Class ConcurrentReferenceHashMap.ReferenceManager

java.lang.Object

nl.basjes.parse.useragent.utils.springframework.util.ConcurrentReferenceHashMap.ReferenceManager

Enclosing class:

ConcurrentReferenceHashMap<K,V>

protected class ConcurrentReferenceHashMap.ReferenceManager
extends Object

Strategy class used to manage {link Reference References}. This class can be overridden if alternative reference types need to be supported.

Since:

3.2

Author:

Phillip Webb, Juergen Hoeller

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ReferenceManager()

Method Summary

Modifier and Type	Method	Description
ConcurrentReferenceHashMap.Reference<K,V>	createReference(ConcurrentReferenceHashMap.Entry<K,V> entry, int hash, ConcurrentReferenceHashMap.Reference<K,V> next)	Factory method used to create a new {link Reference}.
ConcurrentReferenceHashMap.Reference<K,V>	pollForPurge()	Return any reference that has been garbage collected and can be purged from the underlying structure or null if no references need purging.

Methods inherited from class Object

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

Constructor Details

ReferenceManager

protected ReferenceManager()

Method Details

createReference

public ConcurrentReferenceHashMap.Reference<K,V> createReference(ConcurrentReferenceHashMap.Entry<K,V> entry,
 int hash,
 @Nullable
 ConcurrentReferenceHashMap.Reference<K,V> next)

Factory method used to create a new {link Reference}.

Parameters:

entry - the entry contained in the reference

hash - the hash

next - the next reference in the chain, or null if none

Returns:

a new {link Reference}

pollForPurge

@Nullable
public ConcurrentReferenceHashMap.Reference<K,V> pollForPurge()

Return any reference that has been garbage collected and can be purged from the underlying structure or null if no references need purging. This method must be thread safe and ideally should not block when returning null. References should be returned once and only once.

Returns:

a reference to purge or null