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<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Util;
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use Composer\Util\HttpDownloader;
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use React\Promise\Promise;
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use Symfony\Component\Console\Helper\ProgressBar;
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/**
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* @author Jordi Boggiano <j.boggiano@seld.be>
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*/
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class Loop
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{
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private $httpDownloader;
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private $processExecutor;
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private $currentPromises;
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public function __construct(HttpDownloader $httpDownloader = null, ProcessExecutor $processExecutor = null)
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{
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$this->httpDownloader = $httpDownloader;
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if ($this->httpDownloader) {
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$this->httpDownloader->enableAsync();
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}
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$this->processExecutor = $processExecutor;
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if ($this->processExecutor) {
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$this->processExecutor->enableAsync();
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}
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}
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public function wait(array $promises, ProgressBar $progress = null)
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{
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/** @var \Exception|null */
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$uncaught = null;
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\React\Promise\all($promises)->then(
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function () { },
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function ($e) use (&$uncaught) {
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$uncaught = $e;
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}
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);
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$this->currentPromises = $promises;
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if ($progress) {
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$totalJobs = 0;
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if ($this->httpDownloader) {
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$totalJobs += $this->httpDownloader->countActiveJobs();
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}
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if ($this->processExecutor) {
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$totalJobs += $this->processExecutor->countActiveJobs();
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}
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$progress->start($totalJobs);
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}
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while (true) {
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$activeJobs = 0;
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if ($this->httpDownloader) {
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$activeJobs += $this->httpDownloader->countActiveJobs();
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}
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if ($this->processExecutor) {
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$activeJobs += $this->processExecutor->countActiveJobs();
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}
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if ($progress) {
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$progress->setProgress($progress->getMaxSteps() - $activeJobs);
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}
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if (!$activeJobs) {
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break;
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}
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usleep(5000);
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}
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$this->currentPromises = null;
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if ($uncaught) {
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throw $uncaught;
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}
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}
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public function abortJobs()
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{
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if ($this->currentPromises) {
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foreach ($this->currentPromises as $promise) {
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$promise->cancel();
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}
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}
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}
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}
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