<?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.
*/
/**
* Contains a list of redundant Transports so when one fails, the next is used.
*
* @author Chris Corbyn
*/
class Swift_Transport_FailoverTransport extends Swift_Transport_LoadBalancedTransport
{
/**
* Registered transport currently used.
*
* @var Swift_Transport
*/
private $currentTransport;
// needed as __construct is called from elsewhere explicitly
public function __construct()
{
parent::__construct();
}
/**
* {@inheritdoc}
*/
public function ping()
{
$maxTransports = \count($this->transports);
for ($i = 0; $i < $maxTransports
&& $transport = $this->getNextTransport(); ++$i) {
if ($transport->ping()) {
return true;
} else {
$this->killCurrentTransport();
}
}
return \count($this->transports) > 0;
}
/**
* Send the given Message.
*
* Recipient/sender data will be retrieved from the Message API.
* The return value is the number of recipients who were accepted for delivery.
*
* @param string[] $failedRecipients An array of failures by-reference
*
* @return int
*/
public function send(Swift_Mime_SimpleMessage $message, &$failedRecipients = null)
{
$maxTransports = \count($this->transports);
$sent = 0;
$this->lastUsedTransport = null;
for ($i = 0; $i < $maxTransports
&& $transport = $this->getNextTransport(); ++$i) {
try {
if (!$transport->isStarted()) {
$transport->start();
}
if ($sent = $transport->send($message, $failedRecipients)) {
$this->lastUsedTransport = $transport;
return $sent;
}
} catch (Swift_TransportException $e) {
$this->killCurrentTransport();
}
}
if (0 == \count($this->transports)) {
throw new Swift_TransportException('All Transports in FailoverTransport failed, or no Transports available');
}
return $sent;
}
protected function getNextTransport()
{
if (!isset($this->currentTransport)) {
$this->currentTransport = parent::getNextTransport();
}
return $this->currentTransport;
}
protected function killCurrentTransport()
{
$this->currentTransport = null;
parent::killCurrentTransport();
}
}