/profiles/acquia/modules/azure/phpazure/library/Microsoft/WindowsAzure/Management/Client.php

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<?php
/**
 * Copyright (c) 2009 - 2010, RealDolmen
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of RealDolmen nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY RealDolmen ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL RealDolmen BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   Microsoft
 * @package    Microsoft_WindowsAzure
 * @subpackage Management
 * @copyright  Copyright (c) 2009 - 2010, RealDolmen (http://www.realdolmen.com)
 * @license    http://phpazure.codeplex.com/license
 * @version    $Id: Storage.php 51671 2010-09-30 08:33:45Z unknown $
 */

/**
 * @see Microsoft_AutoLoader
 */
require_once dirname(__FILE__) . '/../../AutoLoader.php';

/**
 * @category   Microsoft
 * @package    Microsoft_WindowsAzure
 * @subpackage Management
 * @copyright  Copyright (c) 2009 - 2010, RealDolmen (http://www.realdolmen.com)
 * @license    http://phpazure.codeplex.com/license
 */
class Microsoft_WindowsAzure_Management_Client
{
	/**
	 * Management service URL
	 */
	const URL_MANAGEMENT        = "https://management.core.windows.net";
	
	/**
	 * Operations
	 */
	const OP_OPERATIONS                = "operations";
	const OP_STORAGE_ACCOUNTS          = "services/storageservices";
	const OP_HOSTED_SERVICES           = "services/hostedservices";
	const OP_AFFINITYGROUPS            = "affinitygroups";
	const OP_LOCATIONS                 = "locations";
	const OP_OPERATINGSYSTEMS          = "operatingsystems";
	const OP_OPERATINGSYSTEMFAMILIES   = "operatingsystemfamilies";

	/**
	 * Current API version
	 * 
	 * @var string
	 */
	protected $_apiVersion = '2011-02-25';
	
	/**
	 * Subscription ID
	 *
	 * @var string
	 */
	protected $_subscriptionId = '';
	
	/**
	 * Management certificate path (.PEM)
	 *
	 * @var string
	 */
	protected $_certificatePath = '';
	
	/**
	 * Management certificate passphrase
	 *
	 * @var string
	 */
	protected $_certificatePassphrase = '';
	
	/**
	 * Microsoft_Http_Client channel used for communication with REST services
	 * 
	 * @var Microsoft_Http_Client
	 */
	protected $_httpClientChannel = null;	

	/**
	 * Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract instance
	 * 
	 * @var Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract
	 */
	protected $_retryPolicy = null;
	
	/**
	 * Returns the last request ID
	 * 
	 * @var string
	 */
	protected $_lastRequestId = null;
	
	/**
	 * Creates a new Microsoft_WindowsAzure_Management instance
	 * 
	 * @param string $subscriptionId Subscription ID
	 * @param string $certificatePath Management certificate path (.PEM)
	 * @param string $certificatePassphrase Management certificate passphrase
     * @param Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
	 */
	public function __construct(
		$subscriptionId,
		$certificatePath,
		$certificatePassphrase,
		Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null
	) {
		$this->_subscriptionId = $subscriptionId;
		$this->_certificatePath = $certificatePath;
		$this->_certificatePassphrase = $certificatePassphrase;
		
		$this->_retryPolicy = $retryPolicy;
		if (is_null($this->_retryPolicy)) {
		    $this->_retryPolicy = Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract::noRetry();
		}
		
		// Setup default Microsoft_Http_Client channel
		$options = array(
		    'adapter'       => 'Microsoft_Http_Client_Adapter_Socket',
		    'ssltransport'  => 'ssl',
			'sslcert'       => $this->_certificatePath,
			'sslpassphrase' => $this->_certificatePassphrase,
			'sslusecontext' => true,
		);
		if (function_exists('curl_init')) {
			// Set cURL options if cURL is used afterwards
			$options['curloptions'] = array(
					CURLOPT_FOLLOWLOCATION => true,
					CURLOPT_TIMEOUT => 120,
			);
		}
		$this->_httpClientChannel = new Microsoft_Http_Client(null, $options);
	}
	
	/**
	 * Set the HTTP client channel to use
	 * 
	 * @param Microsoft_Http_Client_Adapter_Interface|string $adapterInstance Adapter instance or adapter class name.
	 */
	public function setHttpClientChannel($adapterInstance = 'Microsoft_Http_Client_Adapter_Socket')
	{
		$this->_httpClientChannel->setAdapter($adapterInstance);
	}
	
    /**
     * Retrieve HTTP client channel
     * 
     * @return Microsoft_Http_Client_Adapter_Interface
     */
    public function getHttpClientChannel()
    {
        return $this->_httpClientChannel;
    }
	
	/**
	 * Returns the Windows Azure subscription ID
	 * 
	 * @return string
	 */
	public function getSubscriptionId()
	{
		return $this->_subscriptionId;
	}
	
