Method Bootstrap

core/base.go:391–443

Bootstrap initializes the application (aka. create data dir, open db connections, load settings, etc.). It will call ResetBootstrapState() if the application was already bootstrapped.

()

//
// It will call ResetBootstrapState() if the application was already bootstrapped.
func (app *BaseApp) Bootstrap() error {
	event := &BootstrapEvent{}
	event.App = app

	err := app.OnBootstrap().Trigger(event, func(e *BootstrapEvent) error {
		// clear resources of previous core state (if any)
		if err := app.ResetBootstrapState(); err != nil {
			return err
		}

		// ensure that data dir exist
		if err := os.MkdirAll(app.DataDir(), os.ModePerm); err != nil {
			return err
		}

		if err := app.initDataDB(); err != nil {
			return err
		}

		if err := app.initAuxDB(); err != nil {
			return err
		}

		if err := app.initLogger(); err != nil {
			return err
		}

		if err := app.RunSystemMigrations(); err != nil {
			return err
		}

		if err := app.ReloadCachedCollections(); err != nil {
			return err
		}

		if err := app.ReloadSettings(); err != nil {
			return err
		}

		// try to cleanup the pb_data temp directory (if any)
		_ = os.RemoveAll(filepath.Join(app.DataDir(), LocalTempDirName))

		return nil
	})

	// add a more user friendly message in case users forgot to call
	// e.Next() as part of their bootstrap hook
	if err == nil && !app.IsBootstrapped() {
		app.Logger().Warn("OnBootstrap hook didn't fail but the app is still not bootstrapped - maybe missing e.Next()?")
	}

	return err
}

type closer interface {
	Close() error