Laravel 配置中的队列排序

Question

I know that queue in jobs is where you set the priority of the job, like when I run the command and specifying the queue ordering like this:

php artisan queue:listen --queue=High,Mid,Low

But in Laravel queue config queue.php file there is a queue key in every driver array, ie:

    'database' => [
            'driver' => 'database',
            'table' => 'jobs',
            // this one
            'queue' => 'default',
            'retry_after' => 90,
        ],

What this have to do with jobs? I've never seen someone changing this! I am not seeing exactly what it is or what it has to do with the jobs in Laravel Doc , what the effect of changing this? and can it be an array of queues or just a string?

Answer 1

When you do this;

Queue::pushOn('high', new FooJob());

It is going to push into the queue named high . You may change it to mid or low . If your queue driver is redis, then it is going to be like these after you push them.

127.0.0.1:6379> keys *
1) "queues:high"
2) "queues:low"
3) "queues:mid"

If you want to consume these queues you need to execute the following command as you already mentioned;

php artisan queue:listen --queue=High,Mid,Low

If you don't explicitly define any queue while pushing such as;

Queue::push(new FooJob());
Queue::later(86400, new FooJob());

then it is going to use the default as default since you didn't explicitly define it while pushing.

127.0.0.1:6379> keys *
1) "queues:default"
2) "queues:default:delayed"

Then you may execute only to listen default queues.

php artisan queue:listen

For your last question, it has to be string. This is the method from RedisQueue class.

/**
 * Get the queue or return the default.
 *
 * @param  string|null  $queue
 * @return string
 */
protected function getQueue($queue)
{
    return 'queues:'.($queue ?: $this->default);
}