622 lines
15 KiB
PHP
622 lines
15 KiB
PHP
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<?php defined('SYSPATH') or die('No direct script access.');
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/**
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* @package Cron
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*
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* @author Chris Bandy
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* @copyright (c) 2010 Chris Bandy
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* @license http://www.opensource.org/licenses/isc-license.txt
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*/
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class Kohana_Cron
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{
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protected static $_jobs = array();
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protected static $_times = array();
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/**
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* Registers a job to be run
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*
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* @param string Unique name
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* @param array|Cron Job to run
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*/
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public static function set($name, $job)
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{
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if (is_array($job))
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{
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$job = new Cron(reset($job), next($job));
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}
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Cron::$_jobs[$name] = $job;
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}
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/**
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* Retrieve the timestamps of when jobs should run
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*/
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protected static function _load()
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{
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Cron::$_times = Kohana::cache("Cron::run()");
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}
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/**
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* Acquire the Cron mutex
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*
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* @return boolean
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*/
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protected static function _lock()
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{
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$config = Kohana::$config->load('cron');
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$result = FALSE;
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if (file_exists($config->lock) AND ($stat = @stat($config->lock)) AND time() - $config->window < $stat['mtime'])
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{
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// Lock exists and has not expired
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return $result;
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}
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$fh = fopen($config->lock, 'a');
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if (flock($fh, LOCK_EX))
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{
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fseek($fh, 0, SEEK_END);
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if (ftell($fh) === (empty($stat) ? 0 : $stat['size']))
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{
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// Current size matches expected size
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// Claim the file by changing the size
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fwrite($fh, '.');
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$result = TRUE;
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}
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// else, Another process acquired during flock()
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}
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fclose($fh);
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return $result;
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}
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/**
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* Store the timestamps of when jobs should run next
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*/
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protected static function _save()
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{
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Kohana::cache("Cron::run()", Cron::$_times, Kohana::$config->load('cron')->window * 2);
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}
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/**
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* Release the Cron mutex
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*/
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protected static function _unlock()
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{
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return @unlink(Kohana::$config->load('cron')->lock);
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}
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/**
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* @return boolean FALSE when another instance is running
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*/
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public static function run()
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{
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if (empty(Cron::$_jobs))
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return TRUE;
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if ( ! Cron::_lock())
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return FALSE;
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try
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{
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Cron::_load();
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$now = time();
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$threshold = $now - Kohana::$config->load('cron')->window;
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foreach (Cron::$_jobs as $name => $job)
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{
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if (empty(Cron::$_times[$name]) OR Cron::$_times[$name] < $threshold)
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{
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// Expired
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Cron::$_times[$name] = $job->next($now);
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if ($job->next($threshold) < $now)
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{
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// Within the window
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$job->execute();
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}
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}
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elseif (Cron::$_times[$name] < $now)
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{
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// Within the window
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Cron::$_times[$name] = $job->next($now);
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$job->execute();
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}
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}
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}
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catch (Exception $e) {}
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Cron::_save();
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Cron::_unlock();
