Package org.apache.hadoop.hdfs.protocol

Class CacheDirectiveInfo.Expiration

java.lang.Object

org.apache.hadoop.hdfs.protocol.CacheDirectiveInfo.Expiration

Enclosing class:

CacheDirectiveInfo

public static class CacheDirectiveInfo.Expiration
extends Object

Denotes a relative or absolute expiration time for a CacheDirective. Use factory methods newAbsolute(Date) and newRelative(long) to create an Expiration.

In either case, the server-side clock is used to determine when a CacheDirective expires.

Field Summary

Fields

Modifier and Type	Field	Description
static final long	MAX_RELATIVE_EXPIRY_MS	The maximum value we accept for a relative expiry.
static final CacheDirectiveInfo.Expiration	NEVER	An relative Expiration that never expires.

Method Summary

Modifier and Type	Method	Description
Date	getAbsoluteDate()
long	getAbsoluteMillis()
long	getMillis()
boolean	isRelative()
static CacheDirectiveInfo.Expiration	newAbsolute(long ms)	Create a new absolute Expiration.
static CacheDirectiveInfo.Expiration	newAbsolute(Date date)	Create a new absolute Expiration.
static CacheDirectiveInfo.Expiration	newRelative(long ms)	Create a new relative Expiration.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

MAX_RELATIVE_EXPIRY_MS

public static final long MAX_RELATIVE_EXPIRY_MS

The maximum value we accept for a relative expiry.

See Also:

• Constant Field Values

NEVER

public static final CacheDirectiveInfo.Expiration NEVER

An relative Expiration that never expires.

Method Details

newRelative

public static CacheDirectiveInfo.Expiration newRelative(long ms)

Create a new relative Expiration.

Use NEVER to indicate an Expiration that never expires.

Parameters:

ms - how long until the CacheDirective expires, in milliseconds

Returns:

A relative Expiration

newAbsolute

public static CacheDirectiveInfo.Expiration newAbsolute(Date date)

Create a new absolute Expiration.

Use NEVER to indicate an Expiration that never expires.

Parameters:

date - when the CacheDirective expires

Returns:

An absolute Expiration

newAbsolute

public static CacheDirectiveInfo.Expiration newAbsolute(long ms)

Create a new absolute Expiration.

Use NEVER to indicate an Expiration that never expires.

Parameters:

ms - when the CacheDirective expires, in milliseconds since the Unix epoch.

Returns:

An absolute Expiration

isRelative

public boolean isRelative()

Returns:

true if Expiration was specified as a relative duration, false if specified as an absolute time.

getMillis

public long getMillis()

Returns:

The raw underlying millisecond value, either a relative duration or an absolute time as milliseconds since the Unix epoch.

getAbsoluteDate

public Date getAbsoluteDate()

Returns:

Expiration time as a Date object. This converts a relative Expiration into an absolute Date based on the local clock.

getAbsoluteMillis

public long getAbsoluteMillis()

Returns:

Expiration time in milliseconds from the Unix epoch. This converts a relative Expiration into an absolute time based on the local clock.

toString

public String toString()

Overrides:

toString in class Object