	/**
	 * Returns the last request ID.
	 * 
	 * @return string
	 */
	public function getLastRequestId()
	{
		return $this->_lastRequestId;
	}
	
	/**
	 * Get base URL for creating requests
	 *
	 * @return string
	 */
	public function getBaseUrl()
	{
		return self::URL_MANAGEMENT . '/' . $this->_subscriptionId;
	}
	
	/**
	 * Perform request using Microsoft_Http_Client channel
	 *
	 * @param string $path Path
	 * @param string $queryString Query string
	 * @param string $httpVerb HTTP verb the request will use
	 * @param array $headers x-ms headers to add
	 * @param mixed $rawData Optional RAW HTTP data to be sent over the wire
	 * @return Microsoft_Http_Response
	 */
	protected function _performRequest(
		$path = '/',
		$queryString = '',
		$httpVerb = Microsoft_Http_Client::GET,
		$headers = array(),
		$rawData = null
	) {
	    // Clean path
		if (strpos($path, '/') !== 0) {
			$path = '/' . $path;
		}
			
		// Clean headers
		if (is_null($headers)) {
		    $headers = array();
		}
		
		// Ensure cUrl will also work correctly:
		//  - disable Content-Type if required
		//  - disable Expect: 100 Continue
		if (!isset($headers["Content-Type"])) {
			$headers["Content-Type"] = '';
		}
		//$headers["Expect"] = '';

		// Add version header
		$headers['x-ms-version'] = $this->_apiVersion;
		    
		// URL encoding
		$path           = self::urlencode($path);
		$queryString    = self::urlencode($queryString);

		// Generate URL and sign request
		$requestUrl     = $this->getBaseUrl() . $path . $queryString;
		$requestHeaders = $headers;

		// Prepare request 
		$this->_httpClientChannel->resetParameters(true);
		$this->_httpClientChannel->setUri($requestUrl);
		$this->_httpClientChannel->setHeaders($requestHeaders);
		$this->_httpClientChannel->setRawData($rawData);

		// Execute request
		$response = $this->_retryPolicy->execute(
		    array($this->_httpClientChannel, 'request'),
		    array($httpVerb)
		);
		
		// Store request id
		$this->_lastRequestId = $response->getHeader('x-ms-request-id');
		
		return $response;
	}
	
	/** 
	 * Parse result from Microsoft_Http_Response
	 *
	 * @param Microsoft_Http_Response $response Response from HTTP call
	 * @return object
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	protected function _parseResponse(Microsoft_Http_Response $response = null)
	{
		if (is_null($response)) {
			throw new Microsoft_WindowsAzure_Exception('Response should not be null.');
		}
		
        $xml = @simplexml_load_string($response->getBody());
        
        if ($xml !== false) {
            // Fetch all namespaces 
            $namespaces = array_merge($xml->getNamespaces(true), $xml->getDocNamespaces(true)); 
            
            // Register all namespace prefixes
            foreach ($namespaces as $prefix => $ns) { 
                if ($prefix != '') {
                    $xml->registerXPathNamespace($prefix, $ns);
                } 
            } 
        }
        
        return $xml;
	}
	
	/**
	 * URL encode function
	 * 
	 * @param  string $value Value to encode
	 * @return string        Encoded value
	 */
	public static function urlencode($value)
	{
	    return str_replace(' ', '%20', $value);
	}
	
    /**
     * Builds a query string from an array of elements
     * 
     * @param array     Array of elements
     * @return string   Assembled query string
     */
    public static function createQueryStringFromArray($queryString)
    {
    	return count($queryString) > 0 ? '?' . implode('&', $queryString) : '';
    }
    
	/**
	 * Get error message from Microsoft_Http_Response
	 *
	 * @param Microsoft_Http_Response $response Repsonse
	 * @param string $alternativeError Alternative error message
	 * @return string
	 */
	protected function _getErrorMessage(Microsoft_Http_Response $response, $alternativeError = 'Unknown error.')
	{
		$response = $this->_parseResponse($response);
		if ($response && $response->Message) {
			return (string)$response->Message;
		} else {
			return $alternativeError;
		}
	}
    
    /**
     * The Get Operation Status operation returns the status of the specified operation.
     * After calling an asynchronous operation, you can call Get Operation Status to
     * determine whether the operation has succeed, failed, or is still in progress.
     *
     * @param string $requestId The request ID. If omitted, the last request ID will be used.
     * @return Microsoft_WindowsAzure_Management_OperationStatusInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function getOperationStatus($requestId = '')
    {
    	if ($requestId == '') {
    		$requestId = $this->getLastRequestId();
    	}
    	
