Package tech.ytsaurus.core

Class YtTimestamp

java.lang.Object

tech.ytsaurus.core.YtTimestamp

public class YtTimestamp
extends java.lang.Object

Timestamp is a cluster-wide unique monotonically increasing number used to implement the MVCC paradigm.

Timestamp is a 64-bit unsigned integer of the following structure: bits 0-29: auto-incrementing counter (allowing up to ~10^9 timestamps per second) bits 30-61: Unix time in seconds (from 1 Jan 1970) bits 62-63: reserved

Field Summary

Fields

Modifier and Type	Field	Description
static YtTimestamp	ASYNC_LAST_COMMITTED	Relaxed (non-serializable) latest committed version.
static int	COUNTER_BITS
static long	COUNTER_MASK
static YtTimestamp	MAX	Maximum valid (non-sentinel) timestamp.
static YtTimestamp	MIN	Minimum valid (non-sentinel) timestamp.
static YtTimestamp	NULL	Uninitialized/invalid timestamp.
static YtTimestamp	SYNC_LAST_COMMITTED	Truly (serializable) latest committed version.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	YtTimestamp(long value)

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
static YtTimestamp	fromInstant(java.time.Instant instant)
long	getCounter()
java.time.Instant	getInstant()
long	getValue()
int	hashCode()
java.lang.String	toString()
static YtTimestamp	valueOf(long value)

Methods inherited from class java.lang.Object

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

Field Detail

COUNTER_BITS

public static final int COUNTER_BITS

See Also:

Constant Field Values

COUNTER_MASK

public static final long COUNTER_MASK

See Also:

Constant Field Values

MIN

public static final YtTimestamp MIN

Minimum valid (non-sentinel) timestamp.

MAX

public static final YtTimestamp MAX

Maximum valid (non-sentinel) timestamp.

NULL

public static final YtTimestamp NULL

Uninitialized/invalid timestamp.

SYNC_LAST_COMMITTED

public static final YtTimestamp SYNC_LAST_COMMITTED

Truly (serializable) latest committed version. May cause row blocking if concurrent writes are in progress.

ASYNC_LAST_COMMITTED

public static final YtTimestamp ASYNC_LAST_COMMITTED

Relaxed (non-serializable) latest committed version. Never leads to row blocking but may miss some concurrent writes.

Constructor Detail

YtTimestamp

protected YtTimestamp(long value)

Method Detail

getValue

public long getValue()

getInstant

public java.time.Instant getInstant()

getCounter

public long getCounter()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

valueOf

public static YtTimestamp valueOf(long value)

fromInstant

public static YtTimestamp fromInstant(@Nonnull
                                      java.time.Instant instant)