distributed-timeids

Distributed time id generation, loosely inspired by Twitter Snowflake.

Ids generated from the same source sort lexographically. Ids from seperate sources sort lexographically by (time division, source, counter) where the time division is bucketed by specified duration.

Installation

$ npm install distributed-timeids

Example

let duration = 60*1000

const timeids = require('distributed-timeids')
let nextTimeId = timeids({template: "0000000-anExample-000", duration})
let nextTimeId_R = timeids()

console.log()
console.log(nextTimeId())
console.log(nextTimeId_R())
console.log(nextTimeId())
console.log(nextTimeId_R())
console.log()

setTimeout(() => {
    console.log()
    console.log(nextTimeId())
    console.log(nextTimeId_R())
    console.log(nextTimeId())
    console.log(nextTimeId_R())
    console.log()
  }, duration+1)

Output

  08vvz6k-anExample-000
  0j6yi-$idhn$-0000
  08vvz6k-anExample-001
  0j6yi-$idhn$-0001


  08vvz6l-anExample-000
  0j6yi-$idhn$-0002
  08vvz6l-anExample-001
  0j6yi-$idhn$-0003

Options

Common:

• template: a '-' separated string or array where the first and last items are used to pad the time divison and local counter.

• duration: defaulted to 60 * 1000 milliseconds (1 minute). Determines the "width" of the time division buckets.

• update(bodyId, timeDivision): an optional function called for each new time divison. Return a new bodyId for subsequent time ids.

Less common:

• fmt_id: an optional function called to combine the elements into a string result.

• ts_base: defaulted to new Date('2015-01-01T00:00:00').valueOf(). Determines the starting point of the time division buckets.

• radix: defaulted to 36. Determines the base (radix) of the number formatting. (e.g. 10 is decimal, 16 is hex, 36 is the max for value.toString(36))

• bodyId, digits, prefix, suffix, sep — …read the source, Luke!