cmd/chihaya: stop hooks

Fixes #214.

cmd/chihaya/main.go

@@ -119,7 +119,11 @@ func rootCmdRun(cmd *cobra.Command, args []string) error {
 			}
 		}
 
-		// TODO(jzelinskie): stop hooks here
+		// Stop hooks.
+		errs := logic.Stop()
+		for _, err := range errs {
+			errChan <- err
+		}
 
 		close(errChan)
 	}()

middleware/jwt/jwt.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/chihaya/chihaya/bittorrent"
 	"github.com/chihaya/chihaya/middleware"
+	"github.com/chihaya/chihaya/stopper"
 )
 
 var (
@@ -94,8 +95,18 @@ func NewHook(cfg Config) middleware.Hook {
 	return h
 }
 
-func (h *hook) Stop() {
-	close(h.closing)
+func (h *hook) Stop() <-chan error {
+	select {
+	case <-h.closing:
+		return stopper.AlreadyStopped
+	default:
+	}
+	c := make(chan error)
+	go func() {
+		close(h.closing)
+		close(c)
+	}()
+	return c
 }
 
 func (h *hook) HandleAnnounce(ctx context.Context, req *bittorrent.AnnounceRequest, resp *bittorrent.AnnounceResponse) (context.Context, error) {

middleware/middleware.go

@@ -9,6 +9,7 @@ import (
 	log "github.com/Sirupsen/logrus"
 	"github.com/chihaya/chihaya/bittorrent"
 	"github.com/chihaya/chihaya/frontend"
+	"github.com/chihaya/chihaya/stopper"
 	"github.com/chihaya/chihaya/storage"
 )
 
@@ -94,3 +95,25 @@ func (l *Logic) AfterScrape(ctx context.Context, req *bittorrent.ScrapeRequest,
 		}
 	}
 }
+
+// Stop stops the Logic.
+//
+// This stops any hooks that implement stopper.Stopper.
+func (l *Logic) Stop() []error {
+	stopGroup := stopper.NewStopGroup()
+	for _, hook := range l.preHooks {
+		stoppable, ok := hook.(stopper.Stopper)
+		if ok {
+			stopGroup.Add(stoppable)
+		}
+	}
+
+	for _, hook := range l.postHooks {
+		stoppable, ok := hook.(stopper.Stopper)
+		if ok {
+			stopGroup.Add(stoppable)
+		}
+	}
+
+	return stopGroup.Stop()
+}