Elasticsearch Transport client connection

I am building a Search Web Application with a servlet connected to Elasticsearch. I have a question about Elasticsearch 's shipping module . I am using TransportClient in a class implementing ServletContextListener to open a connection to Elasticsearch. Following is the code of ElasticsearchServletContextListener class.

public class ElasticsearchContextListener implements ServletContextListener {

  @Override
  public void contextInitialized(ServletContextEvent servletContextEvent) {
    System.out.println("Starting up!");

    try {
      Client client = TransportClient.builder().build().addTransportAddress(
          new InetSocketTransportAddress(InetAddress.getByName("IP-address"),9300));
    //Storing the client connection in a static variable
      Parameters.setESclient(client);

    } catch (UnknownHostException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }

  }

  @Override
  public void contextDestroyed(ServletContextEvent servletContextEvent) {
    Parameters.getESclient().close();
    System.out.println("Shutting down!");
  }
}

Now, whenever the user searches for a query, it uses the same "client" connection that was initialized in the ServletContextListener class. Can a client connection handle multiple requests at the same time? Or does each user need a separate client connection to query elasticsearch? thank you for your help.