com.bankframe.services.cache
Class TimeoutCachePolicy

java.lang.Object
  com.bankframe.services.cache.TimeoutCachePolicy

All Implemented Interfaces:

CachePolicy, ConfigurableCachePolicy

public class TimeoutCachePolicy
extends Object
implements ConfigurableCachePolicy

This class implements a time-out based caching policy. Any entry in the cache that has not been accessed within the time-out period is removed. This policy supports the following configurable properties:

• timeOut A long value specifiying in seconds how long entries should be kept in cache

Constructor Summary

TimeoutCachePolicy()
Default Constructor

TimeoutCachePolicy(long timeOut)
This constructor builds a timeout cache policy with the given timeout value

Method Summary

Set	cleanup() This method returns a set containing the keys of values that have expired.
void	configure(BankFrameResource config)
long	getTimeOut()
boolean	isCacheEntryValid(Object key, Object value) This method determines if the specified entry should be removed from the cache
void	remove(Object key) This method signals the entry has been removed from the cache
void	remove(Set keySet) This method signals the set of entries has been removed from the cache
void	removeAll() This method signals that all entries have been removed from the cache
void	setTimeOut(long l)
void	updateCacheEntries(Map values) This method updates all the specified values
void	updateCacheEntry(Object key, Object value) This method updates the last access time for the specified entry

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeoutCachePolicy

public TimeoutCachePolicy()

Default Constructor

TimeoutCachePolicy

public TimeoutCachePolicy(long timeOut)

This constructor builds a timeout cache policy with the given timeout value

Parameters:

timeOut - the number of miliseconds before a cache entry invalidates

Method Detail

cleanup

public Set cleanup()

This method returns a set containing the keys of values that have expired. If this method returns an empty set then there are no values to be removed. If this method returns a null value, then all values have expired

Specified by:

cleanup in interface CachePolicy

Returns:

set containing the keys

isCacheEntryValid

public boolean isCacheEntryValid(Object key,
                                 Object value)

This method determines if the specified entry should be removed from the cache

Specified by:

isCacheEntryValid in interface CachePolicy

Parameters:

key - the key from of object to check

value - the value of the object to check

Returns:

true if the entry has expired otherwise false

remove

public void remove(Object key)

This method signals the entry has been removed from the cache

Specified by:

remove in interface CachePolicy

Parameters:

key - the key of the entry to remove from the meta data

remove

public void remove(Set keySet)

This method signals the set of entries has been removed from the cache

Specified by:

remove in interface CachePolicy

Parameters:

keySet - a set of keys to remove from the metadata

removeAll

public void removeAll()

This method signals that all entries have been removed from the cache

Specified by:

removeAll in interface CachePolicy

updateCacheEntries

public void updateCacheEntries(Map values)

This method updates all the specified values

Specified by:

updateCacheEntries in interface CachePolicy

Parameters:

values - a map of values to update

updateCacheEntry

public void updateCacheEntry(Object key,
                             Object value)

This method updates the last access time for the specified entry

Specified by:

updateCacheEntry in interface CachePolicy

Parameters:

key - the key of the cache entry to update

value - the value for this key

configure

public void configure(BankFrameResource config)

Specified by:

configure in interface ConfigurableCachePolicy

getTimeOut

public long getTimeOut()

Returns:

long

setTimeOut

public void setTimeOut(long l)

Parameters:

l -