org.apache.jena.atlas.lib.cache

Class CacheStatsAtomic<Key,Value>

java.lang.Object

org.apache.jena.atlas.lib.cache.CacheWrapper<Key,Value>

org.apache.jena.atlas.lib.cache.CacheStatsAtomic<Key,Value>

All Implemented Interfaces:

Cache<Key,Value>, CacheStats<Key,Value>

public class CacheStatsAtomic<Key,Value>
extends CacheWrapper<Key,Value>
implements CacheStats<Key,Value>

Capture statisics for a cache - this class is thread safe (you can read the stats while the cache is active)

Constructor Summary

Constructors

Constructor and Description
CacheStatsAtomic(Cache<Key,Value> cache)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
Value	get(Key key) Get from cache - or return null.
long	getCacheEjects()
long	getCacheEntries()
long	getCacheHits()
long	getCacheMisses()
Value	put(Key key, Value t) Insert into from cache and return old value (or null if none)
boolean	remove(Key key) Remove from cache - return true if key referenced an entry
void	setDropHandler(ActionKeyValue<Key,Value> dropHandler) Register a callback - called when an object is dropped from the cache (optional operation)

Methods inherited from class org.apache.jena.atlas.lib.cache.CacheWrapper

containsKey, isEmpty, keys, size

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.atlas.lib.Cache

containsKey, isEmpty, keys, size

Constructor Detail

CacheStatsAtomic

public CacheStatsAtomic(Cache<Key,Value> cache)

Method Detail

get

public Value get(Key key)

Description copied from interface: Cache

Get from cache - or return null. Implementations should state whether they are thread-safe or not.

Specified by:

get in interface Cache<Key,Value>

Overrides:

get in class CacheWrapper<Key,Value>

put

public Value put(Key key,
        Value t)

Description copied from interface: Cache

Insert into from cache and return old value (or null if none)

Specified by:

put in interface Cache<Key,Value>

Overrides:

put in class CacheWrapper<Key,Value>

remove

public boolean remove(Key key)

Description copied from interface: Cache

Remove from cache - return true if key referenced an entry

Specified by:

remove in interface Cache<Key,Value>

Overrides:

remove in class CacheWrapper<Key,Value>

clear

public void clear()

Specified by:

clear in interface Cache<Key,Value>

Overrides:

clear in class CacheWrapper<Key,Value>

setDropHandler

public void setDropHandler(ActionKeyValue<Key,Value> dropHandler)

Description copied from interface: Cache

Register a callback - called when an object is dropped from the cache (optional operation)

Specified by:

setDropHandler in interface Cache<Key,Value>

Overrides:

setDropHandler in class CacheWrapper<Key,Value>

getCacheEntries

public final long getCacheEntries()

Specified by:

getCacheEntries in interface CacheStats<Key,Value>

getCacheHits

public final long getCacheHits()

Specified by:

getCacheHits in interface CacheStats<Key,Value>

getCacheMisses

public final long getCacheMisses()

Specified by:

getCacheMisses in interface CacheStats<Key,Value>

getCacheEjects

public final long getCacheEjects()

Specified by:

getCacheEjects in interface CacheStats<Key,Value>