org.apache.polygene.spi.entitystore

Class ConcurrentModificationCheckConcern

java.lang.Object

org.apache.polygene.api.concern.ConcernOf<EntityStore>

org.apache.polygene.spi.entitystore.ConcurrentModificationCheckConcern

All Implemented Interfaces:

EntityStore

public abstract class ConcurrentModificationCheckConcern
extends ConcernOf<EntityStore>
implements EntityStore

Concern that helps EntityStores do concurrent modification checks.

It caches the versions of state that it loads, and forgets them when the state is committed. For normal operation this means that it does not have to go down to the underlying store to get the current version. Whenever there is a concurrent modification the store will most likely have to check with the underlying store what the current version is.

Field Summary

Fields inherited from class org.apache.polygene.api.concern.ConcernOf

next

Constructor Summary

Constructors

Constructor and Description
ConcurrentModificationCheckConcern()

Method Summary

Modifier and Type	Method and Description
EntityStoreUnitOfWork	newUnitOfWork(ModuleDescriptor module, Usecase usecase, Instant currentTime)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.polygene.spi.entitystore.EntityStore

entityStates

Constructor Detail

ConcurrentModificationCheckConcern

public ConcurrentModificationCheckConcern()

Method Detail

newUnitOfWork

public EntityStoreUnitOfWork newUnitOfWork(ModuleDescriptor module,
                                           Usecase usecase,
                                           Instant currentTime)

Specified by:

newUnitOfWork in interface EntityStore