/**
* @param string $socketAddress
*
* @throws Exception\BindOrListenException
* @throws Exception\RuntimeException
*
* @return resource
*/
private static function startListening($socketAddress)
{
$lock = Lock::acquire();
if (self::$killSwitchPath !== null) {
$kswitch = new KillSwitch(self::$killSwitchPath);
if ($kswitch->getGlobal() || $kswitch->hasAddress($socketAddress)) {
throw new Exception\RuntimeException('This worker has been prevented from starting using the kill switch');
}
}
$socketFile = IdentificationHelper::getSocketFile($socketAddress);
if ($socketFile !== null) {
$socketDir = dirname($socketFile);
if (!is_dir($socketDir)) {
mkdir($socketDir, 0777, true);
}
}
$server = SocketFactory::createServerSocket($socketAddress, self::$socketContext);
$lock->release();
self::$socket = $server;
self::$listening = true;
self::$toDelete = $socketFile;
return $server;
}
/**
* @param callable $operation
*
* @throws Exception\LogicException
*
* @return mixed|$this
*/
private function transactKillSwitch(callable $operation)
{
$ksPath = $this->bootstrapProfile->getKillSwitchPath();
if ($ksPath === null) {
throw new Exception\LogicException('No kill switch has been configured');
}
$lock = Lock::acquire();
$kswitch = new KillSwitch($ksPath);
$retval = call_user_func($operation, $kswitch);
$kswitch->save();
$lock->release();
return $retval !== null ? $retval : $this;
}