    	$response = $this->_performRequest(self::OP_OPERATIONS . '/' . $requestId);

    	if ($response->isSuccessful()) {
			$result = $this->_parseResponse($response);

			if (!is_null($result)) {
				return new Microsoft_WindowsAzure_Management_OperationStatusInstance(
					(string)$result->ID,
					(string)$result->Status,
					($result->Error ? (string)$result->Error->Code : ''),
					($result->Error ? (string)$result->Error->Message : '')
				);
			}
			return null;
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    

    
    /**
     * The List Subscription Operations operation returns a list of create, update,
     * and delete operations that were performed on a subscription during the specified timeframe.
     * Documentation on the parameters can be found at http://msdn.microsoft.com/en-us/library/gg715318.aspx.
     *
     * @param string $startTime The start of the timeframe to begin listing subscription operations in UTC format. This parameter and the $endTime parameter indicate the timeframe to retrieve subscription operations. This parameter cannot indicate a start date of more than 90 days in the past.
     * @param string $endTime The end of the timeframe to begin listing subscription operations in UTC format. This parameter and the $startTime parameter indicate the timeframe to retrieve subscription operations. 
     * @param string $objectIdFilter Returns subscription operations only for the specified object type and object ID. 
     * @param string $operationResultFilter Returns subscription operations only for the specified result status, either Succeeded, Failed, or InProgress.
     * @param string $continuationToken Internal usage.
     * @return array Array of Microsoft_WindowsAzure_Management_SubscriptionOperationInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function listSubscriptionOperations($startTime, $endTime, $objectIdFilter = null, $operationResultFilter = null, $continuationToken = null)
    {
    	if ($startTime == '' || is_null($startTime)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Start time should be specified.');
    	}
    	if ($endTime == '' || is_null($endTime)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('End time should be specified.');
    	}
    	if ($operationResultFilter != '' && !is_null($operationResultFilter)) {
	        $operationResultFilter = strtolower($operationResultFilter);
	    	if ($operationResultFilter != 'succeeded' && $operationResultFilter != 'failed' && $operationResultFilter != 'inprogress') {
	    		throw new Microsoft_WindowsAzure_Management_Exception('OperationResultFilter should be succeeded|failed|inprogress.');
	    	}
    	}
    	
    	$parameters = array();
    	$parameters[] = 'StartTime=' . $startTime;
    	$parameters[] = 'EndTime=' . $endTime;
    	if ($objectIdFilter != '' && !is_null($objectIdFilter)) {
    		$parameters[] = 'ObjectIdFilter=' . $objectIdFilter;
    	}
    	if ($operationResultFilter != '' && !is_null($operationResultFilter)) {
    		$parameters[] = 'OperationResultFilter=' . ucfirst($operationResultFilter);
    	}
    	if ($continuationToken != '' && !is_null($continuationToken)) {
    		$parameters[] = 'ContinuationToken=' . $continuationToken;
    	}
    	
    	$response = $this->_performRequest(self::OP_OPERATIONS, '?' . implode('&', $parameters));

    	if ($response->isSuccessful()) {
			$result = $this->_parseResponse($response);
			$namespaces = $result->getDocNamespaces(); 
    		$result->registerXPathNamespace('__empty_ns', $namespaces['']);
 
			$xmlOperations = $result->xpath('//__empty_ns:SubscriptionOperation');
			
		    // Create return value
		    $returnValue = array();		    
		    foreach ($xmlOperations as $xmlOperation) {
		    	// Create operation instance
		    	$operation = new Microsoft_WindowsAzure_Management_SubscriptionOperationInstance(
		    		$xmlOperation->OperationId,
		    		$xmlOperation->OperationObjectId,
		    		$xmlOperation->OperationName,
		    		array(),
		    		(array)$xmlOperation->OperationCaller,
		    		(array)$xmlOperation->OperationStatus
		    	);
		    	
		    	// Parse parameters
		    	$xmlOperation->registerXPathNamespace('__empty_ns', $namespaces['']); 
		    	$xmlParameters = $xmlOperation->xpath('.//__empty_ns:OperationParameter');
		    	foreach ($xmlParameters as $xmlParameter) {
		    		$xmlParameterDetails = $xmlParameter->children('http://schemas.datacontract.org/2004/07/Microsoft.Samples.WindowsAzure.ServiceManagement');
		    		$operation->addOperationParameter((string)$xmlParameterDetails->Name, (string)$xmlParameterDetails->Value);
		    	}
		    	
    		    // Add to result
    		    $returnValue[] = $operation;
		    }
		    
			// More data?
		    if (!is_null($result->ContinuationToken) && $result->ContinuationToken != '') {
		    	$returnValue = array_merge($returnValue, $this->listSubscriptionOperations($startTime, $endTime, $objectIdFilter, $operationResultFilter, (string)$result->ContinuationToken));
		    }
		    
