Package gw.util.concurrent

Class Cache.ConcurrentLinkedHashMap.Node<K,V>

java.lang.Object

gw.util.concurrent.Cache.ConcurrentLinkedHashMap.Node<K,V>

All Implemented Interfaces:

Serializable

Enclosing class:

Cache.ConcurrentLinkedHashMap<K,V>

static final class Cache.ConcurrentLinkedHashMap.Node<K,V>
extends Object
implements Serializable

A node on the double-linked list. This list cross-cuts the data store.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Cache.ConcurrentLinkedHashMap.Node.State

Field Summary

Fields

Modifier and Type	Field	Description
private final K	key
private boolean	marked
private Cache.ConcurrentLinkedHashMap.Node<K,V>	next
private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Cache.ConcurrentLinkedHashMap.Node>	nextUpdater
private Cache.ConcurrentLinkedHashMap.Node<K,V>	prev
private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Cache.ConcurrentLinkedHashMap.Node>	prevUpdater
private static final long	serialVersionUID
private Cache.ConcurrentLinkedHashMap.Node.State	state
private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Cache.ConcurrentLinkedHashMap.Node.State>	stateUpdater
private V	value
private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Object>	valueUpdater

Constructor Summary

Constructors

Constructor	Description
Node()	Creates a sentinel node.
Node(K key, V value)	Creates a new, unlinked node.

Method Summary

Modifier and Type	Method	Description
boolean	casNext(Cache.ConcurrentLinkedHashMap.Node<K,V> expect, Cache.ConcurrentLinkedHashMap.Node<K,V> update)
boolean	casPrev(Cache.ConcurrentLinkedHashMap.Node<K,V> expect, Cache.ConcurrentLinkedHashMap.Node<K,V> update)
boolean	casState(Cache.ConcurrentLinkedHashMap.Node.State expect, Cache.ConcurrentLinkedHashMap.Node.State update)
boolean	casValue(V expect, V update)
boolean	equals(Object obj)	Only ensures that the values are equal, as the key may be null for look-ups.
V	getAndSetValue(V value)
K	getKey()
Cache.ConcurrentLinkedHashMap.Node<K,V>	getNext()
Cache.ConcurrentLinkedHashMap.Node<K,V>	getPrev()
Cache.ConcurrentLinkedHashMap.Node.State	getState()
V	getValue()
int	hashCode()
boolean	isMarked()
void	setMarked(boolean marked)
void	setNext(Cache.ConcurrentLinkedHashMap.Node<K,V> node)
void	setPrev(Cache.ConcurrentLinkedHashMap.Node<K,V> node)
void	setState(Cache.ConcurrentLinkedHashMap.Node.State state)
void	setValue(V value)
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

valueUpdater

private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Object> valueUpdater

stateUpdater

private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Cache.ConcurrentLinkedHashMap.Node.State> stateUpdater

prevUpdater

private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Cache.ConcurrentLinkedHashMap.Node> prevUpdater

nextUpdater

private static final AtomicReferenceFieldUpdater<Cache.ConcurrentLinkedHashMap.Node,Cache.ConcurrentLinkedHashMap.Node> nextUpdater

key

private final K key

value

private volatile V value

state

private volatile Cache.ConcurrentLinkedHashMap.Node.State state

marked

private volatile boolean marked

prev

private volatile Cache.ConcurrentLinkedHashMap.Node<K,V> prev

next

private volatile Cache.ConcurrentLinkedHashMap.Node<K,V> next

Constructor Details

Node

public Node()

Creates a sentinel node.

Node

public Node(K key,
 V value)

Creates a new, unlinked node.

Parameters:

key - the key

value - the value

Method Details

getKey

public K getKey()

getValue

public V getValue()

setValue

public void setValue(V value)

getAndSetValue

public V getAndSetValue(V value)

casValue

public boolean casValue(V expect,
 V update)

getPrev

public Cache.ConcurrentLinkedHashMap.Node<K,V> getPrev()

setPrev

public void setPrev(Cache.ConcurrentLinkedHashMap.Node<K,V> node)

casPrev

public boolean casPrev(Cache.ConcurrentLinkedHashMap.Node<K,V> expect,
 Cache.ConcurrentLinkedHashMap.Node<K,V> update)

getNext

public Cache.ConcurrentLinkedHashMap.Node<K,V> getNext()

setNext

public void setNext(Cache.ConcurrentLinkedHashMap.Node<K,V> node)

casNext

public boolean casNext(Cache.ConcurrentLinkedHashMap.Node<K,V> expect,
 Cache.ConcurrentLinkedHashMap.Node<K,V> update)

isMarked

public boolean isMarked()

setMarked

public void setMarked(boolean marked)

getState

public Cache.ConcurrentLinkedHashMap.Node.State getState()

setState

public void setState(Cache.ConcurrentLinkedHashMap.Node.State state)

casState

public boolean casState(Cache.ConcurrentLinkedHashMap.Node.State expect,
 Cache.ConcurrentLinkedHashMap.Node.State update)

equals

public boolean equals(Object obj)

Only ensures that the values are equal, as the key may be null for look-ups.

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object