water

Class Keyed

java.lang.Object

water.Iced

water.Keyed

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, Freezable

Direct Known Subclasses:

Job, Lockable, ModelMetrics, Vec

public abstract class Keyed
extends Iced

Iced, with a Key. Support for DKV removal.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
Key	_key Key mapping a Value which holds this object; may be null

Constructor Summary

Constructors

Constructor and Description
Keyed(Key key)

Method Summary

Methods

Modifier and Type	Method and Description
abstract long	checksum() High-quality 64-bit checksum of the content of the object.
protected Futures	remove_impl(Futures fs) Override to remove subparts, but not self, of composite Keyed objects.
void	remove() Remove this Keyed object, and all subparts; blocking.
Futures	remove(Futures fs) Remove this Keyed object, and all subparts.
static void	remove(Key k) Remove this Keyed object, and all subparts; blocking.
static void	remove(Key k, Futures fs) Remove this Keyed object, and all subparts.

Methods inherited from class water.Iced

clone, frozenType, read_impl, read, readExternal, readJSON_impl, readJSON, write_impl, write, writeExternal, writeHTML_impl, writeHTML, writeJSON_impl, writeJSON

Methods inherited from class java.lang.Object

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

Field Detail

_key

public final Key _key

Key mapping a Value which holds this object; may be null

Constructor Detail

Keyed

public Keyed(Key key)

Method Detail

remove

public final void remove()

Remove this Keyed object, and all subparts; blocking.

remove

public final Futures remove(Futures fs)

Remove this Keyed object, and all subparts.

remove_impl

protected Futures remove_impl(Futures fs)

Override to remove subparts, but not self, of composite Keyed objects. Examples include Vec (removing associated Chunk keys) and Frame (removing associated Vec keys.)

remove

public static void remove(Key k)

Remove this Keyed object, and all subparts; blocking.

remove

public static void remove(Key k,
          Futures fs)

Remove this Keyed object, and all subparts.

checksum

public abstract long checksum()

High-quality 64-bit checksum of the content of the object. Similar to hashcode(), but a long to reduce the chance of hash clashes. For composite objects this should be defined using the subcomponents' checksums (or hashcodes if not available). If two Keyed objects have the same checksum() there should be a 1 - 1/2^64 chance that they are the same object by value.