WeakReferenceMonitor.ReleaseListener (Spring Framework 4.3.30.RELEASE API)

封闭类:
WeakReferenceMonitor
```
public static interface WeakReferenceMonitor.ReleaseListener
```
Listener that is notified when the handle is being released. To be implemented by users of this reference monitor.

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`void`	`released()`	This callback method is invoked once the associated handle has been released, i.e. once there are no monitored strong references to the handle anymore.

- 方法详细资料
  - released
```
void released()
```
    This callback method is invoked once the associated handle has been released, i.e. once there are no monitored strong references to the handle anymore.