vendor/illuminate/contracts/Queue/Queue.php

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<?php

namespace Illuminate\Contracts\Queue;

interface Queue
{
    /**
     * Get the size of the queue.
     *
     * @param  string|null  $queue
     * @return int
     */
    public function size($queue = null);

    /**
     * Push a new job onto the queue.
     *
     * @param  string|object  $job
     * @param  mixed   $data
     * @param  string|null  $queue
     * @return mixed
     */
    public function push($job, $data = '', $queue = null);

    /**
     * Push a new job onto the queue.
     *
     * @param  string  $queue
     * @param  string|object  $job
     * @param  mixed   $data
     * @return mixed
     */
    public function pushOn($queue, $job, $data = '');

    /**
     * Push a raw payload onto the queue.
     *
     * @param  string  $payload
     * @param  string|null  $queue
     * @param  array   $options
     * @return mixed
     */
    public function pushRaw($payload, $queue = null, array $options = []);

    /**
     * Push a new job onto the queue after a delay.
     *
     * @param  \DateTimeInterface|\DateInterval|int  $delay
     * @param  string|object  $job
     * @param  mixed   $data
     * @param  string|null  $queue
     * @return mixed
     */
    public function later($delay, $job, $data = '', $queue = null);

    /**
     * Push a new job onto the queue after a delay.
     *
     * @param  string  $queue
     * @param  \DateTimeInterface|\DateInterval|int  $delay