Function newGroup

groupcache.go:89–111

If peers is nil, the peerPicker is called via a sync.Once to initialize it.

(name string, cacheBytes int64, getter Getter, peers PeerPicker)

// If peers is nil, the peerPicker is called via a sync.Once to initialize it.
func newGroup(name string, cacheBytes int64, getter Getter, peers PeerPicker) *Group {
	if getter == nil {
		panic("nil Getter")
	}
	mu.Lock()
	defer mu.Unlock()
	initPeerServerOnce.Do(callInitPeerServer)
	if _, dup := groups[name]; dup {
		panic("duplicate registration of group " + name)
	}
	g := &Group{
		name:       name,
		getter:     getter,
		peers:      peers,
		cacheBytes: cacheBytes,
		loadGroup:  &singleflight.Group{},
	}
	if fn := newGroupHook; fn != nil {
		fn(g)
	}
	groups[name] = g
	return g
}

// newGroupHook, if non-nil, is called right after a new group is created.
var newGroupHook func(*Group)