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<?php
/*
* This file is part of the Predis package.
*
* (c) 2009-2020 Daniele Alessandri
* (c) 2021-2023 Till Krüss
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Pipeline;
use Predis\ClientException;
use Predis\ClientInterface;
use Predis\Connection\ConnectionInterface;
use Predis\Connection\NodeConnectionInterface;
use Predis\Response\ErrorInterface as ErrorResponseInterface;
use Predis\Response\ResponseInterface;
use Predis\Response\ServerException;
use SplQueue;
/**
* Command pipeline wrapped into a MULTI / EXEC transaction.
*/
class Atomic extends Pipeline
{
/**
* {@inheritdoc}
*/
public function __construct(ClientInterface $client)
{
if (!$client->getCommandFactory()->supports('multi', 'exec', 'discard')) {
throw new ClientException(
"'MULTI', 'EXEC' and 'DISCARD' are not supported by the current command factory."
);
}
parent::__construct($client);
}
/**
* {@inheritdoc}
*/
protected function getConnection()
{
$connection = $this->getClient()->getConnection();
if (!$connection instanceof NodeConnectionInterface) {
$class = __CLASS__;
throw new ClientException("The class '$class' does not support aggregate connections.");
}
return $connection;
}
/**
* {@inheritdoc}
*/
protected function executePipeline(ConnectionInterface $connection, SplQueue $commands)
{
$commandFactory = $this->getClient()->getCommandFactory();
$connection->executeCommand($commandFactory->create('multi'));
foreach ($commands as $command) {
$connection->writeRequest($command);
}
foreach ($commands as $command) {
$response = $connection->readResponse($command);
if ($response instanceof ErrorResponseInterface) {
$connection->executeCommand($commandFactory->create('discard'));
throw new ServerException($response->getMessage());
}
}
$executed = $connection->executeCommand($commandFactory->create('exec'));
if (!isset($executed)) {
throw new ClientException(
'The underlying transaction has been aborted by the server.'
);
}
if (count($executed) !== count($commands)) {
$expected = count($commands);
$received = count($executed);
throw new ClientException(
"Invalid number of responses [expected $expected, received $received]."
);
}
$responses = [];
$sizeOfPipe = count($commands);
$exceptions = $this->throwServerExceptions();
for ($i = 0; $i < $sizeOfPipe; ++$i) {
$command = $commands->dequeue();
$response = $executed[$i];
if (!$response instanceof ResponseInterface) {
$responses[] = $command->parseResponse($response);
} elseif ($response instanceof ErrorResponseInterface && $exceptions) {
$this->exception($connection, $response);
} else {
$responses[] = $response;
}
unset($executed[$i]);
}
return $responses;
}
}
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