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ZeedFramework/library/Zeed/Db.php

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+<?php
+/**
+ * Zeed Platform Project
+ * Based on Zeed Framework & Zend Framework.
+ *
+ * BTS - Billing Transaction Service
+ * CAS - Central Authentication Service
+ *
+ * LICENSE
+ * http://www.zeed.com.cn/license/
+ *
+ * @category   Zeed
+ * @package    Zeed_Db
+ * @copyright  Copyright (c) 2010 Zeed Technologies PRC Inc. (http://www.zeed.com.cn)
+ * @author     Zeed Team (http://blog.zeed.com.cn)
+ * @since      2010-6-30
+ * @version    SVN: $Id: Db.php 6710 2010-09-08 13:51:53Z xsharp $
+ */
+
+class Zeed_Db extends Zend_Db
+{
+    // Database instances
+    public static $instances = null;
+
+    public static $metaCacheEnable = false;
+
+    /**
+     * 数据库连接单列模式
+     * 这里处理是否有多个数据配置
+     *
+     * @param string $name 连接的数据库SchemaName
+     * @param mixed configuration array or DSN
+     * @return Zend_Db_Adapter_Abstract
+     */
+    public static function &instance($name = 'default', $config = NULL)
+    {
+        if (empty($config)) {
+            $config = Zeed_Config::loadGroup('database.' . $name);
+        }
+
+        if (! isset(self::$instances[$name])) {
+            /**
+             * @todo 判断是否已有相同服务器&相同用户名
+             */
+            self::$instances[$name] = parent::factory($config['adapter'], $config);
+            if (isset($config['metacache'])) {
+                self::$metaCacheEnable = $config['metacache'];
+            }
+            if (isset($config['profiler']) && $config['profiler']) {
+                self::$instances[$name]->getProfiler()->setEnabled(true);
+            }
+        }
+
+        return self::$instances[$name];
+    }
+
+    /**
+     * 获取指定MODEL的实例
+     *
+     * @param string $name
+     * @return Zeed_Db_Model
+     */
+    public static function getModel($name)
+    {
+        return Zeed_Db_Model::getModel($name);
+    }
+}
+
+// End ^ LF ^ UTF-8