Package gw.util.concurrent

Class LockingLazyVar<T>

java.lang.Object

gw.util.concurrent.LockingLazyVar<T>

public abstract class LockingLazyVar<T>
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LockingLazyVar.LazyVarInit<Q>	A simple init interface to make LockingLazyVar's easier to construct from gosu.

Field Summary

Fields

Modifier and Type	Field	Description
private final Lock	_lock
private T	_val
protected static final Object	NULL

Constructor Summary

Constructors

Modifier	Constructor	Description
	LockingLazyVar()	Constructs a LockingLazyVar that will use itself as the object of synchronization.
protected	LockingLazyVar(Lock lock)	Constructs a LockingLazyVar that will synchronize on the given object.

Method Summary

Modifier and Type	Method	Description
final T	clear()	Clears the variable, forcing the next call to get() to re-calculate the value.
final void	clearNoLock()
final T	get()
protected abstract T	init()
protected void	initDirectly(T val)
boolean	isLoaded()
static <Q> LockingLazyVar<Q>	make(LockingLazyVar.LazyVarInit<Q> init)	Creates a new LockingLazyVar based on the type of the LazyVarInit passed in.
static <Q> LockingLazyVar<Q>	make(Lock lock, LockingLazyVar.LazyVarInit<Q> init)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

NULL

protected static final Object NULL

_val

private volatile T _val

_lock

private final Lock _lock

Constructor Details

LockingLazyVar

public LockingLazyVar()

Constructs a LockingLazyVar that will use itself as the object of synchronization.

LockingLazyVar

protected LockingLazyVar(Lock lock)

Constructs a LockingLazyVar that will synchronize on the given object.

Method Details

get

public final T get()

Returns:

the value of this lazy var, created if necessary

init

protected abstract T init()

clear

public final T clear()

Clears the variable, forcing the next call to get() to re-calculate the value.

clearNoLock

public final void clearNoLock()

initDirectly

protected void initDirectly(T val)

isLoaded

public boolean isLoaded()

make

public static <Q> LockingLazyVar<Q> make(LockingLazyVar.LazyVarInit<Q> init)

Creates a new LockingLazyVar based on the type of the LazyVarInit passed in. This method is intended to be called with blocks from Gosu.

make

public static <Q> LockingLazyVar<Q> make(Lock lock,
 LockingLazyVar.LazyVarInit<Q> init)