public class WeakReferenceMonitor extends Object
monitor(Object, ReleaseListener), with the given handle object usually being a holder that uses the target object underneath, and the release listener performing cleanup of the target object once the handle is not strongly referenced anymore.
When a given handle becomes weakly reachable, the specified listener will be called by a background thread. This thread will only be started lazily and will be stopped once no handles are registered for monitoring anymore, to be restarted if further handles are added.
Thanks to Tomasz Wysocki for the suggestion and the original implementation of this class!
|Modifier and Type||Class and Description|
Listener that is notified when the handle is being released.
|Constructor and Description|
|Modifier and Type||Method and Description|
Start to monitor given handle object for becoming weakly reachable.
public static void monitor(Object handle, WeakReferenceMonitor.ReleaseListener listener)
handle- the object that will be monitored
listener- the listener that will be called upon release of the handle