99 lines
2.6 KiB
PHP
99 lines
2.6 KiB
PHP
<?php
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/**
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* LICENSE: Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* PHP version 5
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*
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* @category Microsoft
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* @package WindowsAzure\Common\Internal
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* @author Azure PHP SDK <azurephpsdk@microsoft.com>
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* @copyright 2012 Microsoft Corporation
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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* @link https://github.com/windowsazure/azure-sdk-for-php
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*/
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namespace WindowsAzure\Common\Internal;
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/**
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* Holder for default connection string sources used in CloudConfigurationManager.
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*
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* @category Microsoft
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* @package WindowsAzure\Common\Internal
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* @author Azure PHP SDK <azurephpsdk@microsoft.com>
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* @copyright 2012 Microsoft Corporation
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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* @version Release: 0.4.1_2015-03
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* @link https://github.com/windowsazure/azure-sdk-for-php
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*/
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class ConnectionStringSource
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{
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/**
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* The list of all sources which comes as default.
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*
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* @var type
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*/
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private static $_defaultSources;
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/**
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* @var boolean
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*/
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private static $_isInitialized;
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/**
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* Environment variable source name.
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*/
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const ENVIRONMENT_SOURCE = 'environment_source';
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/**
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* Initializes the default sources.
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*
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* @return none
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*/
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private static function _init()
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{
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if (!self::$_isInitialized) {
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self::$_defaultSources = array(
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self::ENVIRONMENT_SOURCE => array(__CLASS__, 'environmentSource')
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);
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self::$_isInitialized = true;
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}
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}
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/**
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* Gets a connection string value from the system environment.
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*
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* @param string $key The connection string name.
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*
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* @return string
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*/
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public static function environmentSource($key)
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{
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Validate::isString($key, 'key');
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return getenv($key);
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}
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/**
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* Gets list of default sources.
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*
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* @return array
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*/
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public static function getDefaultSources()
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{
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self::_init();
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return self::$_defaultSources;
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}
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}
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