		    // Return
		    return $returnValue;
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * Wait for an operation to complete
     * 
     * @param string $requestId The request ID. If omitted, the last request ID will be used.
     * @param int $sleepInterval Sleep interval in milliseconds.
     * @return Microsoft_WindowsAzure_Management_OperationStatusInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function waitForOperation($requestId = '', $sleepInterval = 250)
    {
    	if ($requestId == '') {
    		$requestId = $this->getLastRequestId();
    	}
    	if ($requestId == '' || is_null($requestId)) {
    		return null;
    	}

		$status = $this->getOperationStatus($requestId);
		while ($status->Status == 'InProgress') {
		  $status = $this->getOperationStatus($requestId);
		  usleep($sleepInterval);
		}
		
		return $status;
    }
    
	/**
	 * Creates a new Microsoft_WindowsAzure_Storage_Blob instance for the current account
	 *
	 * @param string $serviceName the service name to create a storage client for.
	 * @param Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
	 * @return Microsoft_WindowsAzure_Storage_Blob
	 */
	public function createBlobClientForService($serviceName, Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null)
	{
		if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
    	$storageKeys = $this->getStorageAccountKeys($serviceName);
    	
		return new Microsoft_WindowsAzure_Storage_Blob(
			Microsoft_WindowsAzure_Storage::URL_CLOUD_BLOB,
			$serviceName,
			$storageKeys[0],
			false,
			$retryPolicy
		);
	}
	
	/**
	 * Creates a new Microsoft_WindowsAzure_Storage_Table instance for the current account
	 *
	 * @param string $serviceName the service name to create a storage client for.
	 * @param Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
	 * @return Microsoft_WindowsAzure_Storage_Table
	 */
	public function createTableClientForService($serviceName, Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null)
	{
		if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
    	$storageKeys = $this->getStorageAccountKeys($serviceName);
    	
		return new Microsoft_WindowsAzure_Storage_Table(
			Microsoft_WindowsAzure_Storage::URL_CLOUD_TABLE,
			$serviceName,
			$storageKeys[0],
			false,
			$retryPolicy
		);
	}
	
	/**
	 * Creates a new Microsoft_WindowsAzure_Storage_Queue instance for the current account
	 *
	 * @param string $serviceName the service name to create a storage client for.
	 * @param Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
	 * @return Microsoft_WindowsAzure_Storage_Queue
	 */
	public function createQueueClientForService($serviceName, Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null)
	{
		if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
    	$storageKeys = $this->getStorageAccountKeys($serviceName);
    	
		return new Microsoft_WindowsAzure_Storage_Queue(
			Microsoft_WindowsAzure_Storage::URL_CLOUD_QUEUE,
			$serviceName,
			$storageKeys[0],
			false,
			$retryPolicy
		);
	}
    
    /**
     * The List Storage Accounts operation lists the storage accounts available under
     * the current subscription.
     *
     * @return array An array of Microsoft_WindowsAzure_Management_StorageServiceInstance
     */
    public function listStorageAccounts()
    {
    	$response = $this->_performRequest(self::OP_STORAGE_ACCOUNTS);

    	if ($response->isSuccessful()) {
			$result = $this->_parseResponse($response);
		    if (count($result->StorageService) > 1) {
    		    $xmlServices = $result->StorageService;
    		} else {
    		    $xmlServices = array($result->StorageService);
    		}
    		
			$services = array();
			if (!is_null($xmlServices)) {				
				for ($i = 0; $i < count($xmlServices); $i++) {
					$services[] = new Microsoft_WindowsAzure_Management_StorageServiceInstance(
					    (string)$xmlServices[$i]->Url,
					    (string)$xmlServices[$i]->ServiceName
					);
				}
			}
			return $services;
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Get Storage Account Properties operation returns the system properties for the
     * specified storage account. These properties include: the address, description, and 
     * label of the storage account; and the name of the affinity group to which the service
     * belongs, or its geo-location if it is not part of an affinity group.
     *
     * @param string $serviceName The name of your service.
     * @return Microsoft_WindowsAzure_Management_StorageServiceInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function getStorageAccountProperties($serviceName)
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
    	$response = $this->_performRequest(self::OP_STORAGE_ACCOUNTS . '/' . $serviceName);

    	if ($response->isSuccessful()) {
			$xmlService = $this->_parseResponse($response);

			if (!is_null($xmlService)) {
				return new Microsoft_WindowsAzure_Management_StorageServiceInstance(
					(string)$xmlService->Url,
					(string)$xmlService->ServiceName,
					(string)$xmlService->StorageServiceProperties->Description,
					(string)$xmlService->StorageServiceProperties->AffinityGroup,
					(string)$xmlService->StorageServiceProperties->Location,
					(string)$xmlService->StorageServiceProperties->Label
				);
			}
			return null;
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Get Storage Keys operation returns the primary
     * and secondary access keys for the specified storage account.
     *
     * @param string $serviceName The name of your service.
     * @return array An array of strings
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function getStorageAccountKeys($serviceName)
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
    	$response = $this->_performRequest(self::OP_STORAGE_ACCOUNTS . '/' . $serviceName . '/keys');

