org.apache.hadoop.hbase.wal

Class BoundedGroupingStrategy

java.lang.Object

org.apache.hadoop.hbase.wal.BoundedGroupingStrategy

All Implemented Interfaces:

RegionGroupingProvider.RegionGroupingStrategy

@InterfaceAudience.Private
public class BoundedGroupingStrategy
extends Object
implements RegionGroupingProvider.RegionGroupingStrategy

A WAL grouping strategy that limits the number of wal groups to "hbase.wal.regiongrouping.numgroups".

Field Summary

Fields

Modifier and Type	Field and Description
private AtomicInteger	counter
(package private) static int	DEFAULT_NUM_REGION_GROUPS
private ConcurrentHashMap<String,String>	groupNameCache
private String[]	groupNames
(package private) static String	NUM_REGION_GROUPS

Fields inherited from interface org.apache.hadoop.hbase.wal.RegionGroupingProvider.RegionGroupingStrategy

GROUP_NAME_DELIMITER

Constructor Summary

Constructors

Constructor and Description
BoundedGroupingStrategy()

Method Summary

Modifier and Type	Method and Description
private int	getAndIncrAtomicInteger(AtomicInteger atomicInt, int reset)
String	group(byte[] identifier, byte[] namespace) Given an identifier and a namespace, pick a group.
void	init(org.apache.hadoop.conf.Configuration config, String providerId)

Methods inherited from class java.lang.Object

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

Field Detail

NUM_REGION_GROUPS

static final String NUM_REGION_GROUPS

See Also:

Constant Field Values

DEFAULT_NUM_REGION_GROUPS

static final int DEFAULT_NUM_REGION_GROUPS

See Also:

Constant Field Values

groupNameCache

private ConcurrentHashMap<String,String> groupNameCache

counter

private AtomicInteger counter

groupNames

private String[] groupNames

Constructor Detail

BoundedGroupingStrategy

public BoundedGroupingStrategy()

Method Detail

group

public String group(byte[] identifier,
                    byte[] namespace)

Description copied from interface: RegionGroupingProvider.RegionGroupingStrategy

Given an identifier and a namespace, pick a group.

Specified by:

group in interface RegionGroupingProvider.RegionGroupingStrategy

getAndIncrAtomicInteger

private int getAndIncrAtomicInteger(AtomicInteger atomicInt,
                                    int reset)

init

public void init(org.apache.hadoop.conf.Configuration config,
                 String providerId)

Specified by:

init in interface RegionGroupingProvider.RegionGroupingStrategy