org.infinispan.commons.util.concurrent

Class ConcurrentHashSet<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

org.infinispan.commons.util.concurrent.ConcurrentHashSet<E>

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.Set<E>

public class ConcurrentHashSet<E>
extends java.util.AbstractSet<E>
implements java.io.Serializable

A simple Set implementation backed by a ConcurrentHashMap to deal with the fact that the JDK does not have a proper concurrent Set implementation that uses efficient lock striping.

Note that values are stored as keys in the underlying Map, with a static dummy object as value.

Since:

4.0

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ConcurrentMap<E,java.lang.Object>	map

Constructor Summary

Constructors

Constructor and Description
ConcurrentHashSet()
ConcurrentHashSet(int concurrencyLevel)
ConcurrentHashSet(int initSize, float loadFactor, int concurrencyLevel) Params passed in to the underlying CHM.

Method Summary

Modifier and Type	Method and Description
boolean	add(E o)
boolean	addAll(java.util.Collection<? extends E> c)
void	clear()
boolean	contains(java.lang.Object o)
boolean	containsAll(java.util.Collection<?> c)
boolean	isEmpty()
java.util.Iterator<E>	iterator()
boolean	remove(java.lang.Object o)
boolean	removeAll(java.util.Collection<?> c)
boolean	retainAll(java.util.Collection<?> c)
int	size()
java.lang.Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

spliterator

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

map

protected final java.util.concurrent.ConcurrentMap<E,java.lang.Object> map

Constructor Detail

ConcurrentHashSet

public ConcurrentHashSet()

ConcurrentHashSet

public ConcurrentHashSet(int concurrencyLevel)

Parameters:

concurrencyLevel - passed in to the underlying CHM. See ConcurrentHashMap.ConcurrentHashMap(int, float, int) javadocs for details.

ConcurrentHashSet

public ConcurrentHashSet(int initSize,
                         float loadFactor,
                         int concurrencyLevel)

Params passed in to the underlying CHM. See ConcurrentHashMap.ConcurrentHashMap(int, float, int) javadocs for details.

Method Detail

size

public int size()

Specified by:

size in interface java.util.Collection<E>

Specified by:

size in interface java.util.Set<E>

Specified by:

size in class java.util.AbstractCollection<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection<E>

Specified by:

isEmpty in interface java.util.Set<E>

Overrides:

isEmpty in class java.util.AbstractCollection<E>

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<E>

Specified by:

contains in interface java.util.Set<E>

Overrides:

contains in class java.util.AbstractCollection<E>

iterator

public java.util.Iterator<E> iterator()

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

Specified by:

iterator in interface java.util.Set<E>

Specified by:

iterator in class java.util.AbstractCollection<E>

toArray

public java.lang.Object[] toArray()

Specified by:

toArray in interface java.util.Collection<E>

Specified by:

toArray in interface java.util.Set<E>

Overrides:

toArray in class java.util.AbstractCollection<E>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface java.util.Collection<E>

Specified by:

toArray in interface java.util.Set<E>

Overrides:

toArray in class java.util.AbstractCollection<E>

add

public boolean add(E o)

Specified by:

add in interface java.util.Collection<E>

Specified by:

add in interface java.util.Set<E>

Overrides:

add in class java.util.AbstractCollection<E>

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<E>

Specified by:

remove in interface java.util.Set<E>

Overrides:

remove in class java.util.AbstractCollection<E>

containsAll

public boolean containsAll(java.util.Collection<?> c)

Specified by:

containsAll in interface java.util.Collection<E>

Specified by:

containsAll in interface java.util.Set<E>

Overrides:

containsAll in class java.util.AbstractCollection<E>

addAll

public boolean addAll(java.util.Collection<? extends E> c)

Specified by:

addAll in interface java.util.Collection<E>

Specified by:

addAll in interface java.util.Set<E>

Overrides:

addAll in class java.util.AbstractCollection<E>

retainAll

public boolean retainAll(java.util.Collection<?> c)

Specified by:

retainAll in interface java.util.Collection<E>

Specified by:

retainAll in interface java.util.Set<E>

Overrides:

retainAll in class java.util.AbstractCollection<E>

removeAll

public boolean removeAll(java.util.Collection<?> c)

Specified by:

removeAll in interface java.util.Collection<E>

Specified by:

removeAll in interface java.util.Set<E>

Overrides:

removeAll in class java.util.AbstractSet<E>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<E>

Specified by:

clear in interface java.util.Set<E>

Overrides:

clear in class java.util.AbstractCollection<E>