JSF 2 - How can I add an Ajax listener method to composite component interface?

I have a JSF 2 composite component that employs some Ajax behavior. I want to add a listener method to the <f:ajax> tag inside my composite component, but the listener method should be provided as a <composite:attribute> in the <composite:interface>.

The <f:ajax> tag inside my composite component is currently hard-coded to a listener like this:

<f:ajax
    event="valueChange"
    execute="@this"
    listener="#{controller.genericAjaxEventLogger}"
    render="#{cc.attrs.ajaxRenderTargets}" />

The listener method on the bean has this signature:

public void genericAjaxEventLogger(AjaxBehaviorEvent event) 
        throws AbortProcessingException {
    // implementation code...
}

I want the composite component to be something like this so the page can supply its own event method, but I can't figure out the correct syntax for the interface.

<f:ajax
    event="valueChange"
    execute="@this"
    listener="#{cc.attrs.ajaxEventListener}"
    render="#{cc.attrs.ajaxRenderTargets}" />

How can I do this?

UPDATED WITH SOLUTION:

I took the approach suggested by BalusC and it works great. The relevant snippets are:

The interface declaration in the composite component

<composite:interface>
    <composite:attribute
        name="myattributeUpdatedEventListener"
        method-signature="void listener()"
        required="true" />
    ...
</composite:interface>

The Ajax tag used in my composite component

<f:ajax
    event="valueChange"
    execute="@this"
    listener="#{cc.attrs.myattributeUpdatedEventListener}"
    render="#{cc.attrs.ajaxRenderTargets}" />

The place in my page where I use the composite component

<h:form>
    <compcomp:myCompositeComponent
        myattributeUpdatedEventListener="#{myBackingBean.updatedEventListenerXYZ}" />
</h:form>

And the method on my backing bean

public void updatedEventListenerXYZ() {
    // do something here...
}