github.com/e154/smart-home@v0.17.2-0.20240311175135-e530a6e5cd45/common/app/app.go (about)

     1  // This file is part of the Smart Home
     2  // Program complex distribution https://github.com/e154/smart-home
     3  // Copyright (C) 2016-2023, Filippov Alex
     4  //
     5  // This library is free software: you can redistribute it and/or
     6  // modify it under the terms of the GNU Lesser General Public
     7  // License as published by the Free Software Foundation; either
     8  // version 3 of the License, or (at your option) any later version.
     9  //
    10  // This library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13  // Library General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public
    16  // License along with this library.  If not, see
    17  // <https://www.gnu.org/licenses/>.
    18  
    19  package app
    20  
    21  import (
    22  	"context"
    23  	"fmt"
    24  	"os"
    25  	"os/signal"
    26  	"syscall"
    27  	"time"
    28  
    29  	"go.uber.org/fx"
    30  )
    31  
    32  var Restore bool
    33  
    34  // Start ...
    35  func Start(app *fx.App) {
    36  	startCtx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
    37  	defer cancel()
    38  	if err := app.Start(startCtx); err != nil {
    39  		fmt.Fprintln(os.Stderr, err)
    40  		os.Exit(1)
    41  		return
    42  	}
    43  }
    44  
    45  // Work ...
    46  func Work() {
    47  	var gracefulStop = make(chan os.Signal, 10)
    48  	signal.Notify(gracefulStop, syscall.SIGINT, syscall.SIGTERM)
    49  
    50  	<-gracefulStop
    51  }
    52  
    53  // Stop ...
    54  func Stop(app *fx.App) {
    55  	t := 60 * time.Second
    56  	if Restore {
    57  		t = 15 * time.Minute
    58  	}
    59  	stopCtx, cancel := context.WithTimeout(context.Background(), t)
    60  	defer cancel()
    61  	if err := app.Stop(stopCtx); err != nil {
    62  		fmt.Fprintln(os.Stderr, err)
    63  		os.Exit(1)
    64  	}
    65  }
    66  
    67  func Kill() error {
    68  	return syscall.Kill(syscall.Getpid(), syscall.SIGINT)
    69  }
    70  
    71  func Do(builder func(opt fx.Option) (app *fx.App), options fx.Option) {
    72  	app := builder(options)
    73  
    74  	Start(app)
    75  
    76  	Work()
    77  
    78  	Stop(app)
    79  }