io.atomix.protocols.gossip.map

Class MapValue

java.lang.Object

io.atomix.protocols.gossip.map.MapValue

All Implemented Interfaces:

Comparable<MapValue>

public class MapValue
extends Object
implements Comparable<MapValue>

Representation of a value in EventuallyConsistentMap.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MapValue.Digest Digest or summary of a MapValue for use during Anti-Entropy exchanges.

Constructor Summary

Constructors

Constructor and Description
MapValue(byte[] value, Timestamp timestamp) Constructor automatically to create the system time of construction.
MapValue(byte[] value, Timestamp timestamp, long creationTime) Creates a map value using value, timestamp, and creation time.

Method Summary

Modifier and Type	Method and Description
int	compareTo(MapValue o)
MapValue	copy() Creates a copy of MapValue.
long	creationTime() Returns the creation time of this value.
MapValue.Digest	digest() Returns summary of a MapValue for use during Anti-Entropy exchanges.
boolean	equals(Object other)
byte[]	get() Returns this value.
<V> V	get(com.google.common.base.Function<byte[],V> decoder) Returns the decoded value.
int	hashCode()
boolean	isAlive() Tests if this value is alive.
boolean	isNewerThan(MapValue other) Tests if this value is newer than the specified MapValue.
boolean	isNewerThan(Timestamp timestamp) Tests if this timestamp is newer than the specified timestamp.
boolean	isTombstone() Tests if this value is tombstone value with the specified timestamp.
Timestamp	timestamp() Returns the timestamp of this value.
static MapValue	tombstone(Timestamp timestamp) Creates a tombstone value with the specified timestamp.
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MapValue

public MapValue(byte[] value,
                Timestamp timestamp)

Constructor automatically to create the system time of construction.

Parameters:

value - value

timestamp - value timestamp

MapValue

public MapValue(byte[] value,
                Timestamp timestamp,
                long creationTime)

Creates a map value using value, timestamp, and creation time.

Parameters:

value - value

timestamp - value timestamp.

creationTime - the system time (on local instance) of construction

Method Detail

tombstone

public static MapValue tombstone(Timestamp timestamp)

Creates a tombstone value with the specified timestamp.

Parameters:

timestamp - timestamp for tombstone

Returns:

tombstone MapValue

copy

public MapValue copy()

Creates a copy of MapValue.

The copy will have an updated creation time corresponding to when the copy was constructed.

Returns:

MapValue copy

isTombstone

public boolean isTombstone()

Tests if this value is tombstone value with the specified timestamp.

Returns:

true if this value is null, otherwise false

isAlive

public boolean isAlive()

Tests if this value is alive.

Returns:

true if this value is not null, otherwise false

timestamp

public Timestamp timestamp()

Returns the timestamp of this value.

Returns:

timestamp

get

public byte[] get()

Returns this value.

Returns:

value

get

public <V> V get(com.google.common.base.Function<byte[],V> decoder)

Returns the decoded value.

Type Parameters:

V - the decoded value type

Parameters:

decoder - the decoder with which to decode the value

Returns:

the decoded value

creationTime

public long creationTime()

Returns the creation time of this value.

Returns:

creationTime

isNewerThan

public boolean isNewerThan(MapValue other)

Tests if this value is newer than the specified MapValue.

Parameters:

other - the value to be compared

Returns:

true if this value is newer than other

isNewerThan

public boolean isNewerThan(Timestamp timestamp)

Tests if this timestamp is newer than the specified timestamp.

Parameters:

timestamp - timestamp to be compared

Returns:

true if this instance is newer

digest

public MapValue.Digest digest()

Returns summary of a MapValue for use during Anti-Entropy exchanges.

Returns:

Digest with timestamp and whether this value is null or not

compareTo

public int compareTo(MapValue o)

Specified by:

compareTo in interface Comparable<MapValue>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object