Package com.palantir.util

Class CachedComposedSupplier<T,R>

java.lang.Object

com.palantir.util.CachedComposedSupplier<T,R>

All Implemented Interfaces:

Supplier<R>

public class CachedComposedSupplier<T,R>
extends Object
implements Supplier<R>

A version of composed supplier that caches the result of applying the function to the value supplied by the underlying supplier of VersionedType. The result is recomputed if and only if the returned version increased since last call to get(), or a specified amount of time has elapsed since the returned version has changed. Intended to be used when applying the function is expensive and the versioned type is expected to be updated less frequently than calls to get().

Constructor Summary

Constructors

Constructor	Description
CachedComposedSupplier(Function<T,R> function, Supplier<VersionedType<T>> supplier)
CachedComposedSupplier(Function<T,R> function, Supplier<VersionedType<T>> supplier, long maxTimeBetweenRecomputes, Clock clock)

Method Summary

Modifier and Type	Method	Description
R	get()

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedComposedSupplier

public CachedComposedSupplier(Function<T,R> function,
                              Supplier<VersionedType<T>> supplier)

CachedComposedSupplier

public CachedComposedSupplier(Function<T,R> function,
                              Supplier<VersionedType<T>> supplier,
                              long maxTimeBetweenRecomputes,
                              Clock clock)

Method Detail

get

public R get()

Specified by:

get in interface Supplier<T>