feat(database/metadata): define metadata DB for sqlite

internal/database/metadata/sqlite/store.go

@@ -0,0 +1,57 @@
+package sqlite
+
+import (
+	"context"
+	"time"
+
+	"github.com/oom-ai/oomstore/internal/database/metadata/informer"
+	"github.com/oom-ai/oomstore/internal/database/metadata/sqlutil"
+
+	"github.com/oom-ai/oomstore/internal/database/metadata"
+
+	"github.com/jmoiron/sqlx"
+
+	"github.com/oom-ai/oomstore/internal/database/dbutil"
+	"github.com/oom-ai/oomstore/pkg/oomstore/types"
+)
+
+const SQLiteBatchSize = 20
+
+var _ metadata.Store = &DB{}
+
+type DB struct {
+	*sqlx.DB
+	*informer.Informer
+}
+
+func Open(ctx context.Context, opt *types.SQLiteOpt) (*DB, error) {
+	db, err := dbutil.OpenSQLite(opt.DBFile)
+	if err != nil {
+		return nil, err
+	}
+	informer, err := informer.New(time.Second, func() (*informer.Cache, error) {
+		return sqlutil.ListMetaData(ctx, db)
+	})
+	if err != nil {
+		db.Close()
+		return nil, err
+	}
+	return &DB{
+		DB:       db,
+		Informer: informer,
+	}, err
+}
+
+func (db *DB) Ping(ctx context.Context) error {
+	return db.PingContext(ctx)
+}
+
+func (db *DB) Close() error {
+	if err := db.Informer.Close(); err != nil {
+		return err
+	}
+	if err := db.DB.Close(); err != nil {
+		return err
+	}
+	return nil
+}