Current File : /var/www/html/conference/vendor/laravel/framework/src/Illuminate/Queue/Listener.php
<?php
namespace Illuminate\Queue;
use Closure;
use Illuminate\Support\ProcessUtils;
use Symfony\Component\Process\Process;
use Symfony\Component\Process\PhpExecutableFinder;
class Listener
{
/**
* The command working path.
*
* @var string
*/
protected $commandPath;
/**
* The environment the workers should run under.
*
* @var string
*/
protected $environment;
/**
* The amount of seconds to wait before polling the queue.
*
* @var int
*/
protected $sleep = 3;
/**
* The amount of times to try a job before logging it failed.
*
* @var int
*/
protected $maxTries = 0;
/**
* The queue worker command line.
*
* @var string
*/
protected $workerCommand;
/**
* The output handler callback.
*
* @var \Closure|null
*/
protected $outputHandler;
/**
* Create a new queue listener.
*
* @param string $commandPath
* @return void
*/
public function __construct($commandPath)
{
$this->commandPath = $commandPath;
$this->workerCommand = $this->buildCommandTemplate();
}
/**
* Build the environment specific worker command.
*
* @return string
*/
protected function buildCommandTemplate()
{
$command = 'queue:work %s --once --queue=%s --delay=%s --memory=%s --sleep=%s --tries=%s';
return "{$this->phpBinary()} {$this->artisanBinary()} {$command}";
}
/**
* Get the PHP binary.
*
* @return string
*/
protected function phpBinary()
{
return ProcessUtils::escapeArgument(
(new PhpExecutableFinder)->find(false)
);
}
/**
* Get the Artisan binary.
*
* @return string
*/
protected function artisanBinary()
{
return defined('ARTISAN_BINARY')
? ProcessUtils::escapeArgument(ARTISAN_BINARY)
: 'artisan';
}
/**
* Listen to the given queue connection.
*
* @param string $connection
* @param string $queue
* @param \Illuminate\Queue\ListenerOptions $options
* @return void
*/
public function listen($connection, $queue, ListenerOptions $options)
{
$process = $this->makeProcess($connection, $queue, $options);
while (true) {
$this->runProcess($process, $options->memory);
}
}
/**
* Create a new Symfony process for the worker.
*
* @param string $connection
* @param string $queue
* @param \Illuminate\Queue\ListenerOptions $options
* @return \Symfony\Component\Process\Process
*/
public function makeProcess($connection, $queue, ListenerOptions $options)
{
$command = $this->workerCommand;
// If the environment is set, we will append it to the command string so the
// workers will run under the specified environment. Otherwise, they will
// just run under the production environment which is not always right.
if (isset($options->environment)) {
$command = $this->addEnvironment($command, $options);
}
// Next, we will just format out the worker commands with all of the various
// options available for the command. This will produce the final command
// line that we will pass into a Symfony process object for processing.
$command = $this->formatCommand(
$command, $connection, $queue, $options
);
return new Process(
$command, $this->commandPath, null, null, $options->timeout
);
}
/**
* Add the environment option to the given command.
*
* @param string $command
* @param \Illuminate\Queue\ListenerOptions $options
* @return string
*/
protected function addEnvironment($command, ListenerOptions $options)
{
return $command.' --env='.ProcessUtils::escapeArgument($options->environment);
}
/**
* Format the given command with the listener options.
*
* @param string $command
* @param string $connection
* @param string $queue
* @param \Illuminate\Queue\ListenerOptions $options
* @return string
*/
protected function formatCommand($command, $connection, $queue, ListenerOptions $options)
{
return sprintf(
$command,
ProcessUtils::escapeArgument($connection),
ProcessUtils::escapeArgument($queue),
$options->delay, $options->memory,
$options->sleep, $options->maxTries
);
}
/**
* Run the given process.
*
* @param \Symfony\Component\Process\Process $process
* @param int $memory
* @return void
*/
public function runProcess(Process $process, $memory)
{
$process->run(function ($type, $line) {
$this->handleWorkerOutput($type, $line);
});
// Once we have run the job we'll go check if the memory limit has been exceeded
// for the script. If it has, we will kill this script so the process manager
// will restart this with a clean slate of memory automatically on exiting.
if ($this->memoryExceeded($memory)) {
$this->stop();
}
}
/**
* Handle output from the worker process.
*
* @param int $type
* @param string $line
* @return void
*/
protected function handleWorkerOutput($type, $line)
{
if (isset($this->outputHandler)) {
call_user_func($this->outputHandler, $type, $line);
}
}
/**
* Determine if the memory limit has been exceeded.
*
* @param int $memoryLimit
* @return bool
*/
public function memoryExceeded($memoryLimit)
{
return (memory_get_usage() / 1024 / 1024) >= $memoryLimit;
}
/**
* Stop listening and bail out of the script.
*
* @return void
*/
public function stop()
{
die;
}
/**
* Set the output handler callback.
*
* @param \Closure $outputHandler
* @return void
*/
public function setOutputHandler(Closure $outputHandler)
{
$this->outputHandler = $outputHandler;
}
}
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