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<?php
/**
* Job queue task description base code.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup JobQueue
*/
/**
* Job queue task description interface
*
* @ingroup JobQueue
* @since 1.23
*/
interface IJobSpecification {
/**
* @return string Job type
*/
public function getType();
/**
* @return array
*/
public function getParams();
/**
* @return int|null UNIX timestamp to delay running this job until, otherwise null
*/
public function getReleaseTimestamp();
/**
* @return bool Whether only one of each identical set of jobs should be run
*/
public function ignoreDuplicates();
/**
* Subclasses may need to override this to make duplication detection work.
* The resulting map conveys everything that makes the job unique. This is
* only checked if ignoreDuplicates() returns true, meaning that duplicate
* jobs are supposed to be ignored.
*
* @return array Map of key/values
*/
public function getDeduplicationInfo();
/**
* @return Title Descriptive title (this can simply be informative)
*/
public function getTitle();
}
/**
* Job queue task description base code
*
* Example usage:
* <code>
* $job = new JobSpecification(
* 'null',
* array( 'lives' => 1, 'usleep' => 100, 'pi' => 3.141569 ),
* array( 'removeDuplicates' => 1 ),
* Title::makeTitle( NS_SPECIAL, 'nullity' )
* );
* JobQueueGroup::singleton()->push( $job )
* </code>
*
* @ingroup JobQueue
* @since 1.23
*/
class JobSpecification implements IJobSpecification {
/** @var string */
protected $type;
/** @var array Array of job parameters or false if none */
protected $params;
/** @var Title */
protected $title;
/** @var bool Expensive jobs may set this to true */
protected $ignoreDuplicates;
/**
* @param string $type
* @param array $params Map of key/values
* @param array $opts Map of key/values
* @param Title $title Optional descriptive title
*/
public function __construct(
$type, array $params, array $opts = array(), Title $title = null
) {
$this->validateParams( $params );
$this->type = $type;
$this->params = $params;
$this->title = $title ?: Title::newMainPage();
$this->ignoreDuplicates = !empty( $opts['removeDuplicates'] );
}
/**
* @param array $params
*/
protected function validateParams( array $params ) {
foreach ( $params as $p => $v ) {
if ( is_array( $v ) ) {
$this->validateParams( $v );
} elseif ( !is_scalar( $v ) && $v !== null ) {
throw new UnexpectedValueException( "Job parameter $p is not JSON serializable." );
}
}
}
/**
* @return string
*/
public function getType() {
return $this->type;
}
/**
* @return Title
*/
public function getTitle() {
return $this->title;
}
/**
* @return array
*/
public function getParams() {
return $this->params;
}
/**
* @return int|null UNIX timestamp to delay running this job until, otherwise null
*/
public function getReleaseTimestamp() {
return isset( $this->params['jobReleaseTimestamp'] )
? wfTimestampOrNull( TS_UNIX, $this->params['jobReleaseTimestamp'] )
: null;
}
/**
* @return bool Whether only one of each identical set of jobs should be run
*/
public function ignoreDuplicates() {
return $this->ignoreDuplicates;
}
/**
* Subclasses may need to override this to make duplication detection work.
* The resulting map conveys everything that makes the job unique. This is
* only checked if ignoreDuplicates() returns true, meaning that duplicate
* jobs are supposed to be ignored.
*
* @return array Map of key/values
*/
public function getDeduplicationInfo() {
$info = array(
'type' => $this->getType(),
'namespace' => $this->getTitle()->getNamespace(),
'title' => $this->getTitle()->getDBkey(),
'params' => $this->getParams()
);
if ( is_array( $info['params'] ) ) {
// Identical jobs with different "root" jobs should count as duplicates
unset( $info['params']['rootJobSignature'] );
unset( $info['params']['rootJobTimestamp'] );
// Likewise for jobs with different delay times
unset( $info['params']['jobReleaseTimestamp'] );
}
return $info;
}
}
|
