de.ruedigermoeller.heapoff

Class FSTOffHeapMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

de.ruedigermoeller.heapoff.FSTOffHeapMap<K,V>

Type Parameters:

K -

V -

All Implemented Interfaces:

Map<K,V>

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

UNRELEASED UNTESTED ! a simple Map implementation based on OffHeapBuffer. Access is not threadsafe and the offheapbuffer is not grown automatically when the limit is reached. Note that every put adds a new Entry to the OffHeapBuffer, so its wise to check using contains before putting an Object (except you explicitely want to overwrite the existing Object). The maps build an in Java-Heap hashmap Key=>OffHeapIndex. The values are then stored offheap. Access is single threaded only, you need to do your own synchronization in order to access this from multiple threads. All objects put need to implement Serializable

Nested Class Summary

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

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

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

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
FSTOffHeapMap(FSTByteBufferOffheap heap)
FSTOffHeapMap(int sizeMB)

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
FSTConfiguration	getConf()
FSTByteBufferOffheap	getHeap()
boolean	isEmpty()
V	put(K key, V value)
V	remove(Object key)
int	size()

Methods inherited from class java.util.AbstractMap

clone, equals, hashCode, keySet, putAll, 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

FSTOffHeapMap

public FSTOffHeapMap(FSTByteBufferOffheap heap)

FSTOffHeapMap

public FSTOffHeapMap(int sizeMB)
              throws IOException

Throws:

IOException

Method Detail

getConf

public FSTConfiguration getConf()

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class AbstractMap<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

Overrides:

isEmpty in class AbstractMap<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

Overrides:

containsKey in class AbstractMap<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

Overrides:

containsValue 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>

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class AbstractMap<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMap<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear 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>

getHeap

public FSTByteBufferOffheap getHeap()