org.apache.ode.utils

Interface WatchDog.Observer<A>

All Known Implementing Classes:

WatchDog.DefaultObserver

Enclosing class:

WatchDog<T,C extends WatchDog.Observer>

public static interface WatchDog.Observer<A>

Method Summary

Modifier and Type	Method and Description
A	get()
java.util.concurrent.locks.Lock	getLock()
void	init() Called by WatchDog.check() if the underlying object is not initialized and the WatchDog.Mutable.exists() resource does not exist}.
boolean	isInitialized()
void	onDelete() Called only if the resource previously existed and now does not exist.
void	onUpdate() Called only if the resource previously existed but the WatchDog.Mutable.lastModified() timestamp has changed (greater than the previous value).
void	reset()

Method Detail

isInitialized

boolean isInitialized()

init

void init()

Called by WatchDog.check() if the underlying object is not initialized and the WatchDog.Mutable.exists() resource does not exist}.
This method might called to reset the underlying object.

Throws:

java.lang.Exception

reset

void reset()

onDelete

void onDelete()

Called only if the resource previously existed and now does not exist.
The default implementation invokes init() .

Throws:

java.lang.Exception

onUpdate

void onUpdate()

Called only if the resource previously existed but the WatchDog.Mutable.lastModified() timestamp has changed (greater than the previous value).
The default implementation invokes init() .

Throws:

java.lang.Exception

getLock

java.util.concurrent.locks.Lock getLock()

get

A get()