die( "This file is part of MediaWiki, it is not a valid entry point\n" );
}
+require_once('UserMailer.php');
+
+/**
+ * Class to both describe a background job and handle jobs.
+ */
abstract class Job {
var $command,
$title,
$removeDuplicates,
$error;
+ /*-------------------------------------------------------------------------
+ * Abstract functions
+ *------------------------------------------------------------------------*/
+
+ /**
+ * Run the job
+ * @return boolean success
+ */
+ abstract function run();
+
/*-------------------------------------------------------------------------
* Static functions
*------------------------------------------------------------------------*/
- /**
+ /**
* @deprecated use LinksUpdate::queueRecursiveJobs()
*/
/**
* static function queueLinksJobs( $titles ) {}
*/
+ /**
+ * Pop a job of a certain type. This tries less hard than pop() to
+ * actually find a job; it may be adversely affected by concurrent job
+ * runners.
+ */
+ static function pop_type($type) {
+ wfProfilein( __METHOD__ );
+
+ $dbw = wfGetDB( DB_MASTER );
+
+
+ $row = $dbw->selectRow( 'job', '*', array( 'job_cmd' => $type ), __METHOD__,
+ array( 'LIMIT' => 1 ));
+
+ if ($row === false) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
+
+ /* Ensure we "own" this row */
+ $dbw->delete( 'job', array( 'job_id' => $row->job_id ), __METHOD__ );
+ $affected = $dbw->affectedRows();
+
+ if ($affected == 0) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
+
+ $namespace = $row->job_namespace;
+ $dbkey = $row->job_title;
+ $title = Title::makeTitleSafe( $namespace, $dbkey );
+ $job = Job::factory( $row->job_cmd, $title, Job::extractBlob( $row->job_params ), $row->job_id );
+
+ $dbw->delete( 'job', $job->insertFields(), __METHOD__ );
+ $dbw->immediateCommit();
+
+ wfProfileOut( __METHOD__ );
+ return $job;
+ }
+
/**
* Pop a job off the front of the queue
* @static
+ * @param $offset Number of jobs to skip
* @return Job or false if there's no jobs
*/
- static function pop() {
+ static function pop($offset=0) {
wfProfileIn( __METHOD__ );
$dbr = wfGetDB( DB_SLAVE );
- // Get a job from the slave
- $row = $dbr->selectRow( 'job', '*', '', __METHOD__,
- array( 'ORDER BY' => 'job_id', 'LIMIT' => 1 )
- );
+ /* Get a job from the slave, start with an offset,
+ scan full set afterwards, avoid hitting purged rows
- if ( $row === false ) {
- wfProfileOut( __METHOD__ );
- return false;
+ NB: If random fetch previously was used, offset
+ will always be ahead of few entries
+ */
+
+ $row = $dbr->selectRow( 'job', '*', "job_id >= ${offset}", __METHOD__,
+ array( 'ORDER BY' => 'job_id', 'LIMIT' => 1 ));
+
+ // Refetching without offset is needed as some of job IDs could have had delayed commits
+ // and have lower IDs than jobs already executed, blame concurrency :)
+ //
+ if ( $row === false) {
+ if ($offset!=0)
+ $row = $dbr->selectRow( 'job', '*', '', __METHOD__,
+ array( 'ORDER BY' => 'job_id', 'LIMIT' => 1 ));
+
+ if ($row === false ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
}
+ $offset = $row->job_id;
// Try to delete it from the master
$dbw = wfGetDB( DB_MASTER );
// Failed, someone else beat us to it
// Try getting a random row
$row = $dbw->selectRow( 'job', array( 'MIN(job_id) as minjob',
- 'MAX(job_id) as maxjob' ), '', __METHOD__ );
+ 'MAX(job_id) as maxjob' ), "job_id >= $offset", __METHOD__ );
if ( $row === false || is_null( $row->minjob ) || is_null( $row->maxjob ) ) {
// No jobs to get
wfProfileOut( __METHOD__ );
}
// Get the random row
$row = $dbw->selectRow( 'job', '*',
- array( 'job_id' => mt_rand( $row->minjob, $row->maxjob ) ), __METHOD__ );
+ 'job_id >= ' . mt_rand( $row->minjob, $row->maxjob ), __METHOD__ );
if ( $row === false ) {
// Random job gone before we got the chance to select it
// Give up
$dbw->delete( 'job', array( 'job_id' => $row->job_id ), __METHOD__ );
$affected = $dbw->affectedRows();
$dbw->immediateCommit();
-
+
if ( !$affected ) {
// Random job gone before we exclusively deleted it
// Give up
return false;
}
}
-
+
// If execution got to here, there's a row in $row that has been deleted from the database
// by this thread. Hence the concurrent pop was successful.
