public function read($id)
{
if (isset($this->sessions[$id])) {
return (string) $this->sessions[$id];
}
$cache_key = $this->cacheKey($id);
if (false !== ($sess = Pfw_Cache_Dist::get($cache_key))) {
$this->sessions[$id] = $sess;
return (string) $sess;
}
$where = $this->db->_sprintfEsc(array('session_id = %s', $id), true);
$data = $this->db->fetchOne("SELECT `session_data` FROM `{$this->db_table}` WHERE {$where}");
$session_data = (string) $data['session_data'];
$this->sessions[$id] = $session_data;
Pfw_Cache_Dist::set($cache_key, $session_data, self::CACHE_TTL);
return $session_data;
}
protected function _toStringWhere()
{
$where_conds = array();
if (!empty($this->where)) {
foreach ($this->where as $alias => $where) {
if (is_array($where)) {
$where = $this->adapter->_sprintfEsc($where);
}
array_push($where_conds, "({$where})");
}
return "WHERE " . implode($where_conds, " AND ");
}
return "";
}