added a hash generator

This commit is contained in:
Stephen McQuay 2013-08-28 18:10:08 -07:00
parent 0512bb7664
commit 922acbdb54
1 changed files with 31 additions and 0 deletions

31
id.go Normal file
View File

@ -0,0 +1,31 @@
package main
import (
"crypto/md5"
"fmt"
"io"
"time"
)
type IdGenerator struct {
id chan int64
}
func NewIdGenerator() *IdGenerator {
g := IdGenerator{}
g.id = make(chan int64)
go func() {
var i int64
for i = 0; ; i++ {
g.id <- i
}
}()
return &g
}
func (id *IdGenerator) Hash() string {
h := md5.New()
ns := time.Now().UnixNano() + <-id.id
io.WriteString(h, fmt.Sprintf("%d", ns))
return fmt.Sprintf("%x", h.Sum(nil))
}