code: protected void initNode() {
          /**
           * quick fix for integration tests. if hosts property set to "embedded" then a local node is start.
           * maven dependencies need to be defined correctly for this to work
           */
          ClassLoader cl = Thread.currentThread().getContextClassLoader();
  
          try {
              // Need to use the classloader for Elasticsearch to pick up the property files when
              // running in an OSGi environment
              Thread.currentThread().setContextClassLoader(TransportClient.class.getClassLoader());
  
              final Properties properties = new Properties();
              try {
                  InputStream stream = null;
  
                  if (System.getProperties().containsKey("jboss.server.config.dir")) {
                      File file = new File(System.getProperty("jboss.server.config.dir") + File.separatorChar +
                              HAWKULAR_ELASTICSEARCH_PROPERTIES);
                      stream = new FileInputStream(file);
                  } else {
                      stream = this.getClass().getResourceAsStream(File.separatorChar +
                                      HAWKULAR_ELASTICSEARCH_PROPERTIES);
                  }
                  properties.load(stream);
                  stream.close();
              } catch (IOException e) {
                  log.log(Level.SEVERE, "Failed to load elasticsearch properties", e);
              }
  
              node = NodeBuilder.nodeBuilder()
                      .settings(ImmutableSettings.settingsBuilder()
                              .put(properties)).node();
  
              node.start();
              client = node.client();
          } finally {
              Thread.currentThread().setContextClassLoader(cl);
          }
  
          if (log.isLoggable(Level.FINEST)) {
              log.finest("Initialized Elasticsearch node=" + node + " client=" + client);
          }
      }
docs: This method initializes the node.