de.team33.patterns.expiry.tethys

Class Recent<T>

java.lang.Object

de.team33.patterns.expiry.tethys.Recent<T>

Type Parameters:

T - The type of instances to handle.

All Implemented Interfaces:

Supplier<T>

public class Recent<T>
extends Object
implements Supplier<T>

Defines a container type for handling instances, which in principle can be defined globally and reused over and over again, but have to be updated after a certain time.

Problem to solve:

There are objects that, due to their technical properties, are predestined to be initialized and made available once throughout the application. In particular, they are state-free but relatively "expensive" to initialize. Due to their semantics, however, they have to be renewed from time to time. An example of such an object could be an authentication token.

This class serves to handle such objects and in particular their updating.

Constructor Summary

Constructors

Constructor and Description
Recent(Supplier<? extends T> newSubject, long maxIdle, long maxLiving) Initializes a new instance of this container type given a Supplier for the type to be handled and an intended lifetime of such instances.

Method Summary

Modifier and Type	Method and Description
T	get()

Methods inherited from class java.lang.Object

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

Constructor Detail

Recent

public Recent(Supplier<? extends T> newSubject,
              long maxIdle,
              long maxLiving)

Initializes a new instance of this container type given a Supplier for the type to be handled and an intended lifetime of such instances.

CAUTION: The given lifetime should be significantly smaller than the actually expected life span of an instance to be handled, otherwise there may not be enough time to use a provided instance successfully!

Parameters:

newSubject - the Supplier for the instances to handle

maxIdle - the maximum idle time in milliseconds

maxLiving - the maximum lifetime in milliseconds

Method Detail

get

public final T get()

Specified by:

get in interface Supplier<T>