org.jboss.util.collection

Class ConcurrentSet<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

org.jboss.util.collection.MapDelegateSet<E>

org.jboss.util.collection.ConcurrentSet<E>

Type Parameters:

E - the element type

All Implemented Interfaces:

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

public class ConcurrentSet<E>
extends MapDelegateSet<E>
implements Serializable

Concurrent Set based on top of ConcurrentHashMap. It's serializable if the elements are serializable.

Author:

Ales Justin

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ConcurrentSet() Constructs a new, empty set; the backing ConcurrentHashMap instance has default initial capacity (16) and load factor (0.75).
ConcurrentSet(Collection<? extends E> c) Constructs a new set containing the elements in the specified collection.
ConcurrentSet(int initialCapacity) Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and default load factor, which is 0.75.
ConcurrentSet(int initialCapacity, float loadFactor, int concurrencyLevel) Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and the specified load factor.

Method Summary

Methods inherited from class org.jboss.util.collection.MapDelegateSet

add, clear, contains, isEmpty, iterator, remove, size, toString

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toArray, toArray

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, toArray, toArray

Constructor Detail

ConcurrentSet

public ConcurrentSet()

Constructs a new, empty set; the backing ConcurrentHashMap instance has default initial capacity (16) and load factor (0.75).

ConcurrentSet

public ConcurrentSet(Collection<? extends E> c)

Constructs a new set containing the elements in the specified collection. The ConcurrentHashMap is created with default load factor (0.75) and an initial capacity sufficient to contain the elements in the specified collection.

Parameters:

c - the collection whose elements are to be placed into this set.

Throws:

NullPointerException - if the specified collection is null.

ConcurrentSet

public ConcurrentSet(int initialCapacity,
             float loadFactor,
             int concurrencyLevel)

Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and the specified load factor.

Parameters:

initialCapacity - 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.

concurrencyLevel - 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 less than zero, or if the load factor is nonpositive.

ConcurrentSet

public ConcurrentSet(int initialCapacity)

Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and default load factor, which is 0.75.

Parameters:

initialCapacity - the initial capacity of the hash table.

Throws:

IllegalArgumentException - if the initial capacity is less than zero.