Question

I have a managed bean under ViewScope. It has an instance variable inside it.

MetaData object has a inputItem object List.

@ManagedBean
@ViewScoped
public class ConBean implements Serializable {

     private MetaData metadata;

     @PostConstruct
     @SuppressWarnings("unchecked")
     public void init() throws IOException {
       this.metadata = new MetaData ();
     }

     public void proc(){
        List<InputItem> inputs= new ArrayList<InputItem>();
        inputs.add(***** code to populate the inputItem List);
        //after populating, inputs added to the metadata
        metadata.setInputs(inputs);

     }

//getters & setters
}

---

in my JSF , input list is populated inside a UI repeat.

<div id="inputplaceholder">
<ui:repeat value="#{conBean.metaData.inputs}" var="content">

</ui:repeat>
</div>

the div inputplaceholder is periodically updated using a richfaces poll.

<a4j:poll id="poll" interval="12000" action="#{conBean.proc}"
                                  execute="@form" render="inputplaceholder"/>

---

The problem that I have is even though inputItems are set to the metaData object correctly inside the proc() method, when the view is rendered/partially updated, it doesn’t get highlighted in the UI. so partial update takes no effect. I tried moving

this.metadata = new MetaData ();
inside the proc method but had no luck.

any ideas and help is highly appreciated.

thanks …

Answer 1

Did the partial render really take place? This is impossible. There is namely no JSF component with the ID inputplaceholder. You assigned it to a plain HTML <div> element. Replace it by a fullworthy JSF component:

<h:panelGroup layout="block" id="inputplaceholder">

Also, since you used a relative ID in the render attribute, it will only scan for components in the same parent naming container component. The <ui:repeat> is such one, however the component with the desired ID is placed outside it. You’d like to use an absolute ID instead. Assuming that it’s inside a <h:form> with a fixed ID:

<h:form id="myform">
    <h:panelGroup layout="block" id="inputplaceholder">
        ...

then you should be referencing it in the render attribute as follows

render=":myform:inputplaceholder"