com.hotels.styx.admin

Class CachingSupplier<E>

java.lang.Object

com.hotels.styx.admin.CachingSupplier<E>

Type Parameters:

E - type of object supplied

All Implemented Interfaces:

Supplier<E>

public class CachingSupplier<E>
extends Object
implements Supplier<E>

Caches the output of another supplier until it expires. If the source supplier throws an exception, the exception will be logged and the previous output will remain cached after expiration.

Constructor Summary

Constructors

Constructor and Description
CachingSupplier(Supplier<? extends E> sourceSupplier, Duration updateInterval) Constructs an instance that wraps sourceSupplier.
CachingSupplier(Supplier<? extends E> sourceSupplier, Duration updateInterval, Clock clock) Constructs an instance that wraps sourceSupplier.

Method Summary

Modifier and Type	Method and Description
E	get()

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingSupplier

public CachingSupplier(Supplier<? extends E> sourceSupplier,
                       Duration updateInterval)

Constructs an instance that wraps sourceSupplier.

Parameters:

sourceSupplier - a supplier that will provide an up-to-date object each time it is called, that can be transformed into JSON

updateInterval - interval between calls to sourceSupplier

CachingSupplier

public CachingSupplier(Supplier<? extends E> sourceSupplier,
                       Duration updateInterval,
                       Clock clock)

Constructs an instance that wraps sourceSupplier. This constructor is intended for testing only.

Parameters:

sourceSupplier - a supplier that will provide an up-to-date object each time it is called, that can be transformed into JSON

updateInterval - interval between calls to sourceSupplier

clock - allows you to specify a different clock (for testing).

Method Detail

get

public E get()

Specified by:

get in interface Supplier<E>