Esempio n. 1
0
func (b GraphBuilderCentralized) Rcv(msg bh.Msg, ctx bh.RcvContext) error {
	dict := ctx.Dict(GraphDict)
	var link nom.Link
	switch dm := msg.Data().(type) {
	case nom.LinkAdded:
		link = nom.Link(dm)
	case nom.LinkDeleted:
		link = nom.Link(dm)
	default:
		return fmt.Errorf("GraphBuilderCentralized: unsupported message type %v",
			msg.Type())
	}

	nf, _ := nom.ParsePortUID(link.From)
	nt, _ := nom.ParsePortUID(link.To)

	if nf == nt {
		return fmt.Errorf("%v is a loop", link)
	}

	k := string(nf)
	links := make(map[nom.UID][]nom.Link)
	if v, err := dict.Get(k); err == nil {
		links = v.(map[nom.UID][]nom.Link)
	}
	links[nt.UID()] = append(links[nt.UID()], link)
	return dict.Put(k, links)
}
Esempio n. 2
0
func (h *newLinkHandler) Rcv(msg bh.Msg, ctx bh.RcvContext) error {
	l := nom.Link(msg.Data().(NewLink))
	n, _ := nom.ParsePortUID(l.From)
	d := ctx.Dict(nodeDict)
	k := string(n)
	v, err := d.Get(k)
	if err != nil {
		return err
	}
	np := v.(nodePortsAndLinks)

	if oldl, ok := np.linkFrom(l.From); ok {
		if oldl.UID() == l.UID() {
			return nil
		}
		np.removeLink(oldl)
		ctx.Emit(nom.LinkDeleted(oldl))
	}

	glog.V(2).Infof("Link detected %v", l)
	ctx.Emit(nom.LinkAdded(l))
	np.L = append(np.L, l)
	return d.Put(k, np)
}