Package Exports

3h-daemon

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Readme

3h-daemon

A daemon lib.

Using in your command line:

$ npm install 3h-daemon -g
$ 3h-daemon -h
Usage:
    3h-daemon [file] [options] [-- arguments]

Options:
    -h          Show this.
    -t <times>  Set max restart times.
    -d <delay>  Set restart delay.
    -i          No stdin.
    -o          No stdout.
    -e          No stderr.

Using in your app:

Install

$ npm install 3h-daemon

Use

const Daemon = require('3h-Daemon');
const daemon = new Daemon(
    'sever.js', // The name of the file to guard.
    ['--port', '80'], // Some arguments for it.
    { stdio: [0, 1, null] } // Options for `child_process.spawn`.
);
daemon.on('die', (code, signal) => {
    console.log(`Died! ( Code:${code} Signal:${signal} )`);
}).on('restart', process => {
    console.log(`Restart! ( pid:${process.pid} )`);
}).setMaxRestartTimes(10).setRestartDelay(1000).start();

API

Daemon(file: string, args?: string[], options?: child_process.SpawnOptions) - The constructor.
- process: child_process.ChildProcess - The current process of that file.
- restartCount: number - How many times has the file been restarted.
- maxRestartTimes: number - Max restart times.
- restartDelay: number - The delay before restarting.
- file: string - The name of the file to guard.
- args: string[] - The arguments for it.
- options: child_process.SpawnOptions - Options for child_process.spawn.
- setMaxRestartTimes(times: number): this - Set maxRestartTimes to times.
- setRestartDelay(delay: number): this - Set restartDelay to delay.
- start(): this - Start guarding.
- on(event: 'die', listener: (code: number, signal: string) => void): this - Emitted when that process exits.
- on(event: 'restart', listener: (process: child_process.ChildProcess) => void): this - Emitted when that process restarts.

ps

This lib is developed in typescript, so here's a 3h-daemon.d.ts file specified in package.json. Therefore, you can also use this lib in typescript.