Is it possible to stop an AjaxBehaviorEvent listener or send extra information to the f:ajax onevent function?

In the controller, I have created a listener that looks something like this:

public class FooController {
    public void doSomething(AjaxBehaviorEvent evt) {
        closeDialogFlag = true;
        ..
        if(!isValid){
            closeDialogFlag = false;
        }
    }
}

Here is my JSF button:

<h:commandButton value="Do something">
    <f:ajax 
        listener="#{fooController.doSomething}"
        execute=":editDialogForm:processTab" render="@this :editDialogForm:processTab :messageViewer:messageViewerPanel :results"
        onevent="function(data){ if(data.status === 'success' &amp;&amp; #{fooController.closeDialogFlag} ) { $('#migrationEditDialogModal').modal('hide'); } }"
    />
</h:commandButton>

However, the closeDialogFlag does not work after the AJAX request is completed. This is because the value of #{fooController.closeDialogFlag} is extracted when the page loads and is not updated after the AJAX request. I need to refresh the page to see the new value in the output code.

The question is: How can I pass additional information to data in onevent=function(data) in my listener? (This solution is more appropriate for me as it will be useful in various cases) OR Is there any way to abort my request in my listener and force my AJAX request to return a status other than success?

PS: I prefer not to use Primefaces, Richfaces, etc.

Edit: Small correction. If I add the attribute @this to the f:ajax tag's render value, then my flag is successfully extracted as true. However, after my AJAX request, my dialog does not hide using the JavaScript function.

Answer №1

Looking for a solution to your specific issue? Here's a helpful trick:

  1. Include a hidden input field like
    <h:inputHidden id="closeDialogFlag" value="#{fooController.closeDialogFlag}"/>
    within the same form where your command button is located. Assume that #{fooController.closeDialogFlag} is a boolean.
  2. Within your f:ajax:
    1. Ensure to render the component closeDialogFlag.
    2. Adjust the condition in the onevent to:
      function(data){ if(data.status === 'success' &amp;&amp; $('input#closeDialogFlag').val() === 'true') { $('#migrationEditDialogModal').modal('hide'); } }

Keep in mind to replace $('input#closeDialogFlag') with the correct ID based on the parent elements.

This method is effective because once data.status === 'success', the components are updated with their new values.

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