1: <?php
 2: /**
 3:  * Magento
 4:  *
 5:  * NOTICE OF LICENSE
 6:  *
 7:  * This source file is subject to the Open Software License (OSL 3.0)
 8:  * that is bundled with this package in the file LICENSE.txt.
 9:  * It is also available through the world-wide-web at this URL:
10:  * http://opensource.org/licenses/osl-3.0.php
11:  * If you did not receive a copy of the license and are unable to
12:  * obtain it through the world-wide-web, please send an email
13:  * to license@magentocommerce.com so we can send you a copy immediately.
14:  *
15:  * DISCLAIMER
16:  *
17:  * Do not edit or add to this file if you wish to upgrade Magento to newer
18:  * versions in the future. If you wish to customize Magento for your
19:  * needs please refer to http://www.magentocommerce.com for more information.
20:  *
21:  * @category    Mage
22:  * @package     Mage_Core
23:  * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
24:  * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
25:  */
26: 
27: 
28: /**
29:  * Abstract storage resource model
30:  *
31:  * @category    Mage
32:  * @package     Mage_Core
33:  * @author      Magento Core Team <core@magentocommerce.com>
34:  */
35: abstract class Mage_Core_Model_Resource_File_Storage_Abstract extends Mage_Core_Model_Resource_Db_Abstract
36: {
37:     /**
38:      * File storage connection name
39:      *
40:      * @var string
41:      */
42:     protected $_connectionName = null;
43: 
44:     /**
45:      * Sets name of connection the resource will use
46:      *
47:      * @param string $name
48:      * @return Mage_Core_Model_Resource_File_Storage_Abstract
49:      */
50:     public function setConnectionName($name)
51:     {
52:         $this->_connectionName = $name;
53:         return $this;
54:     }
55: 
56:     /**
57:      * Retrieve connection for read data
58:      *
59:      * @return Varien_Db_Adapter_Interface
60:      */
61:     protected function _getReadAdapter()
62:     {
63:         return $this->_getConnection($this->_connectionName);
64:     }
65: 
66:     /**
67:      * Retrieve connection for write data
68:      *
69:      * @return Varien_Db_Adapter_Interface
70:      */
71:     protected function _getWriteAdapter()
72:     {
73:         return $this->_getConnection($this->_connectionName);
74:     }
75: 
76:     /**
77:      * Get connection by name or type
78:      *
79:      * @param string $connectionName
80:      * @return Varien_Db_Adapter_Interface
81:      */
82:     protected function _getConnection($connectionName)
83:     {
84:         if (isset($this->_connections[$connectionName])) {
85:             return $this->_connections[$connectionName];
86:         }
87: 
88:         $this->_connections[$connectionName] = $this->_resources->getConnection($connectionName);
89: 
90:         return $this->_connections[$connectionName];
91:     }
92: }
93: