Ejemplo n.º 1
0
// fetchAllServicesAndUnits returns a map from service name to service,
// a map from service name to unit name to unit, and a map from base charm URL to latest URL.
func fetchAllServicesAndUnits(
	st *state.State, unitMatcher unitMatcher) (
	map[string]*state.Service, map[string]map[string]*state.Unit, map[charm.URL]string, error) {

	svcMap := make(map[string]*state.Service)
	unitMap := make(map[string]map[string]*state.Unit)
	latestCharms := make(map[charm.URL]string)
	services, err := st.AllServices()
	if err != nil {
		return nil, nil, nil, err
	}
	for _, s := range services {
		units, err := s.AllUnits()
		if err != nil {
			return nil, nil, nil, err
		}
		svcUnitMap := make(map[string]*state.Unit)
		for _, u := range units {
			if !unitMatcher.matchUnit(u) {
				continue
			}
			svcUnitMap[u.Name()] = u
		}
		if unitMatcher.matchesAny() || len(svcUnitMap) > 0 {
			unitMap[s.Name()] = svcUnitMap
			svcMap[s.Name()] = s
			// Record the base URL for the service's charm so that
			// the latest store revision can be looked up.
			charmURL, _ := s.CharmURL()
			if charmURL.Schema == "cs" {
				latestCharms[*charmURL.WithRevision(-1)] = ""
			}
		}
	}
	for baseURL, _ := range latestCharms {
		ch, err := st.LatestPlaceholderCharm(&baseURL)
		if errors.IsNotFound(err) {
			continue
		}
		if err != nil {
			return nil, nil, nil, err
		}
		latestCharms[baseURL] = ch.String()
	}
	return svcMap, unitMap, latestCharms, nil
}