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<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
//@require 'Swift/Transport/LoadBalancedTransport.php';
//@require 'Swift/Mime/Message.php';
/**
* Contains a list of redundant Transports so when one fails, the next is used.
* @package Swift
* @subpackage Transport
* @author Chris Corbyn
*/
class Swift_Transport_FailoverTransport
extends Swift_Transport_LoadBalancedTransport
{
/**
* Registered transport curently used.
* @var Swift_Transport
* @access private
*/
private $_currentTransport;
/**
* Creates a new FailoverTransport.
*/
public function __construct()
{
parent::__construct();
}
/**
* Send the given Message.
* Recipient/sender data will be retreived from the Message API.
* The return value is the number of recipients who were accepted for delivery.
* @param Swift_Mime_Message $message
* @param string[] &$failedRecipients to collect failures by-reference
* @return int
*/
public function send(Swift_Mime_Message $message, &$failedRecipients = null)
{
$maxTransports = count($this->_transports);
$sent = 0;
for ($i = 0; $i < $maxTransports
&& $transport = $this->_getNextTransport(); ++$i)
{
try
{
if (!$transport->isStarted())
{
$transport->start();
}
return $transport->send($message, $failedRecipients);
}
catch (Swift_TransportException $e)
{
$this->_killCurrentTransport();
}
}
if (count($this->_transports) == 0)
{
throw new Swift_TransportException(
'All Transports in FailoverTransport failed, or no Transports available'
);
}
return $sent;
}
// -- Protected methods
protected function _getNextTransport()
{
if (!isset($this->_currentTransport))
{
$this->_currentTransport = parent::_getNextTransport();
}
return $this->_currentTransport;
}
protected function _killCurrentTransport()
{
$this->_currentTransport = null;
parent::_killCurrentTransport();
}
}
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