rename filer2 to filer
This commit is contained in:
Chris Lu
231
weed/filer/leveldb/leveldb_store.go
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231
weed/filer/leveldb/leveldb_store.go
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@@ -0,0 +1,231 @@
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package leveldb
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import (
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"bytes"
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"context"
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"fmt"
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"github.com/syndtr/goleveldb/leveldb"
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leveldb_errors "github.com/syndtr/goleveldb/leveldb/errors"
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"github.com/syndtr/goleveldb/leveldb/opt"
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leveldb_util "github.com/syndtr/goleveldb/leveldb/util"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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weed_util "github.com/chrislusf/seaweedfs/weed/util"
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)
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const (
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DIR_FILE_SEPARATOR = byte(0x00)
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)
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func init() {
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filer.Stores = append(filer.Stores, &LevelDBStore{})
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}
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type LevelDBStore struct {
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db *leveldb.DB
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}
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func (store *LevelDBStore) GetName() string {
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return "leveldb"
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}
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func (store *LevelDBStore) Initialize(configuration weed_util.Configuration, prefix string) (err error) {
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dir := configuration.GetString(prefix + "dir")
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return store.initialize(dir)
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}
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func (store *LevelDBStore) initialize(dir string) (err error) {
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glog.Infof("filer store dir: %s", dir)
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if err := weed_util.TestFolderWritable(dir); err != nil {
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return fmt.Errorf("Check Level Folder %s Writable: %s", dir, err)
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}
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opts := &opt.Options{
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BlockCacheCapacity: 32 * 1024 * 1024, // default value is 8MiB
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WriteBuffer: 16 * 1024 * 1024, // default value is 4MiB
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CompactionTableSizeMultiplier: 10,
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}
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if store.db, err = leveldb.OpenFile(dir, opts); err != nil {
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if leveldb_errors.IsCorrupted(err) {
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store.db, err = leveldb.RecoverFile(dir, opts)
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}
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if err != nil {
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glog.Infof("filer store open dir %s: %v", dir, err)
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return
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}
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}
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return
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}
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func (store *LevelDBStore) BeginTransaction(ctx context.Context) (context.Context, error) {
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return ctx, nil
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}
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func (store *LevelDBStore) CommitTransaction(ctx context.Context) error {
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return nil
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}
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func (store *LevelDBStore) RollbackTransaction(ctx context.Context) error {
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return nil
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}
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func (store *LevelDBStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
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key := genKey(entry.DirAndName())
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value, err := entry.EncodeAttributesAndChunks()
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if err != nil {
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return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
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}
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err = store.db.Put(key, value, nil)
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if err != nil {
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return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
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}
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// println("saved", entry.FullPath, "chunks", len(entry.Chunks))
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return nil
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}
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func (store *LevelDBStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) {
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return store.InsertEntry(ctx, entry)
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}
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func (store *LevelDBStore) FindEntry(ctx context.Context, fullpath weed_util.FullPath) (entry *filer.Entry, err error) {
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key := genKey(fullpath.DirAndName())
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data, err := store.db.Get(key, nil)
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if err == leveldb.ErrNotFound {
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return nil, filer_pb.ErrNotFound
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}
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if err != nil {
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return nil, fmt.Errorf("get %s : %v", entry.FullPath, err)
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}
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entry = &filer.Entry{
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FullPath: fullpath,
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}
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err = entry.DecodeAttributesAndChunks(data)
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if err != nil {
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return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
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}
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// println("read", entry.FullPath, "chunks", len(entry.Chunks), "data", len(data), string(data))
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return entry, nil
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}
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func (store *LevelDBStore) DeleteEntry(ctx context.Context, fullpath weed_util.FullPath) (err error) {
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key := genKey(fullpath.DirAndName())
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err = store.db.Delete(key, nil)
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if err != nil {
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return fmt.Errorf("delete %s : %v", fullpath, err)
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}
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return nil
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}
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func (store *LevelDBStore) DeleteFolderChildren(ctx context.Context, fullpath weed_util.FullPath) (err error) {
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batch := new(leveldb.Batch)
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directoryPrefix := genDirectoryKeyPrefix(fullpath, "")
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iter := store.db.NewIterator(&leveldb_util.Range{Start: directoryPrefix}, nil)
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for iter.Next() {
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key := iter.Key()
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if !bytes.HasPrefix(key, directoryPrefix) {
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break
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}
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fileName := getNameFromKey(key)
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if fileName == "" {
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continue
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}
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batch.Delete([]byte(genKey(string(fullpath), fileName)))
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}
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iter.Release()
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err = store.db.Write(batch, nil)
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if err != nil {
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return fmt.Errorf("delete %s : %v", fullpath, err)
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}
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return nil
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}
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func (store *LevelDBStore) ListDirectoryPrefixedEntries(ctx context.Context, fullpath weed_util.FullPath, startFileName string, inclusive bool, limit int, prefix string) (entries []*filer.Entry, err error) {
