af:poll stops polling on bean method call

Question

Using JDev 10.1.3.5.0. Yes, it's archaic.
I've spent the past two days trying to get a <af:poll> component to work with no success. I've gone through tutorials and gotten them to work, but my personal use case will not.
A dialog window opens. When this dialog loads, a poll component begins refreshing a progress indicator every 2 seconds. This works; I can see the refresh happening. Inside this dialog, a user then clicks a "Start" button, triggering an actionEvent method.
    public void startAction(ActionEvent actionEvent) {
        // initialize progress indicator's range model to 0
        this.simpleBoundedRangeModel.start(actionEvent);
        // Begin performing a business process.
        ManagementDashboardExport pbm = (ManagementDashboardExport)EL.get("#{ManagementDashboardExport}");
        pbm.exportDashboard();
    }In that bean, a process runs which then updates the progress indicator's model
    public String exportDashboard(){
        private PollingBackingBean pbm = (PollingBackingBean)EL.get("#{PollingBB}");
        // do a bunch of work and at a certain milestone, set that 20% of the work has been done.
        pbm.getSimpleBoundedRangeModel().setValue(20);
        // continue doing work
     }The problem is that at the point exportDashboard() begins, the polling quits! The program keeps running and eventually finishes, but the progress indicator never refreshes.
How can a file download/upload process work, but my process not? This seems like some kind of threading issue. I'm trying to show the progress of a running process. Any ideas on how I can get this to work?
Thanks,
Will
PS: The .jspx code and PollingBackingBean class
        <af:form id="f1">
          <af:panelGroup id="pgl1">
            <af:panelGroup id="pgl2" layout="horizontal">
              <af:commandButton text="Start" id="cb1" partialSubmit="true" actionListener="#{PollingBB.startAction}"/>
              <af:objectSpacer width="10" height="10" id="s1"/>
              <af:commandButton text="Cancel" id="cb2" partialSubmit="true" actionListener="#{PollingBB.cancelAction}"/>
            </af:panelGroup>
            <af:objectSpacer width="10" height="10" id="s2"/>
            <af:poll interval="2000" id="poll" pollListener="#{PollingBB.pollMe}" binding="#{PollingBB.pollComponent}" rendered="true"/>
            <af:progressIndicator id="pi1" rendered="true" partialTriggers="poll" value="#{PollingBB.simpleBoundedRangeModel}"/>
          </af:panelGroup>
        </af:form>
public class PollingBackingBean {
    SimpleBoundedRangeModel simpleBoundedRangeModel;
    private int pollInterval = -1;
    private CorePoll pollComponent;
    public void startAction(ActionEvent actionEvent) {
        this.simpleBoundedRangeModel.start(actionEvent);
        ManagementDashboardExport pbm = (ManagementDashboardExport)EL.get("#{ManagementDashboardExport}");
        pbm.exportDashboard();
    public void cancelAction(ActionEvent actionEvent) {
        this.pollInterval = -1;
        this.pollComponent.setRendered(false);
        this.simpleBoundedRangeModel.cancelProcess(actionEvent);
        AdfFacesContext.getCurrentInstance().addPartialTarget(this.pollComponent);
    public void pollMe(PollEvent pollEvent) {
        if (this.simpleBoundedRangeModel != null) {
            if (this.simpleBoundedRangeModel.getValue() < this.simpleBoundedRangeModel.getMaximum()) {        
                System.out.println("Polling Event Triggered");
            } else {
                this.pollInterval = -1;
                AdfFacesContext.getCurrentInstance().addPartialTarget(this.pollComponent);
                this.simpleBoundedRangeModel.setValue(0L);
    public SimpleBoundedRangeModel getSimpleBoundedRangeModel() {
        if (this.simpleBoundedRangeModel == null)
            this.simpleBoundedRangeModel = new SimpleBoundedRangeModel();
        return this.simpleBoundedRangeModel;
    public void setPollInterval(int pollInterval) {
        this.pollInterval = pollInterval;
    public int getPollInterval() {
        return pollInterval;
    public void setPollComponent(CorePoll pollComponent) {
        this.pollComponent = pollComponent;
    public CorePoll getPollComponent() {
        return pollComponent;
}

Answer 1

I am using a recent version but this is a thread that Google took me to when searching "start stop af:poll"
I had my Eureka moment yesterday and have everything working now but maybe for the benefit of others I will describe my case here:
What I want to do is start a background task that performs some long running task taking several minutes.
This task updates a progress number in a DB table while it is progressing.
During this task I want to popup a modal dialog with a progress bar.
In order to update the progress bar I want to client to poll and execute and read to iterator for the VO containing the record with the progress percent.
When the task is complete I want polling to stop.
My solution consists of an jspx page and viewScope Bean
on the jspx page:
I have an af:commandButton to start the task with id="cbstart" and an actionListener in a Bean
an af:popup containing and af:dialog containing an af:progressIndicator  bound to a BoundedRangeModel in the Bean
an af:poll id="poll" pollListener set to a method named poll in the Bean also bind it to a poller object in the Bean.
Set the interval to -1 so it starts off disabled.
Now look at this from the point of view of what initiates work there are only 2 types of actions:
1 The push on the command button
2 The poll events
1. When the command button is pushed
* start the actual task
* start the poller
* popup the dialog
So in the bean this looks like:
    public void onCbStart(ActionEvent actionEvent) {
        startTask(); // kicks of background task
        // popup the popup
        RichPopup.PopupHints hints = new RichPopup.PopupHints();
        popup.show(hints);
        // enable the popup
        poll.setInterval(2000);
This was at first not working for me because I did not really understand PPR. Polling is done by the browser. On the server side the poll object is now has its interval property set to 2000 but in the client it does not know about it yet. We should have made sure we set cbstart as a partialTrigger
of the ad:poll so the client side poll object will update its state after the press of the command button.
2, Now on the poll event ifself in the bean add code like this:
   public void poll(PollEvent pollEvent) {
        // re-execute query so we can get current progress value
        DCBindingContainer bc = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
        OperationBinding exe = bc.getOperationBinding("ExecuteWithParams");
        exe.execute();
        // get current progress value
        AttributeBinding obj = (AttributeBinding)bc.getControlBinding("Progress");
        BigDecimal iv = (BigDecimal)obj.getInputValue();
       // Update progress in our BoundedRangeModel
       rm.setProgress(iv.intValue());
       // If we reach 100% we are done
        if ( rm.getValue() >= rm.getMaximum() ) {
            // stop polling
            poll.setInterval(-1);           
So what client side components may require updates after a poll?
1 - progressIndicator
So we add poll to the partial triggers of the af:progressIndicator
Again I was baffled at first why the polling did not stop. Then I finally figured out that the poll object itself needs to have poll as a partial trigger since in the poll we change its interval to -1 in order to disable it and it need to read to back on the client
So partial triggers for the af:poll need to be "cbstart poll"
Lessons learned:
1 - If you need to have more than 1 thing happen from a button press like for example, start solve, popup, start polling, you need to do this through a bean and not just using bindings.
2 - Think about the 'starting' actions on the page and all the resulting parts of the page that may have their state changed resuling from that initial event and set your partial triggers based on that.
Jeroen