Golang example of creating a timestamped key for an immutable key/value store like Groupcache.

example-hash.go

package main

import "fmt"
import "time"
import "encoding/hex"
import "hash/fnv"

func main() {
  h := fnv.New64a()

  // Hash of Timestamp rounded to previous hour
  h.Write([]byte(time.Now().Round(time.Hour).Add(-1*time.Hour).String()))
  h.Write([]byte("UofMWeather/zip:get"))
  fmt.Print(hex.EncodeToString(h.Sum(nil)), "\n")

  // Reset our Hash
  h.Reset()

  // Hash of Timestamp rounded to this Hour
  h.Write([]byte(time.Now().Round(time.Hour).String()))
  h.Write([]byte("UofMWeather/zip:get"))
  fmt.Print(hex.EncodeToString(h.Sum(nil)), "\n")
}

Just a few hash links showing usage, going to write a blog post here soon

http://play.golang.org/p/VgpRolcAMT
http://play.golang.org/p/laWKlg-38D

and timestamp

http://play.golang.org/p/RiAFHd-KYh
http://play.golang.org/p/vAZlpawyPH

Exactly what I was looking for. Thanks!