migrate to multiple sqlite db files ( primary + requests + logs )

scnserver/db/impl/logs/meta.go

@@ -0,0 +1,242 @@
+package logs
+
+import (
+	"context"
+	"errors"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/sq"
+)
+
+func (db *Database) ReadSchema(ctx context.Context) (retval int, reterr error) {
+
+	r1, err := db.db.Query(ctx, "SELECT name FROM sqlite_master WHERE type = :typ AND name = :name", sq.PP{"typ": "table", "name": "meta"})
+	if err != nil {
+		return 0, err
+	}
+	defer func() {
+		err = r1.Close()
+		if err != nil {
+			// overwrite return values
+			retval = 0
+			reterr = err
+		}
+	}()
+
+	if !r1.Next() {
+		return 0, nil
+	}
+
+	err = r1.Close()
+	if err != nil {
+		return 0, err
+	}
+
+	r2, err := db.db.Query(ctx, "SELECT value_int FROM meta WHERE meta_key = :key", sq.PP{"key": "schema"})
+	if err != nil {
+		return 0, err
+	}
+	defer func() {
+		err = r2.Close()
+		if err != nil {
+			// overwrite return values
+			retval = 0
+			reterr = err
+		}
+	}()
+
+	if !r2.Next() {
+		return 0, errors.New("no schema entry in meta table")
+	}
+
+	var dbschema int
+	err = r2.Scan(&dbschema)
+	if err != nil {
+		return 0, err
+	}
+
+	err = r2.Close()
+	if err != nil {
+		return 0, err
+	}
+
+	return dbschema, nil
+}
+
+func (db *Database) WriteMetaString(ctx context.Context, key string, value string) error {
+	_, err := db.db.Exec(ctx, "INSERT INTO meta (meta_key, value_txt) VALUES (:key, :val) ON CONFLICT(meta_key) DO UPDATE SET value_txt = :val", sq.PP{
+		"key": key,
+		"val": value,
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (db *Database) WriteMetaInt(ctx context.Context, key string, value int64) error {
+	_, err := db.db.Exec(ctx, "INSERT INTO meta (meta_key, value_int) VALUES (:key, :val) ON CONFLICT(meta_key) DO UPDATE SET value_int = :val", sq.PP{
+		"key": key,
+		"val": value,
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (db *Database) WriteMetaReal(ctx context.Context, key string, value float64) error {
+	_, err := db.db.Exec(ctx, "INSERT INTO meta (meta_key, value_real) VALUES (:key, :val) ON CONFLICT(meta_key) DO UPDATE SET value_real = :val", sq.PP{
+		"key": key,
+		"val": value,
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (db *Database) WriteMetaBlob(ctx context.Context, key string, value []byte) error {
+	_, err := db.db.Exec(ctx, "INSERT INTO meta (meta_key, value_blob) VALUES (:key, :val) ON CONFLICT(meta_key) DO UPDATE SET value_blob = :val", sq.PP{
+		"key": key,
+		"val": value,
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (db *Database) ReadMetaString(ctx context.Context, key string) (retval *string, reterr error) {
+	r2, err := db.db.Query(ctx, "SELECT value_txt FROM meta WHERE meta_key = :key", sq.PP{"key": key})
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		err = r2.Close()
+		if err != nil {
+			// overwrite return values
+			retval = nil
+			reterr = err
+		}
+	}()
+	if !r2.Next() {
+		return nil, errors.New("no matching entry in meta table")
+	}
+
+	var value string
+	err = r2.Scan(&value)
+	if err != nil {
+		return nil, err
+	}
+
+	err = r2.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return langext.Ptr(value), nil
+}
+
+func (db *Database) ReadMetaInt(ctx context.Context, key string) (retval *int64, reterr error) {
+	r2, err := db.db.Query(ctx, "SELECT value_int FROM meta WHERE meta_key = :key", sq.PP{"key": key})
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		err = r2.Close()
+		if err != nil {
+			// overwrite return values
+			retval = nil
+			reterr = err
+		}
+	}()
+
+	if !r2.Next() {
+		return nil, errors.New("no matching entry in meta table")
+	}
+
+	var value int64
+	err = r2.Scan(&value)
+	if err != nil {
+		return nil, err
+	}
+
+	err = r2.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return langext.Ptr(value), nil
+}
+
+func (db *Database) ReadMetaReal(ctx context.Context, key string) (retval *float64, reterr error) {
+	r2, err := db.db.Query(ctx, "SELECT value_real FROM meta WHERE meta_key = :key", sq.PP{"key": key})
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		err = r2.Close()
+		if err != nil {
+			// overwrite return values
+			retval = nil
+			reterr = err
+		}
+	}()
+
+	if !r2.Next() {
+		return nil, errors.New("no matching entry in meta table")
+	}
+
+	var value float64
+	err = r2.Scan(&value)
+	if err != nil {
+		return nil, err
+	}
+
+	err = r2.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return langext.Ptr(value), nil
+}
+
+func (db *Database) ReadMetaBlob(ctx context.Context, key string) (retval *[]byte, reterr error) {
+	r2, err := db.db.Query(ctx, "SELECT value_blob FROM meta WHERE meta_key = :key", sq.PP{"key": key})
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		err = r2.Close()
+		if err != nil {
+			// overwrite return values
+			retval = nil
+			reterr = err
+		}
+	}()
+
+	if !r2.Next() {
+		return nil, errors.New("no matching entry in meta table")
+	}
+
+	var value []byte
+	err = r2.Scan(&value)
+	if err != nil {
+		return nil, err
+	}
+
+	err = r2.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return langext.Ptr(value), nil
+}
+
+func (db *Database) DeleteMeta(ctx context.Context, key string) error {
+	_, err := db.db.Exec(ctx, "DELETE FROM meta WHERE meta_key = :key", sq.PP{"key": key})
+	if err != nil {
+		return err
+	}
+	return nil
+}