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<?php
/**
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
* @author Robin McCorkell <rmccorkell@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\BackgroundJob;
use OCP\BackgroundJob\IJobList;
use OCP\AutoloadNotAllowedException;
class JobList implements IJobList {
/**
* @var \OCP\IDBConnection
*/
private $conn;
/**
* @var \OCP\IConfig $config
*/
private $config;
/**
* @param \OCP\IDBConnection $conn
* @param \OCP\IConfig $config
*/
public function __construct($conn, $config) {
$this->conn = $conn;
$this->config = $config;
}
/**
* @param Job|string $job
* @param mixed $argument
*/
public function add($job, $argument = null) {
if (!$this->has($job, $argument)) {
if ($job instanceof Job) {
$class = get_class($job);
} else {
$class = $job;
}
$argument = json_encode($argument);
if (strlen($argument) > 4000) {
throw new \InvalidArgumentException('Background job arguments can\'t exceed 4000 characters (json encoded)');
}
$query = $this->conn->prepare('INSERT INTO `*PREFIX*jobs`(`class`, `argument`, `last_run`) VALUES(?, ?, 0)');
$query->execute(array($class, $argument));
}
}
/**
* @param Job|string $job
* @param mixed $argument
*/
public function remove($job, $argument = null) {
if ($job instanceof Job) {
$class = get_class($job);
} else {
$class = $job;
}
if (!is_null($argument)) {
$argument = json_encode($argument);
$query = $this->conn->prepare('DELETE FROM `*PREFIX*jobs` WHERE `class` = ? AND `argument` = ?');
$query->execute(array($class, $argument));
} else {
$query = $this->conn->prepare('DELETE FROM `*PREFIX*jobs` WHERE `class` = ?');
$query->execute(array($class));
}
}
protected function removeById($id) {
$query = $this->conn->prepare('DELETE FROM `*PREFIX*jobs` WHERE `id` = ?');
$query->execute([$id]);
}
/**
* check if a job is in the list
*
* @param Job|string $job
* @param mixed $argument
* @return bool
*/
public function has($job, $argument) {
if ($job instanceof Job) {
$class = get_class($job);
} else {
$class = $job;
}
$argument = json_encode($argument);
$query = $this->conn->prepare('SELECT `id` FROM `*PREFIX*jobs` WHERE `class` = ? AND `argument` = ?');
$query->execute(array($class, $argument));
return (bool)$query->fetch();
}
/**
* get all jobs in the list
*
* @return Job[]
*/
public function getAll() {
$query = $this->conn->prepare('SELECT `id`, `class`, `last_run`, `argument` FROM `*PREFIX*jobs`');
$query->execute();
$jobs = array();
while ($row = $query->fetch()) {
$job = $this->buildJob($row);
if ($job) {
$jobs[] = $job;
}
}
return $jobs;
}
/**
* get the next job in the list
*
* @return Job
*/
public function getNext() {
$lastId = $this->getLastJob();
$query = $this->conn->prepare('SELECT `id`, `class`, `last_run`, `argument` FROM `*PREFIX*jobs` WHERE `id` > ? ORDER BY `id` ASC', 1);
$query->execute(array($lastId));
if ($row = $query->fetch()) {
$jobId = $row['id'];
$job = $this->buildJob($row);
} else {
//begin at the start of the queue
$query = $this->conn->prepare('SELECT `id`, `class`, `last_run`, `argument` FROM `*PREFIX*jobs` ORDER BY `id` ASC', 1);
$query->execute();
if ($row = $query->fetch()) {
$jobId = $row['id'];
$job = $this->buildJob($row);
} else {
return null; //empty job list
}
}
if (is_null($job)) {
$this->removeById($jobId);
return $this->getNext();
} else {
return $job;
}
}
/**
* @param int $id
* @return Job|null
*/
public function getById($id) {
$query = $this->conn->prepare('SELECT `id`, `class`, `last_run`, `argument` FROM `*PREFIX*jobs` WHERE `id` = ?');
$query->execute(array($id));
if ($row = $query->fetch()) {
return $this->buildJob($row);
} else {
return null;
}
}
/**
* get the job object from a row in the db
*
* @param array $row
* @return Job
*/
private function buildJob($row) {
$class = $row['class'];
/**
* @var Job $job
*/
try {
if (!class_exists($class)) {
// job from disabled app or old version of an app, no need to do anything
return null;
}
$job = new $class();
$job->setId($row['id']);
$job->setLastRun($row['last_run']);
$job->setArgument(json_decode($row['argument'], true));
return $job;
} catch (AutoloadNotAllowedException $e) {
// job is from a disabled app, ignore
}
return null;
}
/**
* set the job that was last ran
*
* @param Job $job
*/
public function setLastJob($job) {
$this->config->setAppValue('backgroundjob', 'lastjob', $job->getId());
}
/**
* get the id of the last ran job
*
* @return string
*/
public function getLastJob() {
return $this->config->getAppValue('backgroundjob', 'lastjob', 0);
}
/**
* set the lastRun of $job to now
*
* @param Job $job
*/
public function setLastRun($job) {
$query = $this->conn->prepare('UPDATE `*PREFIX*jobs` SET `last_run` = ? WHERE `id` = ?');
$query->execute(array(time(), $job->getId()));
}
}
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