Add master-slave plugin

diff --git a/plugins/master-slave.php b/plugins/master-slave.php
new file mode 100644 (file)
index 0000000..d150ee2
--- /dev/null
+++ b/plugins/master-slave.php
@@ -0,0 +1,43 @@
+<?php
+
+/** Execute writes on master and reads on slave
+* @link http://www.adminer.org/plugins/#use
+* @author Jakub Vrana, http://www.vrana.cz/
+* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
+* @license http://www.gnu.org/licenses/gpl-2.0.html GNU General Public License, version 2 (one or other)
+*/
+class AdminerMasterSlave {
+       private $masters = array();
+       
+       /** 
+       * @param array ($slave => $master)
+       */
+       function AdminerMasterSlave($masters) {
+               $this->masters = $masters;
+       }
+       
+       function credentials() {
+               if ($_POST && isset($this->masters[SERVER])) {
+                       return array($this->masters[SERVER], $_GET["username"], get_session("pwds"));
+               }
+       }
+       
+       function login($login, $password) {
+               if (!$_POST && ($master = &$_SESSION["master"])) {
+                       $connection = connection();
+                       $connection->query("DO MASTER_POS_WAIT('" . q($master['File']) . "', $master[Position])");
+                       $master = null;
+               }
+       }
+
+       function messageQuery($query) {
+               //! doesn't work with sql.inc.php
+               $connection = connection();
+               $result = $connection->query('SHOW MASTER STATUS');
+               if ($result) {
+                       restart_session();
+                       $_SESSION["master"] = $result->fetch_assoc();
+               }
+       }
+
+}