Laravel schedular: execute a command every second - php

Question

I have a project that needs to send notifications via WebSockets continuously. It should connect to a device that returns the overall status in string format. The system processes it and then sends notifications based on various conditions.
Since the scheduler can repeat a task as early as a minute, I need to find a way to execute the function every second.
Here is my app/Console/Kernel.php:
<?php
...
class Kernel extends ConsoleKernel
{
...
protected function schedule(Schedule $schedule)
{
$schedule->call(function(){
// connect to the device and process its response
})->everyMinute();
}
}
PS: If you have a better idea to handle the situation, please share your thoughts.

Answer 1

Usually, when you want more granularity than 1 minute, you have to write a daemon.
I advise you to try, now it's not so hard as it was some years ago. Just start with a simple loop inside a CLI command:
while (true) {
doPeriodicStuff();
sleep(1);
}
One important thing: run the daemon via supervisord. You can take a look at articles about Laravel's queue listener setup, it uses the same approach (a daemon + supervisord). A config section can look like this:
[program:your_daemon]
command=php artisan your:command --env=your_environment
directory=/path/to/laravel
stdout_logfile=/path/to/laravel/app/storage/logs/your_command.log
redirect_stderr=true
autostart=true
autorestart=true

Answer 2

for per second you can add command to cron job
* * * * * /usr/local/php56/bin/php56 /home/hamshahr/domains/hamshahrapp.com/project/artisan taxis:beFreeTaxis 1>> /dev/null 2>&1
and in command :
<?php
namespace App\Console\Commands;
use App\Contracts\Repositories\TaxiRepository;
use App\Contracts\Repositories\TravelRepository;
use App\Contracts\Repositories\TravelsRequestsDriversRepository;
use Carbon\Carbon;
use Illuminate\Console\Command;
class beFreeRequest extends Command
{
/**
* The name and signature of the console command.
*
* #var string
*/
protected $signature = 'taxis:beFreeRequest';
/**
* The console command description.
*
* #var string
*/
protected $description = 'change is active to 0 after 1 min if yet is 1';
/**
* #var TravelsRequestsDriversRepository
*/
private $travelsRequestsDriversRepository;
/**
* Create a new command instance.
* #param TravelsRequestsDriversRepository $travelsRequestsDriversRepository
*/
public function __construct(
TravelsRequestsDriversRepository $travelsRequestsDriversRepository
)
{
parent::__construct();
$this->travelsRequestsDriversRepository = $travelsRequestsDriversRepository;
}
/**
* Execute the console command.
*
* #return mixed
*/
public function handle()
{
$count = 0;
while ($count < 59) {
$startTime = Carbon::now();
$this->travelsRequestsDriversRepository->beFreeRequestAfterTime();
$endTime = Carbon::now();
$totalDuration = $endTime->diffInSeconds($startTime);
if($totalDuration > 0) {
$count += $totalDuration;
}
else {
$count++;
}
sleep(1);
}
}
}

Answer 3

$schedule->call(function(){
while (some-condition) {
runProcess();
}
})->name("someName")->withoutOverlapping();
Depending on how long your runProcess() takes to execute, you can use sleep(seconds) to have more fine tuning.
some-condition is normally a flag that you can change any time to have control on the infinite loop. e.g. you can use file_exists(path-to-flag-file) to manually start or stop the process any time you need.

Answer 4

this might be a bit old question but i recommend you to take a look at
laravel-short-schedule package from spatie
it allows you to run a commands at sub-minute or even sub-second

Answer 5

You can try and duplicate the jobs every second * 60 times using sleep(1).