v3 refactor (#1868)

* Move to v3

Co-authored-by: Ben Toogood <bentoogood@gmail.com>

router/watcher.go

@@ -2,7 +2,6 @@ package router
 
 import (
 	"errors"
-	"sync"
 	"time"
 )
 
@@ -77,48 +76,3 @@ func WatchService(s string) WatchOption {
 		o.Service = s
 	}
 }
-
-// tableWatcher implements routing table Watcher
-type tableWatcher struct {
-	sync.RWMutex
-	id      string
-	opts    WatchOptions
-	resChan chan *Event
-	done    chan struct{}
-}
-
-// Next returns the next noticed action taken on table
-// TODO: right now we only allow to watch particular service
-func (w *tableWatcher) Next() (*Event, error) {
-	for {
-		select {
-		case res := <-w.resChan:
-			switch w.opts.Service {
-			case res.Route.Service, "*":
-				return res, nil
-			default:
-				continue
-			}
-		case <-w.done:
-			return nil, ErrWatcherStopped
-		}
-	}
-}
-
-// Chan returns watcher events channel
-func (w *tableWatcher) Chan() (<-chan *Event, error) {
-	return w.resChan, nil
-}
-
-// Stop stops routing table watcher
-func (w *tableWatcher) Stop() {
-	w.Lock()
-	defer w.Unlock()
-
-	select {
-	case <-w.done:
-		return
-	default:
-		close(w.done)
-	}
-}