com.pavelvlasov.cache
Class PassiveMemoryCache

java.lang.Object
  com.pavelvlasov.cache.AbstractProducer
      com.pavelvlasov.cache.PassiveMemoryCache

All Implemented Interfaces:

Cache, Component, Producer

public class PassiveMemoryCache

extends AbstractProducer

implements Cache

Memory sensitive cache. Uses soft references to cache objects. Doesn't create helper threads - housekeepeng happens on every 'cleanupInterval' get() invocation.

Version:

$Revision: 1.3 $

Author:

Pavel Vlasov

Constructor Summary

PassiveMemoryCache(Producer producer, Cache fallBack, int cleanupInterval)

Method Summary

void	clear() Removes all cache entries
protected void	finalize()
Entry	get(java.lang.Object key)
boolean	isActive()
java.util.Set	keySet()
void	put(java.lang.Object key, java.lang.Object value, long time, long expirationTime) Puts entry to cache
void	remove(Acceptor acceptor) Removes keys accepted by acceptor
void	remove(java.lang.Object key) Removes entry with specified key
void	setOwner(java.lang.Object owner) Invoked by container to set component owner for callbacks.
void	start() Invoked by container before the first use.
void	stop() Invoked by container when component is not needed anymore.

Methods inherited from class com.pavelvlasov.cache.AbstractProducer

addCache, onRemove

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.pavelvlasov.cache.Producer

addCache

Constructor Detail

PassiveMemoryCache

public PassiveMemoryCache(Producer producer,
                          Cache fallBack,
                          int cleanupInterval)

Method Detail

put

public void put(java.lang.Object key,
                java.lang.Object value,
                long time,
                long expirationTime)

Description copied from interface: Cache

Puts entry to cache

Specified by:

put in interface Cache

Parameters:

key - Key

value - Value

time - Timestamp (last modified)

expirationTime - Expiration time

get

public Entry get(java.lang.Object key)

Specified by:

get in interface Producer

clear

public void clear()

Description copied from interface: Cache

Removes all cache entries

Specified by:

clear in interface Cache

remove

public void remove(java.lang.Object key)

Description copied from interface: Cache

Removes entry with specified key

Specified by:

remove in interface Cache

Parameters:

key -

remove

public void remove(Acceptor acceptor)

Description copied from interface: Cache

Removes keys accepted by acceptor

Specified by:

remove in interface Cache

Parameters:

acceptor -

stop

public void stop()

Description copied from interface: Component

Invoked by container when component is not needed anymore. Component shall perform cleanup in this method.

Specified by:

stop in interface Component

finalize

protected void finalize()
                 throws java.lang.Throwable

Throws:

java.lang.Throwable

keySet

public java.util.Set keySet()

Specified by:

keySet in interface Producer

Returns:

all keys, null or empty collection if entire key set is not known

isActive

public boolean isActive()

Specified by:

isActive in interface Cache

Returns:

true if not shut down

start

public void start()
           throws ConfigurationException

Description copied from interface: Component

Invoked by container before the first use. Component shall perform initialization in this method.

Specified by:

start in interface Component

Throws:

ConfigurationException

setOwner

public void setOwner(java.lang.Object owner)

Description copied from interface: Component

Invoked by container to set component owner for callbacks.

Specified by:

setOwner in interface Component