Package org.infinispan.container.entries

Class ImmortalCacheEntry

java.lang.Object

org.infinispan.container.entries.AbstractInternalCacheEntry

org.infinispan.container.entries.ImmortalCacheEntry

All Implemented Interfaces:

Cloneable, Map.Entry, CacheEntry, InternalCacheEntry, MetadataAware

Direct Known Subclasses:

MetadataImmortalCacheEntry

public class ImmortalCacheEntry
extends AbstractInternalCacheEntry

A cache entry that is immortal/cannot expire

Since:

4.0

Author:

Manik Surtani

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ImmortalCacheEntry.Externalizer

Field Summary

Fields inherited from class org.infinispan.container.entries.AbstractInternalCacheEntry

internalMetadata, key, value

Constructor Summary

Constructors

Modifier	Constructor	Description
	ImmortalCacheEntry(Object key, Object value)
protected	ImmortalCacheEntry(Object key, Object value, PrivateMetadata internalMetadata)

Method Summary

Modifier and Type	Method	Description
final boolean	canExpire()
ImmortalCacheEntry	clone()
final long	getCreated()
final long	getExpiryTime()	Only used with entries that have a lifespan, this determines when an entry is due to expire.
final long	getLastUsed()
final long	getLifespan()
final long	getMaxIdle()
Metadata	getMetadata()	Get metadata of this cache entry.
final boolean	isExpired(long now)
void	reincarnate(long now)	"Reincarnates" an entry.
void	setMetadata(Metadata metadata)	Set the metadata in the cache entry.
InternalCacheValue<?>	toInternalCacheValue()	Creates a representation of this entry as an InternalCacheValue.
void	touch(long currentTimeMillis)	Updates access timestamps on this instance to a specified time

Methods inherited from class org.infinispan.container.entries.AbstractInternalCacheEntry

appendFieldsToString, commit, equals, getInternalMetadata, getKey, getValue, hashCode, isChanged, isCreated, isEvicted, isL1Entry, isNull, isRemoved, setChanged, setCreated, setEvicted, setInternalMetadata, setRemoved, setSkipLookup, setValue, skipLookup, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.infinispan.container.entries.CacheEntry

setCreated, setLastUsed

Methods inherited from interface org.infinispan.container.entries.InternalCacheEntry

canExpireMaxIdle

Constructor Details

ImmortalCacheEntry

public ImmortalCacheEntry(Object key,
 Object value)

ImmortalCacheEntry

protected ImmortalCacheEntry(Object key,
 Object value,
 PrivateMetadata internalMetadata)

Method Details

isExpired

public final boolean isExpired(long now)

Parameters:

now - the current time as defined by System.currentTimeMillis() or TimeService.wallClockTime()

Returns:

true if the entry has expired; false otherwise

canExpire

public final boolean canExpire()

Returns:

true if the entry can expire, false otherwise

getCreated

public final long getCreated()

Returns:

timestamp when the entry was created

getLastUsed

public final long getLastUsed()

Returns:

timestamp when the entry was last used

getLifespan

public final long getLifespan()

Returns:

retrieves the lifespan of this entry. -1 means an unlimited lifespan.

getMaxIdle

public final long getMaxIdle()

Returns:

the maximum allowed time for which this entry can be idle, after which it is considered expired.

getExpiryTime

public final long getExpiryTime()

Description copied from interface: InternalCacheEntry

Only used with entries that have a lifespan, this determines when an entry is due to expire.

Returns:

timestamp when the entry is due to expire, or -1 if it doesn't have a lifespan

touch

public void touch(long currentTimeMillis)

Description copied from interface: InternalCacheEntry

Updates access timestamps on this instance to a specified time

Parameters:

currentTimeMillis - the current time as defined by System.currentTimeMillis() or TimeService.wallClockTime()

reincarnate

public void reincarnate(long now)

Description copied from interface: InternalCacheEntry

"Reincarnates" an entry. Essentially, resets the 'created' timestamp of the entry to the current time.

Parameters:

now - the current time as defined by System.currentTimeMillis() or TimeService.wallClockTime()

toInternalCacheValue

public InternalCacheValue<?> toInternalCacheValue()

Description copied from interface: InternalCacheEntry

Creates a representation of this entry as an InternalCacheValue. The main purpose of this is to provide a representation that does not have a reference to the key. This is useful in situations where the key is already known or stored elsewhere, making serialization and deserialization more efficient.

Note that this should not be used to optimize memory overhead, since the saving of an additional reference to a key (a single object reference) does not warrant the cost of constructing an InternalCacheValue. This only makes sense when marshalling is involved, since the cost of marshalling the key again can be sidestepped using an InternalCacheValue if the key is already known/marshalled.

Returns:

a new InternalCacheValue encapsulating this InternalCacheEntry's value and expiration information.

getMetadata

public Metadata getMetadata()

Description copied from interface: MetadataAware

Get metadata of this cache entry.

Specified by:

getMetadata in interface MetadataAware

Overrides:

getMetadata in class AbstractInternalCacheEntry

Returns:

a Metadata instance

setMetadata

public void setMetadata(Metadata metadata)

Description copied from interface: MetadataAware

Set the metadata in the cache entry.

Specified by:

setMetadata in interface MetadataAware

Overrides:

setMetadata in class AbstractInternalCacheEntry

Parameters:

metadata - to apply to the cache entry

clone

public ImmortalCacheEntry clone()

Specified by:

clone in interface CacheEntry

Specified by:

clone in interface InternalCacheEntry

Overrides:

clone in class AbstractInternalCacheEntry