org.apache.ignite.internal.util

Class GridConcurrentHashSet<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

org.apache.ignite.internal.util.GridSerializableSet<E>

org.apache.ignite.internal.util.GridSetWrapper<E>

org.apache.ignite.internal.util.GridConcurrentHashSet<E>

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, Set<E>

public class GridConcurrentHashSet<E>
extends GridSetWrapper<E>

Concurrent set implementation.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.ignite.internal.util.GridSetWrapper

map, VAL

Constructor Summary

Constructors

Constructor and Description
GridConcurrentHashSet() Creates a new, empty set with a default initial capacity, load factor, and concurrencyLevel.
GridConcurrentHashSet(Collection<E> c) Creates a new set with the same elements as the given collection.
GridConcurrentHashSet(int initCap) Creates a new, empty set with the specified initial capacity, and with default load factor and concurrencyLevel.
GridConcurrentHashSet(int initCap, float loadFactor, int conLevel) Creates a new, empty set with the specified initial capacity, load factor, and concurrency level.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(E e) Note that unlike regular add operation on a set, this method will only add the passed in element if it's not already present in set.
E	addx(E e) Note that unlike regular add operation on a set, this method will only add the passed in element if it's not already present in set.
String	toString()

Methods inherited from class org.apache.ignite.internal.util.GridSetWrapper

clear, contains, defaultValue, isEmpty, iterator, map, remove, size, toArray, toArray

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

addAll, containsAll, retainAll

Constructor Detail

GridConcurrentHashSet

public GridConcurrentHashSet()

Creates a new, empty set with a default initial capacity, load factor, and concurrencyLevel.

GridConcurrentHashSet

public GridConcurrentHashSet(int initCap)

Creates a new, empty set with the specified initial capacity, and with default load factor and concurrencyLevel.

Parameters:

initCap - The initial capacity. The implementation performs internal sizing to accommodate this many elements.

Throws:

IllegalArgumentException - if the initial capacity of elements is negative.

GridConcurrentHashSet

public GridConcurrentHashSet(int initCap,
                     float loadFactor,
                     int conLevel)

Creates a new, empty set with the specified initial capacity, load factor, and concurrency level.

Parameters:

initCap - The initial capacity. The implementation performs internal sizing to accommodate this many elements.

loadFactor - The load factor threshold, used to control resizing. Resizing may be performed when the average number of elements per bin exceeds this threshold.

conLevel - The estimated number of concurrently updating threads. The implementation performs internal sizing to try to accommodate this many threads.

Throws:

IllegalArgumentException - if the initial capacity is negative or the load factor or concurrency level are non-positive.

GridConcurrentHashSet

public GridConcurrentHashSet(Collection<E> c)

Creates a new set with the same elements as the given collection. The collection is created with a capacity of twice the number of mappings in the given map or 11 (whichever is greater), and a default load factor and concurrencyLevel.

Parameters:

c - Collection to add.

Method Detail

add

public boolean add(E e)

Note that unlike regular add operation on a set, this method will only add the passed in element if it's not already present in set.

Specified by:

add in interface Collection<E>

Specified by:

add in interface Set<E>

Overrides:

add in class GridSetWrapper<E>

Parameters:

e - Element to add.

Returns:

True if element was added.

addx

@Nullable
public E addx(E e)

Note that unlike regular add operation on a set, this method will only add the passed in element if it's not already present in set.

Parameters:

e - Element to add.

Returns:

Value previously present in set or null if set didn't have this value.

toString

public String toString()

Overrides:

toString in class GridSetWrapper<E>