Using JSF to make AJAX calls to PrimeFaces components

Hey, I'm looking to periodically call a back bean from a JavaScript function in order to refresh a panel on my page without refreshing the entire page. Here's the script I've written:

$('#submitbutton').click();

<h:commandButton id="submitbutton" immediate="true" value="" styleClass="ui-day" style="border:0;display : none;" 
                            action="#{liveGraphBean.plotInterval1('daily')}" >

Instead of refreshing the whole page, I want to only refresh a specific panel on the page.

<p:panel id="dailyGraphPanel">
                    <div id="chartdiv" style="width: 100%; height: 400px;"></div>
                </p:panel>

Any suggestions on how I can achieve this? Thanks!

javascriptajaxjsfprimefaces

Answer №1

If you're looking to incorporate polling functionality into your web application, consider using the Primeface Poll tag.

Check out examples of how to implement this feature here: http://www.primefaces.org/showcase/ui/ajax/poll.xhtml

Another useful resource is the Primeface Remote Command widget, which can be found at: http://www.primefaces.org/showcase/ui/ajax/remoteCommand.xhtml

<h:commandButton id="submitbutton" immediate="true" value="Submit" styleClass="ui-day" style="border:0;display : none;" action="#{liveGraphBean.plotInterval1('daily')}">
    <f:ajax render="dailyGraphPanel" execute="@this"/>
</h:commandButton>

Alternatively, you can achieve similar functionality with the following code:

<p:commandButton id="submitbutton" immediate="true" value="Submit" styleClass="ui-day" style="border:0;display : none;" action="#{liveGraphBean.plotInterval1('daily')}" update="dailyGraphPanel" process="@this" />

<h:panelGroup id="dailyGraphPanel">
  <div id="chartdiv" style="width: 100%; height: 400px;"></div>
</h:panelGroup>

Answer №2

For those looking to streamline their code, I recommend utilizing http://www.primefaces.org/showcase/ui/ajax/poll.xhtml

In my opinion, it would be easier and cleaner to synchronize the refresh of your chart component #chartdiv with your panel refresh.

If you're facing constraints or need a quick fix, consider switching from:

<h:commandButton id="submitbutton" immediate="true" value="" styleClass="ui-day" style="border:0;display : none;" action="#{liveGraphBean.plotInterval1('daily')}" >

to:

<p:commandButton id="submitbutton" immediate="true" value="" styleClass="ui-day" style="border:0;display : none;" action="#{liveGraphBean.plotInterval1('daily')}" update="dailyGraphPanel">

Depending on the positioning of your p:commandButton and p:panel, you may need to adjust the component path for updating or use PrimeFaces' p:component function:

<p:commandButton id="submitbutton" immediate="true" value="" styleClass="ui-day" style="border:0;display : none;" action="#{liveGraphBean.plotInterval1('daily')}" update="#{p:component}">

The h:commandButton documentation does not mention the update attribute, but it is available in p:commandButton's documentation. You can find more information about partial rendering in the "Partial Rendering" section of the PrimeFaces user guide here.

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