com.gigaspaces.internal.utils.collections.economy

Class EconomyConcurrentHashMap.HashEntry<K,V>

java.lang.Object

com.gigaspaces.internal.utils.collections.economy.EconomyConcurrentHashMap.HashEntry<K,V>

All Implemented Interfaces:

IHashEntry<K,V>

Direct Known Subclasses:

EconomyConcurrentHashMap.PinnedHashEntry

Enclosing class:

EconomyConcurrentHashMap<K,V>

public static class EconomyConcurrentHashMap.HashEntry<K,V>
extends Object
implements IHashEntry<K,V>

ConcurrentHashMap list entry. Note that this is never exported out as a user-visible Map.Entry. Because the value field is volatile, not final, it is legal wrt the Java Memory Model for an unsynchronized reader to see null instead of initial value when read via a data race. Although a reordering leading to this is not likely to ever actually occur, the Segment.readValueUnderLock method is used as a backup in case a null (pre-initialized) value is ever seen in an unsynchronized access method.

Constructor Summary

Constructors

Constructor and Description
HashEntry(K key, int hash, IHashEntry<K,V> next, V value)

Method Summary

Modifier and Type	Method and Description
int	getHashCode(int id)
K	getKey(int id)
V	getValue(int id)
boolean	isNativeHashEntry()
boolean	isPinnedHashEntry()

Methods inherited from class java.lang.Object

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

Constructor Detail

HashEntry

public HashEntry(K key,
                 int hash,
                 IHashEntry<K,V> next,
                 V value)

Method Detail

getHashCode

public int getHashCode(int id)

Specified by:

getHashCode in interface IHashEntry<K,V>

getKey

public K getKey(int id)

Specified by:

getKey in interface IHashEntry<K,V>

getValue

public V getValue(int id)

Specified by:

getValue in interface IHashEntry<K,V>

isNativeHashEntry

public boolean isNativeHashEntry()

Specified by:

isNativeHashEntry in interface IHashEntry<K,V>

Returns:

true if this is a native hashmap entry

isPinnedHashEntry

public boolean isPinnedHashEntry()