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package filer2
import (
"fmt"
"github.com/karlseguin/ccache"
"strings"
"path/filepath"
"time"
"os"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/glog"
)
type Filer struct {
master string
store FilerStore
directoryCache *ccache.Cache
}
func NewFiler(master string) *Filer {
return &Filer{
master: master,
directoryCache: ccache.New(ccache.Configure().MaxSize(1000).ItemsToPrune(100)),
}
}
func (f *Filer) SetStore(store FilerStore) () {
f.store = store
}
func (f *Filer) DisableDirectoryCache() () {
f.directoryCache = nil
}
func (f *Filer) CreateEntry(entry *Entry) (error) {
dirParts := strings.Split(string(entry.FullPath), "/")
// fmt.Printf("directory parts: %+v\n", dirParts)
var lastDirectoryEntry *Entry
for i := 1; i < len(dirParts); i++ {
dirPath := "/" + filepath.Join(dirParts[:i]...)
// fmt.Printf("%d directory: %+v\n", i, dirPath)
// first check local cache
dirEntry := f.cacheGetDirectory(dirPath)
// not found, check the store directly
if dirEntry == nil {
glog.V(4).Infof("find uncached directory: %s", dirPath)
var dirFindErr error
_, dirEntry, dirFindErr = f.FindEntry(FullPath(dirPath))
if dirFindErr != nil {
return fmt.Errorf("findDirectory %s: %v", dirPath, dirFindErr)
}
} else {
glog.V(4).Infof("found cached directory: %s", dirPath)
}
// no such existing directory
if dirEntry == nil {
// create the directory
now := time.Now()
dirEntry = &Entry{
FullPath: FullPath(dirPath),
Attr: Attr{
Mtime: now,
Crtime: now,
Mode: os.ModeDir | 0660,
Uid: entry.Uid,
Gid: entry.Gid,
},
}
glog.V(2).Infof("create directory: %s", dirPath)
mkdirErr := f.store.InsertEntry(dirEntry)
if mkdirErr != nil {
return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr)
}
}
// cache the directory entry
f.cacheSetDirectory(dirPath, dirEntry, i)
// remember the direct parent directory entry
if i == len(dirParts)-1 {
lastDirectoryEntry = dirEntry
}
}
if lastDirectoryEntry == nil {
return fmt.Errorf("parent folder not found: %v", entry.FullPath)
}
/*
if !hasWritePermission(lastDirectoryEntry, entry) {
glog.V(0).Infof("directory %s: %v, entry: uid=%d gid=%d",
lastDirectoryEntry.FullPath, lastDirectoryEntry.Attr, entry.Uid, entry.Gid)
return fmt.Errorf("no write permission in folder %v", lastDirectoryEntry.FullPath)
}
*/
if err := f.store.InsertEntry(entry); err != nil {
return fmt.Errorf("insert entry %s: %v", entry.FullPath, err)
}
return nil
}
func (f *Filer) AppendFileChunk(p FullPath, chunks []*filer_pb.FileChunk) (err error) {
return f.store.AppendFileChunk(p, chunks)
}
func (f *Filer) FindEntry(p FullPath) (found bool, entry *Entry, err error) {
return f.store.FindEntry(p)
}
func (f *Filer) DeleteEntry(p FullPath) (fileEntry *Entry, err error) {
found, entry, err := f.FindEntry(p)
if err != nil || !found {
return nil, err
}
if entry.IsDirectory() {
entries, err := f.ListDirectoryEntries(p, "", false, 1)
if err != nil {
return nil, fmt.Errorf("list folder %s: %v", p, err)
}
if len(entries) > 0 {
return nil, fmt.Errorf("folder %s is not empty", p)
}
}
return f.store.DeleteEntry(p)
}
func (f *Filer) ListDirectoryEntries(p FullPath, startFileName string, inclusive bool, limit int) ([]*Entry, error) {
if strings.HasSuffix(string(p), "/") && len(p) > 1 {
p = p[0:len(p)-1]
}
return f.store.ListDirectoryEntries(p, startFileName, inclusive, limit)
}
func (f *Filer) cacheGetDirectory(dirpath string) (*Entry) {
if f.directoryCache == nil {
return nil
}
item := f.directoryCache.Get(dirpath)
if item == nil {
return nil
}
return item.Value().(*Entry)
}
func (f *Filer) cacheSetDirectory(dirpath string, dirEntry *Entry, level int) {
if f.directoryCache == nil {
return
}
minutes := 60
if level < 10 {
minutes -= level * 6
}
f.directoryCache.Set(dirpath, dirEntry, time.Duration(minutes)*time.Minute)
}
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