mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-08-22 01:30:43 +02:00
149 lines
4.1 KiB
Go
149 lines
4.1 KiB
Go
package weed_server
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import (
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"context"
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"fmt"
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"path/filepath"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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func (fs *FilerServer) AtomicRenameEntry(ctx context.Context, req *filer_pb.AtomicRenameEntryRequest) (*filer_pb.AtomicRenameEntryResponse, error) {
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glog.V(1).Infof("AtomicRenameEntry %v", req)
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oldParent := util.FullPath(filepath.ToSlash(req.OldDirectory))
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newParent := util.FullPath(filepath.ToSlash(req.NewDirectory))
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if err := fs.filer.CanRename(oldParent, newParent); err != nil {
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return nil, err
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}
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ctx, err := fs.filer.BeginTransaction(ctx)
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if err != nil {
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return nil, err
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}
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oldEntry, err := fs.filer.FindEntry(ctx, oldParent.Child(req.OldName))
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if err != nil {
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fs.filer.RollbackTransaction(ctx)
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return nil, fmt.Errorf("%s/%s not found: %v", req.OldDirectory, req.OldName, err)
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}
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var events MoveEvents
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moveErr := fs.moveEntry(ctx, oldParent, oldEntry, newParent, req.NewName, &events)
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if moveErr != nil {
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fs.filer.RollbackTransaction(ctx)
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return nil, fmt.Errorf("%s/%s move error: %v", req.OldDirectory, req.OldName, moveErr)
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} else {
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if commitError := fs.filer.CommitTransaction(ctx); commitError != nil {
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fs.filer.RollbackTransaction(ctx)
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return nil, fmt.Errorf("%s/%s move commit error: %v", req.OldDirectory, req.OldName, commitError)
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}
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}
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return &filer_pb.AtomicRenameEntryResponse{}, nil
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}
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func (fs *FilerServer) moveEntry(ctx context.Context, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, events *MoveEvents) error {
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if err := fs.moveSelfEntry(ctx, oldParent, entry, newParent, newName, events, func() error {
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if entry.IsDirectory() {
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if err := fs.moveFolderSubEntries(ctx, oldParent, entry, newParent, newName, events); err != nil {
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return err
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}
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}
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return nil
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}); err != nil {
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return fmt.Errorf("fail to move %s => %s: %v", oldParent.Child(entry.Name()), newParent.Child(newName), err)
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}
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return nil
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}
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func (fs *FilerServer) moveFolderSubEntries(ctx context.Context, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, events *MoveEvents) error {
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currentDirPath := oldParent.Child(entry.Name())
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newDirPath := newParent.Child(newName)
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glog.V(1).Infof("moving folder %s => %s", currentDirPath, newDirPath)
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lastFileName := ""
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includeLastFile := false
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for {
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entries, hasMore, err := fs.filer.ListDirectoryEntries(ctx, currentDirPath, lastFileName, includeLastFile, 1024, "", "")
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if err != nil {
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return err
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}
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// println("found", len(entries), "entries under", currentDirPath)
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for _, item := range entries {
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lastFileName = item.Name()
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// println("processing", lastFileName)
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err := fs.moveEntry(ctx, currentDirPath, item, newDirPath, item.Name(), events)
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if err != nil {
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return err
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}
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}
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if !hasMore {
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break
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}
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}
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return nil
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}
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func (fs *FilerServer) moveSelfEntry(ctx context.Context, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, events *MoveEvents,
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moveFolderSubEntries func() error) error {
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oldPath, newPath := oldParent.Child(entry.Name()), newParent.Child(newName)
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glog.V(1).Infof("moving entry %s => %s", oldPath, newPath)
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if oldPath == newPath {
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glog.V(1).Infof("skip moving entry %s => %s", oldPath, newPath)
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return nil
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}
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// add to new directory
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newEntry := &filer.Entry{
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FullPath: newPath,
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Attr: entry.Attr,
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Chunks: entry.Chunks,
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Extended: entry.Extended,
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Content: entry.Content,
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}
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createErr := fs.filer.CreateEntry(ctx, newEntry, false, false, nil)
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if createErr != nil {
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return createErr
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}
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events.newEntries = append(events.newEntries, newEntry)
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if moveFolderSubEntries != nil {
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if moveChildrenErr := moveFolderSubEntries(); moveChildrenErr != nil {
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return moveChildrenErr
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}
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}
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// delete old entry
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deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false, nil)
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if deleteErr != nil {
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return deleteErr
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}
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events.oldEntries = append(events.oldEntries, entry)
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return nil
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}
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type MoveEvents struct {
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oldEntries []*filer.Entry
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newEntries []*filer.Entry
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}
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