Red Hat JBoss Enterprise Application Platform 6.4.19.GA

Package org.hibernate.cache.spi.access

Defines contracts for transactional and concurrent access to cached entity and collection data.

See: Description

Package org.hibernate.cache.spi.access Description

Defines contracts for transactional and concurrent access to cached entity and collection data. Transactions pass in a timestamp indicating transaction start time which is then used to protect against concurrent access (exactly how that occurs is based on the actual access-strategy impl used). Two different implementation patterns are provided for:

The asynchronous access strategies are: read-only, read-write and nonstrict-read-write. The only synchronous access strategy is transactional.

Note that, for an asynchronous cache, cache invalidation must be a two step process (lock->unlock or lock->afterUpdate), since this is the only way to guarantee consistency with the database for a nontransactional cache implementation. For a synchronous cache, cache invalidation is a single step process (evict or update). Hence, these contracts (EntityRegionAccessStrategy and CollectionRegionAccessStrategy) define a three step process to cater for both models (see the individual contracts for details).

Note that query result caching does not go through an access strategy; those caches are managed directly against the underlying QueryResultsRegion.

Red Hat JBoss Enterprise Application Platform 6.4.19.GA

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