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<?php
namespace Laravel\Horizon;
use Illuminate\Contracts\Queue\Factory as QueueFactory;
use Illuminate\Support\Str;
use Laravel\Horizon\Contracts\MetricsRepository;
use Laravel\Horizon\Contracts\SupervisorRepository;
class WaitTimeCalculator
{
/**
* The queue factory implementation.
*
* @var \Illuminate\Contracts\Queue\Factory
*/
public $queue;
/**
* The supervisor repository implementation.
*
* @var \Laravel\Horizon\Contracts\SupervisorRepository
*/
public $supervisors;
/**
* The metrics repository implementation.
*
* @var \Laravel\Horizon\Contracts\MetricsRepository
*/
public $metrics;
/**
* Create a new calculator instance.
*
* @param \Illuminate\Contracts\Queue\Factory $queue
* @param \Laravel\Horizon\Contracts\SupervisorRepository $supervisors
* @param \Laravel\Horizon\Contracts\MetricsRepository $metrics
* @return void
*/
public function __construct(QueueFactory $queue,
SupervisorRepository $supervisors,
MetricsRepository $metrics)
{
$this->queue = $queue;
$this->metrics = $metrics;
$this->supervisors = $supervisors;
}
/**
* Calculate the time to clear a given queue in seconds.
*
* @param string $queue
* @return float
*/
public function calculateFor($queue)
{
return array_values($this->calculate($queue))[0] ?? 0;
}
/**
* Calculate the time to clear per queue in seconds.
*
* @param string|null $queue
* @return array
*/
public function calculate($queue = null)
{
$queues = $this->queueNames(
$supervisors = collect($this->supervisors->all()), $queue
);
return $queues->mapWithKeys(function ($queue) use ($supervisors) {
$totalProcesses = $this->totalProcessesFor($supervisors, $queue);
[$connection, $queueName] = explode(':', $queue, 2);
return [$queue => $this->calculateTimeToClear($connection, $queueName, $totalProcesses)];
})->sort()->reverse()->all();
}
/**
* Get all of the queue names.
*
* @param \Illuminate\Support\Collection $supervisors
* @param string|null $queue
* @return \Illuminate\Support\Collection
*/
protected function queueNames($supervisors, $queue = null)
{
$queues = $supervisors->map(function ($supervisor) {
return array_keys($supervisor->processes);
})->collapse()->unique()->values();
return $queue ? $queues->intersect([$queue]) : $queues;
}
/**
* Get the total process count for a given queue.
*
* @param \Illuminate\Support\Collection $allSupervisors
* @param string $queue
* @return int
*/
protected function totalProcessesFor($allSupervisors, $queue)
{
return $allSupervisors->sum(function ($supervisor) use ($queue) {
return $supervisor->processes[$queue] ?? 0;
});
}
/**
* Calculate the time to clear for the given queue in seconds distributed over the given amount of processes.
*
* @param string $connection
* @param string $queue
* @param int $totalProcesses
* @return int
*/
public function calculateTimeToClear($connection, $queue, $totalProcesses)
{
$timeToClear = ! Str::contains($queue, ',')
? $this->timeToClearFor($connection, $queue)
: collect(explode(',', $queue))->sum(function ($queueName) use ($connection) {
return $this->timeToClearFor($connection, $queueName);
});
return $totalProcesses === 0
? round($timeToClear / 1000)
: round(($timeToClear / $totalProcesses) / 1000);
}
/**
* Get the total time to clear (in milliseconds) for a given queue.
*
* @param string $connection
* @param string $queue
* @return float
*/
protected function timeToClearFor($connection, $queue)
{
$size = $this->queue->connection($connection)->readyNow($queue);
return $size * $this->metrics->runtimeForQueue($queue);
}
}