protected function createStorageInstance()
 {
     $storageClient = null;
     if (TESTS_ZEND_SERVICE_WINDOWSAZURE_BLOB_RUNONPROD) {
         $storageClient = new Zend_Service_WindowsAzure_Storage_Blob(TESTS_ZEND_SERVICE_WINDOWSAZURE_BLOB_HOST_PROD, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_ACCOUNT_PROD, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_KEY_PROD, false, Zend_Service_WindowsAzure_RetryPolicy_AbstractRetryPolicy::retryN(10, 250));
     } else {
         $storageClient = new Zend_Service_WindowsAzure_Storage_Blob(TESTS_ZEND_SERVICE_WINDOWSAZURE_BLOB_HOST_DEV, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_ACCOUNT_DEV, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_KEY_DEV, true, Zend_Service_WindowsAzure_RetryPolicy_AbstractRetryPolicy::retryN(10, 250));
     }
     if (TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_USEPROXY) {
         $storageClient->setProxy(TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_USEPROXY, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_PROXY, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_PROXY_PORT, TESTS_ZEND_SERVICE_WINDOWSAZURE_STORAGE_PROXY_CREDENTIALS);
     }
     return $storageClient;
 }

 /**
  * Retrieve storage client for this stream type
  * 
  * @param string $path
  * @return Zend_Service_WindowsAzure_Storage_Blob
  */
 protected function _getStorageClient($path = '')
 {
     if (is_null($this->_storageClient)) {
         $url = explode(':', $path);
         if (!$url) {
             throw new Zend_Service_WindowsAzure_Exception('Could not parse path "' . $path . '".');
         }
         $this->_storageClient = Zend_Service_WindowsAzure_Storage_Blob::getWrapperClient($url[0]);
         if (!$this->_storageClient) {
             throw new Zend_Service_WindowsAzure_Exception('No storage client registered for stream type "' . $url[0] . '://".');
         }
     }
     return $this->_storageClient;
 }

 /**
  * Set configuration for a specific role instance
  * 
  * @param string $roleInstance Role instance name, can be found in $_SERVER['RdRoleId'] when hosted on Windows Azure.
  * @param Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance $configuration Configuration to apply
  * @throws Zend_Service_WindowsAzure_Diagnostics_Exception
  */
 public function setConfigurationForRoleInstance($roleInstance = null, Zend_Service_WindowsAzure_Diagnostics_ConfigurationInstance $configuration)
 {
     if ($roleInstance === null) {
         throw new Zend_Service_WindowsAzure_Diagnostics_Exception('Role instance should be specified. Try reading $_SERVER[\'RdRoleId\'] for this information if the application is hosted on Windows Azure Fabric or Development Fabric.');
     }
     $this->_blobStorageClient->putBlobData($this->_controlContainer, $roleInstance, $configuration->toXml(), array(), null, array('Content-Type' => 'text/xml'));
 }

 /**
  * Garbage collector
  * 
  * @param int $lifeTime Session maximal lifetime
  * @see session.gc_divisor  100
  * @see session.gc_maxlifetime 1440
  * @see session.gc_probability 1
  * @usage Execution rate 1/100 (session.gc_probability/session.gc_divisor)
  * @return boolean
  */
 public function gc($lifeTime)
 {
     if ($this->_storageType == self::STORAGE_TYPE_TABLE) {
         // In table storage
         try {
             $result = $this->_storage->retrieveEntities($this->_sessionContainer, 'PartitionKey eq \'' . $this->_sessionContainerPartition . '\' and sessionExpires lt ' . (time() - $lifeTime));
             foreach ($result as $sessionRecord) {
                 $this->_storage->deleteEntity($this->_sessionContainer, $sessionRecord);
             }
             return true;
         } catch (Zend_Service_WindowsAzure_exception $ex) {
             return false;
         }
     } else {
         if ($this->_storageType == self::STORAGE_TYPE_BLOB) {
             // In blob storage
             try {
                 $result = $this->_storage->listBlobs($this->_sessionContainer, $this->_sessionContainerPartition, '', null, null, 'metadata');
                 foreach ($result as $sessionRecord) {
                     if ($sessionRecord->Metadata['sessionexpires'] < time() - $lifeTime) {
                         $this->_storage->deleteBlob($this->_sessionContainer, $sessionRecord->Name);
                     }
                 }
                 return true;
             } catch (Zend_Service_WindowsAzure_exception $ex) {
                 return false;
             }
         }
     }
 }

 /**
  * Delete container
  *
  * @return void
  */
 public function deleteContainer()
 {
     try {
         $this->_storageClient->deleteContainer($this->_container);
     } catch (Zend_Service_WindowsAzure_Exception $e) {
         throw new Zend_Cloud_StorageService_Exception('Error on delete: ' . $e->getMessage(), $e->getCode(), $e);
     }
 }