README
¶
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
License
Copyright (c) 2016 by zheng-ji released under MIT License.
Documentation
¶
Index ¶
Constants ¶
View Source
const ( CEpoch = 1474802888000 CWorkerIdBits = 10 // Num of WorkerId Bits CSenquenceBits = 12 // Num of Sequence Bits CWorkerIdShift = 12 CTimeStampShift = 22 CSequenceMask = 0xfff // equal as getSequenceMask() CMaxWorker = 0x3ff // equal as getMaxWorkerId() )
Variables ¶
This section is empty.
Functions ¶
Types ¶
type IdWorker ¶
type IdWorker struct {
// contains filtered or unexported fields
}
IdWorker Struct
func NewIdWorker ¶
NewIdWorker Func: Generate NewIdWorker with Given workerid
Source Files
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