According to the Twitter SnowFlake Theory, A ThreadSafe Unique ID Generator written by Golang
根据 Twitter SnowFlake 算法, 实现的分布式线程安全 UID 生成器
- ThreadSafe unique id generator
- Green pluggable, without external storage like Redis or MySQL
- Suitable for distributed systems
- Implement Twitter's SnowFlake theory
0 41 51 64
+---------------+----------------+-----------+
|timestamp(ms) | worker node id | sequence |
+---------------+----------------+-----------+
id = timestamp | workerid | sequence (eg. 1451063443347648410)
An id is composed by three part: timestamp in millon second, worker id, and sequence. Sequence is zero default. when timestamp is the same, we use sequence to avoid conflict
go get github.com/zheng-ji/goSnowFlake
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 != nill {
fmt.Println(id)
}
}
}Copyright (c) 2015 by zheng-ji released under MIT License.