Golang FileDecorations.Decoration方法代码示例

func writeDecorations(ctx context.Context, t table.Proto, entries <-chan *spb.Entry) error {
	fragments, err := createFragmentsTable(ctx, entries)
	if err != nil {
		return fmt.Errorf("error creating fragments table: %v", err)
	}
	defer fragments.Close(ctx)

	it, err := fragments.ScanPrefix(nil, &keyvalue.Options{LargeRead: true})
	if err != nil {
		return err
	}
	defer it.Close()

	log.Println("Writing Decorations")

	var curFile string
	var decor *srvpb.FileDecorations
	for {
		k, v, err := it.Next()
		if err == io.EOF {
			break
		} else if err != nil {
			return fmt.Errorf("error scanning temporary table: %v", err)
		}

		ss := strings.Split(string(k), tempTableKeySep)
		if len(ss) != 2 {
			return fmt.Errorf("invalid temporary table key: %q", string(k))
		}
		fileTicket := ss[0]

		if decor != nil && curFile != fileTicket {
			if decor.FileTicket != "" {
				if err := writeDecor(ctx, t, decor); err != nil {
					return err
				}
			}
			decor = nil
		}
		curFile = fileTicket
		if decor == nil {
			decor = &srvpb.FileDecorations{}
		}

		var fragment srvpb.FileDecorations
		if err := proto.Unmarshal(v, &fragment); err != nil {
			return fmt.Errorf("invalid temporary table value: %v", err)
		}

		if fragment.FileTicket == "" {
			decor.Decoration = append(decor.Decoration, fragment.Decoration...)
		} else {
			decor.FileTicket = fragment.FileTicket
			decor.SourceText = fragment.SourceText
			decor.Encoding = fragment.Encoding
		}
	}

	if decor != nil && decor.FileTicket != "" {
		if err := writeDecor(ctx, t, decor); err != nil {
			return err
		}
	}

	return nil
}

func writeDecorAndRefs(ctx context.Context, opts *Options, edges <-chan *srvpb.Edge, out *servingOutput) error {
	fragments, err := opts.diskSorter(fragmentLesser{}, fragmentMarshaler{})
	if err != nil {
		return err
	}

	log.Println("Writing decoration fragments")
	if err := createDecorationFragments(ctx, edges, fragments); err != nil {
		return err
	}

	log.Println("Writing completed FileDecorations")

	// refSorter stores a *srvpb.CrossReference for each Decoration from fragments
	refSorter, err := opts.diskSorter(refLesser{}, refMarshaler{})
	if err != nil {
		return fmt.Errorf("error creating sorter: %v", err)
	}

	buffer := out.xs.Buffered()
	var (
		curFile string
		file    *srvpb.File
		norm    *xrefs.Normalizer
		decor   *srvpb.FileDecorations
	)
	if err := fragments.Read(func(x interface{}) error {
		df := x.(*decorationFragment)
		fileTicket := df.fileTicket
		fragment := df.decoration

		if decor != nil && curFile != fileTicket {
			if decor.File != nil {
				if err := writeDecor(ctx, buffer, decor); err != nil {
					return err
				}
				file = nil
			}
			decor = nil
		}
		curFile = fileTicket
		if decor == nil {
			decor = &srvpb.FileDecorations{}
		}

		if fragment.File == nil {
			decor.Decoration = append(decor.Decoration, fragment.Decoration...)
			if file == nil {
				return errors.New("missing file for anchors")
			}

			// Reverse each fragment.Decoration to create a *srvpb.CrossReference
			for _, d := range fragment.Decoration {
				cr, err := assemble.CrossReference(file, norm, d)
				if err != nil {
					return fmt.Errorf("error assembling cross-reference: %v", err)
				}
				if err := refSorter.Add(cr); err != nil {
					return fmt.Errorf("error adding CrossReference to sorter: %v", err)
				}
			}
		} else {
			decor.File = fragment.File
			file = fragment.File
			norm = xrefs.NewNormalizer(file.Text)
		}

		return nil
	}); err != nil {
		return fmt.Errorf("error reading decoration fragments: %v", err)
	}

	if decor != nil && decor.File != nil {
		if err := writeDecor(ctx, buffer, decor); err != nil {
			return err
		}
	}

	log.Println("Writing CrossReferences")

	xb := &assemble.CrossReferencesBuilder{
		MaxPageSize: opts.MaxPageSize,
		Output: func(ctx context.Context, s *srvpb.PagedCrossReferences) error {
			return buffer.Put(ctx, xsrv.CrossReferencesKey(s.SourceTicket), s)
		},
		OutputPage: func(ctx context.Context, p *srvpb.PagedCrossReferences_Page) error {
			return buffer.Put(ctx, xsrv.CrossReferencesPageKey(p.PageKey), p)
		},
	}
	var curTicket string
	if err := refSorter.Read(func(i interface{}) error {
		cr := i.(*srvpb.CrossReference)

		if curTicket != cr.Referent.Ticket {
			curTicket = cr.Referent.Ticket
			if err := xb.StartSet(ctx, curTicket); err != nil {
				return fmt.Errorf("error starting cross-references set: %v", err)
			}
		}

//.........这里部分代码省略.........

func writeFileDecorations(ctx context.Context, edges <-chan *srvpb.Edge, out *servingOutput) error {
	temp, err := tempTable("decor.fragments")
	if err != nil {
		return fmt.Errorf("failed to create temporary table: %v", err)
	}
	fragments := &table.KVProto{temp}
	defer func() {
		if err := fragments.Close(ctx); err != nil {
			log.Printf("Error closing fragments table: %v", err)
		}
	}()

	log.Println("Writing decoration fragments")
	if err := createDecorationFragments(ctx, edges, fragments); err != nil {
		return err
	}

	log.Println("Writing completed FileDecorations")

	it, err := fragments.ScanPrefix(nil, &keyvalue.Options{LargeRead: true})
	if err != nil {
		return err
	}
	defer it.Close()

	log.Println("Writing Decorations")

	var curFile string
	var decor *srvpb.FileDecorations
	var fragment srvpb.FileDecorations
	for {
		k, v, err := it.Next()
		if err == io.EOF {
			break
		} else if err != nil {
			return fmt.Errorf("error scanning temporary table: %v", err)
		}

		ss := strings.Split(string(k), tempTableKeySep)
		if len(ss) != 2 {
			return fmt.Errorf("invalid temporary table key: %q", string(k))
		}
		fileTicket := ss[0]

		if decor != nil && curFile != fileTicket {
			if decor.FileTicket != "" {
				if err := writeDecor(ctx, out.xs, decor); err != nil {
					return err
				}
			}
			decor = nil
		}
		curFile = fileTicket
		if decor == nil {
			decor = &srvpb.FileDecorations{}
		}

		if err := proto.Unmarshal(v, &fragment); err != nil {
			return fmt.Errorf("invalid temporary table value: %v", err)
		}

		if fragment.FileTicket == "" {
			decor.Decoration = append(decor.Decoration, fragment.Decoration...)
		} else {
			decor.FileTicket = fragment.FileTicket
			decor.SourceText = fragment.SourceText
			decor.Encoding = fragment.Encoding
		}
	}

	if decor != nil && decor.FileTicket != "" {
		if err := writeDecor(ctx, out.xs, decor); err != nil {
			return err
		}
	}

	return nil
}