package org.infinispan.container.entries;
import org.infinispan.metadata.Metadata;
/**
* A representation of an InternalCacheEntry that does not have a reference to the key. This should be used if the key
* is either not needed or available elsewhere as it is more efficient to marshall and unmarshall. Probably most useful
* in cache stores.
* <p/>
* 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, where an existing
* InternalCacheEntry is already referenced.
* <p/>
* Use of this interface <i>only</i> 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.
* <p/>
*
* @author Manik Surtani
* @since 4.0
*/
public interface InternalCacheValue<V> {
/**
* @return the value represented by this internal wrapper
*/
V getValue();
<K> InternalCacheEntry<K, V> toInternalCacheEntry(K key);
/**
* @param now the current time as expressed by {@link System#currentTimeMillis()}
* @return true if the entry has expired; false otherwise
*/
boolean isExpired(long now);
/**
* @return true if the entry has expired; false otherwise
* @deprecated use {@link #isExpired(long)}
*/
@Deprecated
boolean isExpired();
/**
* @return true if the entry can expire, false otherwise
*/
boolean canExpire();
/**
* @return timestamp when the entry was created
*/
long getCreated();
/**
* @return timestamp when the entry was last used
*/
long getLastUsed();
/**
* @return lifespan of the value
*/
long getLifespan();
/**
* @return max idle time allowed
*/
long getMaxIdle();
public long getExpiryTime();
Metadata getMetadata();
}