$namespace = $row->job_namespace;
$dbkey = $row->job_title;
$title = Title::makeTitleSafe( $namespace, $dbkey );
$job = Job::factory( $row->job_cmd, $title, Job::extractBlob( $row->job_params ), $row->job_id );
-
+
// Remove any duplicates it may have later in the queue
$dbw->delete( 'job', $job->insertFields(), __METHOD__ );
-
+
wfProfileOut( __METHOD__ );
return $job;
}
- /**
+ /**
* Create an object of a subclass
*/
static function factory( $command, $title, $params = false, $id = 0 ) {
case 'htmlCacheUpdate':
case 'html_cache_update': # BC
return new HTMLCacheUpdateJob( $title, $params['table'], $params['start'], $params['end'], $id );
+ case 'sendMail':
+ return new EmaillingJob($params);
+ case 'enotifNotify':
+ return new EnotifNotifyJob($title, $params);
default:
throw new MWException( "Invalid job command \"$command\"" );
}
}
}
+ /**
+ * Batch-insert a group of jobs into the queue.
+ * This will be wrapped in a transaction with a forced commit.
+ *
+ * This may add duplicate at insert time, but they will be
+ * removed later on, when the first one is popped.
+ *
+ * @param $jobs array of Job objects
+ */
+ static function batchInsert( $jobs ) {
+ if( count( $jobs ) ) {
+ $dbw = wfGetDB( DB_MASTER );
+ $dbw->begin();
+ foreach( $jobs as $job ) {
+ $rows[] = $job->insertFields();
+ }
+ $dbw->insert( 'job', $rows, __METHOD__, 'IGNORE' );
+ $dbw->commit();
+ }
+ }
+
/*-------------------------------------------------------------------------
* Non-static functions
*------------------------------------------------------------------------*/
$fields = $this->insertFields();
$dbw = wfGetDB( DB_MASTER );
-
+
if ( $this->removeDuplicates ) {
$res = $dbw->select( 'job', array( '1' ), $fields, __METHOD__ );
if ( $dbw->numRows( $res ) ) {
$fields['job_id'] = $dbw->nextSequenceValue( 'job_job_id_seq' );
$dbw->insert( 'job', $fields, __METHOD__ );
}
-
+
protected function insertFields() {
return array(
'job_cmd' => $this->command,
'job_params' => Job::makeBlob( $this->params )
);
}
-
- /**
- * Batch-insert a group of jobs into the queue.
- * This will be wrapped in a transaction with a forced commit.
- *
- * This may add duplicate at insert time, but they will be
- * removed later on, when the first one is popped.
- *
- * @param $jobs array of Job objects
- */
- static function batchInsert( $jobs ) {
- if( count( $jobs ) ) {
- $dbw = wfGetDB( DB_MASTER );
- $dbw->begin();
- foreach( $jobs as $job ) {
- $rows[] = $job->insertFields();
- }
- $dbw->insert( 'job', $rows, __METHOD__, 'IGNORE' );
- $dbw->commit();
- }
- }
- /**
- * Run the job
- * @return boolean success
- */
- abstract function run();
-
function toString() {
$paramString = '';
if ( $this->params ) {
}
}
+
+/**
+ * Background job to update links for a given title.
+ */
class RefreshLinksJob extends Job {
function __construct( $title, $params = '', $id = 0 ) {
parent::__construct( 'refreshLinks', $title, $params, $id );
$linkCache =& LinkCache::singleton();
$linkCache->clear();
-
+
if ( is_null( $this->title ) ) {
$this->error = "refreshLinks: Invalid title";
wfProfileOut( __METHOD__ );
}
}
+class EmaillingJob extends Job {
+ function __construct($params) {
+ parent::__construct('sendMail', Title::newMainPage(), $params);
+ }
+
+ function run() {
+ userMailer($this->params['to'], $this->params['from'], $this->params['subj'],
+ $this->params['body'], $this->params['replyto']);
+ }
+}
+
+class EnotifNotifyJob extends Job {
+ function __construct($title, $params) {
+ parent::__construct('enotifNotify', $title, $params);
+ }
+
+ function run() {
+ $enotif = new EmailNotification();
+ $enotif->actuallyNotifyOnPageChange( User::newFromName($this->params['editor'], false),
+ $this->title, $this->params['timestamp'],
+ $this->params['summary'], $this->params['minorEdit'],
+ $this->params['oldid']);
+ }
+}
+
+
?>
dépôts / lhc / web / wiklou.git / blobdiff