/**
* Run the jobs that are in the queue
*
* @param mixed $limit Limit of jobs to run
* @return int Number of jobs run
*/
public function run($limit = NULL)
{
// Cleanup crashed jobs
$pids = $this->_db->fetchCol("SELECT pid FROM {$this->_table} WHERE pid IS NOT NULL GROUP BY pid");
foreach ($pids as $pid) {
// Old pid is no longer running, release it's reserved tasks
if (is_numeric($pid) && !file_exists("/proc/{$pid}/status")) {
Mage::log("A crashed job queue process was detected for pid {$pid}", Zend_Log::NOTICE, self::ERROR_LOG);
$this->_db->update($this->_table, array('pid' => new Zend_Db_Expr('NULL')), array('pid = ?' => $pid));
}
}
// Reserve all new jobs since last run
$pid = getmypid();
$limit = $limit ? "LIMIT {$limit}" : '';
$batchSize = $this->_db->query("UPDATE {$this->_db->quoteIdentifier($this->_table, true)} SET pid = {$pid} WHERE pid IS NULL ORDER BY job_id {$limit}")->rowCount();
// Run all reserved jobs
$result = $this->_db->query($this->_db->select()->from($this->_table, '*')->where('pid = ?', $pid)->order(array('job_id')));
while ($row = $result->fetch()) {
$where = $this->_db->quoteInto('job_id = ?', $row['job_id']);
$data = substr($row['data'], 0, 1) == '{' ? json_decode($row['data'], TRUE) : ($data = unserialize($row['data']));
// Check retries
if ($row['retries'] >= $row['max_retries']) {
$this->_db->delete($this->_table, $where);
Mage::log("{$row['pid']}: Mage::getSingleton({$row['class']})->{$row['method']}(" . json_encode($data) . ")\n" . $row['error_log'], Zend_Log::ERR, self::ERROR_LOG);
continue;
}
// Run job!
try {
$model = Mage::getSingleton($row['class']);
$method = $row['method'];
$model->{$method}(new Varien_Object($data));
$this->_db->delete($this->_table, $where);
Mage::log("{$row['pid']}: Mage::getSingleton({$row['class']})->{$row['method']}(" . json_encode($data) . ")", Zend_Log::INFO, self::SUCCESS_LOG);
} catch (Exception $e) {
// Increment retries and log error information
$error = date('c') . " ERROR: " . get_class($e) . ": '{$e->getMessage()}' in {$e->getFile()}:{$e->getLine()}\n" . "Stack trace:\n" . $e->getTraceAsString();
$bind = array('pid' => new Zend_Db_Expr('NULL'), 'retries' => new Zend_Db_Expr('retries + 1'), 'error_log' => new Zend_Db_Expr('SUBSTR(CONCAT(error_log,' . $this->_db->quote($error) . ',"\\n\\n"),1,20000)'));
$this->_db->update($this->_table, $bind, $where);
}
}
return $batchSize;
}
public function getNewValue($type, $oldValue)
{
$dbSelect = $this->mySqlReadConnection->select()->from($this->tableName, 'newValue')->where('`type` = ?', (string) $type)->where('`oldValue` = ?', (string) $oldValue);
$result = $this->mySqlReadConnection->fetchCol($dbSelect);
return $result ? $result[0] : false;
}