ConcurrentReferenceHashMap.ReferenceManager (Spring Framework 4.3.30.RELEASE API)

java.lang.Object
- org.springframework.util.ConcurrentReferenceHashMap.ReferenceManager

封闭类:
ConcurrentReferenceHashMap<K,V>
```
protected class ConcurrentReferenceHashMap.ReferenceManager
extends Object
```
Strategy class used to manage ConcurrentReferenceHashMap.References. This class can be overridden if alternative reference types need to be supported.

构造器概要
构造器
限定符构造器说明
protected ReferenceManager()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`ConcurrentReferenceHashMap.Reference<K,V>`	`createReference(ConcurrentReferenceHashMap.Entry<K,V> entry, int hash, ConcurrentReferenceHashMap.Reference<K,V> next)`	Factory method used to create a new `ConcurrentReferenceHashMap.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.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - ReferenceManager
```
protected ReferenceManager()
```
- 方法详细资料
  - createReference
```
public ConcurrentReferenceHashMap.Reference<K,V> createReference(ConcurrentReferenceHashMap.Entry<K,V> entry,
                                                                       int hash,
                                                                       ConcurrentReferenceHashMap.Reference<K,V> next)
```
    Factory method used to create a new ConcurrentReferenceHashMap.Reference.
    参数:
    entry - the entry contained in the reference
    hash - the hash
    next - the next reference in the chain, or null if none
    返回:
    a new ConcurrentReferenceHashMap.Reference
  - pollForPurge
```
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.
    返回:
    a reference to purge or null