org.apache.ratis.statemachine.impl

Class SimpleStateMachineStorage

java.lang.Object

org.apache.ratis.statemachine.impl.SimpleStateMachineStorage

All Implemented Interfaces:

StateMachineStorage

public class SimpleStateMachineStorage
extends Object
implements StateMachineStorage

A StateMachineStorage that stores the snapshot in a single file.

Field Summary

Fields

Modifier and Type	Field and Description
static Pattern	SNAPSHOT_REGEX snapshot.term_index

Constructor Summary

Constructors

Constructor and Description
SimpleStateMachineStorage()

Method Summary

Modifier and Type	Method and Description
void	cleanupOldSnapshots(SnapshotRetentionPolicy snapshotRetentionPolicy)
SingleFileSnapshotInfo	findLatestSnapshot()
void	format()
protected File	getCorruptSnapshotFile(long term, long endIndex)
protected static String	getCorruptSnapshotFileName(long term, long endIndex)
SingleFileSnapshotInfo	getLatestSnapshot()
File	getSmDir()
File	getSnapshotFile(long term, long endIndex)
static String	getSnapshotFileName(long term, long endIndex)
static TermIndex	getTermIndexFromSnapshotFile(File file)
protected File	getTmpSnapshotFile(long term, long endIndex)
protected static String	getTmpSnapshotFileName(long term, long endIndex)
void	init(RaftStorage rStorage)
void	loadLatestSnapshot()

Methods inherited from class java.lang.Object

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

Field Detail

SNAPSHOT_REGEX

public static final Pattern SNAPSHOT_REGEX

snapshot.term_index

Constructor Detail

SimpleStateMachineStorage

public SimpleStateMachineStorage()

Method Detail

init

public void init(RaftStorage rStorage)
          throws IOException

Specified by:

init in interface StateMachineStorage

Throws:

IOException

format

public void format()
            throws IOException

Specified by:

format in interface StateMachineStorage

Throws:

IOException

cleanupOldSnapshots

public void cleanupOldSnapshots(SnapshotRetentionPolicy snapshotRetentionPolicy)
                         throws IOException

Specified by:

cleanupOldSnapshots in interface StateMachineStorage

Throws:

IOException

getTermIndexFromSnapshotFile

public static TermIndex getTermIndexFromSnapshotFile(File file)

getTmpSnapshotFileName

protected static String getTmpSnapshotFileName(long term,
                                               long endIndex)

getCorruptSnapshotFileName

protected static String getCorruptSnapshotFileName(long term,
                                                   long endIndex)

getSnapshotFile

public File getSnapshotFile(long term,
                            long endIndex)

getTmpSnapshotFile

protected File getTmpSnapshotFile(long term,
                                  long endIndex)

getCorruptSnapshotFile

protected File getCorruptSnapshotFile(long term,
                                      long endIndex)

findLatestSnapshot

public SingleFileSnapshotInfo findLatestSnapshot()
                                          throws IOException

Throws:

IOException

loadLatestSnapshot

public void loadLatestSnapshot()
                        throws IOException

Throws:

IOException

getSnapshotFileName

public static String getSnapshotFileName(long term,
                                         long endIndex)

getLatestSnapshot

public SingleFileSnapshotInfo getLatestSnapshot()

Specified by:

getLatestSnapshot in interface StateMachineStorage

getSmDir

public File getSmDir()