Move sync deps, change uuid to google and update go.mod

sync/leader/etcd/etcd.go

@@ -1,145 +0,0 @@
-package etcd
-
-import (
-	"context"
-	"log"
-	"path"
-	"strings"
-
-	client "github.com/coreos/etcd/clientv3"
-	cc "github.com/coreos/etcd/clientv3/concurrency"
-	"github.com/micro/go-micro/sync/leader"
-)
-
-type etcdLeader struct {
-	opts   leader.Options
-	path   string
-	client *client.Client
-}
-
-type etcdElected struct {
-	s  *cc.Session
-	e  *cc.Election
-	id string
-}
-
-func (e *etcdLeader) Elect(id string, opts ...leader.ElectOption) (leader.Elected, error) {
-	var options leader.ElectOptions
-	for _, o := range opts {
-		o(&options)
-	}
-
-	// make path
-	path := path.Join(e.path, strings.Replace(id, "/", "-", -1))
-
-	s, err := cc.NewSession(e.client)
-	if err != nil {
-		return nil, err
-	}
-
-	l := cc.NewElection(s, path)
-
-	ctx, _ := context.WithCancel(context.Background())
-
-	if err := l.Campaign(ctx, id); err != nil {
-		return nil, err
-	}
-
-	return &etcdElected{
-		e:  l,
-		id: id,
-	}, nil
-}
-
-func (e *etcdLeader) Follow() chan string {
-	ch := make(chan string)
-
-	s, err := cc.NewSession(e.client)
-	if err != nil {
-		return ch
-	}
-
-	l := cc.NewElection(s, e.path)
-	ech := l.Observe(context.Background())
-
-	go func() {
-		for {
-			select {
-			case r, ok := <-ech:
-				if !ok {
-					return
-				}
-				ch <- string(r.Kvs[0].Value)
-			}
-		}
-	}()
-
-	return ch
-}
-
-func (e *etcdLeader) String() string {
-	return "etcd"
-}
-
-func (e *etcdElected) Reelect() error {
-	ctx, _ := context.WithCancel(context.Background())
-	return e.e.Campaign(ctx, e.id)
-}
-
-func (e *etcdElected) Revoked() chan bool {
-	ch := make(chan bool, 1)
-	ech := e.e.Observe(context.Background())
-
-	go func() {
-		for r := range ech {
-			if string(r.Kvs[0].Value) != e.id {
-				ch <- true
-				close(ch)
-				return
-			}
-		}
-	}()
-
-	return ch
-}
-
-func (e *etcdElected) Resign() error {
-	return e.e.Resign(context.Background())
-}
-
-func (e *etcdElected) Id() string {
-	return e.id
-}
-
-func NewLeader(opts ...leader.Option) leader.Leader {
-	var options leader.Options
-	for _, o := range opts {
-		o(&options)
-	}
-
-	var endpoints []string
-
-	for _, addr := range options.Nodes {
-		if len(addr) > 0 {
-			endpoints = append(endpoints, addr)
-		}
-	}
-
-	if len(endpoints) == 0 {
-		endpoints = []string{"http://127.0.0.1:2379"}
-	}
-
-	// TODO: parse addresses
-	c, err := client.New(client.Config{
-		Endpoints: endpoints,
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	return &etcdLeader{
-		path:   "/micro/leader",
-		client: c,
-		opts:   options,
-	}
-}