tinyshare /vendor/Microsoft/WindowsAzure/Storage/Queue.php

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<?php
/**
 * Copyright (c) 2009 - 2011, 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 Storage
 * @copyright  Copyright (c) 2009 - 2011, RealDolmen (http://www.realdolmen.com)
 * @license    http://todo     name_todo
 * @version    $Id: Blob.php 24241 2009-07-22 09:43:13Z unknown $
 */

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


/**
 * @category   Microsoft
 * @package    Microsoft_WindowsAzure
 * @subpackage Storage
 * @copyright  Copyright (c) 2009 - 2011, RealDolmen (http://www.realdolmen.com)
 * @license    http://phpazure.codeplex.com/license
 */
class Microsoft_WindowsAzure_Storage_Queue extends Microsoft_WindowsAzure_Storage
{
	/**
	 * Maximal message size (in bytes)
	 */
	const MAX_MESSAGE_SIZE = 8388608;
	
	/**
	 * Maximal message ttl (in seconds)
	 */
	const MAX_MESSAGE_TTL = 604800;
	
	/**
	 * Creates a new Microsoft_WindowsAzure_Storage_Queue instance
	 *
	 * @param string $host Storage host name
	 * @param string $accountName Account name for Windows Azure
	 * @param string $accountKey Account key for Windows Azure
	 * @param boolean $usePathStyleUri Use path-style URI's
	 * @param Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
	 */
	public function __construct($host = Microsoft_WindowsAzure_Storage::URL_DEV_QUEUE, $accountName = Microsoft_WindowsAzure_Credentials_CredentialsAbstract::DEVSTORE_ACCOUNT, $accountKey = Microsoft_WindowsAzure_Credentials_CredentialsAbstract::DEVSTORE_KEY, $usePathStyleUri = false, Microsoft_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null)
	{
		parent::__construct($host, $accountName, $accountKey, $usePathStyleUri, $retryPolicy);
		
		// API version
		$this->_apiVersion = '2009-09-19';
	}
	
	/**
	 * Check if a queue exists
	 * 
	 * @param string $queueName Queue name
	 * @return boolean
	 */
	public function queueExists($queueName = '')
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
			
		// List queues
        $queues = $this->listQueues($queueName, 1);
        foreach ($queues as $queue) {
            if ($queue->Name == $queueName) {
                return true;
            }
        }
        
        return false;
	}
	
	/**
	 * Create queue
	 *
	 * @param string $queueName Queue name
	 * @param array  $metadata  Key/value pairs of meta data
	 * @return object Queue properties
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function createQueue($queueName = '', $metadata = array())
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
			
		// Create metadata headers
		$headers = array();
		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata)); 
		
		// Perform request
		$response = $this->_performRequest($queueName, array(), Microsoft_Http_Client::PUT, $headers);	
		if ($response->isSuccessful()) {
		    return new Microsoft_WindowsAzure_Storage_QueueInstance(
		        $queueName,
		        $metadata
		    );
		} else {
			throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * Create queue if it does not exist
	 *
	 * @param string $queueName Queue name
	 * @param array  $metadata  Key/value pairs of meta data
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function createQueueIfNotExists($queueName = '', $metadata = array())
	{
		if (!$this->queueExists($queueName)) {
			$this->createQueue($queueName, $metadata);
		}
	}
	
	/**
	 * Get queue
	 * 
	 * @param string $queueName  Queue name
	 * @return Microsoft_WindowsAzure_Storage_QueueInstance
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function getQueue($queueName = '')
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
		    
		// Perform request
		$response = $this->_performRequest($queueName, array('comp' => 'metadata'), Microsoft_Http_Client::GET);	
		if ($response->isSuccessful()) {
		    // Parse metadata
		    $metadata = $this->_parseMetadataHeaders($response->getHeaders());

		    // Return queue
		    $queue = new Microsoft_WindowsAzure_Storage_QueueInstance(
		        $queueName,
		        $metadata
		    );
		    $queue->ApproximateMessageCount = intval($response->getHeader('x-ms-approximate-message-count'));
		    return $queue;
		} else {
		    throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * Get queue metadata
	 * 
	 * @param string $queueName  Queue name
	 * @return array Key/value pairs of meta data
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function getQueueMetadata($queueName = '')
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
			
	    return $this->getQueue($queueName)->Metadata;
	}
	
	/**
	 * Set queue metadata
	 * 
	 * Calling the Set Queue Metadata operation overwrites all existing metadata that is associated with the queue. It's not possible to modify an individual name/value pair.
	 *
	 * @param string $queueName  Queue name
	 * @param array  $metadata       Key/value pairs of meta data
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function setQueueMetadata($queueName = '', $metadata = array())
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
		if (count($metadata) == 0) {
		    return;
		}
		    
		// Create metadata headers
		$headers = array();
		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata)); 
		
