com.enremmeta.rtb.caches

Class CacheObject<T>

java.lang.Object

com.enremmeta.rtb.caches.CacheObject<T>

All Implemented Interfaces:

Serializable

public class CacheObject<T>
extends Object
implements Serializable

A wrapper for an object to be cached in a cache. In addition to the actual payload it stores information on the last fetch time. The reason for this, instead of using local cache's TTL-based eviction policy, is that we don't want to evict an object; we want to fetch a new copy without stampede, and, in the meantime, keep returning a stale one.

Author:

Gregory Golberg (grisha@alum.mit.edu) Copyright © Enremmeta LLC 2014. All Rights Reserved.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private long	fetchedTime
private boolean	isNull
private T	object
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
CacheObject()
CacheObject(T value)

Method Summary

Modifier and Type	Method and Description
long	getFetchedTime()
T	getObject()
boolean	isNull()
void	setFetchedTime(long fetchedTime)
void	setFetchedTimeNow()
void	setNull()
void	setObject(T object)

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

isNull

private boolean isNull

fetchedTime

private long fetchedTime

object

private T object

Constructor Detail

CacheObject

public CacheObject(T value)

CacheObject

public CacheObject()

Method Detail

isNull

public boolean isNull()

setNull

public void setNull()

getFetchedTime

public long getFetchedTime()

setFetchedTimeNow

public void setFetchedTimeNow()

setFetchedTime

public void setFetchedTime(long fetchedTime)

getObject

public T getObject()

setObject

public void setObject(T object)