public IMetricsCollector Build(ActorSystem system)
{
var log = Logging.GetLogger(system, GetType());
var settings = ClusterMetricsSettings.Create(system.Settings.Config);
var collectorCustom = settings.CollectorProvider;
var defaultCollector = typeof(DefaultCollector).AssemblyQualifiedName;
var useCustom = !settings.CollectorFallback;
var useInternal = settings.CollectorFallback && string.IsNullOrEmpty(settings.CollectorProvider);
Try <IMetricsCollector> Create(string provider)
{
log.Debug("Trying {0}", provider);
return(DynamicAccess.CreateInstanceFor <IMetricsCollector>(provider, system));
}
Try <IMetricsCollector> collector;
if (useCustom)
{
collector = Create(collectorCustom);
}
else if (useInternal)
{
collector = Create(defaultCollector);
}
else // Use complete fall back chain.
{
collector = Create(collectorCustom).OrElse(Create(defaultCollector));
}
return(collector.Recover(ex => throw new ConfigurationException($"Could not create metrics collector: {ex}")).Get());
}
/// <summary>
/// Creates new <see cref="ClusterMetrics"/> for given actor system
/// </summary>
/// <param name="system"></param>
internal ClusterMetrics(ExtendedActorSystem system)
{
_system = system;
_system.Settings.InjectTopLevelFallback(DefaultConfig());
Settings = ClusterMetricsSettings.Create(_system.Settings.Config);
Supervisor = _system.SystemActorOf(
Props.Create <ClusterMetricsSupervisor>().WithDispatcher(Settings.MetricsDispatcher).WithDeploy(Deploy.Local),
Settings.SupervisorName);
}
public void Should_be_able_to_parse_settings()
{
var config = Sys.Settings.Config.WithFallback(
ConfigurationFactory.FromResource <ClusterMetricsSettings>("Akka.Cluster.Metrics.reference.conf"));
var settings = new ClusterMetricsSettings(config);
// Extension.
settings.MetricsDispatcher.ShouldBe(Dispatchers.DefaultDispatcherId);
settings.PeriodicTasksInitialDelay.Should().Be(1.Seconds());
// Supervisor.
settings.SupervisorName.Should().Be("cluster-metrics");
settings.SupervisorStrategyProvider.Should().BeEquivalentTo(typeof(ClusterMetricsStrategy).TypeQualifiedName());
settings.SupervisorStrategyConfiguration.ToString().ShouldBeEquivalentTo(
ConfigurationFactory.ParseString("loggingEnabled=true,withinTimeRange=3s,maxNrOfRetries=3").ToString());
// Collector.
settings.CollectorEnabled.Should().BeTrue();
settings.CollectorProvider.Should().BeEmpty();
settings.CollectorSampleInterval.Should().Be(3.Seconds());
settings.CollectorGossipInterval.Should().Be(3.Seconds());
settings.CollectorMovingAverageHalfLife.Should().Be(12.Seconds());
}
private AdaptiveLoadBalancingRouterSpec(AdaptiveLoadBalancingRouterConfig config)
: base(config, typeof(AdaptiveLoadBalancingRouterSpec))
{
_config = config;
_metricsSettings = ClusterMetricsSettings.Create(Cluster.System.Settings.Config);
}
