Package org.jgroups.raft.filelog

Class FilePositionCache

java.lang.Object

org.jgroups.raft.filelog.FilePositionCache

public class FilePositionCache
extends Object

A mapping between the RAFT log index and where the log entry is stored in a file.

Since:

0.5.4

Author:

Pedro Ruivo, Francesco Nigro

Field Summary

Fields

Modifier and Type	Field	Description
static final int	EMPTY
static final int	TOO_OLD

Constructor Summary

Constructors

Constructor	Description
FilePositionCache(long firstLogIndex)
FilePositionCache(long firstLogIndex, int requiredPages)

Method Summary

Modifier and Type	Method	Description
FilePositionCache	createDeleteCopyFrom(long logIndex)
long	getFirstAppended()
long	getFirstLogIndex()
long	getPosition(long logIndex)
boolean	invalidateFrom(long logIndex)
boolean	set(long logIndex, long position)

Methods inherited from class java.lang.Object

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

Field Details

TOO_OLD

public static final int TOO_OLD

See Also:

• Constant Field Values

EMPTY

public static final int EMPTY

See Also:

• Constant Field Values

Constructor Details

FilePositionCache

public FilePositionCache(long firstLogIndex)

FilePositionCache

public FilePositionCache(long firstLogIndex,
 int requiredPages)

Method Details

getFirstLogIndex

public long getFirstLogIndex()

getPosition

public long getPosition(long logIndex)

set

public boolean set(long logIndex,
 long position)

getFirstAppended

public long getFirstAppended()

invalidateFrom

public boolean invalidateFrom(long logIndex)

createDeleteCopyFrom

public FilePositionCache createDeleteCopyFrom(long logIndex)