Package oshi.util

Class Memoizer

java.lang.Object

oshi.util.Memoizer

@ThreadSafe
public final class Memoizer
extends Object

A memoized function stores the output corresponding to some set of specific inputs. Subsequent calls with remembered inputs return the remembered result rather than recalculating it.

Method Summary

Modifier and Type	Method	Description
static long	defaultExpiration()	Default exipiration of memoized values in nanoseconds, which will refresh after this time elapses.
static <T> Supplier<T>	memoize(Supplier<T> original)	Store a supplier in a delegate function to be computed only once.
static <T> Supplier<T>	memoize(Supplier<T> original, long ttlNanos)	Store a supplier in a delegate function to be computed once, and only again after time to live (ttl) has expired.

Methods inherited from class java.lang.Object

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

Method Details

defaultExpiration

public static long defaultExpiration()

Default exipiration of memoized values in nanoseconds, which will refresh after this time elapses. Update by setting GlobalConfig property oshi.util.memoizer.expiration to a value in milliseconds.

Returns:

The number of nanoseconds to keep memoized values before refreshing

memoize

public static <T> Supplier<T> memoize(Supplier<T> original,
 long ttlNanos)

Store a supplier in a delegate function to be computed once, and only again after time to live (ttl) has expired.

Type Parameters:

T - The type of object supplied

Parameters:

original - The Supplier to memoize

ttlNanos - Time in nanoseconds to retain calculation. If negative, retain indefinitely.

Returns:

A memoized version of the supplier

memoize

public static <T> Supplier<T> memoize(Supplier<T> original)

Store a supplier in a delegate function to be computed only once.

Type Parameters:

T - The type of object supplied

Parameters:

original - The Supplier to memoize

Returns:

A memoized version of the supplier