Package gw.util.concurrent
Class Cache<K,V>
java.lang.Object
gw.util.concurrent.Cache<K,V>
- Direct Known Subclasses:
TypeSystemAwareCache
static var MY_CACHE = new Cache<Foo, Bar>( 1000, \ foo -> getBar( foo ) )
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Nested Class Summary
Nested ClassesModifier and TypeClassDescription(package private) static class
AConcurrentMap
with a doubly-linked list running through its entries.static interface
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate Cache.ConcurrentLinkedHashMap<K,
V> private final AtomicInteger
private ScheduledFuture<?>
private final AtomicInteger
private final Cache.MissHandler<K,
V> private final String
private final AtomicInteger
private final int
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Constructor Summary
ConstructorsConstructorDescriptionCache
(String name, int size, Cache.MissHandler<K, V> missHandler) This will create a new cache -
Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
private void
This will evict a specific key from the cache.This will get a specific entry, it will call the missHandler if it is not found.int
double
int
getHits()
int
int
int
logEveryNSeconds
(int seconds, ILogger logger) Sets up a recurring task every n seconds to report on the status of this cache.static <K,
V> Cache<K, V> make
(String name, int size, Cache.MissHandler<K, V> handler) This will put a specific entry in the cachevoid
toString()
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Field Details
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_cacheImpl
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_missHandler
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_name
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_size
private final int _size -
_requests
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_misses
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_hits
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_loggingTask
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Constructor Details
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Cache
This will create a new cache- Parameters:
name
- the name of the cache for loggingsize
- the maximum size of the logmissHandler
- how to handle misses, this is required not to be null
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Method Details
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clearCacheImpl
private void clearCacheImpl() -
evict
This will evict a specific key from the cache.- Parameters:
key
- the key to evict- Returns:
- the current value for that key
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put
This will put a specific entry in the cache- Parameters:
key
- this is the keyvalue
- this is the value- Returns:
- the old value for this key
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get
This will get a specific entry, it will call the missHandler if it is not found.- Parameters:
key
- the object to find- Returns:
- the found object (may be null)
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getConfiguredSize
public int getConfiguredSize() -
getUtilizedSize
public int getUtilizedSize() -
getRequests
public int getRequests() -
getMisses
public int getMisses() -
getHits
public int getHits() -
getHitRate
public double getHitRate() -
logEveryNSeconds
Sets up a recurring task every n seconds to report on the status of this cache. This can be useful if you are doing exploratory caching and wish to monitor the performance of this cache with minimal fuss. Consider- Parameters:
seconds
- how often to log the entrylogger
- the logger to use- Returns:
- this
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stopLogging
public void stopLogging() -
clear
public void clear() -
toString
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make
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