content: /**
   * 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.
   */
  package org.apache.aurora.scheduler.state;
  
  /**
   * The result of a task state change request.
   */
  public enum StateChangeResult {
    /**
     * Task is already in target state.
     */
    NOOP,
  
    /**
     * Task state has been changed successfully.
     */
    SUCCESS,
  
    /**
     * Change is illegal given the current task state.
     */
    ILLEGAL,
  
    /**
     * Same as {@link #ILLEGAL} but processing state change request generated some task side effects
     * (e.g.: a driver.kill() request has been placed).
     */
    ILLEGAL_WITH_SIDE_EFFECTS,
  
    /**
     * Change is not allowed due to the task not in CAS state.
     */
    INVALID_CAS_STATE
  }
  