RandomizedHashOrderMixer

java.lang.Object

com.carrotsearch.hppc.RandomizedHashOrderMixer

All Implemented Interfaces:: HashOrderMixingStrategy, Cloneable

public final class RandomizedHashOrderMixer extends Object implements HashOrderMixingStrategy

Randomized hash order. Does not guarantee deterministic hash ordering between runs. In fact, it tries hard to avoid such guarantee.

Field Summary

Fields

Modifier and Type

Field

Description

static final RandomizedHashOrderMixer

INSTANCE

protected final AtomicLong

seedMixer
Constructor Summary

Constructors

Constructor

Description

RandomizedHashOrderMixer()

RandomizedHashOrderMixer(long seed)
Method Summary

Modifier and Type

Method

Description

HashOrderMixingStrategy

clone()

int

newKeyMixer(int newContainerBufferSize)

A new key mixer value.

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- INSTANCE
  
  public static final RandomizedHashOrderMixer INSTANCE
- seedMixer
  
  protected final AtomicLong seedMixer
Constructor Details
- RandomizedHashOrderMixer
  
  public RandomizedHashOrderMixer()
- RandomizedHashOrderMixer
  
  public RandomizedHashOrderMixer(long seed)
Method Details
- newKeyMixer
  
  public int newKeyMixer(int newContainerBufferSize)
  
  Description copied from interface: HashOrderMixingStrategy
  
  A new key mixer value. The value can be derived from the new buffer size of the container, but preferably should be random and unique.
  
  Specified by:
  
  newKeyMixer in interface HashOrderMixingStrategy
  
  Parameters:
  
  newContainerBufferSize -
- clone
  
  public HashOrderMixingStrategy clone()
  
  Specified by:
  
  clone in interface HashOrderMixingStrategy
  
  Overrides:
  
  clone in class Object
  
  Returns:
  
  Return a clone of this strategy. This should use a different mixing because cloned containers should have a different hash ordering.