public static void main(String[] args) {
    try {
      final long processStart = System.nanoTime();
      final String startMessage = "Build process started. Classpath: " + System.getProperty("java.class.path");
      System.out.println(startMessage);
      LOG.info("==================================================");
      LOG.info(startMessage);

      final String host = args[HOST_ARG];
      final int port = Integer.parseInt(args[PORT_ARG]);
      final UUID sessionId = UUID.fromString(args[SESSION_ID_ARG]);
      final File systemDir = new File(FileUtilRt.toCanonicalPath(args[SYSTEM_DIR_ARG], File.separatorChar, true));
      Utils.setSystemRoot(systemDir);

      final long connectStart = System.nanoTime();
      // IDEA-123132, let's try again
      for (int attempt = 0; ; attempt++) {
        try {
          ourEventLoopGroup = new NioEventLoopGroup(1, (ThreadFactory)r -> new Thread(r, "JPS event loop"));
          break;
        }
        catch (IllegalStateException e) {
          if (attempt == 2) {
            printErrorAndExit(host, port, e);
            return;
          }
          else {
            LOG.warn("Cannot create event loop, attempt #" + attempt, e);
            TimeoutUtil.sleep(10L * (attempt + 1));
          }
        }
      }

      final Bootstrap bootstrap = new Bootstrap().group(ourEventLoopGroup).channel(NioSocketChannel.class).handler(new ChannelInitializer<>() {
        @Override
        protected void initChannel(Channel channel) {
          channel.pipeline().addLast(new ProtobufVarint32FrameDecoder(),
                                     new ProtobufDecoder(CmdlineRemoteProto.Message.getDefaultInstance()),
                                     new ProtobufVarint32LengthFieldPrepender(),
                                     new ProtobufEncoder(),
                                     new MyMessageHandler(sessionId));
        }
      }).option(ChannelOption.TCP_NODELAY, true).option(ChannelOption.SO_KEEPALIVE, true);

      final ChannelFuture future = bootstrap.connect(new InetSocketAddress(host, port)).awaitUninterruptibly();


      final boolean success = future.isSuccess();
      if (success) {
        LOG.info("Connection to IDE established in " + TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - connectStart) + " ms");

        final String projectPathToPreload = System.getProperty(PRELOAD_PROJECT_PATH, null);
        final String globalsPathToPreload = System.getProperty(PRELOAD_CONFIG_PATH, null);
        if (projectPathToPreload != null && globalsPathToPreload != null) {
          final PreloadedData data = new PreloadedData();
          ourPreloadedData = data;
          try {
            final BuildRunner runner = new BuildRunner(new JpsModelLoaderImpl(projectPathToPreload, globalsPathToPreload, false, null));
            data.setRunner(runner);

            final File dataStorageRoot = Utils.getDataStorageRoot(projectPathToPreload);
            final BuildFSState fsState = new BuildFSState(false);
            final ProjectDescriptor pd = runner.load(new MessageHandler() {
              @Override
              public void processMessage(BuildMessage msg) {
                data.addMessage(msg);
              }
            }, dataStorageRoot, fsState);
            data.setProjectDescriptor(pd);

            final File fsStateFile = new File(dataStorageRoot, BuildSession.FS_STATE_FILE);
            try (DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(fsStateFile)))) {
              final int version = in.readInt();
              if (version == BuildFSState.VERSION) {
                final long savedOrdinal = in.readLong();
                final boolean hasWorkToDo = in.readBoolean();
                fsState.load(in, pd.getModel(), pd.getBuildRootIndex());
                data.setFsEventOrdinal(savedOrdinal);
                data.setHasHasWorkToDo(hasWorkToDo);
              }
            }
            catch (FileNotFoundException ignored) {
            }
            catch (IOException e) {
              LOG.info("Error pre-loading FS state", e);
              fsState.clearAll();
            }

            // preloading target configurations and pre-calculating target dirty state
            final BuildTargetsState targetsState = pd.getTargetsState();
            for (BuildTarget<?> target : pd.getBuildTargetIndex().getAllTargets()) {
              targetsState.getTargetConfiguration(target).isTargetDirty(pd);
            }

            //noinspection ResultOfMethodCallIgnored
            BuilderRegistry.getInstance();

            JpsServiceManager.getInstance().getExtensions(PreloadedDataExtension.class).forEach(ext-> ext.preloadData(data));

            LOG.info("Pre-loaded process ready in " + TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - processStart) + " ms");
          }
          catch (Throwable e) {
            LOG.info("Failed to pre-load project " + projectPathToPreload, e);
            // failed to preload the project; the situation will be handled later, when real build starts
          }
        }
        else if (projectPathToPreload != null || globalsPathToPreload != null){
          LOG.info("Skipping project pre-loading step: both paths to project configuration files and path to global settings must be specified");
        }
        future.channel().writeAndFlush(CmdlineProtoUtil.toMessage(sessionId, CmdlineProtoUtil.createParamRequest()));
      }
      else {
        printErrorAndExit(host, port, future.cause());
      }
    }
    catch (Throwable e) {
      LOG.error(e);
      throw e;
    }
  }
public static void main(String[] args)