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CA-384191: Fix missing values for min VM restrictions

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- Min and max should also include the defaults when looking across all templates
- Ensure exception isn't hit unnecessarily when parsing restriction value for VMs
- Allow use of `GetRestrictionValueFromMatchingTemplate` with template objects
- Parallelize `GetRestrictionValueAcrossTemplates` call

Signed-off-by: Danilo Del Busso <danilo.delbusso@cloud.com>
This commit is contained in:
Danilo Del Busso 2023-10-24 11:44:49 +01:00 committed by Konstantina Chremmou
parent afb419af04
commit 14a3539f28
1 changed files with 16 additions and 3 deletions
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19
XenModel/XenAPI-Extensions/VM.cs
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@ -260,7 +260,10 @@ namespace XenAPI
/// <returns>The value if found. If not found, null is returned instead</returns>
private static T? GetRestrictionValueFromMatchingTemplate<T>(VM vm, string field, string attribute) where T : struct
{
if (!vm.is_a_template && !string.IsNullOrEmpty(vm.reference_label))
if(vm.is_a_template)
return GetRestrictionValue<T>(vm, field, attribute);
if (!string.IsNullOrEmpty(vm.reference_label))
{
var matchingTemplate = vm.Connection.Cache.VMs
.FirstOrDefault(v => v.is_a_template && v.reference_label == vm.reference_label);
@ -288,6 +291,13 @@ namespace XenAPI
var xn = xd?.SelectSingleNode($@"restrictions/restriction[@field='{field}']");
var resultString = xn?.Attributes?[attribute]?.Value;
T? result = null;
// avoid the expensive operation of throwing an exception
if (string.IsNullOrEmpty(resultString))
{
return null;
}
try
{
var converter = TypeDescriptor.GetConverter(typeof(T));
@ -320,6 +330,7 @@ namespace XenAPI
private static List<T> GetRestrictionValueAcrossTemplates<T>(IXenObject vm, string field, string attribute) where T : struct
{
return vm.Connection.Cache.VMs
.AsParallel()
.Where(v => v.is_a_template)
.Select(v => GetRestrictionValue<T>(v, field, attribute))
.Where(value => value != null)
@ -343,7 +354,8 @@ namespace XenAPI
return (T) value;
var templateValues = GetRestrictionValueAcrossTemplates<T>(vm, field, "max");
return templateValues.Count == 0 ? defaultValue : templateValues.Max();
templateValues.Add(defaultValue);
return templateValues.Max();
}
/// <summary>
@ -362,7 +374,8 @@ namespace XenAPI
return (T)value;
var templateValues = GetRestrictionValueAcrossTemplates<T>(vm, field, "min");
return templateValues.Count == 0 ? defaultValue : templateValues.Min();
templateValues.Add(defaultValue);
return templateValues.Min();
}
/// <summary>