Пример #1
0
// Retrieves a directory in one go.
// Also used to check existence; returning ds.ErrNoSuchEntity
func (fs *dsFileSys) dirByPath(name string) (DsDir, error) {

	dir, bname := fs.SplitX(name)

	fo := DsDir{}
	fo.fSys = fs

	preciseK := ds.NewKey(fs.c, tdir, dir+common.Filify(bname), 0, nil)
	fo.Key = preciseK

	err := fo.MemCacheGet(dir + common.Filify(bname))
	if err == nil {
		fo.fSys = fs
		fo.Key = preciseK
		// log.Printf("  mcg %-16v %v", dir+bname, fo.Key)
		return fo, nil
	}

	err = ds.Get(fs.c, preciseK, &fo)
	if err == ds.ErrNoSuchEntity {
		// uncomment to see where directories do not exist:
		// log.Printf("no directory: %-20v ", path)
		// runtimepb.StackTrace(4)
		return fo, err
	} else if err != nil {
		aelog.Errorf(fs.Ctx(), "Error getting dir %v => %v", dir+common.Filify(bname), err)
	}

	fo.MemCacheSet()
	return fo, err
}
Пример #2
0
func (fs *dsFileSys) saveDirByPathExt(dirObj DsDir, name string) (DsDir, error) {

	fo := DsDir{}
	fo.isDir = true
	fo.MModTime = dirObj.MModTime

	if dirObj.MMode == 0 {
		fo.MMode = 0755
	} else {
		fo.MMode = dirObj.MMode
	}

	if dirObj.MModTime.IsZero() {
		fo.MModTime = time.Now()
	} else {
		fo.MModTime = dirObj.MModTime
	}

	fo.fSys = fs

	dir, bname := fs.SplitX(name)
	fo.Dir = dir
	fo.BName = common.Filify(bname)

	preciseK := ds.NewKey(fs.c, tdir, dir+common.Filify(bname), 0, nil)
	fo.Key = preciseK

	// fs.Ctx().Infof("Saving dir %-14q  %q  %v ", fo.Dir, fo.BName, fo.Key)

	effKey, err := ds.Put(fs.c, preciseK, &fo)
	if err != nil {
		aelog.Errorf(fs.Ctx(), "Error saving dir %v => %v", dir+bname, err)
		return fo, err
	}

	if !preciseK.Equal(effKey) {
		aelog.Errorf(fs.Ctx(), "dir keys unequal %v - %v", preciseK, effKey)
	}

	fo.MemCacheSet()

	// recurse upwards
	_, err = fs.dirByPath(fo.Dir)
	if err == ds.ErrNoSuchEntity {
		_, err = fs.saveDirByPath(fo.Dir)
		if err != nil {
			return fo, err
		}
	}

	return fo, nil
}
Пример #3
0
// similar to ReadDir but returning only files
func (fs *dsFileSys) filesByPath(name string) ([]DsFile, error) {

	dir, bname := fs.SplitX(name)

	var files []DsFile

	foDir, err := fs.dirByPath(dir + common.Filify(bname))
	if err == datastore.ErrNoSuchEntity {
		return files, err
	} else if err != nil {
		aelog.Errorf(fs.Ctx(), "Error reading dir for files %v => %v", dir+bname, err)
		return files, err
	}

	// fs.Ctx().Infof("  Files by Path %-20v - got dir %-10v - %v", dir+bname, foDir.Name(), foDir.Key)

	q := datastore.NewQuery(tfil).Ancestor(foDir.Key)
	keys, err := q.GetAll(fs.Ctx(), &files)
	if err != nil {
		aelog.Errorf(fs.Ctx(), "Error fetching files children of %v => %v", foDir.Key, err)
		return files, err
	}

	// fs.Ctx().Infof("  Files by Path %-20v - got files %v", dir+bname, len(files))

	for i := 0; i < len(files); i++ {
		files[i].Key = keys[i]
		files[i].fSys = fs
	}

	fs.filesorter(files)

	return files, err
}
Пример #4
0
// subtreeByPath retrieves a subdirectories of a given directory.
// It is relying on an indexed string property "Dir"
// containing a string representation of the full path.
//
// It might be fast for deep, uncached directory subtree,
// that have been saved in nested manner.
//
// However, it might not find recently added directories.
// Upon finding nothing, it therefore returns the
// "warning" fsi.EmptyQueryResult
//
// The func could easily be enhanced chunked scanning.
//
// It is currently used by ReadDir and by the test package.
// It is public for the test package.
func (fs *dsFileSys) SubtreeByPath(name string, onlyDirectChildren bool) ([]DsDir, error) {

	dir, bname := fs.SplitX(name)
	name = dir + common.Filify(bname)
	if !strings.HasSuffix(name, sep) {
		name += sep
	}

	var q *datastore.Query

	if onlyDirectChildren {
		q = datastore.NewQuery(tdir).
			Filter("Dir=", name).
			Order("Dir")
		//  Limit(4)
	} else {
		pathInc := IncrementString(name)
		q = datastore.NewQuery(tdir).
			Filter("Dir>=", name).
			Filter("Dir<", pathInc).
			Order("Dir")
	}

