net.dontdrinkandroot.cache.metadata.impl

Class SimpleMetaData

java.lang.Object

net.dontdrinkandroot.cache.metadata.impl.SimpleMetaData

All Implemented Interfaces:

Serializable, MetaData

public class SimpleMetaData
extends Object
implements MetaData

Author:

Philip W. Sorst

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static double	DECAY_FACTOR

Constructor Summary

Constructors

Constructor and Description
SimpleMetaData(long timeToLive)
SimpleMetaData(long created, long timeToLive)
SimpleMetaData(long created, long timeToLive, long maxIdleTime)

Method Summary

Methods

Modifier and Type	Method and Description
void	decay() Decreases the hitcount for use with LRU based expunge strategies.
long	getCreated() Get the timestamp when the entry was created.
long	getExpiry() Get the timestamp when the entry expires.
int	getHitCount() Get the number of hits.
long	getLastAccess() Get the timestamp when the entry was last accessed.
long	getMaxIdleTime() Get the maximum time that the entry may idle (not being accessed) before being evicted (in milliseconds).
long	getTimeToLive() Gets the time to live of this entry (in milliseconds).
void	increaseHitCount()
boolean	isExpired() Check if the entry is expired.
boolean	isStale() Check if the entry has not been accessed within the idle period.
String	toString()
void	update() Update the entry after a cache hit.

Methods inherited from class java.lang.Object

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

Field Detail

DECAY_FACTOR

public static final double DECAY_FACTOR

See Also:

Constant Field Values

Constructor Detail

SimpleMetaData

public SimpleMetaData(long timeToLive)

SimpleMetaData

public SimpleMetaData(long created,
              long timeToLive)

SimpleMetaData

public SimpleMetaData(long created,
              long timeToLive,
              long maxIdleTime)

Method Detail

getTimeToLive

public long getTimeToLive()

Description copied from interface: MetaData

Gets the time to live of this entry (in milliseconds).

Specified by:

getTimeToLive in interface MetaData

getExpiry

public final long getExpiry()

Description copied from interface: MetaData

Get the timestamp when the entry expires.

Specified by:

getExpiry in interface MetaData

update

public final void update()

Description copied from interface: MetaData

Update the entry after a cache hit.

Specified by:

update in interface MetaData

getLastAccess

public final long getLastAccess()

Description copied from interface: MetaData

Get the timestamp when the entry was last accessed.

Specified by:

getLastAccess in interface MetaData

getHitCount

public final int getHitCount()

Description copied from interface: MetaData

Get the number of hits.

Specified by:

getHitCount in interface MetaData

isExpired

public boolean isExpired()

Description copied from interface: MetaData

Check if the entry is expired.

Specified by:

isExpired in interface MetaData

getCreated

public long getCreated()

Description copied from interface: MetaData

Get the timestamp when the entry was created.

Specified by:

getCreated in interface MetaData

isStale

public boolean isStale()

Description copied from interface: MetaData

Check if the entry has not been accessed within the idle period.

Specified by:

isStale in interface MetaData

getMaxIdleTime

public long getMaxIdleTime()

Description copied from interface: MetaData

Get the maximum time that the entry may idle (not being accessed) before being evicted (in milliseconds).

Specified by:

getMaxIdleTime in interface MetaData

decay

public void decay()

Description copied from interface: MetaData

Decreases the hitcount for use with LRU based expunge strategies.

Specified by:

decay in interface MetaData

increaseHitCount

public final void increaseHitCount()

toString

public String toString()

Overrides:

toString in class Object