org.apache.cassandra.utils

Class TimeUUID

java.lang.Object

org.apache.cassandra.utils.TimeUUID

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<TimeUUID>

Direct Known Subclasses:

Ballot

public class TimeUUID
extends java.lang.Object
implements java.io.Serializable, java.lang.Comparable<TimeUUID>

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	TimeUUID.AbstractSerializer<T extends TimeUUID>
static class	TimeUUID.Generator
static class	TimeUUID.Serializer

Field Summary

Fields

Modifier and Type	Field and Description
static long	serialVersionUID
protected static long	TIMESTAMP_UUID_VERSION_IN_MSB
static long	UUID_EPOCH_UNIX_MILLIS
protected static long	UUID_VERSION_BITS_IN_MSB

Constructor Summary

Constructors

Constructor and Description
TimeUUID(long uuidTimestamp, long lsb)

Method Summary

Modifier and Type	Method and Description
java.util.UUID	asUUID()
static TimeUUID	atUnixMicrosWithLsb(long unixMicros, long uniqueLsb)
static java.util.UUID	atUnixMicrosWithLsbAsUUID(long unixMicros, long uniqueLsb)
int	compareTo(TimeUUID that)
static TimeUUID	deserialize(java.nio.ByteBuffer buffer)
static TimeUUID	deserialize(java.io.DataInput in)
boolean	equals(java.lang.Object that)
boolean	equals(TimeUUID that)
boolean	equals(java.util.UUID that)
static TimeUUID	fromBytes(long msb, long lsb)
static TimeUUID	fromString(java.lang.String uuidString)
static TimeUUID	fromUuid(java.util.UUID uuid)
int	hashCode()
long	lsb()
static TimeUUID	maxAtUnixMillis(long unixMillis) Returns the biggest possible type 1 UUID having the provided timestamp.
static TimeUUID	minAtUnixMillis(long unixMillis) Returns the smaller possible type 1 UUID having the provided timestamp.
long	msb()
static long	msbToRawTimestamp(long msb)
static long	rawTimestampToMsb(long rawTimestamp)
static long	rawTimestampToUnixMicros(long rawTimestamp)
void	serialize(java.io.DataOutput out)
static long	sizeInBytes()
java.nio.ByteBuffer	toBytes()
static byte[]	toBytes(long msb, long lsb)
java.lang.String	toString()
static java.lang.String	toString(TimeUUID ballot)
static java.lang.String	toString(TimeUUID ballot, java.lang.String kind)
long	unix(java.util.concurrent.TimeUnit units) The Cassandra internal micros-resolution timestamp of the TimeUUID, as of unix epoch
long	unixMicros() The Cassandra internal micros-resolution timestamp of the TimeUUID, as of unix epoch
static long	unixMicrosToRawTimestamp(long unixMicros)
static long	unixMillisToRawTimestamp(long unixMillis, long tenthsOfAMicro)
long	uuidTimestamp() The UUID-format timestamp, i.e.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

UUID_EPOCH_UNIX_MILLIS

public static final long UUID_EPOCH_UNIX_MILLIS

See Also:

Constant Field Values

TIMESTAMP_UUID_VERSION_IN_MSB

protected static final long TIMESTAMP_UUID_VERSION_IN_MSB

See Also:

Constant Field Values

UUID_VERSION_BITS_IN_MSB

protected static final long UUID_VERSION_BITS_IN_MSB

See Also:

Constant Field Values

Constructor Detail

TimeUUID

public TimeUUID(long uuidTimestamp,
                long lsb)

Method Detail

atUnixMicrosWithLsb

public static TimeUUID atUnixMicrosWithLsb(long unixMicros,
                                           long uniqueLsb)

atUnixMicrosWithLsbAsUUID

public static java.util.UUID atUnixMicrosWithLsbAsUUID(long unixMicros,
                                                       long uniqueLsb)

minAtUnixMillis

public static TimeUUID minAtUnixMillis(long unixMillis)

Returns the smaller possible type 1 UUID having the provided timestamp. Warning: this method should only be used for querying as this doesn't at all guarantee the uniqueness of the resulting UUID.

maxAtUnixMillis

public static TimeUUID maxAtUnixMillis(long unixMillis)

Returns the biggest possible type 1 UUID having the provided timestamp. Warning: this method should only be used for querying as this doesn't at all guarantee the uniqueness of the resulting UUID.

fromString

public static TimeUUID fromString(java.lang.String uuidString)

fromUuid

public static TimeUUID fromUuid(java.util.UUID uuid)

fromBytes

public static TimeUUID fromBytes(long msb,
                                 long lsb)

deserialize

public static TimeUUID deserialize(java.nio.ByteBuffer buffer)

deserialize

public static TimeUUID deserialize(java.io.DataInput in)
                            throws java.io.IOException

Throws:

java.io.IOException

serialize

public void serialize(java.io.DataOutput out)
               throws java.io.IOException

Throws:

java.io.IOException

toBytes

public java.nio.ByteBuffer toBytes()

toBytes

public static byte[] toBytes(long msb,
                             long lsb)

sizeInBytes

public static long sizeInBytes()

asUUID

public java.util.UUID asUUID()

unix

public long unix(java.util.concurrent.TimeUnit units)

The Cassandra internal micros-resolution timestamp of the TimeUUID, as of unix epoch

unixMicros

public long unixMicros()

The Cassandra internal micros-resolution timestamp of the TimeUUID, as of unix epoch

uuidTimestamp

public long uuidTimestamp()

The UUID-format timestamp, i.e. 10x micros-resolution, as of UUIDGen.UUID_EPOCH_UNIX_MILLIS The tenths of a microsecond are used to store a flag value.

msb

public long msb()

lsb

public long lsb()

rawTimestampToUnixMicros

public static long rawTimestampToUnixMicros(long rawTimestamp)

unixMillisToRawTimestamp

public static long unixMillisToRawTimestamp(long unixMillis,
                                            long tenthsOfAMicro)

unixMicrosToRawTimestamp

public static long unixMicrosToRawTimestamp(long unixMicros)

msbToRawTimestamp

public static long msbToRawTimestamp(long msb)

rawTimestampToMsb

public static long rawTimestampToMsb(long rawTimestamp)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object that)

Overrides:

equals in class java.lang.Object

equals

public boolean equals(TimeUUID that)

equals

public boolean equals(java.util.UUID that)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toString

public static java.lang.String toString(TimeUUID ballot)

toString

public static java.lang.String toString(TimeUUID ballot,
                                        java.lang.String kind)

compareTo

public int compareTo(TimeUUID that)

Specified by:

compareTo in interface java.lang.Comparable<TimeUUID>