Esempio n. 1
0
func (r *fakeRouter) CreateRoute(route *router.Route) error {
	r.mtx.Lock()
	defer r.mtx.Unlock()
	route.ID = route.Type + "/" + postgres.FormatUUID(random.UUID())
	now := time.Now()
	route.CreatedAt = now
	route.UpdatedAt = now
	r.routes[route.ID] = route
	return nil
}
Esempio n. 2
0
func streamJobs(ctx context.Context, req *http.Request, w http.ResponseWriter, app *ct.App, repo *JobRepo) (err error) {
	var lastID int64
	if req.Header.Get("Last-Event-Id") != "" {
		lastID, err = strconv.ParseInt(req.Header.Get("Last-Event-Id"), 10, 64)
		if err != nil {
			return ct.ValidationError{Field: "Last-Event-Id", Message: "is invalid"}
		}
	}
	var count int
	if req.FormValue("count") != "" {
		count, err = strconv.Atoi(req.FormValue("count"))
		if err != nil {
			return ct.ValidationError{Field: "count", Message: "is invalid"}
		}
	}

	ch := make(chan *ct.JobEvent)
	l, _ := ctxhelper.LoggerFromContext(ctx)
	s := sse.NewStream(w, ch, l)
	s.Serve()

	connected := make(chan struct{})
	done := make(chan struct{})
	listenEvent := func(ev pq.ListenerEventType, listenErr error) {
		switch ev {
		case pq.ListenerEventConnected:
			close(connected)
		case pq.ListenerEventDisconnected:
			if done != nil {
				close(done)
				done = nil
			}
		case pq.ListenerEventConnectionAttemptFailed:
			err = listenErr
			if done != nil {
				close(done)
				done = nil
			}
		}
	}
	listener := pq.NewListener(repo.db.DSN(), 10*time.Second, time.Minute, listenEvent)
	defer listener.Close()
	listener.Listen("job_events:" + postgres.FormatUUID(app.ID))

	var currID int64
	if lastID > 0 || count > 0 {
		events, err := repo.listEvents(app.ID, lastID, count)
		if err != nil {
			return err
		}
		// events are in ID DESC order, so iterate in reverse
		for i := len(events) - 1; i >= 0; i-- {
			e := events[i]
			ch <- e
			currID = e.ID
		}
	}

	select {
	case <-done:
		return
	case <-connected:
	}

	for {
		select {
		case <-s.Done:
			return
		case <-done:
			return
		case n := <-listener.Notify:
			id, err := strconv.ParseInt(n.Extra, 10, 64)
			if err != nil {
				return err
			}
			if id <= currID {
				continue
			}
			e, err := repo.getEvent(id)
			if err != nil {
				return err
			}
			ch <- e
		}
	}
}