コード例 #1
0
ファイル: service.go プロジェクト: carriercomm/serviced
// AddService adds a service; return error if service already exists
func (f *Facade) AddService(ctx datastore.Context, svc service.Service) error {
	glog.V(2).Infof("Facade.AddService: %+v", svc)
	store := f.serviceStore

	_, err := store.Get(ctx, svc.ID)
	if err != nil && !datastore.IsErrNoSuchEntity(err) {
		return err
	} else if err == nil {
		return fmt.Errorf("error adding service; %v already exists", svc.ID)
	}

	// verify the service with parent ID does not exist with the given name
	if s, err := store.FindChildService(ctx, svc.DeploymentID, svc.ParentServiceID, svc.Name); err != nil {
		glog.Errorf("Could not verify service path for %s: %s", svc.Name, err)
		return err
	} else if s != nil {
		err := fmt.Errorf("service %s found at %s", svc.Name, svc.ParentServiceID)
		glog.Errorf("Cannot create service %s: %s", svc.Name, err)
		return err
	}

	// Strip the database version; we already know this is a create
	svc.DatabaseVersion = 0

	// Save a copy for checking configs later
	svcCopy := svc

	err = store.Put(ctx, &svc)
	if err != nil {
		glog.V(2).Infof("Facade.AddService: %+v", err)
		return err
	}
	glog.V(2).Infof("Facade.AddService: id %+v", svc.ID)

	// Compare the incoming config files to see if there are modifications from
	// the original. If there are, we need to perform an update to add those
	// modifications to the service.
	if svcCopy.OriginalConfigs != nil && !reflect.DeepEqual(svcCopy.OriginalConfigs, svcCopy.ConfigFiles) {
		// Get the current service in order to get the database version. We
		// don't save this because it won't have any of the updated config
		// files, among other things.
		cursvc, err := store.Get(ctx, svc.ID)
		if err != nil {
			glog.V(2).Infof("Facade.AddService: %+v", err)
			return err
		}
		svcCopy.DatabaseVersion = cursvc.DatabaseVersion

		for key, _ := range svcCopy.OriginalConfigs {
			glog.V(2).Infof("Facade.AddService: calling updateService for %s due to OriginalConfigs of %+v", svc.Name, key)
		}
		return f.updateService(ctx, &svcCopy)
	}

	glog.V(2).Infof("Facade.AddService: calling zk.updateService for %s %d ConfigFiles", svc.Name, len(svc.ConfigFiles))
	return zkAPI(f).UpdateService(&svc)
}