water

Class Key

java.lang.Object

water.Iced<Key>

water.Key

All Implemented Interfaces:

java.lang.Cloneable, java.lang.Comparable, Freezable

public final class Key
extends Iced<Key>
implements java.lang.Comparable

Keys This class defines: - A Key's bytes (name) & hash - Known Disk & memory replicas. - A cache of somewhat expensive to compute stuff related to the current Cloud, plus a byte of the desired replication factor. Keys are expected to be a high-count item, hence the care about size. Keys are *interned* in the local K/V store, a non-blocking hash set and are kept pointer equivalent (via the interning) for cheap compares. The interning only happens after a successful insert in the local H2O.STORE via H2O.put_if_later.

Field Summary

Fields

Modifier and Type	Field and Description
byte[]	_kb
static byte	DVEC
static byte	JOB
static byte	VEC
static byte	VGROUP

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(java.lang.Object o)
boolean	equals(java.lang.Object o)
Key	getVecKey()
int	hashCode()
H2ONode	home_node()
boolean	home()
boolean	isChunkKey()
boolean	isVec()
static Key	make()
static Key	make(byte[] kb)
static Key	make(byte rf, byte systemType, H2ONode... replicas)
static Key	make(java.lang.String s)
static Key	makeUserHidden(Key orig)
Key	read_impl(AutoBuffer ab)
java.lang.String	toString() Converts the key to HTML displayable string.
int	type()
boolean	user_allowed()
AutoBuffer	write_impl(AutoBuffer ab)
DocGen.HTML	writeHTML_impl(DocGen.HTML ab)
AutoBuffer	writeJSON_impl(AutoBuffer ab)

Methods inherited from class water.Iced

clone, frozenType, read, readJSON_impl, readJSON, write, writeHTML, writeJSON

Methods inherited from class java.lang.Object

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

Field Detail

_kb

public byte[] _kb

JOB

public static final byte JOB

See Also:

Constant Field Values

VEC

public static final byte VEC

See Also:

Constant Field Values

DVEC

public static final byte DVEC

See Also:

Constant Field Values

VGROUP

public static final byte VGROUP

See Also:

Constant Field Values

Method Detail

isVec

public final boolean isVec()

isChunkKey

public final boolean isChunkKey()

getVecKey

public final Key getVecKey()

home

public boolean home()

home_node

public H2ONode home_node()

make

public static Key make(byte[] kb)

make

public static Key make(java.lang.String s)

make

public static Key make()

make

public static Key make(byte rf,
       byte systemType,
       H2ONode... replicas)

makeUserHidden

public static Key makeUserHidden(Key orig)

user_allowed

public boolean user_allowed()

type

public int type()

toString

public java.lang.String toString()

Converts the key to HTML displayable string. For user keys returns the key itself, for system keys returns their hexadecimal values.

Overrides:

toString in class java.lang.Object

Returns:

key as a printable string

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

compareTo

public int compareTo(java.lang.Object o)

Specified by:

compareTo in interface java.lang.Comparable

write_impl

public final AutoBuffer write_impl(AutoBuffer ab)

Specified by:

write_impl in interface Freezable

Overrides:

write_impl in class Iced<Key>

read_impl

public final Key read_impl(AutoBuffer ab)

Specified by:

read_impl in interface Freezable

Overrides:

read_impl in class Iced<Key>

writeHTML_impl

public final DocGen.HTML writeHTML_impl(DocGen.HTML ab)

Specified by:

writeHTML_impl in interface Freezable

Overrides:

writeHTML_impl in class Iced<Key>

writeJSON_impl

public final AutoBuffer writeJSON_impl(AutoBuffer ab)

Specified by:

writeJSON_impl in interface Freezable

Overrides:

writeJSON_impl in class Iced<Key>