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 *     following disclaimer in the documentation and/or other 
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using System.Collections.Generic;
using XenAdmin.Network;
using XenAPI;

namespace XenAdmin.Actions.HostActions
{
    public class VMsWhichCanBeMigratedAction : PureAsyncAction
    {
        private List<string> VmsRefsNotMigratable = new List<string>();
        public List<VM> MigratableVms = new List<VM>();

        public VMsWhichCanBeMigratedAction(IXenConnection connection, Host host)
            : base(connection, "vms which prevent evacuation", true)
        {
            Host = host;
        }

        protected override void Run()
        {
            Session session = Host.Connection.DuplicateSession();
            Dictionary<XenRef<XenAPI.VM>, string[]> dict = XenAPI.Host.get_vms_which_prevent_evacuation(session, Host.opaque_ref);

            foreach (KeyValuePair<XenRef<VM>, string[]> pair in dict)
            {
                if (pair.Value[0] == Failure.HOST_NOT_ENOUGH_FREE_MEMORY)
                    continue;

                if (!VmsRefsNotMigratable.Contains(pair.Key.opaque_ref))
                    VmsRefsNotMigratable.Add(pair.Key.opaque_ref);
            }

            foreach(VM vm in Connection.ResolveAll(Host.resident_VMs))
            {
                if (!vm.is_a_real_vm())
                    continue;

                if (VmsRefsNotMigratable.Contains(vm.opaque_ref))
                    continue;

                if (!MigratableVms.Contains(vm))
                    MigratableVms.Add(vm);
            }
        }
    }
}
