/**
* @see QueueInterface::pop()
*/
public function pop()
{
$command = array('findandmodify' => $this->collection->getName(), 'remove' => 1, 'fields' => array('task' => 1), 'query' => array('eta' => array('$lte' => new \MongoDate())), 'sort' => array('eta' => 1));
$result = $this->collection->db->command($command);
if (!$result['ok']) {
throw new \RuntimeException($result['errmsg']);
}
$data = $result['value'];
return $data ? $this->serializer->unserialize($data['task']) : false;
}
/**
* @see QueueInterface::pop()
*/
public function pop()
{
$sql = 'SELECT task FROM ' . $this->tableName . ' WHERE eta <= :now ORDER BY eta, id LIMIT 1';
$stmt = $this->prepareStatement($sql);
$stmt->bindValue(':now', date(static::DATETIME_FORMAT));
if (!$stmt->execute()) {
$err = $stmt->errorInfo();
throw new \RuntimeException($err[2]);
}
$data = $stmt->fetchColumn();
return $data ? $this->serializer->unserialize($data) : false;
}
/**
* @see QueueInterface::pop()
*/
public function pop()
{
while (true) {
if ($this->tryLock()) {
$range = $this->redis->zRangeByScore('tasks', '-inf', time(), array('limit' => array(0, 1)));
if (empty($range)) {
$this->releaseLock();
return false;
}
$key = reset($range);
$this->redis->zRem('tasks', $key);
$this->releaseLock();
$data = substr($key, strpos($key, '@') + 1);
return $this->serializer->unserialize($data);
}
// the lock failed to be released by the client
$this->releaseLock();
}
}
