Tasks like sending email reminders, checking for inactive users, running daily backups, etc., are usually repetitive and as such developers/sysadmins need to leverage the power of cron to automate such tasks.
This tutorial will show how to automate tasks in a laravel application (known as scheduling).
Step 1: On the command line in the directory of your Laravel application, run the following command on the console to create a new command:
php artisan make:command CurrencyCron --command=curr:cron
Step 2: Open the newly-created Command file and edit the logic as follows:
(Directory: app/Console/Commands/CurrencyCron.php)
namespace App\Console\Commands;
use Illuminate\Console\Command;
use App\Models\Fx_rates;
class CurrencyCron extends Command
{
/**
* The name and signature of the console command.
*
* @var string
*/
protected $signature = 'curr:cron';
/**
* The console command description.
*
* @var string
*/
protected $description = 'Command description';
/**
* Create a new command instance.
*
* @return void
*/
public function __construct()
{
parent::__construct();
}
/**
* Execute the console command.
*
* @return int
*/
public function handle()
{
\Log::info("Cron running!");
// Database, email or backup logic goes here:
$convert = new Fx_rates();
$convert->base_curr = "NGN";
$convert->target_curr = $currency;
$convert->online_forex_rate = $res;
$convert->desc = $word;
$convert->save();
}
}
Step 3: Register the command on the Kernel.php file to handle frequency and when you want the command to run.
(Directory: app/Console/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\CurrencyCron::class,
];
/**
* Define the application's command schedule.
*
* @param \Illuminate\Console\Scheduling\Schedule $schedule
* @return void
*/
protected function schedule(Schedule $schedule)
{
// $schedule->command('inspire')->hourly();
$schedule->command('curr:cron')
->timezone('Africa/Lagos')
->dailyAt('08:00');
}
/**
* Register the commands for the application.
*
* @return void
*/
protected function commands()
{
$this->load(__DIR__.'/Commands');
require base_path('routes/console.php');
}
}
Step 4: Test-run the schedule to see if it will run using:
php artisan schedule:run
Step 5: Finally, we need to add a single cron entry on the server that will take care of all our schedules from the Laravel application.
Type the following commands on the SSH terminal:
a. crontab -e. If this is the first time you are configuring cron on the server, it will prompt for the editor to use.
b. * * * * * /usr/bin/php /var/www/html/your_laravel_app/artisan schedule:run > /tmp/cron_log
This is a directive that runs the cron daemon every minute, checks every schedule you defined under Kernel.php, executes it and dump a log file in the tmp folder for analysis.
Cron will not give information whether or not its commands run successfully, so the only way to troubleshoot is by having a log file.
c. Restart the service by typing:
sudo service cron reload
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