    	if ($response->isSuccessful()) {
			$xmlService = $this->_parseResponse($response);

			if (!is_null($xmlService)) {
				return array(
					(string)$xmlService->StorageServiceKeys->Primary,
					(string)$xmlService->StorageServiceKeys->Secondary
				);
			}
			return array();
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Regenerate Keys operation regenerates the primary
     * or secondary access key for the specified storage account.
     *
     * @param string $serviceName The name of your service.
     * @param string $key		  The key to regenerate (primary or secondary)
     * @return array An array of strings
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function regenerateStorageAccountKey($serviceName, $key = 'primary')
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	$key = strtolower($key);
    	if ($key != 'primary' && $key != 'secondary') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Key identifier should be primary|secondary.');
    	}
    	
    	$response = $this->_performRequest(
    		self::OP_STORAGE_ACCOUNTS . '/' . $serviceName . '/keys', '?action=regenerate',
    		Microsoft_Http_Client::POST,
    		array('Content-Type' => 'application/xml'),
    		'<?xml version="1.0" encoding="utf-8"?>
             <RegenerateKeys xmlns="http://schemas.microsoft.com/windowsazure">
               <KeyType>' . ucfirst($key) . '</KeyType>
             </RegenerateKeys>');

    	if ($response->isSuccessful()) {
			$xmlService = $this->_parseResponse($response);

			if (!is_null($xmlService)) {
				return array(
					(string)$xmlService->StorageServiceKeys->Primary,
					(string)$xmlService->StorageServiceKeys->Secondary
				);
			}
			return array();
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The List Hosted Services operation lists the hosted services available
     * under the current subscription.
     *
     * @return array An array of Microsoft_WindowsAzure_Management_HostedServiceInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function listHostedServices()
    {
    	$response = $this->_performRequest(self::OP_HOSTED_SERVICES);

    	if ($response->isSuccessful()) {
			$result = $this->_parseResponse($response);
		    if (count($result->HostedService) > 1) {
    		    $xmlServices = $result->HostedService;
    		} else {
    		    $xmlServices = array($result->HostedService);
    		}
    		
			$services = array();
			if (!is_null($xmlServices)) {				
				for ($i = 0; $i < count($xmlServices); $i++) {
					$services[] = new Microsoft_WindowsAzure_Management_HostedServiceInstance(
					    (string)$xmlServices[$i]->Url,
					    (string)$xmlServices[$i]->ServiceName
					);
				}
			}
			return $services;
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Create Hosted Service operation creates a new hosted service in Windows Azure.
     * 
     * @param string $serviceName A name for the hosted service that is unique to the subscription.
     * @param string $label A label for the hosted service. The label may be up to 100 characters in length.
     * @param string $description A description for the hosted service. The description may be up to 1024 characters in length.
     * @param string $location Required if AffinityGroup is not specified. The location where the hosted service will be created. 
     * @param string $affinityGroup Required if Location is not specified. The name of an existing affinity group associated with this subscription.
     */
    public function createHostedService($serviceName, $label, $description = '', $location = null, $affinityGroup = null)
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	if ($label == '' || is_null($label)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Label should be specified.');
    	}
        if (strlen($label) > 100) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Label is too long. The maximum length is 100 characters.');
    	}
        if (strlen($description) > 1024) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Description is too long. The maximum length is 1024 characters.');
    	}
    	if ( (is_null($location) && is_null($affinityGroup)) || (!is_null($location) && !is_null($affinityGroup)) ) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Please specify a location -or- an affinity group for the service.');
    	}
    	
    	$locationOrAffinityGroup = is_null($location)
    		? '<AffinityGroup>' . $affinityGroup . '</AffinityGroup>'
    		: '<Location>' . $location . '</Location>';
    	
        $response = $this->_performRequest(self::OP_HOSTED_SERVICES, '',
    		Microsoft_Http_Client::POST,
    		array('Content-Type' => 'application/xml; charset=utf-8'),
    		'<CreateHostedService xmlns="http://schemas.microsoft.com/windowsazure"><ServiceName>' . $serviceName . '</ServiceName><Label>' . base64_encode($label) . '</Label><Description>' . $description . '</Description>' . $locationOrAffinityGroup . '</CreateHostedService>');
 	
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Update Hosted Service operation updates the label and/or the description for a hosted service in Windows Azure.
     * 
     * @param string $serviceName A name for the hosted service that is unique to the subscription.
     * @param string $label A label for the hosted service. The label may be up to 100 characters in length.
     * @param string $description A description for the hosted service. The description may be up to 1024 characters in length.
     */
    public function updateHostedService($serviceName, $label, $description = '')
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	if ($label == '' || is_null($label)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Label should be specified.');
    	}
        if (strlen($label) > 100) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Label is too long. The maximum length is 100 characters.');
    	}
    	
