<?php
if (!defined('ABSPATH')) exit;
abstract class ActionScheduler_Lock {
private static $locker = NULL;
protected static $lock_duration = MINUTE_IN_SECONDS;
public function is_locked( $lock_type ) {
return ( $this->get_expiration( $lock_type ) >= time() );
}
abstract public function set( $lock_type );
abstract public function get_expiration( $lock_type );
protected function get_duration( $lock_type ) {
return apply_filters( 'action_scheduler_lock_duration', self::$lock_duration, $lock_type );
}
public static function instance() {
if ( empty( self::$locker ) ) {
$class = apply_filters( 'action_scheduler_lock_class', 'ActionScheduler_OptionLock' );
self::$locker = new $class();
}
return self::$locker;
}
}