content: 
  /*
   * Copyright Contributors to the OpenCue Project
   *
   * 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 com.imageworks.spcue.dao;
  
  import com.imageworks.spcue.MaintenanceTask;
  
  /**
   * the MaintenanceDao is for queries to run at a specific intervals
   *
   * @category DAO
   */
  public interface MaintenanceDao {
  
      /**
       * Set hosts to the down state that have not pinged in within 5 minutes and return the number
       * hosts that failed the check.
       *
       * @return int
       */
      int setUpHostsToDown();
  
      /**
       * Lock specified task
       *
       * @param task
       * @return
       */
      boolean lockTask(MaintenanceTask task);
  
      /**
       * Locks a test for the specified number of minutes. No other thread will execute this task,
       * even if the task is unlocked for N amount of time.
       *
       * @param task
       * @param minutes
       * @return
       */
      public boolean lockTask(MaintenanceTask task, int minutes);
  
      /**
       * Unlock specified task
       *
       * @param task
       */
      void unlockTask(MaintenanceTask task);
  
  }
  