private static boolean checkPort(final InetSocketAddress remoteAddress) {
final ClientBootstrap bootstrap =
new ClientBootstrap(new OioClientSocketChannelFactory(new PooledThreadExecutor()));
bootstrap.setOption("child.tcpNoDelay", true);
final AtomicBoolean result = new AtomicBoolean(false);
final Semaphore semaphore = new Semaphore();
semaphore.down(); // must call to down() here to ensure that down was called _before_ up()
bootstrap.setPipeline(
pipeline(
new HttpResponseDecoder(),
new HttpRequestEncoder(),
new SimpleChannelUpstreamHandler() {
@Override
public void messageReceived(ChannelHandlerContext context, MessageEvent e)
throws Exception {
try {
if (e.getMessage() instanceof HttpResponse) {
HttpResponse response = (HttpResponse) e.getMessage();
if (response.getStatus().equals(OK)
&& response
.getContent()
.toString(CharsetUtil.US_ASCII)
.equals(getApplicationStartTime())) {
LOG.info("port check: current OS must be marked as normal");
result.set(true);
}
}
} finally {
semaphore.up();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
throws Exception {
try {
LOG.error(e.getCause());
} finally {
semaphore.up();
}
}
}));
ChannelFuture connectFuture = null;
try {
connectFuture = bootstrap.connect(remoteAddress);
if (!waitComplete(connectFuture, "connect")) {
return false;
}
ChannelFuture writeFuture =
connectFuture
.getChannel()
.write(new DefaultHttpRequest(HTTP_1_1, HttpMethod.GET, START_TIME_PATH));
if (!waitComplete(writeFuture, "write")) {
return false;
}
try {
// yes, 30 seconds. I always get timeout in Linux in Parallels if I set to 2 seconds.
// In any case all work is done in pooled thread (IDE init time isn't affected)
if (!semaphore.waitForUnsafe(30000)) {
LOG.info("port check: semaphore down timeout");
}
} catch (InterruptedException e) {
LOG.info("port check: semaphore interrupted", e);
}
} finally {
if (connectFuture != null) {
connectFuture.getChannel().close().awaitUninterruptibly();
}
bootstrap.releaseExternalResources();
}
return result.get();
}
private void await() throws InterruptedException {
semaphore.waitForUnsafe();
if (fail.get()) {
fail();
}
}