Esempio n. 1
0
// UpdateTabletEndpoints fixes up any entries in the serving graph that relate
// to a given tablet.
func UpdateTabletEndpoints(ctx context.Context, ts topo.Server, tablet *topo.Tablet) (err error) {
	if *lockSrvShard {
		// This lock is only necessary until all tablets are upgraded to lock-free.
		actionNode := actionnode.RebuildSrvShard()
		lockPath, err := actionNode.LockSrvShard(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard)
		if err != nil {
			return fmt.Errorf("can't lock shard for UpdateTabletEndpoints(%v): %v", tablet, err)
		}

		defer func() {
			actionNode.UnlockSrvShard(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard, lockPath, err)
		}()
	}

	srvTypes, err := ts.GetSrvTabletTypesPerShard(ctx, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard)
	if err != nil {
		if err != topo.ErrNoNode {
			return err
		}
		// It's fine if there are no existing types.
		srvTypes = nil
	}

	wg := sync.WaitGroup{}
	errs := concurrency.AllErrorRecorder{}

	// Update the list that the tablet is supposed to be in (if any).
	if tablet.IsInServingGraph() {
		endpoint, err := tablet.EndPoint()
		if err != nil {
			return err
		}

		wg.Add(1)
		go func() {
			defer wg.Done()
			errs.RecordError(
				updateEndpoint(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard,
					tablet.Type, endpoint))
		}()
	}

	// Remove it from any other lists it isn't supposed to be in.
	for _, srvType := range srvTypes {
		if srvType != tablet.Type {
			wg.Add(1)
			go func(tabletType topo.TabletType) {
				defer wg.Done()
				errs.RecordError(
					removeEndpoint(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard,
						tabletType, tablet.Alias.Uid))
			}(srvType)
		}
	}

	wg.Wait()
	return errs.Error()
}
Esempio n. 2
0
// UpdateTabletEndpoints fixes up any entries in the serving graph that relate
// to a given tablet.
func UpdateTabletEndpoints(ctx context.Context, ts topo.Server, tablet *topo.Tablet) (err error) {
	srvTypes, err := ts.GetSrvTabletTypesPerShard(ctx, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard)
	if err != nil {
		if err != topo.ErrNoNode {
			return err
		}
		// It's fine if there are no existing types.
		srvTypes = nil
	}

	wg := sync.WaitGroup{}
	errs := concurrency.AllErrorRecorder{}

	// Update the list that the tablet is supposed to be in (if any).
	if tablet.IsInServingGraph() {
		endpoint, err := tablet.EndPoint()
		if err != nil {
			return err
		}

		wg.Add(1)
		go func() {
			defer wg.Done()
			errs.RecordError(
				updateEndpoint(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard,
					tablet.Type, endpoint))
		}()
	}

	// Remove it from any other lists it isn't supposed to be in.
	for _, srvType := range srvTypes {
		if srvType != tablet.Type {
			wg.Add(1)
			go func(tabletType topo.TabletType) {
				defer wg.Done()
				errs.RecordError(
					removeEndpoint(ctx, ts, tablet.Alias.Cell, tablet.Keyspace, tablet.Shard,
						tabletType, tablet.Alias.Uid))
			}(srvType)
		}
	}

	wg.Wait()
	return errs.Error()
}