Package org.h2.dev.cluster

Class ShardedMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.h2.dev.cluster.ShardedMap<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Map<K,V>

public class ShardedMap<K,V>
extends AbstractMap<K,V>

A sharded map. It is typically split into multiple sub-maps that don't have overlapping keys.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ShardedMap.CountedMap<K,V>	A map that can efficiently return the index of a key, and the key at a given index.
static interface	ShardedMap.LargeMap	A large map.

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
ShardedMap()
ShardedMap(DataType keyType)

Method Summary

Modifier and Type	Method	Description
void	addMap(Map<K,V> map, K min, K max)	Add the given shard.
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
V	put(K key, V value)
int	size()
long	sizeAsLong()	The size of the map.

Methods inherited from class java.util.AbstractMap

clear, clone, containsKey, containsValue, equals, hashCode, isEmpty, keySet, putAll, remove, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Details

ShardedMap

public ShardedMap()

ShardedMap

public ShardedMap(DataType keyType)

Method Details

addMap

public void addMap(Map<K,V> map,
 K min,
 K max)

Add the given shard.

Parameters:

map - the map

min - the lowest key, or null if no limit

max - the highest key, or null if no limit

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class AbstractMap<K,V>

sizeAsLong

public long sizeAsLong()

The size of the map.

Returns:

the size

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class AbstractMap<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class AbstractMap<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>