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ParallelFileProcessor.php
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ParallelFileProcessor.php
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<?php
declare(strict_types=1);
namespace Rector\Parallel\Application;
use Clue\React\NDJson\Decoder;
use Clue\React\NDJson\Encoder;
use Nette\Utils\Random;
use React\EventLoop\StreamSelectLoop;
use React\Socket\ConnectionInterface;
use React\Socket\TcpServer;
use Rector\Core\Configuration\Option;
use Rector\Core\Console\Command\ProcessCommand;
use Rector\Core\ValueObject\Error\SystemError;
use Rector\Core\ValueObject\Reporting\FileDiff;
use Rector\Parallel\Command\WorkerCommandLineFactory;
use Rector\Parallel\ValueObject\Bridge;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symplify\EasyParallel\Contract\SerializableInterface;
use Symplify\EasyParallel\Enum\Action;
use Symplify\EasyParallel\Enum\Content;
use Symplify\EasyParallel\Enum\ReactCommand;
use Symplify\EasyParallel\Enum\ReactEvent;
use Symplify\EasyParallel\ValueObject\ParallelProcess;
use Symplify\EasyParallel\ValueObject\ProcessPool;
use Symplify\EasyParallel\ValueObject\Schedule;
use Symplify\PackageBuilder\Parameter\ParameterProvider;
use Throwable;
/**
* Inspired from @see
* https://github.com/phpstan/phpstan-src/commit/9124c66dcc55a222e21b1717ba5f60771f7dda92#diff-39c7a3b0cbb217bbfff96fbb454e6e5e60c74cf92fbb0f9d246b8bebbaad2bb0
*
* https://github.com/phpstan/phpstan-src/commit/b84acd2e3eadf66189a64fdbc6dd18ff76323f67#diff-7f625777f1ce5384046df08abffd6c911cfbb1cfc8fcb2bdeaf78f337689e3e2R150
*/
final class ParallelFileProcessor
{
/**
* @var int
*/
private const SYSTEM_ERROR_LIMIT = 50;
private ProcessPool|null $processPool = null;
public function __construct(
private readonly WorkerCommandLineFactory $workerCommandLineFactory,
private readonly ParameterProvider $parameterProvider
) {
}
/**
* @param callable(int $stepCount): void $postFileCallback Used for progress bar jump
* @return array{file_diffs: SerializableInterface[], system_errors: SerializableInterface[], system_errors_count: int}
*/
public function process(
Schedule $schedule,
string $mainScript,
callable $postFileCallback,
InputInterface $input
): array {
$jobs = array_reverse($schedule->getJobs());
$streamSelectLoop = new StreamSelectLoop();
// basic properties setup
$numberOfProcesses = $schedule->getNumberOfProcesses();
// initial counters
$fileDiffs = [];
/** @var SystemError[] $systemErrors */
$systemErrors = [];
$tcpServer = new TcpServer('127.0.0.1:0', $streamSelectLoop);
$this->processPool = new ProcessPool($tcpServer);
$tcpServer->on(ReactEvent::CONNECTION, function (ConnectionInterface $connection) use (&$jobs): void {
$inDecoder = new Decoder($connection, true, 512, 0, 4 * 1024 * 1024);
$outEncoder = new Encoder($connection);
$inDecoder->on(ReactEvent::DATA, function (array $data) use (&$jobs, $inDecoder, $outEncoder): void {
$action = $data[ReactCommand::ACTION];
if ($action !== Action::HELLO) {
return;
}
$processIdentifier = $data[Option::PARALLEL_IDENTIFIER];
$parallelProcess = $this->processPool->getProcess($processIdentifier);
$parallelProcess->bindConnection($inDecoder, $outEncoder);
if ($jobs === []) {
$this->processPool->quitProcess($processIdentifier);
return;
}
$job = array_pop($jobs);
$parallelProcess->request([
ReactCommand::ACTION => Action::MAIN,
Content::FILES => $job,
]);
});
});
/** @var string $serverAddress */
$serverAddress = $tcpServer->getAddress();
/** @var int $serverPort */
$serverPort = parse_url($serverAddress, PHP_URL_PORT);
$systemErrorsCount = 0;
$reachedSystemErrorsCountLimit = false;
$handleErrorCallable = function (Throwable $throwable) use (
&$systemErrors,
&$systemErrorsCount,
&$reachedSystemErrorsCountLimit
): void {
$systemErrors[] = new SystemError(
$throwable->getMessage(),
$throwable->getFile(),
$throwable->getLine(),
);
++$systemErrorsCount;
$reachedSystemErrorsCountLimit = true;
$this->processPool->quitAll();
};
$timeoutInSeconds = $this->parameterProvider->provideIntParameter(Option::PARALLEL_TIMEOUT_IN_SECONDS);
for ($i = 0; $i < $numberOfProcesses; ++$i) {
// nothing else to process, stop now
if ($jobs === []) {
break;
}
$processIdentifier = Random::generate();
$workerCommandLine = $this->workerCommandLineFactory->create(
$mainScript,
ProcessCommand::class,
'worker',
$input,
$processIdentifier,
$serverPort,
);
$parallelProcess = new ParallelProcess($workerCommandLine, $streamSelectLoop, $timeoutInSeconds);
$parallelProcess->start(
// 1. callable on data
function (array $json) use (
$parallelProcess,
&$systemErrors,
&$fileDiffs,
&$jobs,
$postFileCallback,
&$systemErrorsCount,
&$reachedInternalErrorsCountLimit,
$processIdentifier
): void {
// decode arrays to objects
foreach ($json[Bridge::SYSTEM_ERRORS] as $jsonError) {
if (is_string($jsonError)) {
$systemErrors[] = new SystemError('System error: ' . $jsonError);
continue;
}
$systemErrors[] = SystemError::decode($jsonError);
}
foreach ($json[Bridge::FILE_DIFFS] as $jsonError) {
$fileDiffs[] = FileDiff::decode($jsonError);
}
$postFileCallback($json[Bridge::FILES_COUNT]);
$systemErrorsCount += $json[Bridge::SYSTEM_ERRORS_COUNT];
if ($systemErrorsCount >= self::SYSTEM_ERROR_LIMIT) {
$reachedInternalErrorsCountLimit = true;
$this->processPool->quitAll();
}
if ($jobs === []) {
$this->processPool->quitProcess($processIdentifier);
return;
}
$job = array_pop($jobs);
$parallelProcess->request([
ReactCommand::ACTION => Action::MAIN,
Content::FILES => $job,
]);
},
// 2. callable on error
$handleErrorCallable,
// 3. callable on exit
function ($exitCode, string $stdErr) use (&$systemErrors, $processIdentifier): void {
$this->processPool->tryQuitProcess($processIdentifier);
if ($exitCode === Command::SUCCESS) {
return;
}
if ($exitCode === null) {
return;
}
$systemErrors[] = new SystemError('Child process error: ' . $stdErr);
}
);
$this->processPool->attachProcess($processIdentifier, $parallelProcess);
}
$streamSelectLoop->run();
if ($reachedSystemErrorsCountLimit) {
$systemErrors[] = new SystemError(sprintf(
'Reached system errors count limit of %d, exiting...',
self::SYSTEM_ERROR_LIMIT
));
}
return [
Bridge::FILE_DIFFS => $fileDiffs,
Bridge::SYSTEM_ERRORS => $systemErrors,
Bridge::SYSTEM_ERRORS_COUNT => count($systemErrors),
];
}
}