<?php
/**
* Classes for Background and Async processing.
*
* This file contains classes and methods that extend \SWIS\Background_Process and
* \SWIS\Async_Request to allow parallel and background processing of images.
*
* @link https://ewww.io
* @package EWWW_Image_Optimizer
*/
namespace SWIS;
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* The (grand)parent \SWIS\Async_Request class file.
*/
require_once( SWIS_PLUGIN_PATH . 'vendor/wp-async-request.php' );
/**
* The parent \SWIS\Background_Process class file.
*/
require_once( SWIS_PLUGIN_PATH . 'includes/class-background-process.php' );
/**
* Processes cache preloading in background/async mode.
*
* @see Background_Process
*/
class Cache_Preload_Background extends Background_Process {
/**
* The action name used to trigger this class extension.
*
* @access protected
* @var string $action
*/
protected $action = 'cache_preload';
/**
* The queue name for this class extension.
*
* @access protected
* @var string $action
*/
protected $active_queue = 'swis_cache_preload';
/**
* Runs task for an item from the preloader queue.
*
* @access protected
*
* @param array $item The id of the post/page.
* @return bool|array If the item is not complete, return it. False indicates completion.
*/
protected function task( $item ) {
session_write_close();
$url = $item['page_url'];
swis()->settings->debug_message( "background preloading $url" );
swis()->cache_preload->preload( $url );
return false;
}
/**
* Runs failure routine for cache preload (maybe not).
*
* @access protected
*
* @param array $item The id of the page and how many attempts have been made.
*/
protected function failure( $item ) {
// TODO: not sure we will even bother detecting failures...
return;
}
}