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package weed_server
import ( "context" "fmt" "path/filepath"
"github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/util" )
func (fs *FilerServer) AtomicRenameEntry(ctx context.Context, req *filer_pb.AtomicRenameEntryRequest) (*filer_pb.AtomicRenameEntryResponse, error) {
glog.V(1).Infof("AtomicRenameEntry %v", req)
ctx, err := fs.filer.BeginTransaction(ctx) if err != nil { return nil, err }
oldParent := util.FullPath(filepath.ToSlash(req.OldDirectory))
oldEntry, err := fs.filer.FindEntry(ctx, oldParent.Child(req.OldName)) if err != nil { fs.filer.RollbackTransaction(ctx) return nil, fmt.Errorf("%s/%s not found: %v", req.OldDirectory, req.OldName, err) }
var events MoveEvents moveErr := fs.moveEntry(ctx, oldParent, oldEntry, util.FullPath(filepath.ToSlash(req.NewDirectory)), req.NewName, &events) if moveErr != nil { fs.filer.RollbackTransaction(ctx) return nil, fmt.Errorf("%s/%s move error: %v", req.OldDirectory, req.OldName, moveErr) } else { if commitError := fs.filer.CommitTransaction(ctx); commitError != nil { fs.filer.RollbackTransaction(ctx) return nil, fmt.Errorf("%s/%s move commit error: %v", req.OldDirectory, req.OldName, commitError) } }
return &filer_pb.AtomicRenameEntryResponse{}, nil }
func (fs *FilerServer) moveEntry(ctx context.Context, oldParent util.FullPath, entry *filer2.Entry, newParent util.FullPath, newName string, events *MoveEvents) error {
if err := fs.moveSelfEntry(ctx, oldParent, entry, newParent, newName, events, func() error { if entry.IsDirectory() { if err := fs.moveFolderSubEntries(ctx, oldParent, entry, newParent, newName, events); err != nil { return err } } return nil }); err != nil { return fmt.Errorf("fail to move %s => %s: %v", oldParent.Child(entry.Name()), newParent.Child(newName), err) }
return nil }
func (fs *FilerServer) moveFolderSubEntries(ctx context.Context, oldParent util.FullPath, entry *filer2.Entry, newParent util.FullPath, newName string, events *MoveEvents) error {
currentDirPath := oldParent.Child(entry.Name()) newDirPath := newParent.Child(newName)
glog.V(1).Infof("moving folder %s => %s", currentDirPath, newDirPath)
lastFileName := "" includeLastFile := false for {
entries, err := fs.filer.ListDirectoryEntries(ctx, currentDirPath, lastFileName, includeLastFile, 1024, "") if err != nil { return err }
// println("found", len(entries), "entries under", currentDirPath)
for _, item := range entries { lastFileName = item.Name() // println("processing", lastFileName)
err := fs.moveEntry(ctx, currentDirPath, item, newDirPath, item.Name(), events) if err != nil { return err } } if len(entries) < 1024 { break } } return nil }
func (fs *FilerServer) moveSelfEntry(ctx context.Context, oldParent util.FullPath, entry *filer2.Entry, newParent util.FullPath, newName string, events *MoveEvents, moveFolderSubEntries func() error) error {
oldPath, newPath := oldParent.Child(entry.Name()), newParent.Child(newName)
glog.V(1).Infof("moving entry %s => %s", oldPath, newPath)
if oldPath == newPath { glog.V(1).Infof("skip moving entry %s => %s", oldPath, newPath) return nil }
// add to new directory
newEntry := &filer2.Entry{ FullPath: newPath, Attr: entry.Attr, Chunks: entry.Chunks, } createErr := fs.filer.CreateEntry(ctx, newEntry, false, false) if createErr != nil { return createErr }
events.newEntries = append(events.newEntries, newEntry)
if moveFolderSubEntries != nil { if moveChildrenErr := moveFolderSubEntries(); moveChildrenErr != nil { return moveChildrenErr } }
// delete old entry
deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false) if deleteErr != nil { return deleteErr }
events.oldEntries = append(events.oldEntries, entry)
return nil
}
type MoveEvents struct { oldEntries []*filer2.Entry newEntries []*filer2.Entry }
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