etcd.go watch is not working

[oliveagle]

currently the following code is enough

func (c *Client) Watch(key string, stop chan bool) <-chan *backend.Response {
    respChan := make(chan *backend.Response, 0)
    go func() {
        for {
            var resp *goetcd.Response
            var err error
            //if c.waitIndex == 0 {
            //  resp, err = c.client.Get(key, false, false)
            //  if err != nil {
            //      respChan <- &backend.Response{nil, err}
            //      time.Sleep(time.Second * 5)
            //      continue
            //  }
            //  c.waitIndex = resp.EtcdIndex
            //  respChan <- &backend.Response{[]byte(resp.Node.Value), nil}
            //}
            //resp, err = c.client.Watch(key, c.waitIndex+1, false, nil, stop)
            resp, err = c.client.Watch(key, 0, false, nil, stop)
            if err != nil {
                respChan <- &backend.Response{nil, err}
                time.Sleep(time.Second * 5)
                continue
            }
            c.waitIndex = resp.Node.ModifiedIndex
            respChan <- &backend.Response{[]byte(resp.Node.Value), nil}
        }
    }()
    return respChan
}