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<?php
/** Loading and saving data, it's only cache so load() does not need to block until save()
*/
interface NotORM_Cache {
/** Load stored data
* @param string
* @return mixed or null if not found
*/
function load($key);
/** Save data
* @param string
* @param mixed
* @return null
*/
function save($key, $data);
}
/** Cache using $_SESSION["NotORM"]
*/
class NotORM_Cache_Session implements NotORM_Cache {
function load($key) {
if (!isset($_SESSION["NotORM"][$key])) {
return null;
}
return $_SESSION["NotORM"][$key];
}
function save($key, $data) {
$_SESSION["NotORM"][$key] = $data;
}
}
/** Cache using file
*/
class NotORM_Cache_File implements NotORM_Cache {
private $filename, $data = array();
function __construct($filename) {
$this->filename = $filename;
$this->data = unserialize(@file_get_contents($filename)); // @ - file may not exist
}
function load($key) {
if (!isset($this->data[$key])) {
return null;
}
return $this->data[$key];
}
function save($key, $data) {
if (!isset($this->data[$key]) || $this->data[$key] !== $data) {
$this->data[$key] = $data;
file_put_contents($this->filename, serialize($this->data), LOCK_EX);
}
}
}
/** Cache using PHP include
*/
class NotORM_Cache_Include implements NotORM_Cache {
private $filename, $data = array();
function __construct($filename) {
$this->filename = $filename;
$this->data = @include realpath($filename); // @ - file may not exist, realpath() to not include from include_path //! silently falls with syntax error and fails with unreadable file
if (!is_array($this->data)) { // empty file returns 1
$this->data = array();
}
}
function load($key) {
if (!isset($this->data[$key])) {
return null;
}
return $this->data[$key];
}
function save($key, $data) {
if (!isset($this->data[$key]) || $this->data[$key] !== $data) {
$this->data[$key] = $data;
file_put_contents($this->filename, '<?php return ' . var_export($this->data, true) . ';', LOCK_EX);
}
}
}
/** Cache storing data to the "notorm" table in database
*/
class NotORM_Cache_Database implements NotORM_Cache {
private $connection;
function __construct(PDO $connection) {
$this->connection = $connection;
}
function load($key) {
$result = $this->connection->prepare("SELECT data FROM notorm WHERE id = ?");
$result->execute(array($key));
$return = $result->fetchColumn();
if (!$return) {
return null;
}
return unserialize($return);
}
function save($key, $data) {
// REPLACE is not supported by PostgreSQL and MS SQL
$parameters = array(serialize($data), $key);
$result = $this->connection->prepare("UPDATE notorm SET data = ? WHERE id = ?");
$result->execute($parameters);
if (!$result->rowCount()) {
$result = $this->connection->prepare("INSERT INTO notorm (data, id) VALUES (?, ?)");
try {
@$result->execute($parameters); // @ - ignore duplicate key error
} catch (PDOException $e) {
if ($e->getCode() != "23000") { // "23000" - duplicate key
throw $e;
}
}
}
}
}
// eAccelerator - user cache is obsoleted
/** Cache using "NotORM." prefix in Memcache
*/
class NotORM_Cache_Memcache implements NotORM_Cache {
private $memcache;
function __construct(Memcache $memcache) {
$this->memcache = $memcache;
}
function load($key) {
$return = $this->memcache->get("NotORM.$key");
if ($return === false) {
return null;
}
return $return;
}
function save($key, $data) {
$this->memcache->set("NotORM.$key", $data);
}
}
/** Cache using "NotORM." prefix in APC
*/
class NotORM_Cache_APC implements NotORM_Cache {
function load($key) {
$return = apc_fetch("NotORM.$key", $success);
if (!$success) {
return null;
}
return $return;
}
function save($key, $data) {
apc_store("NotORM.$key", $data);
}
}