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package weed_server
import (
"context"
"fmt"
"path/filepath"
"github.com/chrislusf/seaweedfs/weed/filer"
"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 *filer.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 *filer.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 *filer.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 := &filer.Entry{
FullPath: newPath,
Attr: entry.Attr,
Chunks: entry.Chunks,
Extended: entry.Extended,
}
createErr := fs.filer.CreateEntry(ctx, newEntry, false, false, nil)
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, nil)
if deleteErr != nil {
return deleteErr
}
events.oldEntries = append(events.oldEntries, entry)
return nil
}
type MoveEvents struct {
oldEntries []*filer.Entry
newEntries []*filer.Entry
}
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