/// <summary>
/// Adds an <see cref="AdaptiveHealthModifier{T}"/> with <see cref="AdaptiveHealthWithoutDecay"/> and given <paramref name="tuningPolicy"/>.
/// </summary>
/// <param name="builder"></param>
/// <param name="tuningPolicy">A health tuning policy. See <see cref="IAdaptiveHealthTuningPolicy"/> and <see cref="TuningPolicies"/> for details.</param>
/// <param name="upMultiplier">A multiplier used to increase health. See <see cref="AdaptiveHealthWithoutDecay"/> for details.</param>
/// <param name="downMultiplier">A multiplier used to decrease health. See <see cref="AdaptiveHealthWithoutDecay"/> for details.</param>
/// <param name="minimumHealthValue">A minimum possible health value. See <see cref="AdaptiveHealthWithoutDecay"/> for details.</param>
public static void AddAdaptiveHealthModifierWithoutDecay(
this IWeighedReplicaOrderingBuilder builder,
IAdaptiveHealthTuningPolicy tuningPolicy,
double upMultiplier = ClusterClientDefaults.AdaptiveHealthUpMultiplier,
double downMultiplier = ClusterClientDefaults.AdaptiveHealthDownMultiplier,
double minimumHealthValue = ClusterClientDefaults.AdaptiveHealthMinimumValue) =>
builder.AddModifier(new AdaptiveHealthModifier <double>(new AdaptiveHealthWithoutDecay(upMultiplier, downMultiplier, minimumHealthValue), tuningPolicy, builder.Log));
/// <summary>
/// Adds an <see cref="AdaptiveHealthModifier{T}"/> with <see cref="AdaptiveHealthWithLinearDecay"/> and given <paramref name="tuningPolicy"/>.
/// </summary>
/// <param name="builder"></param>
/// <param name="tuningPolicy">A health tuning policy. See <see cref="IAdaptiveHealthTuningPolicy"/> and <see cref="TuningPolicies"/> for details.</param>
/// <param name="decayDuration">A duration of full health damage decay. See <see cref="AdaptiveHealthWithLinearDecay"/> for details.</param>
/// <param name="upMultiplier">A multiplier used to increase health. See <see cref="AdaptiveHealthWithLinearDecay"/> for details.</param>
/// <param name="downMultiplier">A multiplier used to decrease health. See <see cref="AdaptiveHealthWithLinearDecay"/> for details.</param>
/// <param name="minimumHealthValue">A minimum possible health value. See <see cref="AdaptiveHealthWithLinearDecay"/> for details.</param>
public static void AddAdaptiveHealthModifierWithLinearDecay(
this IWeighedReplicaOrderingBuilder builder,
IAdaptiveHealthTuningPolicy tuningPolicy,
TimeSpan decayDuration,
double upMultiplier = ClusterClientDefaults.AdaptiveHealthUpMultiplier,
double downMultiplier = ClusterClientDefaults.AdaptiveHealthDownMultiplier,
double minimumHealthValue = ClusterClientDefaults.AdaptiveHealthMinimumValue) =>
builder.AddModifier(new AdaptiveHealthModifier <HealthWithDecay>(new AdaptiveHealthWithLinearDecay(() => DateTime.UtcNow, decayDuration, upMultiplier, downMultiplier, minimumHealthValue), tuningPolicy, builder.Log));
public AdaptiveHealthModifier(IAdaptiveHealthImplementation <THealth> implementation, IAdaptiveHealthTuningPolicy tuningPolicy, ILog log)
{
this.implementation = implementation;
this.tuningPolicy = tuningPolicy;
this.log = log ?? new SilentLog();
storageKey = implementation.GetType().FullName;
}
public void SetUp()
{
replica1 = new Uri("http://replica1");
replica2 = new Uri("http://replica2");
replicas = new List <Uri> {
replica1, replica2
};
request = Request.Get("foo/bar");
storageProvider = Substitute.For <IReplicaStorageProvider>();
storageProvider.Obtain <int>(Arg.Any <string>()).Returns(storage = new ConcurrentDictionary <Uri, int>());
implementation = Substitute.For <IAdaptiveHealthImplementation <int> >();
tuningPolicy = Substitute.For <IAdaptiveHealthTuningPolicy>();
modifier = new AdaptiveHealthModifier <int>(implementation, tuningPolicy, log = new ConsoleLog());
}
public void Should_return_correct_action_based_on_constituents_decisions(AdaptiveHealthAction expected, params AdaptiveHealthAction[] actions)
{
var result = new ReplicaResult(new Uri("http://replica"), Responses.Timeout, ResponseVerdict.Accept, TimeSpan.Zero);
var policies = new IAdaptiveHealthTuningPolicy[actions.Length];
for (var i = 0; i < actions.Length; i++)
{
policies[i] = Substitute.For <IAdaptiveHealthTuningPolicy>();
policies[i].SelectAction(result).Returns(actions[i]);
}
var compositePolicy = new CompositeTuningPolicy(policies);
compositePolicy.SelectAction(result).Should().Be(expected);
}
