一个实现 Twitter SnowFlake 算法 的 Go 分布式 UID 生成器

## [goSnowFlake](https://github.com/zheng-ji/goSnowFlake) [](https://travis-ci.org/zheng-ji/goSnowFlake) [](https://godoc.org/github.com/zheng-ji/goSnowFlake) 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  Feature -------- * 线程安全的 UID 生成器 * 绿色可插拔，无需依赖 Redis,Mysql,无状态 * 适合分布式系统 * 实现 Twitter SnowFlake 理论 Description ----------- ``` 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 Installation ------------- ``` go get github.com/zheng-ji/goSnowFlake ``` Example ------- ```go 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) } } } ``` Documentation ------------- - [Twitter Blog Reference](https://blog.twitter.com/2010/announcing-snowflake) - [Reddit Discuss](https://www.reddit.com/comments/cajap/twitter_announces_snowflake_a_distributed_unique/)