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if (isset($e))
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throw $e;
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return TRUE;
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}
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protected $_callback;
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protected $_period;
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public function __construct($period, $callback)
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{
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$this->_period = $period;
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$this->_callback = $callback;
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}
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/**
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* Execute this job
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*/
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public function execute()
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{
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call_user_func($this->_callback);
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}
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/**
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* Calculates the next timestamp in this period
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*
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* @param integer Timestamp from which to calculate
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* @return integer Next timestamp in this period
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*/
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public function next($from)
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{
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// PHP >= 5.3.0
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//if ($this->_period instanceof DatePeriod) { return; }
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//if (is_string($this->_period) AND preg_match('/^P[\dDHMSTWY]+$/', $period)) { $this->_period = new DateInterval($this->_period); }
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//if ($this->_period instanceof DateInterval) { return; }
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return $this->_next_crontab($from);
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}
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/**
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* Calculates the next timestamp of this crontab period
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*
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* @param integer Timestamp from which to calculate
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* @return integer Next timestamp in this period
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*/
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protected function _next_crontab($from)
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{
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if (is_string($this->_period))
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{
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// Convert string to lists of valid values
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if ($this->_period[0] === '@')
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{
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switch (substr($this->_period, 1))
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{
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case 'annually':
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case 'yearly':
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// '0 0 1 1 *'
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$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => array(1), 'months' => array(1), 'weekdays' => range(0,6));
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break;
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case 'daily':
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case 'midnight':
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// '0 0 * * *'
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$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => range(1,31), 'months' => range(1,12), 'weekdays' => range(0,6));
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break;
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case 'hourly':
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// '0 * * * *'
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$this->_period = array('minutes' => array(0), 'hours' => range(0,23), 'monthdays' => range(1,31), 'months' => range(1,12), 'weekdays' => range(0,6));
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break;
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case 'monthly':
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// '0 0 1 * *'
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$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => array(1), 'months' => range(1,12), 'weekdays' => range(0,6));
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break;
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case 'weekly':
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// '0 0 * * 0'
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$this->_period = array('minutes' => array(0), 'hours' => array(0), 'monthdays' => range(1,31), 'months' => range(1,12), 'weekdays' => array(0));
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break;
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}
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}
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else
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{
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list($minutes, $hours, $monthdays, $months, $weekdays) = explode(' ', $this->_period);
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$months = strtr(strtolower($months), array(
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'jan' => 1,
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'feb' => 2,
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'mar' => 3,
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'apr' => 4,
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'may' => 5,
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'jun' => 6,
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'jul' => 7,
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'aug' => 8,
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'sep' => 9,
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'oct' => 10,
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'nov' => 11,
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'dec' => 12,
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));
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$weekdays = strtr(strtolower($weekdays), array(
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'sun' => 0,
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'mon' => 1,
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'tue' => 2,
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'wed' => 3,
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'thu' => 4,
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'fri' => 5,
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'sat' => 6,
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));
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$this->_period = array(
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'minutes' => $this->_parse_crontab_field($minutes, 0, 59),
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'hours' => $this->_parse_crontab_field($hours, 0, 23),
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'monthdays' => $this->_parse_crontab_field($monthdays, 1, 31),
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'months' => $this->_parse_crontab_field($months, 1, 12),
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'weekdays' => $this->_parse_crontab_field($weekdays, 0, 7)
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);
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// Ensure Sunday is zero
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if (end($this->_period['weekdays']) === 7)
