t-pwk / flake-idgen Goto Github PK
View Code? Open in Web Editor NEWFlake ID generator yields k-ordered, conflict-free ids in a distributed environment in Node.js
Home Page: https://www.npmjs.org/package/flake-idgen
License: MIT License
Flake ID generator yields k-ordered, conflict-free ids in a distributed environment in Node.js
Home Page: https://www.npmjs.org/package/flake-idgen
License: MIT License
@T-PWK From what I understand, the ms timestamp is 41 bits but in the readme 42 bits are reserved for the timestamp, what is the extra bit?
I use this, is not the method I use is wrong?
var intformat = require('biguint-format');
var FlakeId = require('flake-idgen');
var flakeIdGen = new FlakeId({epoch: 1300000000000});
var moment = require('moment')
module.exports = function(sequelize, DataTypes) {
return sequelize.define('employment_detail', {
id: {
type: DataTypes.STRING(45),
allowNull: false,
primaryKey: true,
// defaultValue: shortid.generate
defaultValue: intformat(flakeIdGen.next(), 'dec')
}
}
}
Hi,
Your package works fine until 1.3.0 but version 1.4.0 introduce some changes that makes build impossible with Webpack on UglifyJS step.
Error is:
ERROR in assets/bundle.js from UglifyJs
Unexpected character '`' [assets/bundle.js:203079,32]
Extract from devDependencies in our file package.json
:
"babel-core": "6.26.3",
"babel-loader": "7.1.5",
"babel-polyfill": "6.26.0",
"babel-preset-env": "1.7.0",
"babel-preset-react": "6.24.1",
"babel-preset-stage-0": "6.24.1",
"babel-register": "6.26.0",
"copy-webpack-plugin": "5.1.1",
"css-loader": "3.5.2",
"generate-json-webpack-plugin": "0.3.1",
"html-webpack-plugin": "4.2.0",
"imagemin-webpack-plugin": "2.4.2",
"style-loader": "1.1.4",
"uglifyjs-webpack-plugin": "2.2.0",
"url-loader": "4.1.0",
"webpack": "4.42.1",
"webpack-bundle-analyzer": "3.7.0",
"webpack-cli": "3.3.11",
"webpack-dev-server": "3.10.3",
"webpack-merge": "4.2.2"
First, thanks for creating this. It's really cool. I'm considering using it as a cryptographic nonce generator (not the intended use case I know, see SO question here), so I want to make sure it doesn't generate duplicate IDs.
I put together a simple test for it and ran it on my computer. I killed the process half way through to simulate an unexpected server shutdown and then resumed it again. After generating about 200,000,000 total ids in 4 processes running in parallel, I checked for duplicates and found a little under 2,000 (each with exactly 2 copies).
Is there something wrong with my testing methodology? Is this behavior expected?
Hello,
I would like to know if the generated id converted in decimal stay inside the range of the ?
Number.MAX_SAFE_INTEGER ?
Thank you and have a nice day.
function genFlakeId() {
const flakeIdGen = new FlakeId();
return intformat(flakeIdGen.next(), 'dec');
}
const ids = [];
for (let i = 0; i < 50; i++) {
ids.push(genFlakeId());
}
// ids
[
"6901552045816283136",
"6901552045820477440",
"6901552045820477440",
"6901552045833060352",
"6901552045837254656",
"6901552045841448960",
"6901552045845643264",
"6901552045849837568",
"6901552045854031872",
"6901552045858226176",
"6901552045862420480",
"6901552045875003392",
"6901552045879197696",
"6901552045879197696",
"6901552045879197696",
"6901552045883392000",
"6901552045883392000",
"6901552045883392000",
"6901552045883392000",
"6901552045883392000",
"6901552045887586304",
"6901552045887586304",
"6901552045887586304",
"6901552045887586304",
"6901552045887586304",
"6901552045891780608",
"6901552045891780608",
"6901552045891780608",
"6901552045891780608",
"6901552045891780608",
"6901552045895974912",
"6901552045895974912",
"6901552045895974912",
"6901552045895974912",
"6901552045900169216",
"6901552045900169216",
"6901552045900169216",
"6901552045900169216",
"6901552045900169216",
"6901552045904363520",
"6901552045904363520",
"6901552045904363520",
"6901552045908557824",
"6901552045908557824",
"6901552045908557824",
"6901552045912752128",
"6901552045912752128",
"6901552045912752128",
"6901552045916946432",
"6901552045916946432"
]
I tried to use this package in my Sveltekit project and got Buffer is not defined.
Here is my code:
import FlakeId from "flake-idgen";
import intformat from "biguint-format";
const flakeIdGen = new FlakeId();
let id = intformat(flakeIdGen.next(), "dec");
Here is my error log:
ReferenceError: Buffer is not defined
at module.exports.next (flake-id-gen.js:58:13)
at instance (MainComponent.svelte:11:49)
at init (index.mjs:2165:11)
at new MainComponent (MainComponent.svelte:24:23)
at createProxiedComponent (svelte-hooks.js?v=8eec1919:341:9)
at new ProxyComponent (proxy.js?v=8eec1919:242:7)
at new Proxy<MainComponent> (proxy.js?v=8eec1919:349:11)
at create_fragment (+page.svelte:12:97)
at init (index.mjs:2180:37)
at new Page (+page.svelte:141:20)
Not sure if this package will work in a Jamstack project.
I generate id
with flake-idgen
and biguint-format
but when try to save this id to mongodb get next error:
Error: Argument passed in must be a single String of 12 bytes or a string of 24 hex characters at new ObjectID
Is it real fix?
I am using flake-idgen in a distributed environment and am seeing duplicate Id errors on a the primary Id field under the circumstances below during K6 load testing (50 Vus):
2+ replicates of Id service
Datacenter = 0
Worker = 1,2,3,n
The issue does not exist when I run a single instance of the Id generation service (datacenter = 0, worker = 0). Based on observation, the Duplicate collisions are being produces by different instances of the service initialized with a different worker Id.
I'll attempt incrementing both datacenter and worker and leave a comment on the results.
Maybe it's a good idea to add a get function for retrieving the datacenter or worker id from a generated id?
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