func lookupPagedEdgeSets(ctx context.Context, tbl table.ProtoBatch, keys [][]byte) (<-chan edgeSetResult, error) {
rs, err := tbl.LookupBatch(ctx, keys, (*srvpb.PagedEdgeSet)(nil))
if err != nil {
return nil, err
}
ch := make(chan edgeSetResult)
go func() {
defer close(ch)
for r := range rs {
if r.Err == table.ErrNoSuchKey {
log.Printf("Could not locate edges with key %q", r.Key)
ch <- edgeSetResult{Err: r.Err}
continue
} else if r.Err != nil {
ticket := strings.TrimPrefix(string(r.Key), edgeSetsTablePrefix)
ch <- edgeSetResult{
Err: fmt.Errorf("edges lookup error (ticket %q): %v", ticket, r.Err),
}
continue
}
ch <- edgeSetResult{PagedEdgeSet: r.Value.(*srvpb.PagedEdgeSet)}
}
}()
return ch, nil
}
func lookupNodes(ctx context.Context, tbl table.ProtoBatch, keys [][]byte) (<-chan nodeResult, error) {
rs, err := tbl.LookupBatch(ctx, keys, (*srvpb.Node)(nil))
if err != nil {
return nil, err
}
ch := make(chan nodeResult)
go func() {
defer close(ch)
for r := range rs {
if r.Err == table.ErrNoSuchKey {
log.Printf("Could not locate node with key %q", r.Key)
ch <- nodeResult{Err: r.Err}
continue
} else if r.Err != nil {
ticket := strings.TrimPrefix(string(r.Key), nodesTablePrefix)
ch <- nodeResult{
Err: fmt.Errorf("lookup error for node %q: %v", ticket, r.Err),
}
continue
}
ch <- nodeResult{Node: r.Value.(*srvpb.Node)}
}
}()
return ch, nil
}