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{
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array_pop($this->_period['weekdays']);
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if (reset($this->_period['weekdays']) !== 0)
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{
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array_unshift($this->_period['weekdays'], 0);
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}
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}
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}
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}
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$from = getdate($from);
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if ( ! in_array($from['mon'], $this->_period['months']))
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return $this->_next_crontab_month($from);
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if (count($this->_period['weekdays']) === 7)
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{
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// Day of Week is unrestricted, defer to Day of Month
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if ( ! in_array($from['mday'], $this->_period['monthdays']))
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return $this->_next_crontab_monthday($from);
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}
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elseif (count($this->_period['monthdays']) === 31)
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{
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// Day of Month is unrestricted, use Day of Week
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if ( ! in_array($from['wday'], $this->_period['weekdays']))
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return $this->_next_crontab_weekday($from);
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}
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else
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{
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// Both Day of Week and Day of Month are restricted
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if ( ! in_array($from['mday'], $this->_period['monthdays']) AND ! in_array($from['wday'], $this->_period['weekdays']))
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return $this->_next_crontab_day($from);
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}
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if ( ! in_array($from['hours'], $this->_period['hours']))
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return $this->_next_crontab_hour($from);
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return $this->_next_crontab_minute($from);
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}
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/**
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* Calculates the first timestamp in the next day of this period when both
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* Day of Week and Day of Month are restricted
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*
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* @uses _next_crontab_month()
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*
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* @param array Date array from getdate()
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* @return integer Timestamp of next restricted Day
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*/
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protected function _next_crontab_day(array $from)
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{
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// Calculate effective Day of Month for next Day of Week
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if ($from['wday'] >= end($this->_period['weekdays']))
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{
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$next = reset($this->_period['weekdays']) + 7;
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}
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else
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{
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foreach ($this->_period['weekdays'] as $next)
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{
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if ($from['wday'] < $next)
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break;
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}
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}
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$monthday = $from['mday'] + $next - $from['wday'];
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if ($monthday <= (int) date('t', mktime(0, 0, 0, $from['mon'], 1, $from['year'])))
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{
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// Next Day of Week is in this Month
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if ($from['mday'] >= end($this->_period['monthdays']))
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{
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// No next Day of Month, use next Day of Week
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$from['mday'] = $monthday;
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}
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else
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{
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// Calculate next Day of Month
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foreach ($this->_period['monthdays'] as $next)
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{
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if ($from['mday'] < $next)
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break;
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}
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// Use earliest day
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$from['mday'] = min($monthday, $next);
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}
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}
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else
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{
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if ($from['mday'] >= end($this->_period['monthdays']))
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{
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// No next Day of Month, use next Month
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return $this->_next_crontab_month($from);
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}
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// Calculate next Day of Month
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foreach ($this->_period['monthdays'] as $next)
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{
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if ($from['mday'] < $next)
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break;
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}
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// Use next Day of Month
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$from['mday'] = $next;
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}
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// Use first Hour and first Minute
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return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $from['mday'], $from['year']);
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}
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/**
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* Calculates the first timestamp in the next hour of this period
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*
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* @uses _next_crontab_day()
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* @uses _next_crontab_monthday()
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* @uses _next_crontab_weekday()
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*
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* @param array Date array from getdate()
