How to set value size limit in JPA storage service ?

[Tom Zeller]

How should I set the value size limit when using a JPA storage service ?

I copied the example Spring configuration[1] from the
JPAStorageServiceTest, add added the valueSize property, which is
indeed being set during initialization, but apparently _after_
Hibernate creates the table.

<bean id="shibboleth.StorageService"
  class="org.opensaml.storage.impl.JPAStorageService"
  ...
  p:valueSize="2048" />

So, even though the valueSize is "2048", the table is created with varchar(255).

I ask because when storing sessions server-side, i.e. setting
idp.session.StorageService = shibboleth.StorageService, 255 is too
small.

[1] http://svn.shibboleth.net/view/java-opensaml/trunk/opensaml-storage-impl/src/test/resources/org/opensaml/storage/impl/jpa-spring-context.xml?view=markup