public function executeJobs($schedule = null)
{
if (!Mage::getStoreConfig('jobqueue/config/enabled')) {
return;
}
if ($schedule) {
$jobsRoot = Mage::getConfig()->getNode('crontab/jobs');
$jobConfig = $jobsRoot->{$schedule->getJobCode()};
$queue = $jobConfig->queue;
if ($queue) {
$this->setQueue($queue);
}
}
$this->setupDJJob();
try {
$collection = Mage::getModel('jobqueue/job')->getCollection();
$collection->addFieldToFilter('queue', array('eq' => $this->getQueue()))->addFieldToFilter('run_at', array(array('null' => true), array('lteq' => now())))->addFieldToFilter(array('locked_at', 'locked_by'), array(array('locked_at', 'null' => true), array('locked_by', 'eq' => $this->workerName)))->addFieldToFilter('failed_at', array('null' => true))->addFieldToFilter('attempts', array('lt' => (int) Mage::getStoreConfig('jobqueue/config/max_attempts')));
// randomly order to prevent lock contention among workers
$collection->getSelect()->order(new Zend_Db_Expr('RAND()'));
$collection->load();
foreach ($collection as $row) {
$job = new DJJob($this->workerName, $row->getId(), array("max_attempts" => Mage::getStoreConfig('jobqueue/config/max_attempts')));
if ($job->acquireLock()) {
$job->run();
}
}
} catch (Exception $e) {
Mage::logException($e);
}
}
/**
* Returns a new job ordered by most recent first
* why this?
* run newest first, some jobs get left behind
* run oldest first, all jobs get left behind
* @return DJJob
*/
public function getNewJob()
{
# we can grab a locked job if we own the lock
$rs = $this->runQuery("\n SELECT id\n FROM " . self::$jobsTable . "\n WHERE queue = ?\n AND (run_at IS NULL OR NOW() >= run_at)\n AND (locked_at IS NULL OR locked_by = ?)\n AND failed_at IS NULL\n AND attempts < ?\n ORDER BY created_at DESC\n LIMIT 10\n ", array($this->queue, $this->name, $this->max_attempts));
// randomly order the 10 to prevent lock contention among workers
shuffle($rs);
foreach ($rs as $r) {
$job = new DJJob($this->name, $r["id"], array("max_attempts" => $this->max_attempts, "fail_on_output" => $this->fail_on_output));
if ($job->acquireLock()) {
return $job;
}
}
return false;
}