Handle signals in Artisan commands
Using this package you can easily handle signals like SIGINT, SIGTERM in your Laravel app.
Here's a quick example where the SIGINT signal is handled.
use Spatie\SignalAwareCommand\SignalAwareCommand;
class YourCommand extends SignalAwareCommand
{
protected $signature = 'your-command';
public function handle()
{
$this->info('Command started...');
sleep(100);
}
public function onSigint()
{
// will be executed when you stop the command
$this->info('You stopped the command!');
}
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Installation
You can install the package via composer:
composer require spatie/laravel-signal-aware-commandUsage
In order to make an Artisan command signal aware you need to let it extend SignalAwareCommand.
use Spatie\SignalAwareCommand\SignalAwareCommand;
class YourCommand extends SignalAwareCommand
{
// your code
}Handling signals
There are three ways to handle signals:
- on the command itself
- via the
Signalfacade - using the
SignalReceivedevent
On the command
To handle signals on the command itself, you need to let your command extend SignalAwareCommand. Next, define a method that starts with on followed by the name of the signal. Here's an example where the SIGINT signal is handled.
use Spatie\SignalAwareCommand\SignalAwareCommand;
class YourCommand extends SignalAwareCommand
{
protected $signature = 'your-command';
public function handle()
{
$this->info('Command started...');
sleep(100);
}
public function onSigint()
{
// will be executed when you stop the command
$this->info('You stopped the command!');
}
}Via the Signal facade
Using the Signal facade you can register signal handling code anywhere in your app.
First, you need to define the signals you want to handle in your command in the handlesSignals property.
use Spatie\SignalAwareCommand\SignalAwareCommand;
class YourCommand extends SignalAwareCommand
{
protected $signature = 'your-command';
protected $handlesSignals = [SIGINT];
public function handle()
{
(new SomeOtherClass())->performSomeWork();
sleep(100);
}
}In any class you'd like you can use the Signal facade to register code that should be executed when a signal is received.
use Illuminate\Console\Command;
use Spatie\SignalAwareCommand\Facades\Signal;
class SomeOtherClass
{
public function performSomeWork()
{
Signal::handle(SIGINT, function(Command $commandThatReceivedSignal) {
$commandThatReceivedSignal->info('Received the SIGINT signal!');
})
}
}You can call clearHandlers if you want to remove a handler that was previously registered.
use Spatie\SignalAwareCommand\Facades\Signal;
public function performSomeWork()
{
Signal::handle(SIGNINT, function() {
// perform cleanup
});
$this->doSomeWork();
// at this point doSomeWork was executed without any problems
// running a cleanup isn't necessary anymore
Signal::clearHandlers(SIGINT);
}To clear all handlers for all signals use Signal::clearHandlers().
Using the SignalReceived event
Whenever a signal is received, the Spatie\SignalAwareCommand\Events\SignalReceived event is fired.
To register which events you want to receive you must define a handlesSignals property on your command. Here's an example where we register listening for the SIGINT signal.
use Spatie\SignalAwareCommand\SignalAwareCommand
class YourCommand extends SignalAwareCommand
{
protected $signature = 'your-command';
protected $handlesSignals = [SIGINT];
public function handle()
{
(new SomeOtherClass())->performSomeWork();
sleep(100);
}
}In any class you'd like you can listen for the SignalReceived event.
use Spatie\SignalAwareCommand\Events\SignalReceived;
use Spatie\SignalAwareCommand\Signals;
class SomeOtherClass
{
public function performSomeWork()
{
Event::listen(function(SignalReceived $event) {
$signalNumber = $event->signal;
$signalName = Signals::getSignalName($signalNumber);
$event->command->info("Received the {$signalName} signal");
});
}
}Learn how this package was built
The foundations of this pacakge were coded up in this live stream on YouTube.
Testing
composer testChangelog
Please see CHANGELOG for more information on what has changed recently.
Contributing
Please see CONTRIBUTING for details.
Security Vulnerabilities
Please review our security policy on how to report security vulnerabilities.
Credits
License
The MIT License (MIT). Please see License File for more information.