		// Perform request
		$response = $this->_performRequest($queueName, array('comp' => 'metadata'), Microsoft_Http_Client::PUT, $headers);

		if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * Delete queue
	 *
	 * @param string $queueName Queue name
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function deleteQueue($queueName = '')
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
			
		// Perform request
		$response = $this->_performRequest($queueName, array(), Microsoft_Http_Client::DELETE);
		if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * List queues
	 *
	 * @param string $prefix     Optional. Filters the results to return only queues whose name begins with the specified prefix.
	 * @param int    $maxResults Optional. Specifies the maximum number of queues to return per call to Azure storage. This does NOT affect list size returned by this function. (maximum: 5000)
	 * @param string $marker     Optional string value that identifies the portion of the list to be returned with the next list operation.
	 * @param string $include    Optional. Include this parameter to specify that the queue's metadata be returned as part of the response body. (allowed values: '', 'metadata')
	 * @param int    $currentResultCount Current result count (internal use)
	 * @return array
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function listQueues($prefix = null, $maxResults = null, $marker = null, $include = null, $currentResultCount = 0)
	{
	    // Build query string
		$query = array('comp' => 'list');
        if (!is_null($prefix)) {
	        $query['prefix'] = $prefix;
        }
	    if (!is_null($maxResults)) {
	        $query['maxresults'] = $maxResults;
	    }
	    if (!is_null($marker)) {
	        $query['marker'] = $marker;
	    }
		if (!is_null($include)) {
	        $query['include'] = $include;
	    }
	        
		// Perform request
		$response = $this->_performRequest('', $query, Microsoft_Http_Client::GET);	
		if ($response->isSuccessful()) {
			$xmlQueues = $this->_parseResponse($response)->Queues->Queue;
			$xmlMarker = (string)$this->_parseResponse($response)->NextMarker;

			$queues = array();
			if (!is_null($xmlQueues)) {
				for ($i = 0; $i < count($xmlQueues); $i++) {
					$queues[] = new Microsoft_WindowsAzure_Storage_QueueInstance(
						(string)$xmlQueues[$i]->Name,
						$this->_parseMetadataElement($xmlQueues[$i])
					);
				}
			}
			$currentResultCount = $currentResultCount + count($queues);
			if (!is_null($maxResults) && $currentResultCount < $maxResults) {
    			if (!is_null($xmlMarker) && $xmlMarker != '') {
    			    $queues = array_merge($queues, $this->listQueues($prefix, $maxResults, $xmlMarker, $include, $currentResultCount));
    			}
			}
			if (!is_null($maxResults) && count($queues) > $maxResults) {
			    $queues = array_slice($queues, 0, $maxResults);
			}
			    
			return $queues;
		} else {
			throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * Put message into queue
	 *
	 * @param string $queueName  Queue name
	 * @param string $message    Message
	 * @param int    $ttl        Message Time-To-Live (in seconds). Defaults to 7 days if the parameter is omitted.
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function putMessage($queueName = '', $message = '', $ttl = null)
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
		if (strlen($message) > self::MAX_MESSAGE_SIZE) {
		    throw new Microsoft_WindowsAzure_Exception('Message is too big. Message content should be < 8KB.');
		}
		if ($message == '') {
		    throw new Microsoft_WindowsAzure_Exception('Message is not specified.');
		}
		if (!is_null($ttl) && ($ttl <= 0 || $ttl > self::MAX_MESSAGE_SIZE)) {
		    throw new Microsoft_WindowsAzure_Exception('Message TTL is invalid. Maximal TTL is 7 days (' . self::MAX_MESSAGE_SIZE . ' seconds) and should be greater than zero.');
		}
		    
	    // Build query string
		$query = array();
        if (!is_null($ttl)) {
	        $query['messagettl'] = $ttl;
        }
	        
	    // Build body
	    $rawData = '';
	    $rawData .= '<QueueMessage>';
	    $rawData .= '    <MessageText>' . base64_encode($message) . '</MessageText>';
	    $rawData .= '</QueueMessage>';
	        
		// Perform request
		$response = $this->_performRequest($queueName . '/messages', $query, Microsoft_Http_Client::POST, array(), false, $rawData);

		if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Exception('Error putting message into queue.');
		}
	}
	
	/**
	 * Get queue messages
	 *
	 * @param string $queueName         Queue name
	 * @param string $numOfMessages     Optional. A nonzero integer value that specifies the number of messages to retrieve from the queue, up to a maximum of 32. By default, a single message is retrieved from the queue with this operation.
	 * @param int    $visibilityTimeout Optional. An integer value that specifies the message's visibility timeout in seconds. The maximum value is 2 hours. The default message visibility timeout is 30 seconds.
	 * @param string $peek              Peek only?
	 * @return array
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function getMessages($queueName = '', $numOfMessages = 1, $visibilityTimeout = null, $peek = false)
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
		if ($numOfMessages < 1 || $numOfMessages > 32 || intval($numOfMessages) != $numOfMessages) {
		    throw new Microsoft_WindowsAzure_Exception('Invalid number of messages to retrieve.');
		}
		if (!is_null($visibilityTimeout) && ($visibilityTimeout <= 0 || $visibilityTimeout > 7200)) {
		    throw new Microsoft_WindowsAzure_Exception('Visibility timeout is invalid. Maximum value is 2 hours (7200 seconds) and should be greater than zero.');
		}
		    
