<?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
      * @param  string|object  $job
      * @param  mixed   $data
      * @return mixed
      */
     public function laterOn($queue, $delay, $job, $data = '');
 
     /**
      * Push an array of jobs onto the queue.
      *
      * @param  array   $jobs
      * @param  mixed   $data
      * @param  string|null  $queue
      * @return mixed
      */
     public function bulk($jobs, $data = '', $queue = null);
 
     /**
      * Pop the next job off of the queue.
      *
      * @param  string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null);
 
     /**
      * Get the connection name for the queue.
      *
      * @return string
      */
     public function getConnectionName();
 
     /**
      * Set the connection name for the queue.
      *
      * @param  string  $name
      * @return $this
      */
     public function setConnectionName($name);
 }