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* @return integer Timestamp of next Hour
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*/
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protected function _next_crontab_hour(array $from)
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{
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if ($from['hours'] >= end($this->_period['hours']))
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{
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// No next Hour
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if (count($this->_period['weekdays']) === 7)
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{
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// Day of Week is unrestricted, defer to Day of Month
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return $this->_next_crontab_monthday($from);
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}
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if (count($this->_period['monthdays']) === 31)
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{
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// Day of Month is unrestricted, use Day of Week
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return $this->_next_crontab_weekday($from);
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||
|
|
}
|
||
|
|
|
||
|
|
// Both Day of Week and Day of Month are restricted
|
||
|
|
return $this->_next_crontab_day($from);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate next Hour
|
||
|
|
foreach ($this->_period['hours'] as $next)
|
||
|
|
{
|
||
|
|
if ($from['hours'] < $next)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use next Hour and first Minute
|
||
|
|
return mktime($next, reset($this->_period['minutes']), 0, $from['mon'], $from['mday'], $from['year']);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the timestamp of the next minute in this period
|
||
|
|
*
|
||
|
|
* @uses _next_crontab_hour()
|
||
|
|
*
|
||
|
|
* @param array Date array from getdate()
|
||
|
|
* @return integer Timestamp of next Minute
|
||
|
|
*/
|
||
|
|
protected function _next_crontab_minute(array $from)
|
||
|
|
{
|
||
|
|
if ($from['minutes'] >= end($this->_period['minutes']))
|
||
|
|
{
|
||
|
|
// No next Minute, use next Hour
|
||
|
|
return $this->_next_crontab_hour($from);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate next Minute
|
||
|
|
foreach ($this->_period['minutes'] as $next)
|
||
|
|
{
|
||
|
|
if ($from['minutes'] < $next)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use next Minute
|
||
|
|
return mktime($from['hours'], $next, 0, $from['mon'], $from['mday'], $from['year']);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the first timestamp in the next month of this period
|
||
|
|
*
|
||
|
|
* @param array Date array from getdate()
|
||
|
|
* @return integer Timestamp of next Month
|
||
|
|
*/
|
||
|
|
protected function _next_crontab_month(array $from)
|
||
|
|
{
|
||
|
|
if ($from['mon'] >= end($this->_period['months']))
|
||
|
|
{
|
||
|
|
// No next Month, increment Year and use first Month
|
||
|
|
++$from['year'];
|
||
|
|
$from['mon'] = reset($this->_period['months']);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Calculate next Month
|
||
|
|
foreach ($this->_period['months'] as $next)
|
||
|
|
{
|
||
|
|
if ($from['mon'] < $next)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use next Month
|
||
|
|
$from['mon'] = $next;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count($this->_period['weekdays']) === 7)
|
||
|
|
{
|
||
|
|
// Day of Week is unrestricted, use first Day of Month
|
||
|
|
$from['mday'] = reset($this->_period['monthdays']);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Calculate Day of Month for the first Day of Week
|
||
|
|
$indices = array_flip($this->_period['weekdays']);
|
||
|
|
|
||
|
|
$monthday = 1;
|
||
|
|
$weekday = (int) date('w', mktime(0, 0, 0, $from['mon'], 1, $from['year']));
|
||
|
|
|
||
|
|
while ( ! isset($indices[$weekday % 7]) AND $monthday < 7)
|
||
|
|
{
|
||
|
|
++$monthday;
|
||
|
|
++$weekday;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count($this->_period['monthdays']) === 31)
|
||
|
|
{
|
||
|
|
// Day of Month is unrestricted, use first Day of Week
|
||
|
|
$from['mday'] = $monthday;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Both Day of Month and Day of Week are restricted, use earliest one
|
||
|
|
$from['mday'] = min($monthday, reset($this->_period['monthdays']));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use first Hour and first Minute
|
||
|
|
return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $from['mday'], $from['year']);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the first timestamp in the next day of this period when only
|
||
|
|
* Day of Month is restricted
|
||
|
|
*
|
||
|
|
* @uses _next_crontab_month()
|
||
|
|
*
|
||
|
|
* @param array Date array from getdate()
|
||
|
|
* @return integer Timestamp of next Day of Month
|
||
|
|
*/
|
||
|
|
protected function _next_crontab_monthday(array $from)
|
||
|
|
{
|
||
|
|
if ($from['mday'] >= end($this->_period['monthdays']))
|
||
|
|
{
|
||
|
|
// No next Day of Month, use next Month
|
||
|
|
return $this->_next_crontab_month($from);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate next Day of Month
|
||
|
|
foreach ($this->_period['monthdays'] as $next)
|
||
|
|
{
|
||
|
|
if ($from['mday'] < $next)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use next Day of Month, first Hour, and first Minute
|
||
|
|
return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $next, $from['year']);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculates the first timestamp in the next day of this period when only
|
||
|
|
* Day of Week is restricted
|
||
|
|
*
|
||
|
|
* @uses _next_crontab_month()
|
||
|
|
*
|
||
|
|
* @param array Date array from getdate()
|
||
|
|
* @return integer Timestamp of next Day of Week
|
||
|
|
*/
|
||
|
|
protected function _next_crontab_weekday(array $from)
|
||
|
|
{
|
||
|
|
// Calculate effective Day of Month for next Day of Week
|
||
|
|
|
||
|
|
if ($from['wday'] >= end($this->_period['weekdays']))
|
||
|
|
{
|
||
|
|
$next = reset($this->_period['weekdays']) + 7;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
foreach ($this->_period['weekdays'] as $next)
|
||
|
|
{
|
||
|
|
if ($from['wday'] < $next)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$monthday = $from['mday'] + $next - $from['wday'];
|
||
|
|
|
||
|
|
if ($monthday > (int) date('t', mktime(0, 0, 0, $from['mon'], 1, $from['year'])))
|
||
|
|
{
|
||
|
|
// Next Day of Week is not in this Month, use next Month
|
||
|
|
return $this->_next_crontab_month($from);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use next Day of Week, first Hour, and first Minute
|
||
|
|
return mktime(reset($this->_period['hours']), reset($this->_period['minutes']), 0, $from['mon'], $monthday, $from['year']);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a sorted array of all the values indicated in a Crontab field
|
||
|
|
* @link http://linux.die.net/man/5/crontab
|
||
|
|
*
|
||
|
|
* @param string Crontab field
|
||
|
|
* @param integer Minimum value for this field
|
||
|
|
* @param integer Maximum value for this field
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
protected function _parse_crontab_field($value, $min, $max)
|
||
|
|
{
|
||
|
|
$result = array();
|
||
|
|
|
||
|
|
foreach (explode(',', $value) as $value)
|
||
|
|
{
|
||
|
|
if ($slash = strrpos($value, '/'))
|
||
|
|
{
|
||
|
|
$step = (int) substr($value, $slash + 1);
|
||
|
|
$value = substr($value, 0, $slash);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($value === '*')
|
||
|
|
{
|
||
|
|
$result = array_merge($result, range($min, $max, $slash ? $step : 1));
|
||
|
|
}
|
||
|
|
elseif ($dash = strpos($value, '-'))
|
||
|
|
{
|
||
|
|
$result = array_merge($result, range(max($min, (int) substr($value, 0, $dash)), min($max, (int) substr($value, $dash + 1)), $slash ? $step : 1));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$value = (int) $value;
|
||
|
|
|
||
|
|
if ($min <= $value AND $value <= $max)
|
||
|
|
{
|
||
|
|
$result[] = $value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sort($result);
|
||
|
|
|
||
|
|
return array_unique($result);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|