org.boon.cache

Class FastConcurrentReadLruLfuFifoCache<KEY,VALUE>

java.lang.Object

org.boon.cache.FastConcurrentReadLruLfuFifoCache<KEY,VALUE>

Type Parameters:

KEY - key

VALUE - value

All Implemented Interfaces:

Cache<KEY,VALUE>

public class FastConcurrentReadLruLfuFifoCache<KEY,VALUE>
extends Object
implements Cache<KEY,VALUE>

Fast concurrent read cache with many options. Writes are slow (single threaded lock) Reads are very fast no lock. Compaction (if you are over the limit) is slow.

Constructor Summary

Constructors

Constructor and Description
FastConcurrentReadLruLfuFifoCache(int evictSize) New cache LFU is the default.
FastConcurrentReadLruLfuFifoCache(int evictSize, Tradeoffs tradeoffs, CacheType type) New cache

Method Summary

Methods

Modifier and Type	Method and Description
VALUE	get(KEY key) Get the value from the cache.
VALUE	getSilent(KEY key) Used for testing as it gets the value without updating stats
void	put(KEY key, VALUE value) Put the value.
void	remove(KEY key) Remove the key.
int	size() How many items do we have in the cache?
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

FastConcurrentReadLruLfuFifoCache

public FastConcurrentReadLruLfuFifoCache(int evictSize)

New cache LFU is the default.

Parameters:

evictSize -

FastConcurrentReadLruLfuFifoCache

public FastConcurrentReadLruLfuFifoCache(int evictSize,
                                 Tradeoffs tradeoffs,
                                 CacheType type)

New cache

Parameters:

evictSize - eviction size

tradeoffs - tradeoffs

type - cache type.

Method Detail

get

public VALUE get(KEY key)

Get the value from the cache. It does not touch the lock so reads are fast. This does not touch the order list so it is fast.

Specified by:

get in interface Cache<KEY,VALUE>

Parameters:

key - the key

Returns:

value

getSilent

public VALUE getSilent(KEY key)

Used for testing as it gets the value without updating stats

Specified by:

getSilent in interface Cache<KEY,VALUE>

Parameters:

key - key

Returns:

value

remove

public void remove(KEY key)

Remove the key. This touches the lock. So removes are **not** fast.

Specified by:

remove in interface Cache<KEY,VALUE>

Parameters:

key - key

put

public void put(KEY key,
       VALUE value)

Put the value. This touches the lock so puts are **not** fast.

Specified by:

put in interface Cache<KEY,VALUE>

Parameters:

key - the key key

value - the value value

toString

public String toString()

Overrides:

toString in class Object

size

public int size()

How many items do we have in the cache?

Specified by:

size in interface Cache<KEY,VALUE>

Returns:

size