org.rapidoid.cache.impl

Class ConcurrentCacheAtom<K,V>

java.lang.Object

org.rapidoid.RapidoidThing

org.rapidoid.cache.impl.ConcurrentCacheAtom<K,V>

All Implemented Interfaces:

Callable<V>, CacheAtom<V>

Direct Known Subclasses:

ConcurrentCacheAtomWithStats

@Authors(value="Nikolche Mihajlovski")
 @Since(value="5.3.0")
public class ConcurrentCacheAtom<K,V>
extends org.rapidoid.RapidoidThing
implements CacheAtom<V>, Callable<V>

Field Summary

Fields

Modifier and Type	Field and Description
protected CachedValue<V>	cachedValue
protected K	key
protected Mapper<K,V>	loader
protected ReentrantReadWriteLock	lock
protected long	ttlInMs

Constructor Summary

Constructors

Constructor and Description
ConcurrentCacheAtom(K key, Mapper<K,V> loader, long ttlInMs)

Method Summary

Modifier and Type	Method and Description
V	call()
V	get() Returns the cached value, recalculating/reloading it if expired.
V	getIfExists() Retrieves the cached value if it exists, or null otherwise.
void	invalidate() Invalidates the cached value.
void	set(V value) Sets a new cached value.
String	toString()
protected void	updateStats(boolean missed, boolean hasError)

Methods inherited from class java.lang.Object

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

Field Detail

lock

protected final ReentrantReadWriteLock lock

key

protected final K key

loader

protected final Mapper<K,V> loader

ttlInMs

protected final long ttlInMs

cachedValue

protected volatile CachedValue<V> cachedValue

Constructor Detail

ConcurrentCacheAtom

public ConcurrentCacheAtom(K key,
                           Mapper<K,V> loader,
                           long ttlInMs)

Method Detail

get

public V get()

Returns the cached value, recalculating/reloading it if expired.

Specified by:

get in interface CacheAtom<V>

getIfExists

public V getIfExists()

Retrieves the cached value if it exists, or null otherwise.

Specified by:

getIfExists in interface CacheAtom<V>

updateStats

protected void updateStats(boolean missed,
                           boolean hasError)

set

public void set(V value)

Sets a new cached value.

Specified by:

set in interface CacheAtom<V>

invalidate

public void invalidate()

Invalidates the cached value.

Specified by:

invalidate in interface CacheAtom<V>

call

public V call()
       throws Exception

Specified by:

call in interface Callable<V>

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object