public Result <Uri> Execute(IEnumerable <IReadonlyMicroserviceInstance> instances)
{
if (instances == null || !instances.Any())
{
return(Result <Uri> .Failure(Messages.CanNotExecuteLoadBalancingStrategyForZeroAvailableInstances()));
}
IInstanceMetric bestMetric = new ActiveConnectionMetric(double.MaxValue);
IReadonlyMicroserviceInstance bestInstance = null;
foreach (var instance in instances)
{
if (TryGetActiveConnectionMetric(instance, out var metric))
{
if (bestMetric.CompareTo(metric) >= 0)
{
bestMetric = metric;
bestInstance = instance;
}
}
}
return(bestInstance == null ?
Result <Uri> .Failure(Messages.CanNotFindSuitableTarget(instances)) :
Result <Uri> .Success(bestInstance.Uri));
}
public void Compare_to_should_return_positive_value_if_less_connection_than_another(double anotherActiveConnections)
{
// Arrange
var anotherMetric = new ActiveConnectionMetric(anotherActiveConnections);
var expectedResult = GetExpectedResult(anotherActiveConnections);
// Act
var result = _sut.CompareTo(anotherMetric);
// Assert
Assert.Equal(expectedResult, result);
}
public ActiveConnectionMetricTests()
{
_sut = new ActiveConnectionMetric(ActiveConnections);
}
