程序包 org.apache.iotdb.db.engine.version

类 SimpleFileVersionController

java.lang.Object

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

所有已实现的接口:

VersionController

public class SimpleFileVersionController
extends java.lang.Object
implements VersionController

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

字段概要

字段

修饰符和类型	字段	说明
static java.lang.String	FILE_PREFIX
static java.lang.String	UPGRADE_DIR

构造器概要

构造器

构造器	说明
SimpleFileVersionController(java.lang.String directoryPath)	only used for upgrading
SimpleFileVersionController(java.lang.String directoryPath, long timePartitionId)

方法概要

修饰符和类型	方法	说明
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)

从类继承的方法 java.lang.Object

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

字段详细资料

FILE_PREFIX

public static final java.lang.String FILE_PREFIX

另请参阅:

常量字段值

UPGRADE_DIR

public static final java.lang.String UPGRADE_DIR

另请参阅:

常量字段值

构造器详细资料

SimpleFileVersionController

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

抛出:

java.io.IOException

SimpleFileVersionController

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

only used for upgrading

抛出:

java.io.IOException

方法详细资料

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()

从接口复制的说明: VersionController

Get the next version number.

指定者:

nextVersion 在接口中 VersionController

返回:

the next version number.

currVersion

public long currVersion()

Test only method, no need for concurrency.

指定者:

currVersion 在接口中 VersionController

返回:

the current version.