org.glassfish.grizzly.utils

Class DataStructures

java.lang.Object

org.glassfish.grizzly.utils.DataStructures

public class DataStructures
extends Object

Constructor Summary

Constructors

Constructor and Description
DataStructures()

Method Summary

Methods

Modifier and Type	Method and Description
static <K,V> ConcurrentMap<K,V>	getConcurrentMap() Creates a new, empty map with a default initial capacity (16), load factor (0.75) and concurrencyLevel (16).
static <K,V> ConcurrentMap<K,V>	getConcurrentMap(int initialCapacity) Creates a new, empty map with an initial table size accommodating the specified number of elements without the need to dynamically resize.
static <K,V> ConcurrentMap<K,V>	getConcurrentMap(int initialCapacity, float loadFactor, int concurrencyLevel) Creates a new, empty map with an initial table size based on the given number of elements (initialCapacity), table density (loadFactor), and number of concurrently updating threads (concurrencyLevel).
static <K,V> ConcurrentMap<K,V>	getConcurrentMap(Map<? extends K,? extends V> map) Creates a new map with the same mappings as the given map.
static <T> BlockingQueue<T>	getLTQInstance()
static <T> BlockingQueue<T>	getLTQInstance(Class<T> t)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataStructures

public DataStructures()

Method Detail

getLTQInstance

public static <T> BlockingQueue<T> getLTQInstance()

getLTQInstance

public static <T> BlockingQueue<T> getLTQInstance(Class<T> t)

getConcurrentMap

public static <K,V> ConcurrentMap<K,V> getConcurrentMap()

Creates a new, empty map with a default initial capacity (16), load factor (0.75) and concurrencyLevel (16).

Since:

2.3.5

getConcurrentMap

public static <K,V> ConcurrentMap<K,V> getConcurrentMap(Map<? extends K,? extends V> map)

Creates a new map with the same mappings as the given map.

Parameters:

m - the map

Since:

2.3.5

getConcurrentMap

public static <K,V> ConcurrentMap<K,V> getConcurrentMap(int initialCapacity)

Creates a new, empty map with an initial table size accommodating the specified number of elements without the need to dynamically resize.

Parameters:

initialCapacity - The implementation performs internal sizing to accommodate this many elements.

Throws:

IllegalArgumentException - if the initial capacity of elements is negative

Since:

2.3.5

getConcurrentMap

public static <K,V> ConcurrentMap<K,V> getConcurrentMap(int initialCapacity,
                                        float loadFactor,
                                        int concurrencyLevel)

Creates a new, empty map with an initial table size based on the given number of elements (initialCapacity), table density (loadFactor), and number of concurrently updating threads (concurrencyLevel).

Parameters:

initialCapacity - the initial capacity. The implementation performs internal sizing to accommodate this many elements, given the specified load factor.

loadFactor - the load factor (table density) for establishing the initial table size

concurrencyLevel - the estimated number of concurrently updating threads. The implementation may use this value as a sizing hint.

Throws:

IllegalArgumentException - if the initial capacity is negative or the load factor or concurrencyLevel are nonpositive

Since:

2.3.5