Here's the quick and dirty on how to define, inject, reference a Session object (ASO in tapestry terms).
My hivemodule.xml: <contribution configuration-id="tapestry.state.ApplicationObjects"> <state-object name="userSession" scope="session"> <create-instance class="orgname.service.UserSession"/> </state-object> </contribution> My Example.page file that requires the ASO: <inject property="userSession" type="state" object="userSession"/> My Example.java class that uses the session: public abstract UserSession getUserSession();