mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-08-25 03:01:15 +02:00
203 lines
5.3 KiB
Go
203 lines
5.3 KiB
Go
package redis
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import (
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"context"
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"fmt"
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"golang.org/x/exp/slices"
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"strings"
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"time"
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"github.com/go-redis/redis/v8"
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"github.com/seaweedfs/seaweedfs/weed/filer"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"github.com/seaweedfs/seaweedfs/weed/util"
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)
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const (
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DIR_LIST_MARKER = "\x00"
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)
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type UniversalRedisStore struct {
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Client redis.UniversalClient
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}
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func (store *UniversalRedisStore) BeginTransaction(ctx context.Context) (context.Context, error) {
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return ctx, nil
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}
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func (store *UniversalRedisStore) CommitTransaction(ctx context.Context) error {
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return nil
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}
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func (store *UniversalRedisStore) RollbackTransaction(ctx context.Context) error {
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return nil
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}
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func (store *UniversalRedisStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
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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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if len(entry.Chunks) > filer.CountEntryChunksForGzip {
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value = util.MaybeGzipData(value)
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}
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_, err = store.Client.Set(ctx, string(entry.FullPath), value, time.Duration(entry.TtlSec)*time.Second).Result()
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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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dir, name := entry.FullPath.DirAndName()
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if name != "" {
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_, err = store.Client.SAdd(ctx, genDirectoryListKey(dir), name).Result()
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if err != nil {
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return fmt.Errorf("persisting %s in parent dir: %v", entry.FullPath, err)
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}
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}
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return nil
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}
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func (store *UniversalRedisStore) 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 *UniversalRedisStore) FindEntry(ctx context.Context, fullpath util.FullPath) (entry *filer.Entry, err error) {
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data, err := store.Client.Get(ctx, string(fullpath)).Result()
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if err == redis.Nil {
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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", 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(util.MaybeDecompressData([]byte(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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return entry, nil
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}
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func (store *UniversalRedisStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) {
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_, err = store.Client.Del(ctx, string(fullpath)).Result()
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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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dir, name := fullpath.DirAndName()
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if name != "" {
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_, err = store.Client.SRem(ctx, genDirectoryListKey(dir), name).Result()
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if err != nil {
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return fmt.Errorf("delete %s in parent dir: %v", fullpath, err)
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}
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}
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return nil
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}
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func (store *UniversalRedisStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
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members, err := store.Client.SMembers(ctx, genDirectoryListKey(string(fullpath))).Result()
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if err != nil {
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return fmt.Errorf("delete folder %s : %v", fullpath, err)
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}
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for _, fileName := range members {
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path := util.NewFullPath(string(fullpath), fileName)
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_, err = store.Client.Del(ctx, string(path)).Result()
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if err != nil {
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return fmt.Errorf("delete %s in parent dir: %v", fullpath, err)
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}
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// not efficient, but need to remove if it is a directory
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store.Client.Del(ctx, genDirectoryListKey(string(path)))
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}
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return nil
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}
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func (store *UniversalRedisStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
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return lastFileName, filer.ErrUnsupportedListDirectoryPrefixed
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}
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func (store *UniversalRedisStore) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
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dirListKey := genDirectoryListKey(string(dirPath))
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members, err := store.Client.SMembers(ctx, dirListKey).Result()
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if err != nil {
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return lastFileName, fmt.Errorf("list %s : %v", dirPath, err)
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}
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// skip
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if startFileName != "" {
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var t []string
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for _, m := range members {
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if strings.Compare(m, startFileName) >= 0 {
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if m == startFileName {
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if includeStartFile {
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t = append(t, m)
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}
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} else {
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t = append(t, m)
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}
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}
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}
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members = t
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}
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// sort
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slices.SortFunc(members, func(a, b string) bool {
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return strings.Compare(a, b) < 0
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})
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// limit
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if limit < int64(len(members)) {
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members = members[:limit]
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}
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// fetch entry meta
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for _, fileName := range members {
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path := util.NewFullPath(string(dirPath), fileName)
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entry, err := store.FindEntry(ctx, path)
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lastFileName = fileName
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if err != nil {
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glog.V(0).Infof("list %s : %v", path, err)
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if err == filer_pb.ErrNotFound {
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continue
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}
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} else {
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if entry.TtlSec > 0 {
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if entry.Attr.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
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store.Client.Del(ctx, string(path)).Result()
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store.Client.SRem(ctx, dirListKey, fileName).Result()
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continue
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}
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}
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if !eachEntryFunc(entry) {
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break
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}
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}
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}
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return lastFileName, err
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}
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func genDirectoryListKey(dir string) (dirList string) {
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return dir + DIR_LIST_MARKER
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}
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func (store *UniversalRedisStore) Shutdown() {
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store.Client.Close()
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}
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