/** {@inheritDoc} */
  @Override
  public void start() throws IgniteCheckedException {
    IpcSharedMemoryNativeLoader.load(log);

    pid = IpcSharedMemoryUtils.pid();

    if (pid == -1) throw new IpcEndpointBindException("Failed to get PID of the current process.");

    if (size <= 0) throw new IpcEndpointBindException("Space size should be positive: " + size);

    String tokDirPath = this.tokDirPath;

    if (F.isEmpty(tokDirPath)) throw new IpcEndpointBindException("Token directory path is empty.");

    tokDirPath = tokDirPath + '/' + locNodeId.toString() + '-' + IpcSharedMemoryUtils.pid();

    tokDir = U.resolveWorkDirectory(tokDirPath, false);

    if (port <= 0 || port >= 0xffff)
      throw new IpcEndpointBindException("Port value is illegal: " + port);

    try {
      srvSock = new ServerSocket();

      // Always bind to loopback.
      srvSock.bind(new InetSocketAddress("127.0.0.1", port));
    } catch (IOException e) {
      // Although empty socket constructor never throws exception, close it just in case.
      U.closeQuiet(srvSock);

      throw new IpcEndpointBindException(
          "Failed to bind shared memory IPC endpoint (is port already " + "in use?): " + port, e);
    }

    gcWorker = new GcWorker(gridName, "ipc-shmem-gc", log);

    new IgniteThread(gcWorker).start();

    if (log.isInfoEnabled())
      log.info(
          "IPC shared memory server endpoint started [port="
              + port
              + ", tokDir="
              + tokDir.getAbsolutePath()
              + ']');
  }
 public String UUID() {
   UUID id = UUID.randomUUID();
   return id.toString();
 }