CLASS Name: POP::Persistent Desc: This is the persistent base class for POP. It handles all of the persistence logic by using a tied hash implementation to intercept all attribute fetches and stores. The basic algorithm is to update the changed attribute on a store, and reload the object from persistence on fetch if any attribute has been changed by another process since the last load. There are a number of additional optimizations. See the POP documentation for more details.

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