Package com.usatiuk.objects.stores

Class CachingObjectPersistentStore

java.lang.Object

com.usatiuk.objects.stores.CachingObjectPersistentStore

@ApplicationScoped
public class CachingObjectPersistentStore
extends Object

CachingObjectPersistentStore is a caching layer for the SerializingObjectPersistentStore It stores the already deserialized objects in memory. Not (yet) thread safe for writes.

Constructor Summary

Constructors

Constructor	Description
CachingObjectPersistentStore(int sizeLimit)

Method Summary

Modifier and Type	Method	Description
void	commitTx(TxManifestObj<? extends JDataVersionedWrapper> objs, long txId)	Commit the transaction to the underlying store and update the cache.
Snapshot<JObjectKey,JDataVersionedWrapper>	getSnapshot()	Get a snapshot of underlying store and the cache.

Methods inherited from class java.lang.Object

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

Constructor Details

CachingObjectPersistentStore

public CachingObjectPersistentStore(int sizeLimit)

Method Details

commitTx

public void commitTx(TxManifestObj<? extends JDataVersionedWrapper> objs,
 long txId)

Commit the transaction to the underlying store and update the cache. Once this function returns, the transaction is committed and the cache is updated.

Parameters:

objs - the transaction manifest object

txId - the transaction ID

getSnapshot

public Snapshot<JObjectKey,JDataVersionedWrapper> getSnapshot()

Get a snapshot of underlying store and the cache. Objects are read from the cache if possible, if not, they are read from the underlying store, then possibly lazily cached when their data is accessed.

Returns:

a snapshot of the cached store