/**
   * Load grid configuration for specified node type.
   *
   * @param type Node type to load configuration for.
   * @return Grid configuration for specified node type.
   */
  static IgniteConfiguration getConfig(String type) {
    String path = NODE_CFG.get(type);

    if (path == null) throw new IllegalArgumentException("Unsupported node type: " + type);

    URL url = U.resolveIgniteUrl(path);

    BeanFactory ctx = new FileSystemXmlApplicationContext(url.toString());

    return (IgniteConfiguration) ctx.getBean("grid.cfg");
  }
  /**
   * Sets configuration properties from the map.
   *
   * @param endpointCfg Map of properties.
   * @throws IgniteCheckedException If invalid property name or value.
   */
  public void setupConfiguration(Map<String, String> endpointCfg) throws IgniteCheckedException {
    for (Map.Entry<String, String> e : endpointCfg.entrySet()) {
      try {
        switch (e.getKey()) {
          case "type":
          case "host":
          case "management":
            // Ignore these properties
            break;

          case "port":
            setPort(Integer.parseInt(e.getValue()));
            break;

          case "size":
            setSize(Integer.parseInt(e.getValue()));
            break;

          case "tokenDirectoryPath":
            setTokenDirectoryPath(e.getValue());
            break;

          default:
            throw new IgniteCheckedException(
                "Invalid property '" + e.getKey() + "' of " + getClass().getSimpleName());
        }
      } catch (Throwable t) {
        if (t instanceof IgniteCheckedException || t instanceof Error) throw t;

        throw new IgniteCheckedException(
            "Invalid value '"
                + e.getValue()
                + "' of the property '"
                + e.getKey()
                + "' in "
                + getClass().getSimpleName(),
            t);
      }
    }
  }
  /**
   * Example for start/stop node tasks.
   *
   * @param args Not used.
   */
  public static void main(String[] args) {
    String nodeType = "tcp+ssl";

    // Start initial node = 1
    try (Ignite g = G.start(NODE_CFG.get(nodeType))) {
      // Change topology.
      changeTopology(g, 4, 1, nodeType);
      changeTopology(g, 1, 4, nodeType);

      // Stop node by id = 0
      g.compute().execute(ClientStopNodeTask.class, g.cluster().localNode().id().toString());

      // Wait for node stops.
      // U.sleep(1000);

      assert G.allGrids().isEmpty();
    } catch (Exception e) {
      System.err.println("Uncaught exception: " + e.getMessage());

      e.printStackTrace(System.err);
    }
  }