Package org.aksw.commons.util.ref

Class LazyRef<T>

java.lang.Object

org.aksw.commons.util.ref.LazyRef<T>

Type Parameters:

T -

All Implemented Interfaces:

Serializable, Supplier<Ref<T>>

public class LazyRef<T>
extends Object
implements Supplier<Ref<T>>, Serializable

A supplier for a ref backed by a root ref. Calling .get() creates the root ref lazily if it does not yet exist. Once the user ref is released, the release of the root ref is only scheduled. Another request to .get() cancels a pending release.

Author:

raven

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Ref<T>	backendRef
protected Supplier<? extends Ref<T>>	backendRefSupplier
protected long	closeDelayInMs
protected String	label
protected Ref<T>	rootRef
protected Timer	timer

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	LazyRef()
	LazyRef(String label, Supplier<? extends Ref<T>> backendRefSupplier, long closeDelayInMs)

Method Summary

Modifier and Type	Method	Description
protected void	actualClose()
static <T> LazyRef<T>	create(String label, Supplier<? extends Ref<T>> rootRefFactory, long delayInMs)
Ref<T>	get()

Methods inherited from class java.lang.Object

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

Field Details

label

protected String label

backendRefSupplier

protected Supplier<? extends Ref<T>> backendRefSupplier

closeDelayInMs

protected long closeDelayInMs

backendRef

protected transient volatile Ref<T> backendRef

rootRef

protected transient volatile Ref<T> rootRef

timer

protected transient volatile Timer timer

Constructor Details

LazyRef

protected LazyRef()

LazyRef

public LazyRef(String label,
 Supplier<? extends Ref<T>> backendRefSupplier,
 long closeDelayInMs)

Method Details

create

public static <T> LazyRef<T> create(String label,
 Supplier<? extends Ref<T>> rootRefFactory,
 long delayInMs)

get

public Ref<T> get()

Specified by:

get in interface Supplier<T>

actualClose

protected void actualClose()