Having more control over what goes into an L2 cache is desirable for some systems. Currently JDO(2) provides no control other than the pin/unpin/evict methods on the DataStoreCache. One way of providing more control would be to allow specification via metadata (XML/annotations) for classes/fields.
Propose: Add a "cacheable" attribute to class/field XML elements with default value of "true". Add a "cacheable" property to @PersistenceCapable/@Persistent with default value of true. The user can then define particular classes to never be L2 cached, and also particular fields to never be L2 cached. Comments ? -- Andy (DataNucleus - http://www.datanucleus.org)
