com.tangosol.util
Class SegmentedHashSet

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractSet
          com.tangosol.util.MapSet
              com.tangosol.util.SegmentedHashSet

All Implemented Interfaces:

ExternalizableLite, java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable, java.util.Collection, java.util.Set

public class SegmentedHashSet
extends MapSet

An implementation of java.util.Set that is optimized for heavy concurrent use.

Since:

Coherence 3.5.1

Author:

jh 2009.08.28

Field Summary

Fields inherited from class com.tangosol.util.MapSet

m_map, NO_VALUE

Constructor Summary

SegmentedHashSet()
Construct a thread-safe hash set using the default settings.

SegmentedHashSet(int cInitialBuckets, float flLoadFactor, float flGrowthRate)
Construct a thread-safe hash set using the specified settings.

Method Summary

protected java.util.Map

instantiateMap() Factory pattern: Provide an underlying Map for this Set implementation to store its contents in.

Methods inherited from class com.tangosol.util.MapSet

add, addAll, clear, clone, contains, containsAll, getMap, iterator, readExternal, readExternal, remove, removeAll, retainAll, size, toArray, toArray, writeExternal, writeExternal

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

isEmpty, toString

Methods inherited from interface java.util.Set

isEmpty

Constructor Detail

SegmentedHashSet

public SegmentedHashSet()

Construct a thread-safe hash set using the default settings.

SegmentedHashSet

public SegmentedHashSet(int cInitialBuckets,
                        float flLoadFactor,
                        float flGrowthRate)

Construct a thread-safe hash set using the specified settings.

Parameters:

cInitialBuckets - the initial number of hash buckets, 0 < n

flLoadFactor - the acceptable load factor before resizing occurs, 0 < n, such that a load factor of 1.0 causes resizing when the number of entries exceeds the number of buckets

flGrowthRate - the rate of bucket growth when a resize occurs, 0 < n, such that a growth rate of 1.0 will double the number of buckets: bucketcount = bucketcount * (1 + growthrate)

Method Detail

instantiateMap

protected java.util.Map instantiateMap()

Factory pattern: Provide an underlying Map for this Set implementation to store its contents in.

Overrides:

instantiateMap in class MapSet

Returns:

a new Map instance