runner.go

// Copyright 2017 The go-hep Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package fwk

import (
	"fmt"

	"go-hep.org/x/hep/fwk/fsm"
)

// irunner wraps an appmgr to implement fwk.Scripter
type irunner struct {
	app *appmgr
}

func (ui irunner) lvl() Level {
	return ui.app.msg.lvl
}

func (ui irunner) state() fsm.State {
	return ui.app.state
}

func (ui *irunner) Configure() error {
	ctx := ctxType{
		id:    0,
		slot:  0,
		store: nil,
		msg:   newMsgStream("<root>", ui.lvl(), nil),
	}

	err := ui.app.configure(ctx)
	if err != nil {
		return fmt.Errorf("fwk: could not configure application: %w", err)
	}

	return nil
}

func (ui *irunner) Start() error {
	ctx := ctxType{
		id:    0,
		slot:  0,
		store: nil,
		msg:   newMsgStream("<root>", ui.lvl(), nil),
	}

	if ui.state() < fsm.Configured {
		return fmt.Errorf("fwk: invalid app state (%v). need at least %s", ui.state(), fsm.Configured)
	}

	err := ui.app.start(ctx)
	if err != nil {
		return fmt.Errorf("fwk: could not start application: %w", err)
	}

	return nil
}

func (ui *irunner) Run(evtmax int64) error {
	ctx := ctxType{
		id:    0,
		slot:  0,
		store: nil,
		msg:   newMsgStream("<root>", ui.lvl(), nil),
	}

	if ui.state() < fsm.Started {
		return fmt.Errorf("fwk: invalid app state (%v). need at least %s", ui.state(), fsm.Started)
	}

	err := ui.app.run(ctx)
	if err != nil {
		return fmt.Errorf("fwk: could not run application: %w", err)
	}

	return nil
}

func (ui *irunner) Stop() error {
	ctx := ctxType{
		id:    0,
		slot:  0,
		store: nil,
		msg:   newMsgStream("<root>", ui.lvl(), nil),
	}

	if ui.state() < fsm.Running {
		return fmt.Errorf("fwk: invalid app state (%v). need at least %s", ui.state(), fsm.Running)
	}

	err := ui.app.stop(ctx)
	if err != nil {
		return fmt.Errorf("fwk: could not stop application: %w", err)
	}

	return nil
}

func (ui *irunner) Shutdown() error {
	ctx := ctxType{
		id:    0,
		slot:  0,
		store: nil,
		msg:   newMsgStream("<root>", ui.lvl(), nil),
	}

	if ui.state() < fsm.Stopped {
		return fmt.Errorf("fwk: invalid app state (%v). need at least %s", ui.state(), fsm.Stopped)
	}

	err := ui.app.shutdown(ctx)
	if err != nil {
		return fmt.Errorf("fwk: could not shutdown application: %w", err)
	}

	return nil
}

var (
	_ Scripter = (*irunner)(nil)
)