mv pkg/stopper pkg/stop

This makes most of the callsites stutter slightly less.

middleware/jwt/jwt.go

@@ -23,7 +23,7 @@ import (
 
 	"github.com/chihaya/chihaya/bittorrent"
 	"github.com/chihaya/chihaya/middleware"
-	"github.com/chihaya/chihaya/pkg/stopper"
+	"github.com/chihaya/chihaya/pkg/stop"
 )
 
 var (
@@ -114,7 +114,7 @@ func (h *hook) Stop() <-chan error {
 	log.Debug("attempting to shutdown JWT middleware")
 	select {
 	case <-h.closing:
-		return stopper.AlreadyStopped
+		return stop.AlreadyStopped
 	default:
 	}
 	c := make(chan error)

middleware/middleware.go

@@ -9,7 +9,7 @@ import (
 	log "github.com/Sirupsen/logrus"
 	"github.com/chihaya/chihaya/bittorrent"
 	"github.com/chihaya/chihaya/frontend"
-	"github.com/chihaya/chihaya/pkg/stopper"
+	"github.com/chihaya/chihaya/pkg/stop"
 	"github.com/chihaya/chihaya/storage"
 )
 
@@ -104,18 +104,18 @@ func (l *Logic) AfterScrape(ctx context.Context, req *bittorrent.ScrapeRequest,
 
 // Stop stops the Logic.
 //
-// This stops any hooks that implement stopper.Stopper.
+// This stops any hooks that implement stop.stop.
 func (l *Logic) Stop() []error {
-	stopGroup := stopper.NewStopGroup()
+	stopGroup := stop.NewGroup()
 	for _, hook := range l.preHooks {
-		stoppable, ok := hook.(stopper.Stopper)
+		stoppable, ok := hook.(stop.Stopper)
 		if ok {
 			stopGroup.Add(stoppable)
 		}
 	}
 
 	for _, hook := range l.postHooks {
-		stoppable, ok := hook.(stopper.Stopper)
+		stoppable, ok := hook.(stop.Stopper)
 		if ok {
 			stopGroup.Add(stoppable)
 		}

pkg/stop/stop.go

@@ -1,5 +1,5 @@
-// Package stopper implements a pattern for shutting down a group of processes.
-package stopper
+// Package stop implements a pattern for shutting down a group of processes.
+package stop
 
 import (
 	"sync"
@@ -22,52 +22,52 @@ func init() {
 type Stopper interface {
 	// Stop returns a channel that indicates whether the stop was
 	// successful.
-	// The channel can either return one error or be closed. Closing the
-	// channel signals a clean shutdown.
-	// The Stop function should return immediately and perform the actual
-	// shutdown in a separate goroutine.
+	//
+	// The channel can either return one error or be closed.
+	// Closing the channel signals a clean shutdown.
+	// Stop() should return immediately and perform the actual shutdown in a
+	// separate goroutine.
 	Stop() <-chan error
 }
 
-// StopGroup is a group that can be stopped.
-type StopGroup struct {
-	stoppables []Func
-	sync.Mutex
-}
-
 // Func is a function that can be used to provide a clean shutdown.
 type Func func() <-chan error
 
-// NewStopGroup creates a new StopGroup.
-func NewStopGroup() *StopGroup {
-	return &StopGroup{
+// Group is a collection of Stoppers that can be stopped all at once.
+type Group struct {
+	stoppables []Func
+	sync.Mutex
+}
+
+// NewGroup allocates a new Group.
+func NewGroup() *Group {
+	return &Group{
 		stoppables: make([]Func, 0),
 	}
 }
 
-// Add adds a Stopper to the StopGroup.
-// On the next call to Stop(), the Stopper will be stopped.
-func (cg *StopGroup) Add(toAdd Stopper) {
+// Add appends a Stopper to the Group.
+func (cg *Group) Add(toAdd Stopper) {
 	cg.Lock()
 	defer cg.Unlock()
 
 	cg.stoppables = append(cg.stoppables, toAdd.Stop)
 }
 
-// AddFunc adds a Func to the StopGroup.
-// On the next call to Stop(), the Func will be called.
-func (cg *StopGroup) AddFunc(toAddFunc Func) {
+// AddFunc appends a Func to the Group.
+func (cg *Group) AddFunc(toAddFunc Func) {
 	cg.Lock()
 	defer cg.Unlock()
 
 	cg.stoppables = append(cg.stoppables, toAddFunc)
 }
 
-// Stop stops all members of the StopGroup.
+// Stop stops all members of the Group.
+//
 // Stopping will be done in a concurrent fashion.
 // The slice of errors returned contains all errors returned by stopping the
 // members.
-func (cg *StopGroup) Stop() []error {
+func (cg *Group) Stop() []error {
 	cg.Lock()
 	defer cg.Unlock()
 

storage/storage.go

@@ -2,7 +2,7 @@ package storage
 
 import (
 	"github.com/chihaya/chihaya/bittorrent"
-	"github.com/chihaya/chihaya/pkg/stopper"
+	"github.com/chihaya/chihaya/pkg/stop"
 )
 
 // ErrResourceDoesNotExist is the error returned by all delete methods in the
@@ -65,8 +65,8 @@ type PeerStore interface {
 	// returned.
 	ScrapeSwarm(infoHash bittorrent.InfoHash, addressFamily bittorrent.AddressFamily) bittorrent.Scrape
 
-	// Stopper is an interface that expects a Stop method to stop the
+	// stop is an interface that expects a Stop method to stop the
 	// PeerStore.
-	// For more details see the documentation in the stopper package.
-	stopper.Stopper
+	// For more details see the documentation in the stop package.
+	stop.Stopper
 }