	    // Build query string
		$query = array();
    	if ($peek) {
    	    $query['peekonly'] = 'true';
    	}
    	if ($numOfMessages > 1) {
	        $query['numofmessages'] = $numOfMessages;
    	}
    	if (!$peek && !is_null($visibilityTimeout)) {
	        $query['visibilitytimeout'] = $visibilityTimeout;
    	}  
	        
		// Perform request
		$response = $this->_performRequest($queueName . '/messages', $query, Microsoft_Http_Client::GET);	
		if ($response->isSuccessful()) {
		    // Parse results
			$result = $this->_parseResponse($response);
		    if (!$result) {
		        return array();
		    }

		    $xmlMessages = null;
		    if (count($result->QueueMessage) > 1) {
    		    $xmlMessages = $result->QueueMessage;
    		} else {
    		    $xmlMessages = array($result->QueueMessage);
    		}

			$messages = array();
			for ($i = 0; $i < count($xmlMessages); $i++) {
				$messages[] = new Microsoft_WindowsAzure_Storage_QueueMessage(
					(string)$xmlMessages[$i]->MessageId,
					(string)$xmlMessages[$i]->InsertionTime,
					(string)$xmlMessages[$i]->ExpirationTime,
					($peek ? '' : (string)$xmlMessages[$i]->PopReceipt),
					($peek ? '' : (string)$xmlMessages[$i]->TimeNextVisible),
					(string)$xmlMessages[$i]->DequeueCount,
					base64_decode((string)$xmlMessages[$i]->MessageText)
			    );
			}
			    
			return $messages;
		} else {
			throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * Peek queue messages
	 *
	 * @param string $queueName         Queue name
	 * @param string $numOfMessages     Optional. A nonzero integer value that specifies the number of messages to retrieve from the queue, up to a maximum of 32. By default, a single message is retrieved from the queue with this operation.
	 * @return array
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function peekMessages($queueName = '', $numOfMessages = 1)
	{
	    return $this->getMessages($queueName, $numOfMessages, null, true);
	}
	
	/**
	 * Checks to see if a given queue has messages
	 *
	 * @param string $queueName         Queue name
	 * @return boolean
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function hasMessages($queueName = '')
	{
		return count($this->peekMessages($queueName)) > 0;
	}
	
	/**
	 * Clear queue messages
	 *
	 * @param string $queueName         Queue name
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function clearMessages($queueName = '')
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}

		// Perform request
		$response = $this->_performRequest($queueName . '/messages', array(), Microsoft_Http_Client::DELETE);	
		if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Exception('Error clearing messages from queue.');
		}
	}
	
	/**
	 * Delete queue message
	 *
	 * @param string $queueName         					Queue name
	 * @param Microsoft_WindowsAzure_Storage_QueueMessage $message Message to delete from queue. A message retrieved using "peekMessages" can NOT be deleted!
	 * @throws Microsoft_WindowsAzure_Exception
	 */
	public function deleteMessage($queueName = '', Microsoft_WindowsAzure_Storage_QueueMessage $message)
	{
		if ($queueName === '') {
			throw new Microsoft_WindowsAzure_Exception('Queue name is not specified.');
		}
		if (!self::isValidQueueName($queueName)) {
		    throw new Microsoft_WindowsAzure_Exception('Queue name does not adhere to queue naming conventions. See http://msdn.microsoft.com/en-us/library/dd179349.aspx for more information.');
		}
		if ($message->PopReceipt == '') {
		    throw new Microsoft_WindowsAzure_Exception('A message retrieved using "peekMessages" can NOT be deleted! Use "getMessages" instead.');
		}

		// Perform request
		$response = $this->_performRequest($queueName . '/messages/' . $message->MessageId, array('popreceipt' => $message->PopReceipt), Microsoft_Http_Client::DELETE);	
		if (!$response->isSuccessful()) {
			throw new Microsoft_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
		}
	}
	
	/**
	 * Is valid queue name?
	 *
	 * @param string $queueName Queue name
	 * @return boolean
	 */
    public static function isValidQueueName($queueName = '')
    {
        if (preg_match("/^[a-z0-9][a-z0-9-]*$/", $queueName) === 0) {
            return false;
        }
    
        if (strpos($queueName, '--') !== false) {
            return false;
        }
    
        if (strtolower($queueName) != $queueName) {
            return false;
        }
    
        if (strlen($queueName) < 3 || strlen($queueName) > 63) {
            return false;
        }
            
        if (substr($queueName, -1) == '-') {
            return false;
        }
    
        return true;
    }
    
	/**
	 * 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;
		}
	}
}
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