運行Laravel隊列的「最佳方式」監聽

Question

目前我正在開發一個項目，在該項目中排隊發送電子郵件。但是我不知道運行隊列監聽器的「最佳方式」是什麼。現在我只知道nohup的方式。

但是，通過使用nohup，感覺像隊列偵聽器不再是應用程序的一部分。這就像使用調度程序使您的cronjob成爲應用程序的更多部分。

有沒有其他的方法來聽隊列，你會喜歡什麼？

Answer 1

這裏是我寫來實現：

應用程序/控制檯/命令/ QueueProcessListener.php

<?php 

namespace App\Console\Commands; 

use Illuminate\Console\Command; 

class QueueProcessListener extends Command 
{ 
    /** 
    * The name of the command/process we want to monitor. This string will be used both to check to see if the process 
    * is currently running and to spawn it (The arguments are appended to it). 
    * 
    * @var string 
    */ 
    protected $command = 'php artisan queue:listen'; 

    /** 
    * The arguments to pass to the process when spawning it. 
    * 
    * @var string 
    */ 
    protected $arguments = '--tries=3'; 

    /** 
    * The signature of the console command. We use the signature when running it through Artisan: php artisan $signature 
    * 
    * @var string 
    */ 
    protected $signature = 'queue-process-listener'; 

    /** 
    * The console command description. 
    * 
    * @var string 
    */ 
    protected $description = 'Monitor the queue listener process to ensure it is always running.'; 

    /** 
    * Create a new command instance. 
    */ 
    public function __construct() 
    { 
     parent::__construct(); 
    } 

    /** 
    * Execute the console command. 
    * 
    * @return mixed 
    */ 
    public function handle() 
    { 
     if (!$this->isProcessRunning($this->command)) { 
      $this->info("Starting queue listener."); 
      $this->executeShellCommand($this->command, $this->arguments, true); 
     } else { 
      $this->info("Queue listener is running."); 
     } 
    } 

    /** 
    * Execute a shell command, with the provided arguments, and optionally in the background. Commands that are not run 
    * in the background will return their output/response. 
    * 
    * @param $command 
    * @param string $arguments 
    * @param bool $background 
    * @return string 
    */ 
    public function executeShellCommand($command, $arguments = '', $background = false) 
    { 
     $command = trim($command); 
     if (!is_string($command) || empty($command)) { 
      return null; 
     } 

     $arguments = trim($arguments); 

     $cmd = trim($command . ' ' . $arguments) . ($background ? ' > /dev/null 2>/dev/null &' : ''); 
     return shell_exec($cmd); 
    } 

    /** 
    * Check if a process is running using pgrep. 
    * 
    * @param $process 
    * @return bool 
    */ 
    public function isProcessRunning($process) 
    { 
     $output = $this->executeShellCommand('pgrep -f "' . $process . '"'); 

     return !empty(trim($output)); 
    } 
} 

應用程序/軟件/ Kernel.php

<?php 

namespace App\Console; 

use Illuminate\Console\Scheduling\Schedule; 
use Illuminate\Foundation\Console\Kernel as ConsoleKernel; 

class Kernel extends ConsoleKernel 
{ 
    /** 
    * The Artisan commands provided by your application. 
    * 
    * @var array 
    */ 
    protected $commands = [ 
     Commands\QueueProcessListener::class 
    ]; 

    /** 
    * Define the application's command schedule. 
    * 
    * @param \Illuminate\Console\Scheduling\Schedule $schedule 
    * @return void 
    */ 
    protected function schedule(Schedule $schedule) 
    { 
     // Schedule my process listener to run every 5 minutes. 
     $schedule->command('queue-process-listener')->everyFiveMinutes(); 
    } 
} 

Answer 2

文檔告訴你如何實現這一點： https://laravel.com/docs/5.3/queues#supervisor-configuration

我不確定你的意思是不是「應用程序的一部分」。 Crons和後臺工作進程是任何規模服務器體系結構的標準部分。使用它們沒有任何問題。

你也應該真的避免做Jonathon的回答建議，這基本上是用php編寫你自己的supervisord。如果你的服務器重新啓動會怎樣已經有針對這個問題的經過測試的解決方案，現在已經由linux社區開發和支持了很長時間 - 您應該真的使用它們。