Spring Open View In Session Pattern For Portlets

I needed to implement the Open Session In View pattern for a portlet using Spring (3 with annotations) and Hibernate.
This pattern allows lazily loaded objects to have access to the Hibernate Session for the entire processing of the render request despite the original transaction (associated to the portlet request) already being completed.
I.e. If you have One To Many associations, this allows you to load the Many side of the association in the same thread of the request where you loaded the One side.

What I needed to do is:
Add a WebRequestHandlerInterceptorAdapter interceptor wrapping the stantard OpenSessionInViewInterceptor to applicationContext.xml:

<bean name="openSessionInViewInterceptor"
   class="org.springframework.web.portlet.handler.WebRequestHandlerInterceptorAdapter">
   <constructor-arg>
       <bean class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">
           <property name="sessionFactory" ref="sessionFactory"/>
       </bean>
   </constructor-arg>
</bean>

then add it to the DefaultAnnotationHandlerMapping in yourPortlet-portlet.xml:

<bean id="annotationMapper"
   class="org.springframework.web.portlet.mvc.annotation.DefaultAnnotationHandlerMapping">
   <property name="order" value="10" />
   <property name="interceptors">
       <list>
           <ref bean="openSessionInViewInterceptor"/>
       </list>
   </property>
</bean>