How to stop poll?

[jey]

Hi there,

Is there a way to stop polling without clicking any buttons? The polling should start as soon I go to a page and stop when actionListener reads duration == 0

Code: Select all

private boolean stopPollingPanel1 = true;

public void checkNextDurationPanel1(ActionEvent actionEvent) {

     if (isStopPollingPanel1()) {

          duration = this value is coming from database;

          if (duration == 0) {
              stopPollingPanel1 = false; 
                    //populate database results in the RequestBean
          }
    }
}

Any help would be much appreciated!

Thank you
Jey.

[G-rom]

<p:poll interval="2" autoStart="true" onsuccess="poll.stop();" widgetVar="poll" />

reading dont kill http://www.primefaces.org:8080/prime-sh ... rtStop.jsf

[jey]

Thank you so much for your reply, but polling stops after first request. I want polling to continue for couple of requests.

Thanks.

[G-rom]

if you want it to stop after a number of request, then count them, or act on a boolean inside your bean, and evaluate it to know if you have to stop after each success.

[cagatay.civici]

Hi, this is quite easy to implement with using poll client side api and Request callback params.

Code: Select all

public void checkNextDurationPanel1(ActionEvent actionEvent) {

     if (isStopPollingPanel1()) {

          duration = this value is coming from database;

          if (duration == 0) {
              RequestContext.getCurrentInstance().addCallbackParam("stopPoll", true);
          }
    }
}

Code: Select all

<p:poll actionListener="#{bean.checkNextDurationPanel1}" oncomplete="handlePollRequestComplete(xhr, status, args)" widgetVar="mypoll" />

Code: Select all

function handlePollRequestComplete(xhr, status, args) {
 if(args.stopPoll) {
   mypoll.stop();
 }
}

Let me know if this is not clear, basically you pass a flag from your actionlistener to the ajax oncomplete event, your javascript oncomplete event checks if you have passed this flag called stopPoll, if so poll is stopped.

[danielandross]

Hello,
I am having a problem with that solution:
The logic seem to work as my database calls will stop at the correct time.

But since I added this to my poll: ( actionListener, oncomplete, widgetVar ) the datatable I updated using attribute "update" won't refresh anymore (meaning the whole polling is useless now).
Before I added the three attributes the refresh worked properly.

Can you help me to get refresh and the poll stop working together?

The whole poll altogether looks like this:

Code: Select all

<p:poll interval="2"
				actionListener="#{bean.checkNextDurationPanel1}"
				oncomplete="handlePollRequestComplete(xhr, status, args)"
				widgetVar="mypoll" listener="#{bean.loadData}"
				update="DataTable" />

Thank you for support.

edit: The problem seems to be that I cannot use both the attribute "update" AND "oncomplete" together. But How Am I supposed to update my datatable then?