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Cron improvement, props hailin, fixes #7068 

git-svn-id: http://svn.automattic.com/wordpress/trunk@8927 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
azaozz 2008-09-18 07:09:38 +00:00
parent 40ecb1eec2
commit 0853ba158c
2 changed files with 67 additions and 20 deletions
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40
wp-cron.php
View File

@ -23,31 +23,41 @@ require_once('./wp-load.php');
if ( $_GET['check'] != wp_hash('187425') )
exit;
if ( get_option('doing_cron') > time() )
exit;
update_option('doing_cron', time() + 30);
$local_time = time();
$crons = _get_cron_array();
$keys = array_keys($crons);
if (!is_array($crons) || $keys[0] > time())
return;
$keys = array_keys( $crons );
if (!is_array($crons) || $keys[0] > $local_time) {
update_option('doing_cron', 0);
return;
}
foreach ($crons as $timestamp => $cronhooks) {
if ( $timestamp > $local_time )
break;
foreach ($crons as $timestamp => $cronhooks) {
if ($timestamp > time()) break;
foreach ($cronhooks as $hook => $keys) {
foreach ($keys as $key => $args) {
$schedule = $args['schedule'];
foreach ($keys as $k => $v) {
$schedule = $v['schedule'];
if ($schedule != false) {
$new_args = array($timestamp, $schedule, $hook, $args['args']);
$new_args = array($timestamp, $schedule, $hook, $v['args']);
call_user_func_array('wp_reschedule_event', $new_args);
}
wp_unschedule_event($timestamp, $hook, $args['args']);
do_action_ref_array($hook, $args['args']);
wp_unschedule_event($timestamp, $hook, $v['args']);
do_action_ref_array($hook, $v['args']);
}
}
}
update_option('doing_cron', 0);
?>
die();
?>

47
wp-includes/cron.php
View File

@ -152,17 +152,47 @@ function wp_next_scheduled( $hook, $args = array() ) {
*
* @return null Cron could not be spawned, because it is not needed to run.
*/
function spawn_cron() {
$crons = _get_cron_array();
function spawn_cron( $local_time ) {
global $current_blog;
/*
* do not even start the cron if local server timer has drifted
* such as due to power failure, or misconfiguration
*/
$timer_accurate = check_server_timer( $local_time );
if ( !$timer_accurate )
return;
//sanity check
$crons = _get_cron_array();
if ( !is_array($crons) )
return;
$keys = array_keys( $crons );
if ( array_shift( $keys ) > time() )
$timestamp = $keys[0];
if ( $timestamp > $local_time )
return;
$cron_url = get_option( 'siteurl' ) . '/wp-cron.php?check=' . wp_hash('187425');
/*
* multiple processes on multiple web servers can run this code concurrently
* try to make this as atomic as possible by setting doing_cron switch
*/
$flag = get_option('doing_cron');
// clean up potential invalid value resulted from various system chaos
if ( $flag != 0 ) {
if ( $flag > $local_time + 10*60 || $flag < $local_time - 10*60 ) {
update_option('doing_cron', 0);
$flag = 0;
}
}
//don't run if another process is currently running it
if ( $flag > $local_time )
return;
update_option( 'doing_cron', $local_time + 30 );
wp_remote_post($cron_url, array('timeout' => 0.01, 'blocking' => false));
}
@ -175,6 +205,7 @@ function spawn_cron() {
* @return null When doesn't need to run Cron.
*/
function wp_cron() {
// Prevent infinite loops caused by lack of wp-cron.php
if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false )
return;
@ -188,13 +219,14 @@ function wp_cron() {
if ( isset($keys[0]) && $keys[0] > time() )
return;
$local_time = time();
$schedules = wp_get_schedules();
foreach ( $crons as $timestamp => $cronhooks ) {
if ( $timestamp > time() ) break;
if ( $timestamp > $local_time ) break;
foreach ( (array) $cronhooks as $hook => $args ) {
if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
continue;
spawn_cron();
spawn_cron( $local_time );
break 2;
}
}
@ -327,4 +359,9 @@ function _upgrade_cron_array($cron) {
return $new_cron;
}
// stub for checking server timer accuracy, using outside standard time sources
function check_server_timer( $local_time ) {
return true;
}
?>