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restructuring sql stores

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This commit is contained in:
Chris Lu
2021-01-19 13:53:16 -08:00
parent 96354208c5
commit 4c5b752b04
4 changed files with 162 additions and 47 deletions
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113
weed/filer/abstract_sql/abstract_sql_store.go
View File

@@ -9,21 +9,28 @@ import (
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
"strings"
"sync"
)
type SqlGenerator interface {
GetSqlInsert(bucket string) string
GetSqlUpdate(bucket string) string
GetSqlFind(bucket string) string
GetSqlDelete(bucket string) string
GetSqlDeleteFolderChildren(bucket string) string
GetSqlListExclusive(bucket string) string
GetSqlListInclusive(bucket string) string
}
type AbstractSqlStore struct {
DB *sql.DB
SqlInsert string
SqlUpdate string
SqlFind string
SqlDelete string
SqlDeleteFolderChildren string
SqlListExclusive string
SqlListInclusive string
DB *sql.DB
SqlGenerator
dbs map[string]bool
dbsLock sync.Mutex
}
const (
DEFAULT = "_main"
DEFAULT_TABLE = "filemeta"
)
type TxOrDB interface {
@@ -57,16 +64,53 @@ func (store *AbstractSqlStore) RollbackTransaction(ctx context.Context) error {
}
func (store *AbstractSqlStore) getTxOrDB(ctx context.Context, fullpath util.FullPath, isForChildren bool) (txOrDB TxOrDB, bucket string, shortPath util.FullPath, err error) {
shortPath = fullpath
bucket = DEFAULT_TABLE
if tx, ok := ctx.Value("tx").(*sql.Tx); ok {
return tx, bucket, shortPath, err
txOrDB = tx
} else {
txOrDB = store.DB
}
return store.DB, bucket, shortPath, err
if strings.HasPrefix(string(fullpath), "/buckets/") {
return
}
// detect bucket
bucketAndObjectKey := string(fullpath)[len("/buckets/"):]
t := strings.Index(bucketAndObjectKey, "/")
if t < 0 && !isForChildren {
return
}
if t > 0 {
bucket = bucketAndObjectKey[:t]
shortPath = util.FullPath(bucketAndObjectKey[t:])
}
if isValidBucket(bucket) {
store.dbsLock.Lock()
defer store.dbsLock.Unlock()
if store.dbs == nil {
store.dbs = make(map[string]bool)
}
if _, found := store.dbs[bucket]; !found {
if err = store.createTable(bucket); err != nil {
store.dbs[bucket] = true
}
}
}
return
}
func (store *AbstractSqlStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
db, _, shortPath, err := store.getTxOrDB(ctx, entry.FullPath, false)
db, bucket, shortPath, err := store.getTxOrDB(ctx, entry.FullPath, false)
if err != nil {
return fmt.Errorf("findDB %s : %v", entry.FullPath, err)
}
@@ -81,7 +125,7 @@ func (store *AbstractSqlStore) InsertEntry(ctx context.Context, entry *filer.Ent
meta = util.MaybeGzipData(meta)
}
res, err := db.ExecContext(ctx, store.SqlInsert, util.HashStringToLong(dir), name, dir, meta)
res, err := db.ExecContext(ctx, store.GetSqlInsert(bucket), util.HashStringToLong(dir), name, dir, meta)
if err == nil {
return
}
@@ -94,7 +138,7 @@ func (store *AbstractSqlStore) InsertEntry(ctx context.Context, entry *filer.Ent
// now the insert failed possibly due to duplication constraints
glog.V(1).Infof("insert %s falls back to update: %v", entry.FullPath, err)
res, err = db.ExecContext(ctx, store.SqlUpdate, meta, util.HashStringToLong(dir), name, dir)
res, err = db.ExecContext(ctx, store.GetSqlUpdate(bucket), meta, util.HashStringToLong(dir), name, dir)
if err != nil {
return fmt.Errorf("upsert %s: %s", entry.FullPath, err)
}
@@ -109,7 +153,7 @@ func (store *AbstractSqlStore) InsertEntry(ctx context.Context, entry *filer.Ent
func (store *AbstractSqlStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) {
db, _, shortPath, err := store.getTxOrDB(ctx, entry.FullPath, false)
db, bucket, shortPath, err := store.getTxOrDB(ctx, entry.FullPath, false)
if err != nil {
return fmt.Errorf("findDB %s : %v", entry.FullPath, err)
}
@@ -120,7 +164,7 @@ func (store *AbstractSqlStore) UpdateEntry(ctx context.Context, entry *filer.Ent
return fmt.Errorf("encode %s: %s", entry.FullPath, err)
}
res, err := db.ExecContext(ctx, store.SqlUpdate, meta, util.HashStringToLong(dir), name, dir)
res, err := db.ExecContext(ctx, store.GetSqlUpdate(bucket), meta, util.HashStringToLong(dir), name, dir)
if err != nil {
return fmt.Errorf("update %s: %s", entry.FullPath, err)
}
@@ -134,13 +178,13 @@ func (store *AbstractSqlStore) UpdateEntry(ctx context.Context, entry *filer.Ent
func (store *AbstractSqlStore) FindEntry(ctx context.Context, fullpath util.FullPath) (*filer.Entry, error) {
db, _, shortPath, err := store.getTxOrDB(ctx, fullpath, false)
db, bucket, shortPath, err := store.getTxOrDB(ctx, fullpath, false)
if err != nil {
return nil, fmt.Errorf("findDB %s : %v", fullpath, err)
}
dir, name := shortPath.DirAndName()
row := db.QueryRowContext(ctx, store.SqlFind, util.HashStringToLong(dir), name, dir)
row := db.QueryRowContext(ctx, store.GetSqlFind(bucket), util.HashStringToLong(dir), name, dir)
var data []byte
if err := row.Scan(&data); err != nil {
@@ -162,14 +206,14 @@ func (store *AbstractSqlStore) FindEntry(ctx context.Context, fullpath util.Full
func (store *AbstractSqlStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) error {
db, _, shortPath, err := store.getTxOrDB(ctx, fullpath, false)
db, bucket, shortPath, err := store.getTxOrDB(ctx, fullpath, false)
if err != nil {
return fmt.Errorf("findDB %s : %v", fullpath, err)
}
dir, name := shortPath.DirAndName()
res, err := db.ExecContext(ctx, store.SqlDelete, util.HashStringToLong(dir), name, dir)
res, err := db.ExecContext(ctx, store.GetSqlDelete(bucket), util.HashStringToLong(dir), name, dir)
if err != nil {
return fmt.Errorf("delete %s: %s", fullpath, err)
}
@@ -189,12 +233,16 @@ func (store *AbstractSqlStore) DeleteFolderChildren(ctx context.Context, fullpat
return fmt.Errorf("findDB %s : %v", fullpath, err)
}
if bucket != DEFAULT && shortPath == "/" {
store.deleteTable(bucket)
return nil
if isValidBucket(bucket) && shortPath == "/" {
if store.deleteTable(bucket) {
store.dbsLock.Lock()
delete(store.dbs, bucket)
store.dbsLock.Unlock()
return nil
}
}
res, err := db.ExecContext(ctx, store.SqlDeleteFolderChildren, util.HashStringToLong(string(shortPath)), fullpath)
res, err := db.ExecContext(ctx, store.GetSqlDeleteFolderChildren(bucket), util.HashStringToLong(string(shortPath)), fullpath)
if err != nil {
return fmt.Errorf("deleteFolderChildren %s: %s", fullpath, err)
}
@@ -209,14 +257,14 @@ func (store *AbstractSqlStore) DeleteFolderChildren(ctx context.Context, fullpat
func (store *AbstractSqlStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
db, _, shortPath, err := store.getTxOrDB(ctx, dirPath, true)
db, bucket, shortPath, err := store.getTxOrDB(ctx, dirPath, true)
if err != nil {
return lastFileName, fmt.Errorf("findDB %s : %v", dirPath, err)
}
sqlText := store.SqlListExclusive
sqlText := store.GetSqlListExclusive(bucket)
if includeStartFile {
sqlText = store.SqlListInclusive
sqlText = store.GetSqlListInclusive(bucket)
}
rows, err := db.QueryContext(ctx, sqlText, util.HashStringToLong(string(shortPath)), startFileName, string(shortPath), prefix+"%", limit+1)
@@ -259,5 +307,14 @@ func (store *AbstractSqlStore) Shutdown() {
store.DB.Close()
}
func (store *AbstractSqlStore) deleteTable(bucket string) {
func isValidBucket(bucket string) bool {
return bucket != DEFAULT_TABLE && bucket != ""
}
func (store *AbstractSqlStore) createTable(bucket string) error {
return nil
}
func (store *AbstractSqlStore) deleteTable(bucket string) bool {
return false
}

