goSnowFlake

A threadsafe unique ID generator inspired by Twitter SnowFlake theory

根据 Twitter SnowFlake 算法， 实现的分布式线程安全 UID 生成器

Feature

• ThreadSafe unique id generator
• Green pluggable, without external storage like Redis or MySQL
• Suitable for distributed systems
• Implement Twitter's SnowFlake theory

Description

+---------------+----------------+----------------+
|timestamp(ms)42  | worker id(10) | sequence(12)  |
+---------------+----------------+----------------+

id  = timestamp | workerid | sequence (eg. 1451063443347648410)

An unique ID contains 3 parts:

• a timestamp in nanosecond
• a worker ID
• a sequence number

Installation

go get github.com/zheng-ji/goSnowFlake

Example

import (
    "fmt"
    "github.com/zheng-ji/goSnowFlake"
)

func main() {
    // Params: Given the workerId, 0 < workerId < 1024
    iw, err := goSnowFlake.NewIdWorker(1) 
    if err!= nil {
        fmt.Println(err)
    }
    for i := 0; i < 100; i++ {
        if id, err := iw.NextId(); err != nil {
            fmt.Println(err)
        } else{
            fmt.Println(id)
        }
    }
}

Documentation

• Twitter Blog Reference
• Reddit Discuss

License

Copyright (c) 2016 by zheng-ji released under MIT License.