FilerStore: add redis_lua

weed/filer/redis_lua/universal_redis_store.go

@@ -0,0 +1,191 @@
+package redis_lua
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/go-redis/redis/v8"
+
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/filer/redis_lua/stored_procedure"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+const (
+	DIR_LIST_MARKER = "\x00"
+)
+
+type UniversalRedisLuaStore struct {
+	Client                  redis.UniversalClient
+	superLargeDirectoryHash map[string]bool
+}
+
+func (store *UniversalRedisLuaStore) isSuperLargeDirectory(dir string) (isSuperLargeDirectory bool) {
+	_, isSuperLargeDirectory = store.superLargeDirectoryHash[dir]
+	return
+}
+
+func (store *UniversalRedisLuaStore) loadSuperLargeDirectories(superLargeDirectories []string) {
+	// set directory hash
+	store.superLargeDirectoryHash = make(map[string]bool)
+	for _, dir := range superLargeDirectories {
+		store.superLargeDirectoryHash[dir] = true
+	}
+}
+
+func (store *UniversalRedisLuaStore) BeginTransaction(ctx context.Context) (context.Context, error) {
+	return ctx, nil
+}
+func (store *UniversalRedisLuaStore) CommitTransaction(ctx context.Context) error {
+	return nil
+}
+func (store *UniversalRedisLuaStore) RollbackTransaction(ctx context.Context) error {
+	return nil
+}
+
+func (store *UniversalRedisLuaStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
+
+	value, err := entry.EncodeAttributesAndChunks()
+	if err != nil {
+		return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
+	}
+
+	if len(entry.Chunks) > 50 {
+		value = util.MaybeGzipData(value)
+	}
+
+	dir, name := entry.FullPath.DirAndName()
+
+	err = stored_procedure.InsertEntryScript.Run(ctx, store.Client,
+		[]string{string(entry.FullPath), genDirectoryListKey(dir)},
+		value, entry.TtlSec,
+		store.isSuperLargeDirectory(dir), 0, name).Err()
+
+	if err != nil {
+		return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
+	}
+
+	return nil
+}
+
+func (store *UniversalRedisLuaStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) {
+
+	return store.InsertEntry(ctx, entry)
+}
+
+func (store *UniversalRedisLuaStore) 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 *UniversalRedisLuaStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) {
+
+	dir, name := fullpath.DirAndName()
+
+	err = stored_procedure.DeleteEntryScript.Run(ctx, store.Client,
+		[]string{string(fullpath), genDirectoryListKey(string(fullpath)), genDirectoryListKey(dir)},
+		store.isSuperLargeDirectory(dir), name).Err()
+
+	if err != nil {
+		return fmt.Errorf("DeleteEntry %s : %v", fullpath, err)
+	}
+
+	return nil
+}
+
+func (store *UniversalRedisLuaStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
+
+	if store.isSuperLargeDirectory(string(fullpath)) {
+		return nil
+	}
+
+	err = stored_procedure.DeleteFolderChildrenScript.Run(ctx, store.Client,
+		[]string{string(fullpath)}).Err()
+
+	if err != nil {
+		return fmt.Errorf("DeleteFolderChildren %s : %v", fullpath, err)
+	}
+
+	return nil
+}
+
+func (store *UniversalRedisLuaStore) 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 *UniversalRedisLuaStore) 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 {
+			glog.V(0).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.DeleteEntry(ctx, path)
+					continue
+				}
+			}
+			if !eachEntryFunc(entry) {
+				break
+			}
+		}
+	}
+
+	return lastFileName, err
+}
+
+func genDirectoryListKey(dir string) (dirList string) {
+	return dir + DIR_LIST_MARKER
+}
+
+func (store *UniversalRedisLuaStore) Shutdown() {
+	store.Client.Close()
+}