8
weed/filer/abstract_sql/abstract_sql_store_kv.go
View File

@@ -20,7 +20,7 @@ func (store *AbstractSqlStore) KvPut(ctx context.Context, key []byte, value []by
dirStr, dirHash, name := genDirAndName(key)
res, err := db.ExecContext(ctx, store.SqlInsert, dirHash, name, dirStr, value)
res, err := db.ExecContext(ctx, store.GetSqlInsert(DEFAULT_TABLE), dirHash, name, dirStr, value)
if err == nil {
return
}
@@ -33,7 +33,7 @@ func (store *AbstractSqlStore) KvPut(ctx context.Context, key []byte, value []by
// now the insert failed possibly due to duplication constraints
glog.V(1).Infof("kv insert falls back to update: %s", err)
res, err = db.ExecContext(ctx, store.SqlUpdate, value, dirHash, name, dirStr)
res, err = db.ExecContext(ctx, store.GetSqlUpdate(DEFAULT_TABLE), value, dirHash, name, dirStr)
if err != nil {
return fmt.Errorf("kv upsert: %s", err)
}
@@ -54,7 +54,7 @@ func (store *AbstractSqlStore) KvGet(ctx context.Context, key []byte) (value []b
}
dirStr, dirHash, name := genDirAndName(key)
row := db.QueryRowContext(ctx, store.SqlFind, dirHash, name, dirStr)
row := db.QueryRowContext(ctx, store.GetSqlFind(DEFAULT_TABLE), dirHash, name, dirStr)
err = row.Scan(&value)
@@ -78,7 +78,7 @@ func (store *AbstractSqlStore) KvDelete(ctx context.Context, key []byte) (err er
dirStr, dirHash, name := genDirAndName(key)
res, err := db.ExecContext(ctx, store.SqlDelete, dirHash, name, dirStr)
res, err := db.ExecContext(ctx, store.GetSqlDelete(DEFAULT_TABLE), dirHash, name, dirStr)
if err != nil {
return fmt.Errorf("kv delete: %s", err)
}