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package redis2
import (
"context"
"fmt"
"time"
"github.com/redis/go-redis/v9"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/util/log"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/util"
)
const (
DIR_LIST_MARKER = "\x00"
)
type UniversalRedis2Store struct {
Client redis.UniversalClient
superLargeDirectoryHash map[string]bool
}
func (store *UniversalRedis2Store) isSuperLargeDirectory(dir string) (isSuperLargeDirectory bool) {
_, isSuperLargeDirectory = store.superLargeDirectoryHash[dir]
return
}
func (store *UniversalRedis2Store) loadSuperLargeDirectories(superLargeDirectories []string) {
// set directory hash
store.superLargeDirectoryHash = make(map[string]bool)
for _, dir := range superLargeDirectories {
store.superLargeDirectoryHash[dir] = true
}
}
func (store *UniversalRedis2Store) BeginTransaction(ctx context.Context) (context.Context, error) {
return ctx, nil
}
func (store *UniversalRedis2Store) CommitTransaction(ctx context.Context) error {
return nil
}
func (store *UniversalRedis2Store) RollbackTransaction(ctx context.Context) error {
return nil
}
func (store *UniversalRedis2Store) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
if err = store.doInsertEntry(ctx, entry); err != nil {
return err
}
dir, name := entry.FullPath.DirAndName()
if store.isSuperLargeDirectory(dir) {
return nil
}
if name != "" {
if err = store.Client.ZAddNX(ctx, genDirectoryListKey(dir), redis.Z{Score: 0, Member: name}).Err(); err != nil {
return fmt.Errorf("persisting %s in parent dir: %v", entry.FullPath, err)
}
}
return nil
}
func (store *UniversalRedis2Store) doInsertEntry(ctx context.Context, entry *filer.Entry) error {
value, err := entry.EncodeAttributesAndChunks()
if err != nil {
return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
}
if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
value = util.MaybeGzipData(value)
}
if err = store.Client.Set(ctx, string(entry.FullPath), value, time.Duration(entry.TtlSec)*time.Second).Err(); err != nil {
return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
}
return nil
}
func (store *UniversalRedis2Store) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) {
return store.doInsertEntry(ctx, entry)
}
func (store *UniversalRedis2Store) FindEntry(ctx context.Context, fullpath util.FullPath) (entry *filer.Entry, err error) {
data, err := store.Client.Get(ctx, string(fullpath)).Result()
if err == redis.Nil {
return nil, filer_pb.ErrNotFound
}
if err != nil {
return nil, fmt.Errorf("get %s : %v", fullpath, err)
}
entry = &filer.Entry{
FullPath: fullpath,
}
err = entry.DecodeAttributesAndChunks(util.MaybeDecompressData([]byte(data)))
if err != nil {
return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
}
return entry, nil
}
func (store *UniversalRedis2Store) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) {
_, err = store.Client.Del(ctx, genDirectoryListKey(string(fullpath))).Result()
if err != nil {
return fmt.Errorf("delete dir list %s : %v", fullpath, err)
}
_, err = store.Client.Del(ctx, string(fullpath)).Result()
if err != nil {
return fmt.Errorf("delete %s : %v", fullpath, err)
}
dir, name := fullpath.DirAndName()
if store.isSuperLargeDirectory(dir) {
return nil
}
if name != "" {
_, err = store.Client.ZRem(ctx, genDirectoryListKey(dir), name).Result()
if err != nil {
return fmt.Errorf("DeleteEntry %s in parent dir: %v", fullpath, err)
}
}
return nil
}
func (store *UniversalRedis2Store) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
if store.isSuperLargeDirectory(string(fullpath)) {
return nil
}
members, err := store.Client.ZRangeByLex(ctx, genDirectoryListKey(string(fullpath)), &redis.ZRangeBy{
Min: "-",
Max: "+",
}).Result()
if err != nil {
return fmt.Errorf("DeleteFolderChildren %s : %v", fullpath, err)
}
for _, fileName := range members {
path := util.NewFullPath(string(fullpath), fileName)
_, err = store.Client.Del(ctx, string(path)).Result()
if err != nil {
return fmt.Errorf("DeleteFolderChildren %s in parent dir: %v", fullpath, err)
}
// not efficient, but need to remove if it is a directory
store.Client.Del(ctx, genDirectoryListKey(string(path)))
}
return nil
}
func (store *UniversalRedis2Store) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
return lastFileName, filer.ErrUnsupportedListDirectoryPrefixed
}
func (store *UniversalRedis2Store) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
dirListKey := genDirectoryListKey(string(dirPath))
min := "-"
if startFileName != "" {
if includeStartFile {
min = "[" + startFileName
} else {
min = "(" + startFileName
}
}
members, err := store.Client.ZRangeByLex(ctx, dirListKey, &redis.ZRangeBy{
Min: min,
Max: "+",
Offset: 0,
Count: limit,
}).Result()
if err != nil {
return lastFileName, fmt.Errorf("list %s : %v", dirPath, err)
}
// fetch entry meta
for _, fileName := range members {
path := util.NewFullPath(string(dirPath), fileName)
entry, err := store.FindEntry(ctx, path)
lastFileName = fileName
if err != nil {
log.V(3).Infof("list %s : %v", path, err)
if err == filer_pb.ErrNotFound {
continue
}
} else {
if entry.TtlSec > 0 {
if entry.Attr.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
store.Client.Del(ctx, string(path)).Result()
store.Client.ZRem(ctx, dirListKey, fileName).Result()
continue
}
}
if !eachEntryFunc(entry) {
break
}
}
}
return lastFileName, err
}
func genDirectoryListKey(dir string) (dirList string) {
return dir + DIR_LIST_MARKER
}
func (store *UniversalRedis2Store) Shutdown() {
store.Client.Close()
}
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