Package org.apache.iotdb.db.engine.version

Class SimpleFileVersionController

java.lang.Object

org.apache.iotdb.db.engine.version.SimpleFileVersionController

All Implemented Interfaces:

VersionController

public class SimpleFileVersionController
extends java.lang.Object
implements VersionController

SimpleFileVersionController uses a local file and its file name to store the version.

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	FILE_PREFIX
static java.lang.String	UPGRADE_DIR

Constructor Summary

Constructors

Constructor	Description
SimpleFileVersionController(java.lang.String directoryPath)	only used for upgrading
SimpleFileVersionController(java.lang.String directoryPath, long timePartitionId)

Method Summary

Modifier and Type	Method	Description
long	currVersion()	Test only method, no need for concurrency.
static long	getSaveInterval()
long	getTimePartitionId()
long	nextVersion()	Get the next version number.
static void	setSaveInterval(long saveInterval)
void	setTimePartitionId(long timePartitionId)

Methods inherited from class java.lang.Object

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

Field Detail

FILE_PREFIX

public static final java.lang.String FILE_PREFIX

See Also:

Constant Field Values

UPGRADE_DIR

public static final java.lang.String UPGRADE_DIR

See Also:

Constant Field Values

Constructor Detail

SimpleFileVersionController

public SimpleFileVersionController(java.lang.String directoryPath,
                                   long timePartitionId)
                            throws java.io.IOException

Throws:

java.io.IOException

SimpleFileVersionController

public SimpleFileVersionController(java.lang.String directoryPath)
                            throws java.io.IOException

only used for upgrading

Throws:

java.io.IOException

Method Detail

getSaveInterval

public static long getSaveInterval()

setSaveInterval

public static void setSaveInterval(long saveInterval)

getTimePartitionId

public long getTimePartitionId()

setTimePartitionId

public void setTimePartitionId(long timePartitionId)

nextVersion

public long nextVersion()

Description copied from interface: VersionController

Get the next version number.

Specified by:

nextVersion in interface VersionController

Returns:

the next version number.

currVersion

public long currVersion()

Test only method, no need for concurrency.

Specified by:

currVersion in interface VersionController

Returns:

the current version.