flake_uuid

Description:

flake uuid

Flake UUID #
Flake UUID is a Dart library that provides 64- and 128-bit, k-ordered
identifiers, which preserve their order of creation (somewhat) if sorted
lexically.
It generates conflict-free and unique identifiers without further
coordination between the nodes on your cluster (assuming time goes
forward and machine IDs are unique).
64-bit Flake ID #
The 64-bit Flake ID is created with:

42-bit timestamp (millis since epoch, good til the end of this century)
10-bit machine ID
11-bit sequence (incremented within the same millisecond)

A simple usage example, works only with Dart VM, because it uses the
environment to generate a somewhat-random machine ID:
import 'package:flake_uuid/flake_uuid.dart';

main() {
var x = flake64.nextInt();
var y = flake64.nextHex(); // '2b06cca4f5542000'
}
copied to clipboard
A more detailed version if you use the class directly. You must supply
a pre-coordinated machine ID:
import 'package:flake_uuid/flake_base.dart';

main() {
var flake = new Flake64(machineId: 123);
var x = flake.nextInt();
var y = flake.nextHex();
}
copied to clipboard
128-bit Flake ID #
The 128-bit Flake ID is created with:

64-bit timestamps (macroseconds(!) since epoch, won't run out in your lifetime)
48-bit machine ID
16-bit sequence (incremented within the same macrosecond)

A simple usage example, works only with Dart VM, because it uses the
environment to generate a somewhat-random machine ID:
import 'package:flake_uuid/flake_uuid.dart';

main() {
var y = flake128.nextHex(); // '2b06cca4f5542000'
}
copied to clipboard
A more detailed version if you use the class directly. You must supply
a pre-coordinated machine ID:
import 'package:flake_uuid/flake_base.dart';

main() {
var flake = new Flake128(machineId: 123);
var x = flake.nextInt(); // not recommended
var y = flake.nextHex(); // '000540947b2305c4a25c0001c73a0000'
var z = flake.nextUuid(); // '00054094-7b23-05c4-a25c-0001c73a0001'
}
copied to clipboard
Links #

source code
contributors: Agilord