I have a rich:componentControl which sets a parameter called applicationId and displays a rich:contextMenu:
<rich:componentControl event="onRowClick" for="ctxMenu" operation="show">
<f:param value="#{item[1].applicationId}" name="applicationId"/>
</rich:componentControl>
and here's the rich:contextMenu:
<rich:contextMenu id="ctxMenu" submitMode="ajax"> ...