        $response = $this->_performRequest(self::OP_HOSTED_SERVICES . '/' . $serviceName, '',
    		Microsoft_Http_Client::PUT,
    		array('Content-Type' => 'application/xml; charset=utf-8'),
    		'<UpdateHostedService xmlns="http://schemas.microsoft.com/windowsazure"><Label>' . base64_encode($label) . '</Label><Description>' . $description . '</Description></UpdateHostedService>');
 	
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Delete Hosted Service operation deletes the specified hosted service in Windows Azure.
     * 
     * @param string $serviceName A name for the hosted service that is unique to the subscription.
     */
    public function deleteHostedService($serviceName)
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
        $response = $this->_performRequest(self::OP_HOSTED_SERVICES . '/' . $serviceName, '', Microsoft_Http_Client::DELETE);
 	
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Get Hosted Service Properties operation retrieves system properties
     * for the specified hosted service. These properties include the service
     * name and service type; the name of the affinity group to which the service
     * belongs, or its location if it is not part of an affinity group; and
     * optionally, information on the service's deployments.
     *
     * @param string $serviceName The name of your service.
     * @return Microsoft_WindowsAzure_Management_HostedServiceInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function getHostedServiceProperties($serviceName)
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	
    	$response = $this->_performRequest(self::OP_HOSTED_SERVICES . '/' . $serviceName, '?embed-detail=true');

    	if ($response->isSuccessful()) {
			$xmlService = $this->_parseResponse($response);

			if (!is_null($xmlService)) {
				$returnValue = new Microsoft_WindowsAzure_Management_HostedServiceInstance(
					(string)$xmlService->Url,
					(string)$xmlService->ServiceName,
					(string)$xmlService->HostedServiceProperties->Description,
					(string)$xmlService->HostedServiceProperties->AffinityGroup,
					(string)$xmlService->HostedServiceProperties->Location,
					(string)$xmlService->HostedServiceProperties->Label
				);
				
				// Deployments
		    	if (count($xmlService->Deployments->Deployment) > 1) {
    		    	$xmlServices = $xmlService->Deployments->Deployment;
    			} else {
    		    	$xmlServices = array($xmlService->Deployments->Deployment);
    			}
    			
    			$deployments = array();
    			foreach ($xmlServices as $xmlDeployment) {
					$deployments[] = $this->_convertXmlElementToDeploymentInstance($xmlDeployment);
    			}
				$returnValue->Deployments = $deployments;
				
				return $returnValue;
			}
			return null;
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }

    /**
     * The Create Deployment operation uploads a new service package
     * and creates a new deployment on staging or production.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentSlot	The deployment slot (production or staging)
	 * @param string $name              The name for the deployment. The deployment ID as listed on the Windows Azure management portal must be unique among other deployments for the hosted service.
	 * @param string $label             A URL that refers to the location of the service package in the Blob service. The service package must be located in a storage account beneath the same subscription.
	 * @param string $packageUrl        The service configuration file for the deployment.
	 * @param string $configuration     A label for this deployment, up to 100 characters in length.
	 * @param boolean $startDeployment  Indicates whether to start the deployment immediately after it is created.
	 * @param boolean $treatWarningsAsErrors Indicates whether to treat package validation warnings as errors.
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function createDeployment($serviceName, $deploymentSlot, $name, $label, $packageUrl, $configuration, $startDeployment = false, $treatWarningsAsErrors = false)
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	$deploymentSlot = strtolower($deploymentSlot);
    	if ($deploymentSlot != 'production' && $deploymentSlot != 'staging') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment slot should be production|staging.');
    	}
    	if ($name == '' || is_null($name)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Name should be specified.');
    	}
    	if ($label == '' || is_null($label)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Label should be specified.');
    	}
        if (strlen($label) > 100) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Label is too long. The maximum length is 100 characters.');
    	}
    	if ($packageUrl == '' || is_null($packageUrl)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Package URL should be specified.');
    	}
    	if ($configuration == '' || is_null($configuration)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Configuration should be specified.');
    	}
    	
    	if (@file_exists($configuration)) {
    		$configuration = utf8_decode(file_get_contents($configuration));
    	}
    	
    	// Clean up the configuration
    	$conformingConfiguration = $this->_cleanConfiguration($configuration);
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deploymentslots/' . $deploymentSlot;
        $response = $this->_performRequest($operationUrl, '',
    		Microsoft_Http_Client::POST,
    		array('Content-Type' => 'application/xml; charset=utf-8'),
    		'<CreateDeployment xmlns="http://schemas.microsoft.com/windowsazure"><Name>' . $name . '</Name><PackageUrl>' . $packageUrl . '</PackageUrl><Label>' . base64_encode($label) . '</Label><Configuration>' . base64_encode($conformingConfiguration) . '</Configuration><StartDeployment>' . ($startDeployment ? 'true' : 'false') . '</StartDeployment><TreatWarningsAsError>' . ($treatWarningsAsErrors ? 'true' : 'false') . '</TreatWarningsAsError></CreateDeployment>');
 	
