org.apache.ratis.util

Class MemoizedSupplier<T>

java.lang.Object

org.apache.ratis.util.MemoizedSupplier<T>

Type Parameters:

T - The supplier result type.

All Implemented Interfaces:

Supplier<T>

public final class MemoizedSupplier<T>
extends Object
implements Supplier<T>

A memoized supplier is a Supplier which gets a value by invoking its initializer once and then keeps returning the same value as its supplied results. This class is thread safe.

Method Summary

Modifier and Type	Method and Description
T	get()
boolean	isInitialized()
static <T> MemoizedSupplier<T>	valueOf(Supplier<T> supplier)

Methods inherited from class java.lang.Object

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

Method Detail

valueOf

public static <T> MemoizedSupplier<T> valueOf(Supplier<T> supplier)

Parameters:

supplier - to supply at most one non-null value.

Returns:

a MemoizedSupplier with the given supplier.

get

public T get()

Specified by:

get in interface Supplier<T>

Returns:

the lazily initialized object.

isInitialized

public boolean isInitialized()

Returns:

is the object initialized?