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141 lines
3.1 KiB
141 lines
3.1 KiB
package redis
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import (
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/go-redis/redis"
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"sort"
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"strings"
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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) InsertEntry(entry *filer2.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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_, err = store.Client.Set(string(entry.FullPath), value, 0).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(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(entry *filer2.Entry) (err error) {
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return store.InsertEntry(entry)
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}
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func (store *UniversalRedisStore) FindEntry(fullpath filer2.FullPath) (entry *filer2.Entry, err error) {
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data, err := store.Client.Get(string(fullpath)).Result()
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if err == redis.Nil {
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return nil, filer2.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 = &filer2.Entry{
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FullPath: fullpath,
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}
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err = entry.DecodeAttributesAndChunks([]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(fullpath filer2.FullPath) (err error) {
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_, err = store.Client.Del(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(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) ListDirectoryEntries(fullpath filer2.FullPath, startFileName string, inclusive bool,
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limit int) (entries []*filer2.Entry, err error) {
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members, err := store.Client.SMembers(genDirectoryListKey(string(fullpath))).Result()
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if err != nil {
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return nil, fmt.Errorf("list %s : %v", fullpath, 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 inclusive {
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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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sort.Slice(members, func(i, j int) bool {
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return strings.Compare(members[i], members[j]) < 0
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})
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// limit
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if limit < 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 := filer2.NewFullPath(string(fullpath), fileName)
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entry, err := store.FindEntry(path)
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if err != nil {
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glog.V(0).Infof("list %s : %v", path, err)
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} else {
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entries = append(entries, entry)
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}
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}
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return entries, 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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