com.github.f4b6a3.uuid.timestamp

Class DefaultTimestampStrategy

java.lang.Object

com.github.f4b6a3.uuid.sequence.AbstractSequence

com.github.f4b6a3.uuid.timestamp.DefaultTimestampStrategy

All Implemented Interfaces:

Sequence, TimestampStrategy

Direct Known Subclasses:

StoppedDefaultTimestampStrategy

public class DefaultTimestampStrategy
extends AbstractSequence
implements TimestampStrategy

This is an implementation of TimestampStrategy that provides millisecond resolution. The timestamp resolution is simulated by adding the value of a counter that is incremented at every call to the method TimestampStrategy.getTimestamp(). This class counts how many times a timestamp was used. This value added to the timestamp is used to simulate a high resolution clock. The maximum value of this counter is 10,000, 'the number of 100-nanosecond intervals per' milliseconds. ### RFC-4122 - 4.2.1.2. System Clock Resolution (4) A high resolution timestamp can be simulated by keeping a count of the number of UUIDs that have been generated with the same value of the system time, and using it to construct the low order bits of the timestamp. The count will range between zero and the number of 100-nanosecond intervals per system time interval.

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	COUNTER_MAX
protected static int	COUNTER_MIN
protected long	timestamp

Fields inherited from class com.github.f4b6a3.uuid.sequence.AbstractSequence

MAX_VALUE, MIN_VALUE, value

Constructor Summary

Constructors

Constructor and Description
DefaultTimestampStrategy()

Method Summary

Modifier and Type	Method and Description
protected int	getNextForTimestamp(long timestamp) Get how many times a timestamp.
long	getTimestamp()

Methods inherited from class com.github.f4b6a3.uuid.sequence.AbstractSequence

current, max, min, next, reset, set

Methods inherited from class java.lang.Object

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

Field Detail

timestamp

protected long timestamp

COUNTER_MIN

protected static final int COUNTER_MIN

See Also:

Constant Field Values

COUNTER_MAX

protected static final int COUNTER_MAX

See Also:

Constant Field Values

Constructor Detail

DefaultTimestampStrategy

public DefaultTimestampStrategy()

Method Detail

getTimestamp

public long getTimestamp()

Specified by:

getTimestamp in interface TimestampStrategy

getNextForTimestamp

protected int getNextForTimestamp(long timestamp)

Get how many times a timestamp.

Parameters:

timestamp - a timestamp

Returns:

the clock sequence