Question

I am trying to work with the p:poll JSF tag, and using a code sample I found on the net. But I keep getting an error. The system doesn’t seem to find the property ‘increment’, although it exists in the bean.

I use the following:

<h:outputText id="txt_count" value="#{navBean.count}" /> 
<p:poll actionListener="#{navBean.increment}" interval="1000" update="txt_count" />

It is inside a view, and form, like this:

<f:view>
<h:form>

with the appropriate closing tags. When I hit it, it generates a Property ‘increment’ not found on type com.roberts.ui.NavBean

The increment method is there:

public void increment(ActionEvent actionEvent) {
    count++;
}

What am I doing wrong?

Answer 1

I finally got around to doing this. Here’s a full description & code:

Download the latest prime faces from here: http://www.primefaces.org/downloads.html

Get the documentation pdf, 3.0.RC2, from here:
http://www.primefaces.org/documentation.html

The xmlns for this latest release is: xmlns:p=”http://primefaces.org/ui”

In the xhtml file (for doing the poll every 3 seconds):

<h:form>
<h:outputText id="txt_count" value="#{counterBean.count}" /> 
<p:poll listener="#{counterBean.increment}" interval="3" update="txt_count" />
</h:form>

In the CounterBean:

private int count = 1;

public int getCount() {  
    return count;  
}  

public void setCount(int count) {  
    this.count = count;  
}  

public void increment() {  
    setCount(getCount() + 1);  
}   

That’s all. It works flawlessly.