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Cache PDO connections and connection failures in a single page load

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This commit is contained in:
kaetemi 2014-09-09 02:15:25 +02:00
parent c4d4587830
commit be78a1cd0b
1 changed files with 24 additions and 14 deletions
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38
code/web/private_php/ams/autoload/dblayer.php
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@ -29,13 +29,13 @@
*
*/
// $PDOCache = array();
$PDOCache = array();
class DBLayer {
private $PDO;
// private $host;
// private $dbname;
private $host;
private $dbname;
/**
* The PDO object, instantiated by the constructor
@ -54,12 +54,15 @@ class DBLayer {
}
global $cfg;
// $this->host = $cfg['db'][$db]['host'];
// $this->dbname = $cfg['db'][$db]['name'];
/*global $PDOCache;
$this->host = $cfg['db'][$db]['host'];
$this->dbname = $cfg['db'][$db]['name'];
global $PDOCache;
if (isset($PDOCache[$this->host])) {
if (isset($PDOCache[$this->host]['exception'])) {
throw $PDOCache[$this->host]['exception'];
}
$this->PDO = $PDOCache[$this->host]['pdo'];
} else {*/
} else {
$dsn = "mysql:";
$dsn .= "host=" . $cfg['db'][$db]['host'] . ";";
$dsn .= "dbname=" . $cfg['db'][$db]['name'] . ";"; // Comment this out when using the cache
@ -68,14 +71,21 @@ class DBLayer {
$opt = array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
PDO::ATTR_PERSISTENT => true
PDO::ATTR_PERSISTENT => true,
PDO::ATTR_TIMEOUT => 5
);
$this->PDO = new PDO($dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt);
/* $PDOCache[$this->host] = array();
$PDOCache[$this->host] = array();
try {
$this->PDO = new PDO($dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt);
} catch (Exception $e) {
$PDOCache[$this->host]['exception'] = $e;
throw $e;
return;
}
$PDOCache[$this->host]['pdo'] = $this->PDO;
$PDOCache[$this->host]['use'] = $this->dbname;
*/ //$this->PDO->query('USE ' . $this->dbname . ';'); // FIXME safety
/*}*/
$this->PDO->query('USE ' . $this->dbname . ';'); // FIXME safety
}
}
function __destruct() {
@ -83,11 +93,11 @@ class DBLayer {
}
function useDb() {
/*global $PDOCache;
global $PDOCache;
if ($PDOCache[$this->host]['use'] != $this->dbname) {
$PDOCache[$this->host]['use'] = $this->dbname;
$this->PDO->query('USE ' . $this->dbname . ';'); // FIXME safety
}*/
}
}
/**