seaweedfs/go/filer/filer_embedded.go

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package filer
import (
"fmt"
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"path/filepath"
)
type FilerEmbedded struct {
directories *DirectoryManagerInMap
files *FileListInLevelDb
}
func NewFilerEmbedded(dir string) (filer *FilerEmbedded, err error) {
dm, de := NewDirectoryManagerInMap(filepath.Join(dir, "dir.log"))
if de != nil {
return nil, de
}
fl, fe := NewFileListInLevelDb(dir)
if fe != nil {
return nil, fe
}
filer = &FilerEmbedded{
directories: dm,
files: fl,
}
return
}
func (filer *FilerEmbedded) CreateFile(filePath string, fid string) (err error) {
dir, file := filepath.Split(filePath)
dirId, e := filer.directories.MakeDirectory(dir)
if e != nil {
return e
}
return filer.files.CreateFile(dirId, file, fid)
}
func (filer *FilerEmbedded) FindFile(filePath string) (fid string, err error) {
dir, file := filepath.Split(filePath)
dirId, e := filer.directories.FindDirectory(dir)
if e != nil {
return "", e
}
return filer.files.FindFile(dirId, file)
}
func (filer *FilerEmbedded) ListDirectories(dirPath string) (dirs []DirectoryEntry, err error) {
return filer.directories.ListDirectories(dirPath)
}
func (filer *FilerEmbedded) ListFiles(dirPath string, lastFileName string, limit int) (files []FileEntry, err error) {
dirId, e := filer.directories.FindDirectory(dirPath)
if e != nil {
return nil, e
}
return filer.files.ListFiles(dirId, lastFileName, limit), nil
}
func (filer *FilerEmbedded) DeleteDirectory(dirPath string) (err error) {
dirId, e := filer.directories.FindDirectory(dirPath)
if e != nil {
return e
}
if len(filer.files.ListFiles(dirId, "", 1)) > 0 {
return fmt.Errorf("Fail to delete non-empty directory %s!", dirPath)
}
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return filer.directories.DeleteDirectory(dirPath)
}
func (filer *FilerEmbedded) DeleteFile(filePath string) (fid string, err error) {
dir, file := filepath.Split(filePath)
dirId, e := filer.directories.FindDirectory(dir)
if e != nil {
return "", e
}
return filer.files.DeleteFile(dirId, file)
}