/**
* Get bucket / content hash
*
* @param string $topic
* @param string $channel
* @param MessageInterface $msg
*
* @return array index, content, seen (boolean), mcKey
*/
private function hash($topic, $channel, MessageInterface $msg)
{
$element = "{$topic}:{$channel}:" . $msg->getPayload();
$hash = hash('adler32', $element, TRUE);
list(, $val) = unpack('N', $hash);
$index = $val % $this->size;
$content = md5($element);
$mcKey = "nsqphp:{$this->size}:{$index}";
$storedContentHash = $this->memcached->get($mcKey);
$seen = $storedContentHash && $storedContentHash === $content;
return array('index' => $index, 'content' => $content, 'seen' => $seen, 'mcKey' => $mcKey);
}
/**
* Get bucket / content hash
*
* @param string $topic
* @param string $channel
* @param MessageInterface $msg
*
* @return array index, content, seen (boolean)
*/
private function hash($topic, $channel, MessageInterface $msg)
{
$element = "{$topic}:{$channel}:" . $msg->getPayload();
$hash = hash('adler32', $element, TRUE);
list(, $val) = unpack('N', $hash);
$index = $val % $this->size;
$content = md5($element);
$seen = isset($this->map[$index]) && $this->map[$index] === $content;
return array('index' => $index, 'content' => $content, 'seen' => $seen);
}
/**
* Publish message
*
* @param string $topic A valid topic name: [.a-zA-Z0-9_-] and 1 < length < 32
* @param MessageInterface $msg
*
* @throws Exception\PublishException If we don't get "OK" back from server
* (for the specified number of hosts - as directed by `publishTo`)
*
* @return nsqphp This instance for call chaining
*/
public function publish($topic, MessageInterface $msg)
{
// pick a random
$this->pubConnectionPool->shuffle();
$success = 0;
$errors = array();
foreach ($this->pubConnectionPool as $conn) {
/** @var $conn ConnectionInterface */
try {
$this->tryFunc(function (ConnectionInterface $conn) use($topic, $msg, &$success, &$errors) {
$conn->write($this->writer->publish($topic, $msg->getPayload()));
$frame = $this->reader->readFrame($conn);
while ($this->reader->frameIsHeartbeat($frame)) {
$conn->write($this->writer->nop());
$frame = $this->reader->readFrame($conn);
}
if ($this->reader->frameIsResponse($frame, 'OK')) {
$success++;
} else {
$errors[] = $frame['error'];
}
}, $conn, 2);
} catch (\Exception $e) {
$errors[] = $e->getMessage();
}
if ($success >= $this->pubSuccessCount) {
break;
}
}
if ($success < $this->pubSuccessCount) {
throw new Exception\PublishException(sprintf('Failed to publish message; required %s for success, achieved %s. Errors were: %s', $this->pubSuccessCount, $success, implode(', ', $errors)));
}
return $this;
}
/**
* Test if should requeue and with what delay
*
* The message will contain how many attempts had been made _before_ we
* made our attempt (which must have failed).
*
* @param MessageInterface $msg
*
* @return integer|NULL The number of milliseconds to delay for, if we
* want to retry, or NULL to drop it on the floor
*/
public function shouldRequeue(MessageInterface $msg)
{
$attempts = $msg->getAttempts();
return $attempts < $this->maxAttempts ? $this->delay : NULL;
}
/**
* {@inheritDoc}
*/
public function shouldRequeue(MessageInterface $msg)
{
$attempts = $msg->getAttempts();
$delay = isset($this->delays[$attempts - 1]) ? $this->delays[$attempts - 1] : $this->delays[count($this->delays) - 1];
return $attempts < $this->maxAttempts ? $delay : NULL;
}
