xenadmin/XenModel/Actions/GetDataSourcesAction.cs

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using System.Linq;
using System.Collections.Generic;
using XenAdmin.Network;
using XenAPI;

namespace XenAdmin.Actions
{
    public class GetDataSourcesAction : AsyncAction
    {
        public readonly List<Data_source> DataSources = new List<Data_source>();
        public readonly IXenObject IXenObject;

        public GetDataSourcesAction(IXenConnection connection, IXenObject xmo)
            : base(connection, Messages.ACTION_GET_DATASOURCES, Messages.ACTION_GETTING_DATASOURCES, true)
        {
            IXenObject = xmo;
        }

        protected override void Run()
        {
            List<Data_source> sources;

            Host host = IXenObject as Host;
            VM vm = IXenObject as VM;
            if (vm != null)
            {
                sources = XenAPI.VM.get_data_sources(Session, vm.opaque_ref);
            }
            else if (host != null)
            {
                sources = XenAPI.Host.get_data_sources(Session, host.opaque_ref);
            }
            else
            {
                return;
            }
            DataSources.AddRange(sources);
            // add custom datasources

            //CA-89512: We are provided the Avg CPU for server >= Tampa - otherwise work it out for ourselves
            if(!DataSources.Any(d=>d.name_label=="cpu_avg"))
            {
                Data_source avg_cpu_source = new Data_source("avg_cpu", "", true, false, "percentage", 0d, double.MaxValue, 0d);
                DataSources.Add(avg_cpu_source);
            }
        }
    }
}