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}    	
    }
    
    /**
     * The Get Deployment operation returns configuration information, status,
     * and system properties for the specified deployment.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentSlot	The deployment slot (production or staging)
     * @return Microsoft_WindowsAzure_Management_DeploymentInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function getDeploymentBySlot($serviceName, $deploymentSlot)
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	$deploymentSlot = strtolower($deploymentSlot);
    	if ($deploymentSlot != 'production' && $deploymentSlot != 'staging') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment slot should be production|staging.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deploymentslots/' . $deploymentSlot;
    	return $this->_getDeployment($operationUrl);
    }
    
    /**
     * The Get Deployment operation returns configuration information, status,
     * and system properties for the specified deployment.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentId	The deployment ID as listed on the Windows Azure management portal
     * @return Microsoft_WindowsAzure_Management_DeploymentInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function getDeploymentByDeploymentId($serviceName, $deploymentId)
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
        if ($deploymentId == '' || is_null($deploymentId)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment ID should be specified.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deployments/' . $deploymentId;
    	return $this->_getDeployment($operationUrl);
    }
    
    /**
     * The Get Deployment operation returns configuration information, status,
     * and system properties for the specified deployment.
     * 
     * @param string $operationUrl		The operation url
     * @return Microsoft_WindowsAzure_Management_DeploymentInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    protected function _getDeployment($operationUrl)
    {
        $response = $this->_performRequest($operationUrl);

    	if ($response->isSuccessful()) {
			$xmlService = $this->_parseResponse($response);
			
			return $this->_convertXmlElementToDeploymentInstance($xmlService);
		} else {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Swap Deployment operation initiates a virtual IP swap between
     * the staging and production deployment environments for a service.
     * If the service is currently running in the staging environment,
     * it will be swapped to the production environment. If it is running
     * in the production environment, it will be swapped to staging.
     * 
     * @param string $serviceName The service name.
     * @param string $productionDeploymentName The name of the production deployment.
     * @param string $sourceDeploymentName The name of the source deployment.
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function swapDeployment($serviceName, $productionDeploymentName, $sourceDeploymentName)
    {
    	if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	if ($productionDeploymentName == '' || is_null($productionDeploymentName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Production Deployment ID should be specified.');
    	}
    	if ($sourceDeploymentName == '' || is_null($sourceDeploymentName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Source Deployment ID should be specified.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName;
        $response = $this->_performRequest($operationUrl, '',
    		Microsoft_Http_Client::POST,
    		array('Content-Type' => 'application/xml; charset=utf-8'),
    		'<Swap xmlns="http://schemas.microsoft.com/windowsazure"><Production>' . $productionDeploymentName . '</Production><SourceDeployment>' . $sourceDeploymentName . '</SourceDeployment></Swap>');
    		
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}    	
    }
    
    /**
     * The Delete Deployment operation deletes the specified deployment.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentSlot	The deployment slot (production or staging)
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function deleteDeploymentBySlot($serviceName, $deploymentSlot)
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	$deploymentSlot = strtolower($deploymentSlot);
    	if ($deploymentSlot != 'production' && $deploymentSlot != 'staging') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment slot should be production|staging.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deploymentslots/' . $deploymentSlot;
    	return $this->_deleteDeployment($operationUrl);
    }
    
    /**
     * The Delete Deployment operation deletes the specified deployment.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentId	The deployment ID as listed on the Windows Azure management portal
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function deleteDeploymentByDeploymentId($serviceName, $deploymentId)
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	if ($deploymentId == '' || is_null($deploymentId)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment ID should be specified.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deployments/' . $deploymentId;
    	return $this->_deleteDeployment($operationUrl);
    }
    
    /**
     * The Delete Deployment operation deletes the specified deployment.
     * 
     * @param string $operationUrl		The operation url
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    protected function _deleteDeployment($operationUrl)
    {
        $response = $this->_performRequest($operationUrl, '', Microsoft_Http_Client::DELETE);
			 
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * The Update Deployment Status operation initiates a change in deployment status.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentSlot	The deployment slot (production or staging)
     * @param string $status            The deployment status (running|suspended)
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function updateDeploymentStatusBySlot($serviceName, $deploymentSlot, $status = 'running')
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	$deploymentSlot = strtolower($deploymentSlot);
    	if ($deploymentSlot != 'production' && $deploymentSlot != 'staging') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment slot should be production|staging.');
    	}
    	$status = strtolower($status);
    	if ($status != 'running' && $status != 'suspended') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Status should be running|suspended.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deploymentslots/' . $deploymentSlot;
    	return $this->_updateDeploymentStatus($operationUrl, $status);
    }
    
