/*.................................................................................................................*/
 public HttpClient getHttpClient() {
   // from http://www.artima.com/forums/flat.jsp?forum=121&thread=357685
   CredentialsProvider provider = new BasicCredentialsProvider();
   UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(username, password);
   provider.setCredentials(AuthScope.ANY, credentials);
   return HttpClientBuilder.create().setDefaultCredentialsProvider(provider).build();
 }
    @Override
    public void process(final HttpRequest request, final HttpContext context) {
      AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);

      // If no auth scheme avaialble yet, try to initialize it
      // preemptively
      if (authState.getAuthScheme() == null) {
        AuthScheme authScheme = (AuthScheme) context.getAttribute("preemptive-auth");
        if (authScheme != null) {
          CredentialsProvider credsProvider =
              (CredentialsProvider) context.getAttribute(ClientContext.CREDS_PROVIDER);
          HttpHost targetHost = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
          Credentials creds =
              credsProvider.getCredentials(
                  new AuthScope(targetHost.getHostName(), targetHost.getPort()));
          if (creds == null) {
            throw new RuntimeException("No credentials for preemptive authentication");
          }
          authState.setAuthScheme(authScheme);
          authState.setCredentials(creds);
        }
      }
    }