Exemplo n.º 1
0
func main() {
	flag.Parse()

	client := etcd.NewClient([]string{etcdServer})

	srvs := &services{
		m: map[string]*service{},
	}
	updates := make(chan *etcd.Response)

	// Perform an initial read of all services.
	res, err := client.Get(servicesPrefix, false, true)
	if err != nil {
		log.Fatalf("Error on initial retrieval: %s", err)
	}
	srvs.update(res.Node)
	srvs.persist()

	// Start watching for updates.
	go func() {
		res, err := client.Watch(servicesPrefix, 0, true, updates, nil)
		if err != nil {
			log.Errorln(err)
		}
		log.Infoln(res)
	}()

	// Apply updates sent on the channel.
	for res := range updates {
		if res.Action == "delete" {
			log.Debugf("delete: %s", res.Node.Key)
			srvs.delete(res.Node)
		} else {
			log.Debugf("%s: %s = %s", res.Action, res.Node.Key, res.Node.Value)
			srvs.update(res.Node)
		}
		srvs.persist()
	}
}
Exemplo n.º 2
0
func main() {
	flag.Parse()

	var (
		client  = etcd.NewClient([]string{*etcdServer})
		srvs    = services{}
		updates = make(chan *etcd.Response)
	)

	// Perform an initial read of all services.
	res, err := client.Get(servicesPrefix, false, true)
	if err != nil {
		log.Fatalf("Error on initial retrieval: %s", err)
	}
	srvs.handle(res.Node, srvs.update)
	srvs.persist()

	// Start watching for updates.
	go func() {
		_, err := client.Watch(servicesPrefix, 0, true, updates, nil)
		if err != nil {
			log.Errorln(err)
		}
	}()

	// Apply updates sent on the channel.
	for res := range updates {
		log.Infoln(res.Action, res.Node.Key, res.Node.Value)

		h := srvs.update
		if res.Action == "delete" {
			h = srvs.delete
		}
		srvs.handle(res.Node, h)
		srvs.persist()
	}
}