    /**
     * The Update Deployment Status operation initiates a change in deployment status.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentId	The deployment ID as listed on the Windows Azure management portal
     * @param string $status            The deployment status (running|suspended)
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    public function updateDeploymentStatusByDeploymentId($serviceName, $deploymentId, $status = 'running')
    {
        if ($serviceName == '' || is_null($serviceName)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Service name should be specified.');
    	}
    	if ($deploymentId == '' || is_null($deploymentId)) {
    		throw new Microsoft_WindowsAzure_Management_Exception('Deployment ID should be specified.');
    	}
        $status = strtolower($status);
    	if ($status != 'running' && $status != 'suspended') {
    		throw new Microsoft_WindowsAzure_Management_Exception('Status should be running|suspended.');
    	}
    	
    	$operationUrl = self::OP_HOSTED_SERVICES . '/' . $serviceName . '/deployments/' . $deploymentId;
    	return $this->_updateDeploymentStatus($operationUrl, $status);
    }
    
    /**
     * The Update Deployment Status operation initiates a change in deployment status.
     * 
     * @param string $operationUrl		The operation url
     * @param string $status            The deployment status (running|suspended)
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    protected function _updateDeploymentStatus($operationUrl, $status = 'running')
    {
        $response = $this->_performRequest($operationUrl . '/', '?comp=status',
    		Microsoft_Http_Client::POST,
    		array('Content-Type' => 'application/xml; charset=utf-8'),
    		'<UpdateDeploymentStatus xmlns="http://schemas.microsoft.com/windowsazure"><Status>' . ucfirst($status) . '</Status></UpdateDeploymentStatus>');
    		
    	if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Management_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
    }
    
    /**
     * Converts an XmlElement into a Microsoft_WindowsAzure_Management_DeploymentInstance
     * 
     * @param object $xmlService The XML Element
     * @return Microsoft_WindowsAzure_Management_DeploymentInstance
     * @throws Microsoft_WindowsAzure_Management_Exception
     */
    protected function _convertXmlElementToDeploymentInstance($xmlService)
    {
		if (!is_null($xmlService)) {
			$returnValue = new Microsoft_WindowsAzure_Management_DeploymentInstance(
				(string)$xmlService->Name,
				(string)$xmlService->DeploymentSlot,
				(string)$xmlService->PrivateID,
				(string)$xmlService->Label,
				(string)$xmlService->Url,
				(string)$xmlService->Configuration,
				(string)$xmlService->Status,
				(string)$xmlService->UpgradeStatus,
				(string)$xmlService->UpgradeType,
				(string)$xmlService->CurrentUpgradeDomainState,
				(string)$xmlService->CurrentUpgradeDomain,
				(string)$xmlService->UpgradeDomainCount
			);
				
			// Append role instances
			$xmlRoleInstances = $xmlService->RoleInstanceList->RoleInstance;
			if (count($xmlService->RoleInstanceList->RoleInstance) == 1) {
	    	    $xmlRoleInstances = array($xmlService->RoleInstanceList->RoleInstance);
	    	}
	    		
			$roleInstances = array();
			if (!is_null($xmlRoleInstances)) {				
				for ($i = 0; $i < count($xmlRoleInstances); $i++) {
					$roleInstances[] = array(
					    'rolename' => (string)$xmlRoleInstances[$i]->RoleName,
					    'instancename' => (string)$xmlRoleInstances[$i]->InstanceName,
					    'instancestatus' => (string)$xmlRoleInstances[$i]->InstanceStatus
					);
				}
			}
			
			$returnValue->RoleInstanceList = $roleInstances;
			
			// Append roles
			$xmlRoles = $xmlService->RoleList->Role;
			if (count($xmlService->RoleList->Role) == 1) {
	    	    $xmlRoles = array($xmlService->RoleList->Role);
	    	}
    		
			$roles = array();
			if (!is_null($xmlRoles)) {				
				for ($i = 0; $i < count($xmlRoles); $i++) {
					$roles[] = array(
					    'rolename' => (string)$xmlRoles[$i]->RoleName,
					    'osversion' => (!is_null($xmlRoles[$i]->OsVersion) ? (string)$xmlRoles[$i]->OsVersion : (string)$xmlRoles[$i]->OperatingSystemVersion)					
					);
				}
			}
			$returnValue->RoleList = $roles;
				
			return $returnValue;
		}
		return null;
    }
    
    /**
     * Updates a deployment's role instance count.
     * 
     * @param string $serviceName		The service name
     * @param string $deploymentSlot	The deployment slot (production or staging)
     * @param string|array $roleName	The role name
     * @param string|array $instanceCount The instance count
     * @throws Microsoft_Win…

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