content: //
  // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you 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.cloud.resource.hypervisor;
  
  import com.cloud.agent.api.RebootAnswer;
  import com.cloud.agent.api.RebootCommand;
  import com.cloud.agent.api.StartAnswer;
  import com.cloud.agent.api.StartCommand;
  import com.cloud.agent.api.StopAnswer;
  import com.cloud.agent.api.StopCommand;
  import com.cloud.resource.ServerResource;
  
  /**
   * HypervisorResource specifies all of the commands a hypervisor agent needs
   *
   */
  public interface HypervisorResource extends ServerResource {
      /**
       * Starts a VM.  All information regarding the VM
       * are carried within the command.
       * @param cmd carries all the information necessary to start a VM
       * @return Start2Answer answer.
       */
      StartAnswer execute(StartCommand cmd);
  
      /**
       * Stops a VM.  Must return true as long as the VM does not exist.
       * @param cmd information necessary to identify the VM to stop.
       * @return StopAnswer
       */
      StopAnswer execute(StopCommand cmd);
  
      /**
       * Reboots a VM.
       * @param cmd information necessary to identify the VM to reboot.
       * @return RebootAnswer
       */
      RebootAnswer execute(RebootCommand cmd);
  }
  