org.apache.bookkeeper.common.util

Interface Watcher<T>

public interface Watcher<T>

A class can implement the Watcher interface when it wants to be informed of one-time changes in watchable objects.

Method Summary

Modifier and Type	Method and Description
void	update(T value) This method is called whenever the watched object is changed.

Method Detail

update

void update(T value)

This method is called whenever the watched object is changed. An application calls an Watchable object's notifyWatchers method to have all the object's watchers notified of the change.

Parameters:

value - the updated value of a watchable