Class TxnResourceApiSerializable

java.lang.Object

org.aksw.commons.txn.impl.TxnResourceApiReadUncommitted<TxnSerializable>

org.aksw.commons.txn.impl.TxnResourceApiSerializable

All Implemented Interfaces:

TxnResourceApi, TxnComponent

public class TxnResourceApiSerializable
extends TxnResourceApiReadUncommitted<TxnSerializable>

Api to a resource w.r.t. a transaction.

Author:

raven

Field Summary

Fields

Modifier and Type	Field	Description
protected com.google.common.cache.Cache<Path<String>, Boolean>	accessCache
protected Path	journalEntryFile
protected ResourceLock<String>	resourceLock
protected ReadWriteLockWithOwnership	txnResourceLock

Fields inherited from class TxnResourceApiReadUncommitted

fileSync, resFileAbsPath, resFilePath, resKey, txn

Constructor Summary

Constructors

Constructor	Description
TxnResourceApiSerializable(TxnSerializable txn, Path<String> resKey)

Method Summary

Modifier and Type	Method	Description
void	declareAccess()	Declare that the txn accessed the resource.
void	declareAccessCore()
ReadWriteLockWithOwnership	getTxnResourceLock()
boolean	isVisible()	Whether the resource is visible to the transaction
void	undeclareAccess()	Remove access declaration from the txn to this resource.

Methods inherited from class TxnResourceApiReadUncommitted

finalizeCommit, getFileSync, getLastModifiedDate, getResourceKey, preCommit, putContent, rollback

Methods inherited from class Object

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

Methods inherited from interface TxnResourceApi

lock, unlock

Field Details

journalEntryFile

protected Path journalEntryFile

resourceLock

protected ResourceLock<String> resourceLock

txnResourceLock

protected ReadWriteLockWithOwnership txnResourceLock

accessCache

protected com.google.common.cache.Cache<Path<String>, Boolean> accessCache

Constructor Details

TxnResourceApiSerializable

public TxnResourceApiSerializable(TxnSerializable txn,
 Path<String> resKey)

Method Details

getTxnResourceLock

public ReadWriteLockWithOwnership getTxnResourceLock()

Specified by:

getTxnResourceLock in interface TxnResourceApi

Overrides:

getTxnResourceLock in class TxnResourceApiReadUncommitted<TxnSerializable>

isVisible

public boolean isVisible()

Description copied from interface: TxnResourceApi

Whether the resource is visible to the transaction

Specified by:

isVisible in interface TxnResourceApi

Overrides:

isVisible in class TxnResourceApiReadUncommitted<TxnSerializable>

declareAccess

public void declareAccess()

Description copied from interface: TxnResourceApi

Declare that the txn accessed the resource. Upon recovery the resource will be checked for any uncommitted changes.

Specified by:

declareAccess in interface TxnResourceApi

Overrides:

declareAccess in class TxnResourceApiReadUncommitted<TxnSerializable>

declareAccessCore

public void declareAccessCore()

undeclareAccess

public void undeclareAccess()

Description copied from interface: TxnResourceApi

Remove access declaration from the txn to this resource. Recovery related to this txn will not consider the resource.

Specified by:

undeclareAccess in interface TxnResourceApi

Overrides:

undeclareAccess in class TxnResourceApiReadUncommitted<TxnSerializable>