Package net.solarnetwork.central.support

Class BasicSharedValueCache<K,V,S>

java.lang.Object

net.solarnetwork.central.support.BasicSharedValueCache<K,V,S>

All Implemented Interfaces:

SharedValueCache<K,V,S>

public class BasicSharedValueCache<K,V,S>
extends Object
implements SharedValueCache<K,V,S>

Basic implementation of SharedValueCache using ConcurrentMap objects for storage.

Constructor Summary

Constructors

Constructor	Description
BasicSharedValueCache()	Constructor.
BasicSharedValueCache(ConcurrentMap<K,net.solarnetwork.util.CachedResult<V>> cache, ConcurrentMap<S,V> sharedCache)	Constructor.

Method Summary

Modifier and Type	Method	Description
V	get(K key)	Get a cached value by key.
void	prune()	Prune shared values no longer in use.
V	put(K key, S shareKey, Function<S,V> valueProvider, long ttl)	Add a value to the cache.

Methods inherited from class java.lang.Object

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

Constructor Details

BasicSharedValueCache

public BasicSharedValueCache()

Constructor.

BasicSharedValueCache

public BasicSharedValueCache(ConcurrentMap<K,net.solarnetwork.util.CachedResult<V>> cache,
 ConcurrentMap<S,V> sharedCache)

Constructor.

Parameters:

cache - the primary cache

sharedCache - the shared cache

Method Details

get

public V get(K key)

Description copied from interface: SharedValueCache

Get a cached value by key.

Specified by:

get in interface SharedValueCache<K,V,S>

Parameters:

key - the key of the value to get

Returns:

the value, or null if not available (or expired)

put

public V put(K key,
 S shareKey,
 Function<S,V> valueProvider,
 long ttl)

Description copied from interface: SharedValueCache

Add a value to the cache.

Specified by:

put in interface SharedValueCache<K,V,S>

Parameters:

key - the cache key

shareKey - the shared value key

valueProvider - the cache value provider

ttl - the cache value time to live, in seconds

Returns:

the value, either a shared instance or newly computed by valueProvider

prune

public void prune()

Prune shared values no longer in use.

Specified by:

prune in interface SharedValueCache<K,V,S>