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<?php
namespace Illuminate\Queue;
use DateTime;
use Carbon\Carbon;
use Illuminate\Database\Connection;
use Illuminate\Queue\Jobs\DatabaseJob;
use Illuminate\Contracts\Queue\Queue as QueueContract;
class DatabaseQueue extends Queue implements QueueContract
{
/**
* The database connection instance.
*
* @var \Illuminate\Database\Connection
*/
protected $database;
/**
* The database table that holds the jobs.
*
* @var string
*/
protected $table;
/**
* The name of the default queue.
*
* @var string
*/
protected $default;
/**
* The expiration time of a job.
*
* @var int|null
*/
protected $expire = 60;
/**
* Create a new database queue instance.
*
* @param \Illuminate\Database\Connection $database
* @param string $table
* @param string $default
* @param int $expire
* @return void
*/
public function __construct(Connection $database, $table, $default = 'default', $expire = 60)
{
$this->table = $table;
$this->expire = $expire;
$this->default = $default;
$this->database = $database;
}
/**
* Push a new job onto the queue.
*
* @param string $job
* @param mixed $data
* @param string $queue
* @return mixed
*/
public function push($job, $data = '', $queue = null)
{
return $this->pushToDatabase(0, $queue, $this->createPayload($job, $data));
}
/**
* Push a raw payload onto the queue.
*
* @param string $payload
* @param string $queue
* @param array $options
* @return mixed
*/
public function pushRaw($payload, $queue = null, array $options = [])
{
return $this->pushToDatabase(0, $queue, $payload);
}
/**
* Push a new job onto the queue after a delay.
*
* @param \DateTime|int $delay
* @param string $job
* @param mixed $data
* @param string $queue
* @return void
*/
public function later($delay, $job, $data = '', $queue = null)
{
return $this->pushToDatabase($delay, $queue, $this->createPayload($job, $data));
}
/**
* Push an array of jobs onto the queue.
*
* @param array $jobs
* @param mixed $data
* @param string $queue
* @return mixed
*/
public function bulk($jobs, $data = '', $queue = null)
{
$queue = $this->getQueue($queue);
$availableAt = $this->getAvailableAt(0);
$records = array_map(function ($job) use ($queue, $data, $availableAt) {
return $this->buildDatabaseRecord(
$queue, $this->createPayload($job, $data), $availableAt
);
}, (array) $jobs);
return $this->database->table($this->table)->insert($records);
}
/**
* Release a reserved job back onto the queue.
*
* @param string $queue
* @param \StdClass $job
* @param int $delay
* @return mixed
*/
public function release($queue, $job, $delay)
{
return $this->pushToDatabase($delay, $queue, $job->payload, $job->attempts);
}
/**
* Push a raw payload to the database with a given delay.
*
* @param \DateTime|int $delay
* @param string|null $queue
* @param string $payload
* @param int $attempts
* @return mixed
*/
protected function pushToDatabase($delay, $queue, $payload, $attempts = 0)
{
$attributes = $this->buildDatabaseRecord(
$this->getQueue($queue), $payload, $this->getAvailableAt($delay), $attempts
);
return $this->database->table($this->table)->insertGetId($attributes);
}
/**
* Pop the next job off of the queue.
*
* @param string $queue
* @return \Illuminate\Contracts\Queue\Job|null
*/
public function pop($queue = null)
{
$queue = $this->getQueue($queue);
$this->database->beginTransaction();
if ($job = $this->getNextAvailableJob($queue)) {
$job = $this->markJobAsReserved($job);
$this->database->commit();
return new DatabaseJob(
$this->container, $this, $job, $queue
);
}
$this->database->commit();
}
/**
* Get the next available job for the queue.
*
* @param string|null $queue
* @return \StdClass|null
*/
protected function getNextAvailableJob($queue)
{
$job = $this->database->table($this->table)
->lockForUpdate()
->where('queue', $this->getQueue($queue))
->where(function ($query) {
$this->isAvailable($query);
$this->isReservedButExpired($query);
})
->orderBy('id', 'asc')
->first();
return $job ? (object) $job : null;
}
/**
* Modify the query to check for available jobs.
*
* @param \Illuminate\Database\Query\Builder $query
* @return void
*/
protected function isAvailable($query)
{
$query->where(function ($query) {
$query->where('reserved', 0);
$query->where('available_at', '<=', $this->getTime());
});
}
/**
* Modify the query to check for jobs that are reserved but have expired.
*
* @param \Illuminate\Database\Query\Builder $query
* @return void
*/
protected function isReservedButExpired($query)
{
$expiration = Carbon::now()->subSeconds($this->expire)->getTimestamp();
$query->orWhere(function ($query) use ($expiration) {
$query->where('reserved', 1);
$query->where('reserved_at', '<=', $expiration);
});
}
/**
* Mark the given job ID as reserved.
*
* @param \stdClass $job
* @return \stdClass
*/
protected function markJobAsReserved($job)
{
$job->reserved = 1;
$job->attempts = $job->attempts + 1;
$job->reserved_at = $this->getTime();
$this->database->table($this->table)->where('id', $job->id)->update([
'reserved' => $job->reserved,
'reserved_at' => $job->reserved_at,
'attempts' => $job->attempts,
]);
return $job;
}
/**
* Delete a reserved job from the queue.
*
* @param string $queue
* @param string $id
* @return void
*/
public function deleteReserved($queue, $id)
{
$this->database->beginTransaction();
if ($this->database->table($this->table)->lockForUpdate()->find($id)) {
$this->database->table($this->table)->where('id', $id)->delete();
}
$this->database->commit();
}
/**
* Get the "available at" UNIX timestamp.
*
* @param \DateTime|int $delay
* @return int
*/
protected function getAvailableAt($delay)
{
$availableAt = $delay instanceof DateTime ? $delay : Carbon::now()->addSeconds($delay);
return $availableAt->getTimestamp();
}
/**
* Create an array to insert for the given job.
*
* @param string|null $queue
* @param string $payload
* @param int $availableAt
* @param int $attempts
* @return array
*/
protected function buildDatabaseRecord($queue, $payload, $availableAt, $attempts = 0)
{
return [
'queue' => $queue,
'attempts' => $attempts,
'reserved' => 0,
'reserved_at' => null,
'available_at' => $availableAt,
'created_at' => $this->getTime(),
'payload' => $payload,
];
}
/**
* Get the queue or return the default.
*
* @param string|null $queue
* @return string
*/
protected function getQueue($queue)
{
return $queue ?: $this->default;
}
/**
* Get the underlying database instance.
*
* @return \Illuminate\Database\Connection
*/
public function getDatabase()
{
return $this->database;
}
/**
* Get the expiration time in seconds.
*
* @return int|null
*/
public function getExpire()
{
return $this->expire;
}
/**
* Set the expiration time in seconds.
*
* @param int|null $seconds
* @return void
*/
public function setExpire($seconds)
{
$this->expire = $seconds;
}
}