[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2808) CLONE -Impossible to define caching for a subclass's collection in hibernate.cgf.xml

[Sebastien Blind (JIRA)]

CLONE -Impossible to define caching for a subclass's collection in hibernate.cgf.xml 
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                 Key: HHH-2808
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2808
             Project: Hibernate3
          Issue Type: Bug
          Components: caching (L2)
    Affects Versions: 3.2.5
         Environment: Hibernate 3.2.5
Sybase
            Reporter: Sebastien Blind


Basically, hibernate allows to define <cache usage="transactional"/> inside the subclass mapping, i.e.
<subclass name="SubClass" extends="BaseClass" discriminator-value="xxx">
        <bag name="subClassLinks" lazy="false" inverse="true" batch-size="100">
            <cache usage="transactional" region="xxx"/>
    		<key column="xxx" not-null="true"/>
    		<one-to-many class="xxx"/>
        </bag>    
    
        <join table="xxx">
        </join>
</subclass>

but it's not allowed to do the same using <collection-cache collection="subClass.myCollection" region="xxx" usage="transactional"/>.

It throws:
Exception in thread "main" org.hibernate.MappingException: Cannot cache an unknown collection: subClass.myCollection
	at org.hibernate.cfg.Configuration.setCollectionCacheConcurrencyStrategy(Configuration.java:1984)
	at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1568)
	at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
	at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
	at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)

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