seaweedfs/weed/filer2/redis2/universal_redis_store.go

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package redis2
import (
"context"
"fmt"
"time"
"github.com/go-redis/redis"
"github.com/chrislusf/seaweedfs/weed/filer2"
"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 UniversalRedis2Store struct {
Client redis.UniversalClient
}
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 *filer2.Entry) (err error) {
value, err := entry.EncodeAttributesAndChunks()
if err != nil {
return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
}
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if err = store.Client.Set(string(entry.FullPath), value, time.Duration(entry.TtlSec)*time.Second).Err(); err != nil {
return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
}
dir, name := entry.FullPath.DirAndName()
if name != "" {
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if err = store.Client.ZAddNX(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) UpdateEntry(ctx context.Context, entry *filer2.Entry) (err error) {
return store.InsertEntry(ctx, entry)
}
func (store *UniversalRedis2Store) FindEntry(ctx context.Context, fullpath util.FullPath) (entry *filer2.Entry, err error) {
data, err := store.Client.Get(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 = &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 *UniversalRedis2Store) DeleteEntry(ctx context.Context, fullpath util.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.ZRem(genDirectoryListKey(dir), name).Result()
if err != nil {
return fmt.Errorf("delete %s in parent dir: %v", fullpath, err)
}
}
return nil
}
func (store *UniversalRedis2Store) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
members, err := store.Client.ZRange(genDirectoryListKey(string(fullpath)), 0, -1).Result()
if err != nil {
return fmt.Errorf("delete folder %s : %v", fullpath, err)
}
for _, fileName := range members {
path := util.NewFullPath(string(fullpath), fileName)
_, err = store.Client.Del(string(path)).Result()
if err != nil {
return fmt.Errorf("delete %s in parent dir: %v", fullpath, err)
}
}
return nil
}
func (store *UniversalRedis2Store) ListDirectoryEntries(ctx context.Context, fullpath util.FullPath, startFileName string, inclusive bool,
limit int) (entries []*filer2.Entry, err error) {
dirListKey := genDirectoryListKey(string(fullpath))
start := int64(0)
if startFileName != "" {
start, _ = store.Client.ZRank(dirListKey, startFileName).Result()
if !inclusive {
start++
}
}
members, err := store.Client.ZRange(dirListKey, start, start+int64(limit)-1).Result()
if err != nil {
return nil, fmt.Errorf("list %s : %v", fullpath, err)
}
// fetch entry meta
for _, fileName := range members {
path := util.NewFullPath(string(fullpath), fileName)
entry, err := store.FindEntry(ctx, path)
if err != nil {
glog.V(0).Infof("list %s : %v", path, err)
} else {
if entry.TtlSec > 0 {
if entry.Attr.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
store.Client.Del(string(path)).Result()
store.Client.ZRem(dirListKey, fileName).Result()
continue
}
}
entries = append(entries, entry)
}
}
return entries, err
}
func genDirectoryListKey(dir string) (dirList string) {
return dir + DIR_LIST_MARKER
}
func (store *UniversalRedis2Store) Shutdown() {
store.Client.Close()
}