org.apache.hadoop.hbase.quotas

类 RegionSizeStoreImpl

java.lang.Object

org.apache.hadoop.hbase.quotas.RegionSizeStoreImpl

所有已实现的接口:

Iterable<Map.Entry<RegionInfo,RegionSize>>, HeapSize, RegionSizeStore

@InterfaceAudience.Private
public class RegionSizeStoreImpl
extends Object
implements RegionSizeStore

A RegionSizeStore implementation backed by a ConcurrentHashMap. We expected similar amounts of reads and writes to the "store", so using a RWLock is not going to provide any exceptional gains.

构造器概要

构造器

构造器和说明
RegionSizeStoreImpl()

方法概要

限定符和类型	方法和说明
void	clear() Removes all entries from the store.
RegionSize	getRegionSize(RegionInfo regionInfo) Returns the size for the give region if one exists.
long	heapSize()
void	incrementRegionSize(RegionInfo regionInfo, long delta) Atomically alter the size of a region.
boolean	isEmpty() Returns if the store is empty.
Iterator<Map.Entry<RegionInfo,RegionSize>>	iterator()
void	put(RegionInfo regionInfo, long size) Atomically sets the given size for a region.
RegionSize	remove(RegionInfo regionInfo) Removes the mapping for the given key, returning the value if one exists in the store.
int	size() Returns the number of entries in the store.

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.lang.Iterable

forEach, spliterator

构造器详细资料

RegionSizeStoreImpl

public RegionSizeStoreImpl()

方法详细资料

iterator

public Iterator<Map.Entry<RegionInfo,RegionSize>> iterator()

指定者:

iterator 在接口中 Iterable<Map.Entry<RegionInfo,RegionSize>>

getRegionSize

public RegionSize getRegionSize(RegionInfo regionInfo)

从接口复制的说明: RegionSizeStore

Returns the size for the give region if one exists. If no size exists, null is returned.

指定者:

getRegionSize 在接口中 RegionSizeStore

参数:

regionInfo - The region whose size is being fetched.

返回:

The size in bytes of the region or null if no size is stored.

put

public void put(RegionInfo regionInfo,
                long size)

从接口复制的说明: RegionSizeStore

Atomically sets the given size for a region.

指定者:

put 在接口中 RegionSizeStore

参数:

regionInfo - An identifier for a region.

size - The size in bytes of the region.

incrementRegionSize

public void incrementRegionSize(RegionInfo regionInfo,
                                long delta)

从接口复制的说明: RegionSizeStore

Atomically alter the size of a region.

指定者:

incrementRegionSize 在接口中 RegionSizeStore

参数:

regionInfo - The region to update.

delta - The change in size for the region, positive or negative.

remove

public RegionSize remove(RegionInfo regionInfo)

从接口复制的说明: RegionSizeStore

Removes the mapping for the given key, returning the value if one exists in the store.

指定者:

remove 在接口中 RegionSizeStore

参数:

regionInfo - The key to remove from the store

返回:

The value removed from the store if one exists, otherwise null.

heapSize

public long heapSize()

指定者:

heapSize 在接口中 HeapSize

size

public int size()

从接口复制的说明: RegionSizeStore

Returns the number of entries in the store.

指定者:

size 在接口中 RegionSizeStore

返回:

The number of entries in the store.

isEmpty

public boolean isEmpty()

从接口复制的说明: RegionSizeStore

Returns if the store is empty.

指定者:

isEmpty 在接口中 RegionSizeStore

返回:

true if there are no entries in the store, otherwise false.

clear

public void clear()

从接口复制的说明: RegionSizeStore

Removes all entries from the store.

指定者:

clear 在接口中 RegionSizeStore