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dbLayer : don't connect multiple times to the same database/username

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git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@1949 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
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Dominique Fournier
2015-01-27 14:37:25 +00:00
parent 64b00b1480
commit 4f23451432
1 changed files with 27 additions and 0 deletions
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27
dblayer.php
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@@ -85,6 +85,9 @@ class dblayer extends PDO
Attention : SQLite don't supports adding Foreign keys without deleting all Attention : SQLite don't supports adding Foreign keys without deleting all
the table, and re-import the datas (http://www.sqlite.org/omitted.html) */ the table, and re-import the datas (http://www.sqlite.org/omitted.html) */
/** Limit to one instance of the connection to the same database */
private static $instance = null;
/** Connection to the database engine /** Connection to the database engine
See http://fr2.php.net/manual/en/pdo.construct.php for the $dsn format See http://fr2.php.net/manual/en/pdo.construct.php for the $dsn format
@param string $dsn PDO Data Source Name @param string $dsn PDO Data Source Name
@@ -98,6 +101,16 @@ class dblayer extends PDO
if (! isset ($driver[0])) if (! isset ($driver[0]))
throw new Exception (_("No valid DSN provided"), 500); throw new Exception (_("No valid DSN provided"), 500);
// Force specifics initialisations // Force specifics initialisations
$oldInst = self::getInstance($dsn, $username);
if ($oldInst !== null)
{
$this->db = $oldInst["db"];
$this->sep = $oldInst["sep"];
$this->dsn = $oldInst["dsn"];
return;
}
switch ($driver[0]) switch ($driver[0])
{ {
case "sqlite": case "sqlite":
@@ -161,6 +174,20 @@ class dblayer extends PDO
break; break;
} }
$this->dsn = $dsn; $this->dsn = $dsn;
self::$instance["$dsn-$username"]["db"] = $this->db;
self::$instance["$dsn-$username"]["dsn"] = $this->dsn;
self::$instance["$dsn-$username"]["sep"] = $this->sep;
}
/** Singleton function to open one connection to each database/user wanted */
private function getInstance ($dsn, $username)
{
if (self::$instance === null ||
array_key_exists ("$dsn-$username", self::$instance) === false)
{
return null;
}
return self::$instance["$dsn-$username"];
} }
/** Return the connected database name from DSN used to connect */ /** Return the connected database name from DSN used to connect */