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:

java.util.Map<K,V>

public class ShardedMap<K,V>
extends java.util.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 and 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

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

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

java.util.Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
ShardedMap()
ShardedMap(DataType keyType)

Method Summary

Modifier and Type	Method and Description
void	addMap(java.util.Map<K,V> map, K min, K max) Add the given shard.
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
V	get(java.lang.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 Detail

ShardedMap

public ShardedMap()

ShardedMap

public ShardedMap(DataType keyType)

Method Detail

addMap

public void addMap(java.util.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 java.util.Map<K,V>

Overrides:

size in class java.util.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 java.util.Map<K,V>

Overrides:

put in class java.util.AbstractMap<K,V>

get

public V get(java.lang.Object key)

Specified by:

get in interface java.util.Map<K,V>

Overrides:

get in class java.util.AbstractMap<K,V>

entrySet

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

Specified by:

entrySet in interface java.util.Map<K,V>

Specified by:

entrySet in class java.util.AbstractMap<K,V>