content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.ugc.client;
  
  import com.google.gwt.http.client.RequestBuilder;
  import com.google.gwt.http.client.RequestCallback;
  
  /**
   * Helper class to execute an RPC call with a custom callback to enable/disable the wait animation.<p>
   */
  public class CmsRpcCallHelper {
  
      /** Counter to keep track of running requests. */
      private CmsRequestCounter m_requestCounter;
  
      /**
       * Creates a new instance.<p>
       *
       * @param counter the request counter to keep track of running requests
       */
      public CmsRpcCallHelper(CmsRequestCounter counter) {
  
          m_requestCounter = counter;
  
      }
  
      /**
       * Executes the RPC call.<p>
       *
       * @param requestBuilder the request builder returned by the service interface
       */
      @SuppressWarnings("synthetic-access")
      public void executeRpc(RequestBuilder requestBuilder) {
  
          final RequestCallback callback = requestBuilder.getCallback();
          RequestCallback callbackWrapper = new RequestCallback() {
  
              public void onError(com.google.gwt.http.client.Request request, Throwable exception) {
  
                  m_requestCounter.decrement();
                  callback.onError(request, exception);
              }
  
              public void onResponseReceived(
                  com.google.gwt.http.client.Request request,
                  com.google.gwt.http.client.Response response) {
  
                  m_requestCounter.decrement();
                  callback.onResponseReceived(request, response);
              }
          };
          requestBuilder.setCallback(callbackWrapper);
          m_requestCounter.increment();
          try {
              requestBuilder.send();
          } catch (Exception e) {
              m_requestCounter.decrement();
          }
      }
  
  }
  