public function assertNProcessRunning(QueueInterface &$queue, Processes &$processes = null)
{
$parallelProcesses = max(1, min($queue->count(), $this->maxNumberOfParallelProcesses));
if (null === $processes) {
$channelsEmpty = range(1, $parallelProcesses);
$processes = new Processes(array());
if (false !== $this->beforeCommand && null !== $this->beforeCommand) {
return $this->createProcessesForTheBeforeCommand($channelsEmpty, $processes);
}
} else {
$channelsEmpty = $processes->getIndexesOfCompletedChannel();
}
if (count($channelsEmpty) == 0) {
usleep(100);
return true;
}
foreach ($channelsEmpty as $currentChannel) {
if ($queue->isEmpty()) {
return false;
}
$currentProcessNumber = $this->getCurrentProcessCounter();
$this->incrementForThisChannel($currentChannel);
$process = $this->processFactory->createAProcess($queue->pop(), $currentChannel, $currentProcessNumber, $this->isFirstForThisChannel($currentChannel));
$processes->add($currentChannel, $process);
$processes->start($currentChannel);
}
return true;
}
