net.sf.jkniv.cache

Class TTLCachePolicy

java.lang.Object

net.sf.jkniv.cache.TTLCachePolicy

All Implemented Interfaces:

CachePolicy

public class TTLCachePolicy
extends Object
implements CachePolicy

Cache policy using concepts from Time to live (TTL) to limit the lifetime of data.

Since:

0.6.0

Author:

Alisson Gomes

Field Summary

Fields inherited from interface net.sf.jkniv.cache.CachePolicy

DEFAULT_INITIALDELAY, DEFAULT_PERIOD, DEFAULT_SIZE, DEFAULT_SIZEOF, DEFAULT_TTI, DEFAULT_TTL

Constructor Summary

Constructors

Constructor and Description
TTLCachePolicy(long ttl) Build a policy with TTL as parameter to keep the objects alive in cache
TTLCachePolicy(long ttl, long tti) Build a policy with TTL and TTI as parameter to keep the objects alive in cache
TTLCachePolicy(long ttl, long tti, long size, String sizeof) Build a policy with TTL and TTI as parameter to keep the objects alive in cache
TTLCachePolicy(long ttl, long tti, TimeUnit unit) Build a policy with TTL and TTI as parameter to keep the objects alive in cache
TTLCachePolicy(long ttl, long tti, TimeUnit unit, long size, String sizeof) Build a policy with TTL and TTI as parameter to keep the objects alive in cache

Method Summary

Modifier and Type	Method and Description
boolean	isAlive(long ttl) Verify if cache is live indicating to discard the cache content.
boolean	isAlive(long ttl, long tti) Verify if cache is live indicating to discard the cache content.
long	size() Returns the number of elements in cache.
long	sizeof() Returns the limit size of objects in cache.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

TTLCachePolicy

public TTLCachePolicy(long ttl)

Build a policy with TTL as parameter to keep the objects alive in cache

Parameters:

ttl - time in seconds

TTLCachePolicy

public TTLCachePolicy(long ttl,
                      long tti)

Build a policy with TTL and TTI as parameter to keep the objects alive in cache

Parameters:

ttl - time-to-live in seconds

tti - time-to-idle in seconds

TTLCachePolicy

public TTLCachePolicy(long ttl,
                      long tti,
                      TimeUnit unit)

Build a policy with TTL and TTI as parameter to keep the objects alive in cache

Parameters:

ttl - time-to-live in seconds

tti - time-to-idle in seconds

unit - time unit for TTL and TTI

TTLCachePolicy

public TTLCachePolicy(long ttl,
                      long tti,
                      long size,
                      String sizeof)

Build a policy with TTL and TTI as parameter to keep the objects alive in cache

Parameters:

ttl - time-to-live in seconds

tti - time-to-idle in seconds

size - limit for number of object

sizeof - limit for size for sum of objects

TTLCachePolicy

public TTLCachePolicy(long ttl,
                      long tti,
                      TimeUnit unit,
                      long size,
                      String sizeof)

Build a policy with TTL and TTI as parameter to keep the objects alive in cache

Parameters:

ttl - time-to-live in seconds

tti - time-to-idle in seconds

unit - time unit for TTL and TTI

size - limit for number of object

sizeof - limit for size for sum of objects

Method Detail

isAlive

public boolean isAlive(long ttl)

Description copied from interface: CachePolicy

Verify if cache is live indicating to discard the cache content.

Specified by:

isAlive in interface CachePolicy

Parameters:

ttl - time from object stored

Returns:

true when object is alive, false otherwise

isAlive

public boolean isAlive(long ttl,
                       long tti)

Description copied from interface: CachePolicy

Verify if cache is live indicating to discard the cache content.

Specified by:

isAlive in interface CachePolicy

Parameters:

ttl - time-to-live from stored object in seconds

tti - time-to-idle for stored store in seconds

Returns:

true when object is alive, false otherwise

size

public long size()

Description copied from interface: CachePolicy

Returns the number of elements in cache.

Specified by:

size in interface CachePolicy

Returns:

the number of elements in cache.

sizeof

public long sizeof()

Description copied from interface: CachePolicy

Returns the limit size of objects in cache.

Specified by:

sizeof in interface CachePolicy

Returns:

the limit size of objects in cache.

toString

public String toString()

Overrides:

toString in class Object