fiftyone.mobile.detection
Class Cache<K,V>

java.lang.Object
  fiftyone.mobile.detection.Cache<K,V>

 class Cache<K,V>
extends Object

Used to speed the retrieval of detection results over duplicate requests.

Field Summary

private ConcurrentHashMap<K,V>	active The active cache.
private ConcurrentHashMap<K,V>	background The background cache.
private long	nextCacheService The next time the caches should be switched.
private int	serviceIntervalMS The time between cache services.

Constructor Summary

Cache(int serviceInterval)
Constructs a new instance of the cache.

Method Summary

private void	service() Service the cache by switching the lists if the next service time has passed.
(package private) void	setActive(K key, V result)
(package private) void	setBackground(K key, V result)
(package private) V	tryGetValue(K key) Attempts to get the value with the given, or null if no key is found.

Methods inherited from class java.lang.Object

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

Field Detail

nextCacheService

private long nextCacheService

The next time the caches should be switched.

serviceIntervalMS

private int serviceIntervalMS

The time between cache services.

active

private ConcurrentHashMap<K,V> active

The active cache.

background

private ConcurrentHashMap<K,V> background

The background cache.

Constructor Detail

Cache

public Cache(int serviceInterval)

Constructs a new instance of the cache.

Parameters:

serviceInterval - number of seconds between switching the cache.

Method Detail

service

private void service()

Service the cache by switching the lists if the next service time has passed.

tryGetValue

V tryGetValue(K key)

Attempts to get the value with the given, or null if no key is found.

setActive

void setActive(K key,
               V result)

setBackground

void setBackground(K key,
                   V result)