ADF partialTrigger -v- AJAX

Question

Hi,
I have the following in an application
<af:selectOneChoice id="cobs" value="#{cobBean.cob}" immediate="true" label="Class of Business" autoSubmit="true">
<f:selectItems value="#{cobBean.cobs}"/>
</af:selectOneChoice>
<af:selectOneChoice id="ets" value="#{errorTypeBean.errorType}" immediate="true" partialTriggers="cobs"
label="Class of Business">
<f:selectItems value="#{errorTypeBean.errorTypes}"/>
</af:selectOneChoice>
When I change cobs, it will update ets based on the selection in cobs.
My question is...does using partial triggers with immediate="true" have exactly the same behaviour as AJAX - i.e. does it perform an Asynchronous request to the server for the same values.
In IE, when viewing a page (Yahoo Mail) I know uses AJAX, when a request is made, the globe in the top right hand corner does not spin meaning the page has not been refreshed. However, when I use ADF tags, the globe does spin - indicating the page has been refreshed.
Please could you confirm the behaviour of a partial trigger - I have seen a blog that suggests they implement Ajax and should not refresh the page, but I am not convinced.
Regards

Answer 1

Hi,
My question is...does using partial triggers with immediate="true" have exactly the same behaviour as AJAX - i.e. does it perform an Asynchronous request to the server for the same values.
immediate= true only means that the JSF lifecycle is bypassed. The internal communication in ADF Faces is not Ajax but uses hidden iFrame (which is why the right corner icon keeps spinning).
More information:
http://www.oracle.com/technology/tech/java/newsletter/articles/ajaxweb2/ajax_web20_without_ajax.html
Frank