Method ReloadConfigDatabases

core/api.go:1011–1054

ReloadConfigDatabases swaps to conf while rediscoving and rebuilding only the named database contexts. It is intended for service-owned config commits that have already proved the change is database-source scoped. Use Reload for global config, auth, relationship, resolver, API, filesystem, or workfl

(conf *Config, databases []string, opts ...Option)

// global config, auth, relationship, resolver, API, filesystem, or workflow
// changes.
func (g *GraphJin) ReloadConfigDatabases(conf *Config, databases []string, opts ...Option) error {
	if conf == nil {
		return fmt.Errorf("config is required")
	}
	reloadSet := make(map[string]struct{}, len(databases))
	for _, name := range databases {
		name = strings.TrimSpace(name)
		if name != "" {
			reloadSet[name] = struct{}{}
		}
	}
	if len(reloadSet) == 0 {
		return fmt.Errorf("at least one database name is required")
	}

	g.reloadMu.Lock()
	defer g.reloadMu.Unlock()

	base, err := g.getEngine()
	if err != nil {
		return err
	}
	if len(opts) == 0 {
		opts = base.opts
	}
	if err := g.newGraphJinReloadingConfigDatabases(base, conf, reloadSet, opts...); err != nil {
		return err
	}
	next, err := g.getEngine()
	if err != nil {
		return err
	}
	names := make([]string, 0, len(reloadSet))
	for name := range reloadSet {
		names = append(names, name)
	}
	sort.Strings(names)
	for _, name := range names {
		if ctx, ok := next.databases[name]; ok && ctx.dbinfo != nil {
			g.fireSchemaCallbacks(name, fmt.Sprintf("%x", ctx.dbinfo.Hash()))
		}
	}
	return nil
}

// ReloadWithDB redoes database discover with a new primary DB connection.
func (g *GraphJin) ReloadWithDB(db *sql.DB) error {