seaweedfs/weed/filer/redis_lua/universal_redis_store.go

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2022-02-15 12:54:57 +00:00
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()
}