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return nil, filer.ErrUnsupportedListDirectoryPrefixed
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}
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func (store *LevelDBStore) ListDirectoryEntries(ctx context.Context, fullpath weed_util.FullPath, startFileName string, inclusive bool,
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limit int) (entries []*filer.Entry, err error) {
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directoryPrefix := genDirectoryKeyPrefix(fullpath, "")
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iter := store.db.NewIterator(&leveldb_util.Range{Start: genDirectoryKeyPrefix(fullpath, startFileName)}, nil)
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for iter.Next() {
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key := iter.Key()
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if !bytes.HasPrefix(key, directoryPrefix) {
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break
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}
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fileName := getNameFromKey(key)
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if fileName == "" {
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continue
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}
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if fileName == startFileName && !inclusive {
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continue
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}
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limit--
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if limit < 0 {
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break
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}
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entry := &filer.Entry{
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FullPath: weed_util.NewFullPath(string(fullpath), fileName),
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}
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if decodeErr := entry.DecodeAttributesAndChunks(iter.Value()); decodeErr != nil {
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err = decodeErr
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glog.V(0).Infof("list %s : %v", entry.FullPath, err)
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break
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}
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entries = append(entries, entry)
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}
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iter.Release()
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return entries, err
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}
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func genKey(dirPath, fileName string) (key []byte) {
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key = []byte(dirPath)
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key = append(key, DIR_FILE_SEPARATOR)
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key = append(key, []byte(fileName)...)
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return key
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}
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func genDirectoryKeyPrefix(fullpath weed_util.FullPath, startFileName string) (keyPrefix []byte) {
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keyPrefix = []byte(string(fullpath))
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keyPrefix = append(keyPrefix, DIR_FILE_SEPARATOR)
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if len(startFileName) > 0 {
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keyPrefix = append(keyPrefix, []byte(startFileName)...)
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}
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return keyPrefix
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}
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func getNameFromKey(key []byte) string {
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sepIndex := len(key) - 1
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for sepIndex >= 0 && key[sepIndex] != DIR_FILE_SEPARATOR {
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sepIndex--
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}
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return string(key[sepIndex+1:])
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}
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func (store *LevelDBStore) Shutdown() {
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store.db.Close()
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}
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88
weed/filer/leveldb/leveldb_store_test.go
Normal file
88
weed/filer/leveldb/leveldb_store_test.go
Normal file
@@ -0,0 +1,88 @@
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package leveldb
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import (
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"context"
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"io/ioutil"
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"os"
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"testing"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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func TestCreateAndFind(t *testing.T) {
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filer := filer.NewFiler(nil, nil, "", 0, "", "", nil)
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dir, _ := ioutil.TempDir("", "seaweedfs_filer_test")
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defer os.RemoveAll(dir)
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store := &LevelDBStore{}
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store.initialize(dir)
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filer.SetStore(store)
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fullpath := util.FullPath("/home/chris/this/is/one/file1.jpg")
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ctx := context.Background()
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entry1 := &filer.Entry{
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FullPath: fullpath,
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Attr: filer.Attr{
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Mode: 0440,
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Uid: 1234,
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Gid: 5678,
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},
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}
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if err := filer.CreateEntry(ctx, entry1, false, false, nil); err != nil {
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t.Errorf("create entry %v: %v", entry1.FullPath, err)
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return
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}
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entry, err := filer.FindEntry(ctx, fullpath)
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if err != nil {
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t.Errorf("find entry: %v", err)
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return
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}
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if entry.FullPath != entry1.FullPath {
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t.Errorf("find wrong entry: %v", entry.FullPath)
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return
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}
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// checking one upper directory
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entries, _ := filer.ListDirectoryEntries(ctx, util.FullPath("/home/chris/this/is/one"), "", false, 100, "")
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if len(entries) != 1 {
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t.Errorf("list entries count: %v", len(entries))
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return
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}
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// checking one upper directory
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entries, _ = filer.ListDirectoryEntries(ctx, util.FullPath("/"), "", false, 100, "")
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if len(entries) != 1 {
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t.Errorf("list entries count: %v", len(entries))
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return
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}
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}
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func TestEmptyRoot(t *testing.T) {
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filer := filer.NewFiler(nil, nil, "", 0, "", "", nil)
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dir, _ := ioutil.TempDir("", "seaweedfs_filer_test2")
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defer os.RemoveAll(dir)
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store := &LevelDBStore{}
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store.initialize(dir)
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filer.SetStore(store)
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ctx := context.Background()
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// checking one upper directory
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entries, err := filer.ListDirectoryEntries(ctx, util.FullPath("/"), "", false, 100, "")
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if err != nil {
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t.Errorf("list entries: %v", err)
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return
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}
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if len(entries) != 0 {
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t.Errorf("list entries count: %v", len(entries))
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return
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}
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}
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Reference in New Issue
Block a user