package redis import ( "fmt" "github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/go-redis/redis" "sort" "strings" ) const ( DIR_LIST_MARKER = "\x00" ) func init() { filer2.Stores = append(filer2.Stores, &RedisStore{}) } type RedisStore struct { Client *redis.Client } func (store *RedisStore) GetName() string { return "redis" } func (store *RedisStore) Initialize(configuration filer2.Configuration) (err error) { return store.initialize( configuration.GetString("address"), configuration.GetString("password"), configuration.GetInt("database"), ) } func (store *RedisStore) initialize(hostPort string, password string, database int) (err error) { store.Client = redis.NewClient(&redis.Options{ Addr: hostPort, Password: password, DB: database, }) return } func (store *RedisStore) InsertEntry(entry *filer2.Entry) (err error) { value, err := entry.EncodeAttributesAndChunks() if err != nil { return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err) } _, err = store.Client.Set(string(entry.FullPath), value, 0).Result() if err != nil { return fmt.Errorf("persisting %s : %v", entry.FullPath, err) } dir, name := entry.FullPath.DirAndName() if name != "" { _, err = store.Client.SAdd(genDirectoryListKey(dir), name).Result() if err != nil { return fmt.Errorf("persisting %s in parent dir: %v", entry.FullPath, err) } } return nil } func (store *RedisStore) UpdateEntry(entry *filer2.Entry) (err error) { return store.InsertEntry(entry) } func (store *RedisStore) FindEntry(fullpath filer2.FullPath) (entry *filer2.Entry, err error) { data, err := store.Client.Get(string(fullpath)).Result() if err == redis.Nil { return nil, filer2.ErrNotFound } if err != nil { return nil, fmt.Errorf("get %s : %v", entry.FullPath, err) } entry = &filer2.Entry{ FullPath: fullpath, } err = entry.DecodeAttributesAndChunks([]byte(data)) if err != nil { return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err) } return entry, nil } func (store *RedisStore) DeleteEntry(fullpath filer2.FullPath) (err error) { _, err = store.Client.Del(string(fullpath)).Result() if err != nil { return fmt.Errorf("delete %s : %v", fullpath, err) } dir, name := fullpath.DirAndName() if name != "" { _, err = store.Client.SRem(genDirectoryListKey(dir), name).Result() if err != nil { return fmt.Errorf("delete %s in parent dir: %v", fullpath, err) } } return nil } func (store *RedisStore) ListDirectoryEntries(fullpath filer2.FullPath, startFileName string, inclusive bool, limit int) (entries []*filer2.Entry, err error) { members, err := store.Client.SMembers(genDirectoryListKey(string(fullpath))).Result() if err != nil { return nil, fmt.Errorf("list %s : %v", fullpath, err) } // skip if startFileName != "" { var t []string for _, m := range members { if strings.Compare(m, startFileName) >= 0 { if m == startFileName { if inclusive { t = append(t, m) } } else { t = append(t, m) } } } members = t } // sort sort.Slice(members, func(i, j int) bool { return strings.Compare(members[i], members[j]) < 0 }) // limit if limit < len(members) { members = members[:limit] } // fetch entry meta for _, fileName := range members { path := filer2.NewFullPath(string(fullpath), fileName) entry, err := store.FindEntry(path) if err != nil { glog.V(0).Infof("list %s : %v", path, err) } else { entries = append(entries, entry) } } return entries, err } func genDirectoryListKey(dir string) (dirList string) { return dir + DIR_LIST_MARKER }