Wicket: Getting Tags Attribute

I am combining wicket and jQuery for some project.

I have in HTML:

<a wicket:id="link" testAttr="test"></a>   

And using jQuery I modify this attribute when other components on the page are clicked. My question here is how to obtain the current value of attribute "testAttr" from Java? I am fetching the value on every ajax call and see with inspect element that is changed, so no problem with that.

I have tried with getMarkupAttributes() but I always get value "test" and not the current one which I see on the page with inspect element. Also tried with AttributeModifier and Appender, onComponentTag, but had no luck.

Does anybody have an idea what to do here?