/
vulcand.go
58 lines (45 loc) · 1.37 KB
/
vulcand.go
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package main
import (
"encoding/json"
"fmt"
etcd "github.com/coreos/etcd/client"
"golang.org/x/net/context"
"time"
)
//go:generate ffjson $GOFILE
type Backend struct {
Type string
}
const backendPathPattern = "%s/backends/%s/backend"
const serverTTL = 60 * time.Second
func (b *Backend) put(ctx context.Context, client etcd.KeysAPI, vulcanpath, servicename string) error {
myContext, cancel := context.WithTimeout(ctx, DefaultTimeout)
defer cancel()
key := fmt.Sprintf(backendPathPattern, vulcanpath, servicename)
be, err := json.Marshal(b)
if err != nil {
return err
}
_, err = client.Set(myContext, key, fmt.Sprintf("%s", be), &etcd.SetOptions{TTL: 0, PrevExist: etcd.PrevIgnore})
return err
}
type Server struct {
URL string
}
const serverPathPattern = "%s/backends/%s/servers/%s"
func newServer(host string, port int64) Server {
return Server{
URL: fmt.Sprintf("http://%s:%d", host, port),
}
}
func (s *Server) put(ctx context.Context, client etcd.KeysAPI, vulcanpath, servicename, instancename string) error {
myContext, cancel := context.WithTimeout(ctx, DefaultTimeout)
defer cancel()
key := fmt.Sprintf(serverPathPattern, vulcanpath, servicename, instancename)
se, err := json.Marshal(s)
if err != nil {
return err
}
_, err = client.Set(myContext, key, fmt.Sprintf("%s", se), &etcd.SetOptions{TTL: serverTTL, PrevExist: etcd.PrevIgnore})
return err
}