Golang Client.Put方法代碼示例

func makeMirror(ctx context.Context, c *clientv3.Client, dc *clientv3.Client) error {
	total := int64(0)

	go func() {
		for {
			time.Sleep(30 * time.Second)
			fmt.Println(atomic.LoadInt64(&total))
		}
	}()

	// TODO: remove the prefix of the destination cluster?
	s := mirror.NewSyncer(c, mmprefix, 0)

	rc, errc := s.SyncBase(ctx)

	for r := range rc {
		for _, kv := range r.Kvs {
			_, err := dc.Put(ctx, string(kv.Key), string(kv.Value))
			if err != nil {
				return err
			}
			atomic.AddInt64(&total, 1)
		}
	}

	err := <-errc
	if err != nil {
		return err
	}

	wc := s.SyncUpdates(ctx)

	for wr := range wc {
		if wr.CompactRevision != 0 {
			return rpctypes.ErrCompacted
		}

		var rev int64
		ops := []clientv3.Op{}

		for _, ev := range wr.Events {
			nrev := ev.Kv.ModRevision
			if rev != 0 && nrev > rev {
				_, err := dc.Txn(ctx).Then(ops...).Commit()
				if err != nil {
					return err
				}
				ops = []clientv3.Op{}
			}
			switch ev.Type {
			case storagepb.PUT:
				ops = append(ops, clientv3.OpPut(string(ev.Kv.Key), string(ev.Kv.Value)))
				atomic.AddInt64(&total, 1)
			case storagepb.DELETE, storagepb.EXPIRE:
				ops = append(ops, clientv3.OpDelete(string(ev.Kv.Key)))
				atomic.AddInt64(&total, 1)
			default:
				panic("unexpected event type")
			}
		}

		if len(ops) != 0 {
			_, err := dc.Txn(ctx).Then(ops...).Commit()
			if err != nil {
				return err
			}
		}
	}

	return nil
}

func syncProcess_v3FSEvent(localDir string, serverPrefix string, c3 *clientv3.Client, event fileChangeEvent) {
	etcdPath, err := filepath.Rel(localDir, event.Path)
	if err != nil {
		log.Printf("syncProcess_v3 error get relpath '%v': %v\n", event.Path, err)
		return
	}
	etcdPath = serverPrefix + etcdPath
	etcdPath = strings.Replace(etcdPath, string(os.PathSeparator), "/", -1)

	switch {
	case event.IsRemoved:
		_, err := c3.Delete(context.Background(), etcdPath)
		if err != nil {
			log.Printf("syncProcess_v3 error while delete etcdkey '%v': %v\n", etcdPath, err)
		}
	case event.IsDir:
		files, _ := ioutil.ReadDir(event.Path)
		for _, file := range files {
			path := filepath.Join(event.Path, file.Name())
			content := []byte(nil)
			if !file.IsDir() {
				content, err = ioutil.ReadFile(path)
				if err != nil {
					log.Println(err)
				}
			}
			syncProcess_v3FSEvent(localDir, serverPrefix, c3, fileChangeEvent{
				Path:      path,
				IsDir:     file.IsDir(),
				IsRemoved: false,
				Content:   content,
			})
		}
	case !event.IsDir:
		resp, err := c3.Get(context.Background(), etcdPath)
		if err != nil {
			log.Printf("syncProcess_v3 Can't read key '%v': %v\n", etcdPath, err)
		}
		if len(resp.Kvs) > 0 {
			if bytes.Equal(resp.Kvs[0].Value, event.Content) {
				return
			}
		}
		_, err = c3.Put(context.Background(), etcdPath, string(event.Content))
		if err != nil {
			log.Printf("syncProcess_v3 error while put etcdkey '%v': %v\n", etcdPath, err)
		}
	}
}

func makeMirror(ctx context.Context, c *clientv3.Client, dc *clientv3.Client) error {
	total := int64(0)

	go func() {
		for {
			time.Sleep(30 * time.Second)
			fmt.Println(atomic.LoadInt64(&total))
		}
	}()

	s := mirror.NewSyncer(c, mmprefix, 0)

	rc, errc := s.SyncBase(ctx)

	// if destination prefix is specified and remove destination prefix is true return error
	if mmnodestprefix && len(mmdestprefix) > 0 {
		ExitWithError(ExitBadArgs, fmt.Errorf("`--dest-prefix` and `--no-dest-prefix` cannot be set at the same time, choose one."))
	}

	// if remove destination prefix is false and destination prefix is empty set the value of destination prefix same as prefix
	if !mmnodestprefix && len(mmdestprefix) == 0 {
		mmdestprefix = mmprefix
	}

	for r := range rc {
		for _, kv := range r.Kvs {
			_, err := dc.Put(ctx, modifyPrefix(string(kv.Key)), string(kv.Value))
			if err != nil {
				return err
			}
			atomic.AddInt64(&total, 1)
		}
	}

	err := <-errc
	if err != nil {
		return err
	}

	wc := s.SyncUpdates(ctx)

	for wr := range wc {
		if wr.CompactRevision != 0 {
			return rpctypes.ErrCompacted
		}

		var rev int64
		ops := []clientv3.Op{}

		for _, ev := range wr.Events {
			nrev := ev.Kv.ModRevision
			if rev != 0 && nrev > rev {
				_, err := dc.Txn(ctx).Then(ops...).Commit()
				if err != nil {
					return err
				}
				ops = []clientv3.Op{}
			}
			switch ev.Type {
			case mvccpb.PUT:
				ops = append(ops, clientv3.OpPut(modifyPrefix(string(ev.Kv.Key)), string(ev.Kv.Value)))
				atomic.AddInt64(&total, 1)
			case mvccpb.DELETE:
				ops = append(ops, clientv3.OpDelete(modifyPrefix(string(ev.Kv.Key))))
				atomic.AddInt64(&total, 1)
			default:
				panic("unexpected event type")
			}
		}

		if len(ops) != 0 {
			_, err := dc.Txn(ctx).Then(ops...).Commit()
			if err != nil {
				return err
			}
		}
	}

	return nil
}