org.neo4j.io.pagecache.tracing.cursor.context

Class EmptyVersionContext

java.lang.Object

org.neo4j.io.pagecache.tracing.cursor.context.EmptyVersionContext

All Implemented Interfaces:

VersionContext

public class EmptyVersionContext
extends Object
implements VersionContext

VersionContext that does not perform any kind of version tracking for cases when its not required.

See Also:

VersionContext

Field Summary

Fields

Modifier and Type	Field and Description
static VersionContext	EMPTY

Method Summary

Modifier and Type	Method and Description
long	committingTransactionId() Context currently committing transaction id
void	initRead() Initialise read context with latest closed transaction id as it current version.
void	initWrite(long committingTransactionId) Initialise write context with committingTxId as modification version.
boolean	isDirty() Check whenever current context is dirty
long	lastClosedTransactionId() Last closed transaction id that read context was initialised with
void	markAsDirty() Mark current context as dirty

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final VersionContext EMPTY

Method Detail

initRead

public void initRead()

Description copied from interface: VersionContext

Initialise read context with latest closed transaction id as it current version.

Specified by:

initRead in interface VersionContext

initWrite

public void initWrite(long committingTransactionId)

Description copied from interface: VersionContext

Initialise write context with committingTxId as modification version.

Specified by:

initWrite in interface VersionContext

Parameters:

committingTransactionId - currently committing transaction id

committingTransactionId

public long committingTransactionId()

Description copied from interface: VersionContext

Context currently committing transaction id

Specified by:

committingTransactionId in interface VersionContext

Returns:

committing transaction id

lastClosedTransactionId

public long lastClosedTransactionId()

Description copied from interface: VersionContext

Last closed transaction id that read context was initialised with

Specified by:

lastClosedTransactionId in interface VersionContext

Returns:

last closed transaction id

markAsDirty

public void markAsDirty()

Description copied from interface: VersionContext

Mark current context as dirty

Specified by:

markAsDirty in interface VersionContext

isDirty

public boolean isDirty()

Description copied from interface: VersionContext

Check whenever current context is dirty

Specified by:

isDirty in interface VersionContext

Returns:

true if context is dirty, false otherwise