
   <h:outputText id="numberGrid" value="#{number}" />
</h:panelGrid>

Bean:
@Name("number")
public class RandomNumber() {

    private int number;

    @Unwrap
    public getNumber(){
      Random random = new Random();
      number = random.nextInt(12);

      return number;
    }

}

Can anyone help explain and throw some light on an alternative solution?

Regards