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package filer2
import (
"fmt"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/karlseguin/ccache"
"os"
"path/filepath"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/operation"
)
type Filer struct {
masters []string
store FilerStore
directoryCache *ccache.Cache
currentMaster string
}
func NewFiler(masters []string) *Filer {
return &Filer{
masters: masters,
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)
dirEntry, _ = f.FindEntry(FullPath(dirPath))
} 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 | 0770,
Uid: entry.Uid,
Gid: entry.Gid,
},
}
glog.V(2).Infof("create directory: %s %v", dirPath, dirEntry.Mode)
mkdirErr := f.store.InsertEntry(dirEntry)
if mkdirErr != nil {
return fmt.Errorf("mkdir %s: %v", dirPath, mkdirErr)
}
} else if !dirEntry.IsDirectory() {
return fmt.Errorf("%s is a file", dirPath)
}
// 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)
}
*/
oldEntry, _ := f.FindEntry(entry.FullPath)
if err := f.store.InsertEntry(entry); err != nil {
return fmt.Errorf("insert entry %s: %v", entry.FullPath, err)
}
f.deleteChunks(oldEntry)
return nil
}
func (f *Filer) UpdateEntry(entry *Entry) (err error) {
return f.store.UpdateEntry(entry)
}
func (f *Filer) FindEntry(p FullPath) (entry *Entry, err error) {
return f.store.FindEntry(p)
}
func (f *Filer) DeleteEntryMetaAndData(p FullPath, isRecursive bool, shouldDeleteChunks bool) (err error) {
entry, err := f.FindEntry(p)
if err != nil {
return err
}
if entry.IsDirectory() {
entries, err := f.ListDirectoryEntries(p, "", false, 1)
if err != nil {
return fmt.Errorf("list folder %s: %v", p, err)
}
if isRecursive {
for _, sub := range entries {
f.DeleteEntryMetaAndData(sub.FullPath, isRecursive, shouldDeleteChunks)
}
} else {
if len(entries) > 0 {
return fmt.Errorf("folder %s is not empty", p)
}
}
f.cacheDelDirectory(string(p))
}
if shouldDeleteChunks {
f.deleteChunks(entry)
}
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) cacheDelDirectory(dirpath string) {
if f.directoryCache == nil {
return
}
f.directoryCache.Delete(dirpath)
return
}
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)
}
func (f *Filer) deleteChunks(entry *Entry) {
if entry == nil {
return
}
for _, chunk := range entry.Chunks {
if err := operation.DeleteFile(f.GetMaster(), chunk.FileId, ""); err != nil {
glog.V(0).Infof("deleting file %s: %v", chunk.FileId, err)
}
}
}
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