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<?php |
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namespace WP_Queue; |
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class Cron { |
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/** |
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* @var string |
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*/ |
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protected $id; |
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/** |
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* @var Worker |
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*/ |
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protected $worker; |
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/** |
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* @var int |
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*/ |
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protected $interval; |
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/** |
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* Timestamp of when processing the queue started. |
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* |
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* @var int |
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*/ |
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protected $start_time; |
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/** |
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* Cron constructor. |
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* |
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* @param string $id |
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* @param Worker $worker |
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* @param int $interval |
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*/ |
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public function __construct( $id, $worker, $interval ) { |
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$this->id = strtolower( str_replace( '\\', '_', $id ) ); |
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$this->worker = $worker; |
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$this->interval = $interval; |
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} |
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/** |
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* Is the cron queue worker enabled? |
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* |
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* @return bool |
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*/ |
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protected function is_enabled() { |
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if ( defined( 'DISABLE_WP_QUEUE_CRON' ) && DISABLE_WP_QUEUE_CRON ) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Init cron class. |
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* |
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* @return bool |
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*/ |
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public function init() { |
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if ( ! $this->is_enabled() ) { |
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return false; |
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} |
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add_filter( 'cron_schedules', array( $this, 'schedule_cron' ) ); |
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add_action( $this->id, array( $this, 'cron_worker' ) ); |
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if ( ! wp_next_scheduled( $this->id ) ) { |
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// Schedule health check |
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wp_schedule_event( time(), $this->id, $this->id ); |
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} |
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return true; |
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} |
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/** |
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* Add interval to cron schedules. |
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* |
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* @param array $schedules |
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* |
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* @return array |
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*/ |
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public function schedule_cron( $schedules ) { |
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$schedules[ $this->id ] = array( |
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'interval' => MINUTE_IN_SECONDS * $this->interval, |
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'display' => sprintf( __( 'Every %d Minutes' ), $this->interval ), |
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); |
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return $schedules; |
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} |
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/** |
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* Process any jobs in the queue. |
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*/ |
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public function cron_worker() { |
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if ( $this->is_worker_locked() ) { |
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return; |
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} |
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$this->start_time = time(); |
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$this->lock_worker(); |
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while ( ! $this->time_exceeded() && ! $this->memory_exceeded() ) { |
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if ( ! $this->worker->process() ) { |
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break; |
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} |
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} |
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$this->unlock_worker(); |
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} |
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/** |
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* Is the cron worker locked? |
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* |
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* @return bool |
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*/ |
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protected function is_worker_locked() { |
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return (bool) get_site_transient( $this->id ); |
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} |
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/** |
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* Lock the cron worker. |
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*/ |
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protected function lock_worker() { |
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set_site_transient( $this->id, time(), 300 ); |
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} |
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/** |
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* Unlock the cron worker. |
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*/ |
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protected function unlock_worker() { |
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delete_site_transient( $this->id ); |
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} |
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/** |
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* Memory exceeded |
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* |
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* Ensures the worker process never exceeds 80% |
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* of the maximum allowed PHP memory. |
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* |
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* @return bool |
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*/ |
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protected function memory_exceeded() { |
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$memory_limit = $this->get_memory_limit() * 0.8; // 80% of max memory |
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$current_memory = memory_get_usage( true ); |
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$return = false; |
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if ( $current_memory >= $memory_limit ) { |
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$return = true; |
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} |
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return apply_filters( 'wp_queue_cron_memory_exceeded', $return ); |
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} |
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/** |
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* Get memory limit. |
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* |
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* @return int |
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*/ |
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protected function get_memory_limit() { |
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if ( function_exists( 'ini_get' ) ) { |
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$memory_limit = ini_get( 'memory_limit' ); |
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} else { |
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$memory_limit = '256M'; |
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} |
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if ( ! $memory_limit || - 1 == $memory_limit ) { |
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// Unlimited, set to 1GB |
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$memory_limit = '1000M'; |
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} |
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return intval( $memory_limit ) * 1024 * 1024; |
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} |
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/** |
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* Time exceeded |
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* |
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* Ensures the worker never exceeds a sensible time limit (20s by default). |
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* A timeout limit of 30s is common on shared hosting. |
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* |
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* @return bool |
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*/ |
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protected function time_exceeded() { |
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$finish = $this->start_time + apply_filters( 'wp_queue_cron_time_limit', 20 ); // 20 seconds |
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$return = false; |
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if ( time() >= $finish ) { |
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$return = true; |
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} |
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return apply_filters( 'wp_queue_cron_time_exceeded', $return ); |
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} |
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} |
A5hleyRich /
wp-queue
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