xenadmin/XenAdmin/Wizards/PatchingWizard/PlanActions/RestartHostPlanAction.cs

/* Copyright (c) Cloud Software Group, Inc. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

using System.Collections.Generic;
using XenAdmin.Core;
using XenAPI;


namespace XenAdmin.Wizards.PatchingWizard.PlanActions
{
    public class RestartHostPlanAction : RebootPlanAction
    {
        private readonly List<XenRef<VM>> _vms;
        public bool EnableOnly { get; set; }
        private readonly bool _restartAgentFallback;
        private List<string> hostsNeedReboot;

        public RestartHostPlanAction(Host host, List<XenRef<VM>> vms, bool enableOnly = false, bool restartAgentFallback = false, List<string> hostsThatWillRequireReboot = null)
            : base(host)
        {
            _vms = vms;
            EnableOnly = enableOnly;
            _restartAgentFallback = restartAgentFallback;
            hostsNeedReboot = hostsThatWillRequireReboot;
        }

        protected override void RunWithSession(ref Session session)
        {
            var hostObj = GetResolvedHost();
            if (hostObj == null)
                return;

            if (SkipRestartHost(hostObj))
            {
                if (_restartAgentFallback)
                    RestartAgent(ref session);

                if (!EnableOnly)
                    BringBabiesBack(ref session, _vms, EnableOnly);
                return;
            }

            EvacuateHost(ref session);
            RebootHost(ref session);
            BringBabiesBack(ref session, _vms, EnableOnly);

            if (hostsNeedReboot != null && hostsNeedReboot.Contains(hostObj.uuid))
                hostsNeedReboot.Remove(hostObj.uuid);
        }

        public bool SkipRestartHost(Host host)
        {
            // if the precheck didn't mark this host as requiring reboot, then skip the reboot
            if (Helpers.ElyOrGreater(host) && hostsNeedReboot != null && !hostsNeedReboot.Contains(host.uuid))
                return true;

            return false;
        }
    }
}