分布式学习十三:实现全局唯一id命名

package main
import (
   "errors"
   "fmt"
   "github.com/go-zookeeper/zk"
   "strings"
   "time"
)
func main() {
   conn, _, err := zk.Connect(\[\]string{"127.0.0.1:10001"}, time.Second)
   if err != nil {
      panic(err)
   }
   idPath := "/app1/tableName1/id/"
   createPath(conn, idPath)
   id,err := getGlobalID(conn, idPath)
   if err!=nil {
      fmt.Printf("%v \\n",err)
      return
   }
   fmt.Printf("Global ID: %s",id)
}
func getGlobalID(conn *zk.Conn, idPath string) (id string,err error) {
   id, err = conn.Create(idPath+"a_", \[\]byte{}, zk.FlagSequence, zk.WorldACL(zk.PermAll))
   if err != nil {
      return id,errors.New(err.Error())
   }
   fmt.Printf("Global ID:%s\\n", id)
   return id,nil
}
func createPath(conn *zk.Conn, path string) (err error) {
   strArr := strings.Split(path, "/")
   var node string
   for _, str := range strArr {
      if str == "" {
         continue
      }
      node = node + "/" + str
      exists, _, err := conn.Exists(node)
      if err != nil {
         return errors.New(err.Error())
      }
      if exists {
         continue
      } else {
         _, err = conn.Create(node, \[\]byte{}, 0, zk.WorldACL(zk.PermAll))
         if err != nil {
            return errors.New(err.Error())
         }
      }
   }
   return err
}