content: package act.handler.builtin.controller;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2019 ActFramework
   * %%
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * #L%
   */
  
  import act.Act;
  import act.util.SimpleProgressGauge;
  
  /**
   * Used for track async request handler method progress
   */
  public class ControllerProgressGauge extends SimpleProgressGauge {
  
      @Override
      public void fail(String error) {
          this.error = error;
          // do not trigger update event yet
      }
  
      @Override
      public void stepBy(int steps) {
          currentSteps += steps;
          if (!isDone()) {
              triggerUpdateEvent();
          }
      }
  
      @Override
      public void stepTo(int steps) {
          if (currentSteps != steps) {
              currentSteps = steps;
              if (!isDone()) {
                  triggerUpdateEvent();
              }
          }
      }
  
      public void commitFinalState() {
          if (null == this.error) {
              markAsDone();
          }
          triggerUpdateEvent(true);
      }
  }
  