Adding Spring Capabilitites to Hook
create a file service.properties in docroot/WEB-INF/src with the following content:
create the file:docroot/WEB-INF/src/META-INF/ext-spring.xml
In this file, you can now add your beans which you want to be handled by Spring.
Some more advice:
We did this to enhance the funcionality of the DynamicDataList-portlet of Liferay. We wanted to have access to some additional custom classes, which we wrote ourself. To get access to the Bean in the Velocity templates, we needed to get the bean from the Hook-portlet, so we had to get the bean from the portletClassLoader.