@Test
  public void testLocalNodeUsingExt() throws BackendException, InterruptedException {

    String baseDir = Joiner.on(File.separator).join("target", "es", "jvmlocal_ext");

    assertFalse(new File(baseDir + File.separator + "data").exists());

    CommonsConfiguration cc = new CommonsConfiguration(new BaseConfiguration());
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.node.data", "true");
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.node.client", "false");
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.node.local", "true");
    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.ext.path.data", baseDir + File.separator + "data");
    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.ext.path.work", baseDir + File.separator + "work");
    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.ext.path.logs", baseDir + File.separator + "logs");
    ModifiableConfiguration config =
        new ModifiableConfiguration(
            GraphDatabaseConfiguration.ROOT_NS, cc, BasicConfiguration.Restriction.NONE);
    config.set(INTERFACE, ElasticSearchSetup.NODE.toString(), INDEX_NAME);
    Configuration indexConfig = config.restrictTo(INDEX_NAME);
    IndexProvider idx = new ElasticSearchIndex(indexConfig);
    simpleWriteAndQuery(idx);
    idx.close();

    assertTrue(new File(baseDir + File.separator + "data").exists());
  }
  @Test
  public void testIndexCreationOptions() throws InterruptedException, BackendException {
    final int shards = 77;

    ElasticsearchRunner esr = new ElasticsearchRunner(".", "indexCreationOptions.yml");
    esr.start();
    CommonsConfiguration cc = new CommonsConfiguration(new BaseConfiguration());
    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.create.ext.number_of_shards",
        String.valueOf(shards));
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.cluster.name", "indexCreationOptions");
    ModifiableConfiguration config =
        new ModifiableConfiguration(
            GraphDatabaseConfiguration.ROOT_NS, cc, BasicConfiguration.Restriction.NONE);
    config.set(INTERFACE, ElasticSearchSetup.NODE.toString(), INDEX_NAME);
    Configuration indexConfig = config.restrictTo(INDEX_NAME);
    IndexProvider idx = new ElasticSearchIndex(indexConfig);
    simpleWriteAndQuery(idx);

    ImmutableSettings.Builder settingsBuilder = ImmutableSettings.settingsBuilder();
    settingsBuilder.put("discovery.zen.ping.multicast.enabled", "false");
    settingsBuilder.put("discovery.zen.ping.unicast.hosts", "localhost,127.0.0.1:9300");
    settingsBuilder.put("cluster.name", "indexCreationOptions");
    NodeBuilder nodeBuilder = NodeBuilder.nodeBuilder().settings(settingsBuilder.build());
    nodeBuilder.client(true).data(false).local(false);
    Node n = nodeBuilder.build().start();

    GetSettingsResponse response =
        n.client()
            .admin()
            .indices()
            .getSettings(new GetSettingsRequest().indices("titan"))
            .actionGet();
    assertEquals(String.valueOf(shards), response.getSetting("titan", "index.number_of_shards"));

    idx.close();
    n.stop();
    esr.stop();
  }
  @Test
  public void testNetworkNodeUsingExt() throws BackendException, InterruptedException {
    ElasticsearchRunner esr = new ElasticsearchRunner(".", "networkNodeUsingExt.yml");
    esr.start();
    CommonsConfiguration cc = new CommonsConfiguration(new BaseConfiguration());
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.node.data", "false");
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.node.client", "true");
    cc.set("index." + INDEX_NAME + ".elasticsearch.ext.cluster.name", "networkNodeUsingExt");
    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.ext.discovery.zen.ping.multicast.enabled", "false");
    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.ext.discovery.zen.ping.unicast.hosts",
        "localhost,127.0.0.1:9300");
    ModifiableConfiguration config =
        new ModifiableConfiguration(
            GraphDatabaseConfiguration.ROOT_NS, cc, BasicConfiguration.Restriction.NONE);
    config.set(INTERFACE, ElasticSearchSetup.NODE.toString(), INDEX_NAME);
    Configuration indexConfig = config.restrictTo(INDEX_NAME);
    IndexProvider idx = new ElasticSearchIndex(indexConfig);
    simpleWriteAndQuery(idx);
    idx.close();

    cc.set(
        "index." + INDEX_NAME + ".elasticsearch.ext.discovery.zen.ping.unicast.hosts",
        "10.11.12.13");
    config =
        new ModifiableConfiguration(
            GraphDatabaseConfiguration.ROOT_NS, cc, BasicConfiguration.Restriction.NONE);
    config.set(INTERFACE, ElasticSearchSetup.NODE.toString(), INDEX_NAME);
    config.set(HEALTH_REQUEST_TIMEOUT, "5s", INDEX_NAME);
    indexConfig = config.restrictTo(INDEX_NAME);

    Throwable failure = null;
    try {
      idx = new ElasticSearchIndex(indexConfig);
    } catch (Throwable t) {
      failure = t;
    }
    // idx.close();
    Assert.assertNotNull("ES client failed to throw exception on connection failure", failure);
    esr.stop();
  }