private void Start()
{
this.Stash.UnstashAll();
this.Receive <ClusterMetricsChanged>(clusterMetrics => this.lastClusterMetrics = clusterMetrics);
this.Receive <StartMetricsUpdate>(_ => this.Become(this.MetricsQueryObjectShardRegion));
this.Receive <RequestStateCommand>(_ => this.RespondState(_.ReplyTo));
Context.System.Scheduler.ScheduleTellOnce(this.interval, this.Self, new StartMetricsUpdate(), this.Self);
this.LogClusterMetrics();
}
public void MetricsChanged(ClusterMetricsChanged @event)
{
var oldValue = _weightedRouteesRef.Value;
var routees = oldValue.Item1;
var weightedRoutees = new WeightedRoutees(routees,
_cluster.SelfAddress,
_metricsSelector.Weights(@event.NodeMetrics).ToImmutableDictionary(pair => pair.Key, pair => pair.Value));
// retry when CAS failure
if (!_weightedRouteesRef.CompareAndSet(oldValue, Tuple.Create(routees, @event.NodeMetrics, weightedRoutees.AsOption())))
{
MetricsChanged(@event);
}
}
/// <summary>
/// Handles
/// </summary>
/// <param name="change"></param>
private void AppendMetricsChange(ClusterMetricsChanged change)
{
ClusterMetrics = change.NodeMetrics;
MetricsHistory = MetricsHistory.Add(change.NodeMetrics);
}