	// log.Printf("%v", q)

	var children []DsDir
	keys, err := q.GetAll(fs.Ctx(), &children)
	if err != nil {
		aelog.Errorf(fs.Ctx(), "Error getting all children of %v => %v", dir+bname, err)
		return children, err
	}

	if len(children) < 1 {
		return children, fsi.EmptyQueryResult
	}

	// Very evil: We filter out root node, since it's
	// has the same dir as the level-1 directories.
	keyRoot := datastore.NewKey(fs.Ctx(), tdir, fs.RootDir(), 0, nil)
	idxRoot := -1

	for i := 0; i < len(children); i++ {
		children[i].fSys = fs
		children[i].Key = keys[i]
		if keys[i].Equal(keyRoot) {
			// log.Printf("root idx %v", i)
			idxRoot = i
		}
	}

	if idxRoot > -1 {
		children = append(children[:idxRoot], children[idxRoot+1:]...)
	}

	return children, nil

}
Пример #5
0
func (m *memMapFs) Open(name string) (fsi.File, error) {

	origName := name

	dir, bname := m.SplitX(name)
	name = dir + bname // not join, since it removes trailing slash

	name1 := name
	name2 := name
	if strings.HasSuffix(name, "/") {
		// explicitly asked for dir
		name2 = common.Filify(name)
	} else {
		// try file first, then try the directory
		name2 = common.Directorify(name)
	}

	m.rlock()
	f, ok := m.fos[name1]
	if !ok {
		f, ok = m.fos[name2]
	}
	if ok {
		ff, okConv := f.(*InMemoryFile)
		if okConv {
			ff.Open()
		} else {
			return nil, fmt.Errorf("could not convert opened file into InMemoryFile 1")
		}
	}
	m.runlock()

	//
	//
	// Fallback to underlying fs
	if !ok {
		var err error
		f, err = m.lookupUnderlyingFS(name, origName)
		if err != nil {
			// log.Printf("underlying says  %q => %v\n", name, err)
			return nil, err
			return nil, fsi.ErrFileNotFound
		}
		// log.Printf("underlying succ %q\n", name)
		// m.Dump()
		return f, nil
	}

	//
	// Regular return
	if ok {
		return f, nil
	} else {
		return nil, fsi.ErrFileNotFound
	}
}
Пример #6
0
//
//
// Path is the directory, BName contains the base name.
func (fs *dsFileSys) saveFileByPath(f *DsFile, name string) error {

	dir, bname := fs.SplitX(name)
	f.Dir = dir
	// bname was only submitted in the fileobject
	// correct previous
	if f.BName != "" && f.BName != bname {
		dir = dir + bname // re-append
		if !strings.HasSuffix(dir, sep) {
			dir += sep
		}
		bname = f.BName
		f.Dir = dir
	}
	f.BName = common.Filify(bname)

	// f.MModTime = time.Now()
	f.fSys = fs

	//
	// -------------now the datastore part-------------------------

	foDir, err := fs.dirByPath(dir)
	if err == datastore.ErrNoSuchEntity {
		return err
	} else if err != nil {
		aelog.Errorf(fs.Ctx(), "Error reading dir for file %v => %v", dir+bname, err)
		return err
	}

	suggKey := datastore.NewKey(fs.Ctx(), tfil, f.BName, 0, foDir.Key)
	f.Key = suggKey

	effKey, err := datastore.Put(fs.Ctx(), suggKey, f)
	if err != nil {
		aelog.Errorf(fs.Ctx(), "Error saving file %v => %v", dir+bname, err)
		return err
	}
	if !suggKey.Equal(effKey) {
		aelog.Errorf(fs.Ctx(), "file keys unequal %v - %v; %v %s", suggKey, effKey, f.Dir+f.BName, f.Data)
		runtimepb.StackTrace(6)
	}

	// f.MemCacheSet()

	return nil
}
Пример #7
0
// remove f from it's parent's directory
func (m *memMapFs) unRegisterWithParent(name string) error {

	parent, bname := m.SplitX(name)
	name = parent + bname

	pDir, err := m.findParent(name)
	if err != nil {
		return err
	}

	pDirC := pDir.(*InMemoryFile)
	// log.Printf("trying to unregister %-22q in %q - \n\t%+v\n", name, pDirC.name, pDirC.memDir)
	delete(pDirC.memDir, common.Directorify(name))
	delete(pDirC.memDir, common.Filify(name))

	return nil
}
Пример #8
0
// Create opens for read-write.
// Open opens for readonly access.
func (fs *dsFileSys) Create(name string) (fsi.File, error) {

	// WriteFile & Create
	dir, bname := fs.SplitX(name)

	f := DsFile{}
	f.fSys = fs
	f.BName = common.Filify(bname)
	f.Dir = dir
	f.MModTime = time.Now()
	f.MMode = 0644

	// let all the properties by set by fs.saveFileByPath
	err := f.Sync()
	if err != nil {
		return nil, err
	}

	// return &f, nil
	ff := fsi.File(&f)
	return ff, err

}
Пример #9
0
// Only one save operation required
func (fs *dsFileSys) WriteFile(name string, data []byte, perm os.FileMode) error {

	// WriteFile & Create
	dir, bname := fs.SplitX(name)
	f := DsFile{}
	f.Dir = dir
	f.BName = common.Filify(bname)
	f.fSys = fs
	f.MModTime = time.Now()

	var err error
	_, err = f.Write(data)
	if err != nil {
		return err
	}

	err = f.Sync()
	if err != nil {
		return err
	}

	return nil
}