/**
* @param Stream $stream
* @return PromiseInterface
*/
public function handleInit(Stream $stream)
{
$this->stream = $stream;
return new Promise(function (callable $fulfill, callable $reject) {
$this->stream->once('data', function ($data) use($fulfill, $reject) {
if (preg_match('/^ok\\b/i', $data)) {
$this->stream->on('data', [$this, 'handleData']);
$this->stream->on('error', [$this, 'handleError']);
call_user_func($fulfill);
} else {
call_user_func($reject, trim($data));
}
});
});
}
/**
* gracefully shutdown connection by flushing all remaining data and closing stream
*
* @param Stream $stream
*/
public function endConnection(Stream $stream)
{
$tid = true;
$loop = $this->loop;
// cancel below timer in case connection is closed in time
$stream->once('close', function () use(&$tid, $loop) {
// close event called before the timer was set up, so everything is okay
if ($tid === true) {
// make sure to not start a useless timer
$tid = false;
} else {
$loop->cancelTimer($tid);
}
});
// shut down connection by pausing input data, flushing outgoing buffer and then exit
$stream->pause();
$stream->end();
// check if connection is not already closed
if ($tid === true) {
// fall back to forcefully close connection in 3 seconds if buffer can not be flushed
$tid = $loop->addTimer(3.0, array($stream, 'close'));
}
}
$loop = LoopFactory::create();
$factory = new Factory($loop);
$client = $factory->createClient();
$out = new Stream(STDOUT, $loop);
$out->pause();
$stderr = new Stream(STDERR, $loop);
$stderr->pause();
// unkown exit code by default
$exit = 1;
$client->execCreate($container, $cmd)->then(function ($info) use($client, $out, $stderr, &$exit) {
$stream = $client->execStartStream($info['Id'], false, 'stderr');
$stream->pipe($out);
// forward custom stderr event to STDERR stream
$stream->on('stderr', function ($data) use($stderr, $stream) {
if ($stderr->write($data) === false) {
$stream->pause();
$stderr->once('drain', function () use($stream) {
$stream->resume();
});
}
});
$stream->on('error', 'printf');
// remember exit code of executed command once it closes
$stream->on('close', function () use($client, $info, &$exit) {
$client->execInspect($info['Id'])->then(function ($info) use(&$exit) {
$exit = $info['ExitCode'];
}, 'printf');
});
}, 'printf');
$loop->run();
exit($exit);