Joseph Doherty
26 lines
1.2 KiB
C#
26 lines
1.2 KiB
C#
using ZB.MOM.WW.ScadaBridge.Commons.Messages.Health;
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namespace ZB.MOM.WW.ScadaBridge.HealthMonitoring;
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/// <summary>
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/// Provides cluster node status information for health reporting.
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/// Implemented by the Host project which has access to the Akka.NET actor system.
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/// </summary>
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public interface IClusterNodeProvider
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{
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/// <summary>Returns the current status of all cluster nodes for the provider's role scope.</summary>
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/// <returns>A read-only list of node status records for all known cluster nodes.</returns>
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IReadOnlyList<NodeStatus> GetClusterNodes();
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/// <summary>
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/// True when this node is currently the oldest Up member for the provider's
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/// role scope — the node the ClusterSingletonManager hosts singletons on.
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/// This is the canonical product "active node" check (review 01): the site
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/// event-log purge gate, the central self-report loop, and (via plan 02) the
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/// S&F delivery gate all consume it. It is deliberately NOT the cluster
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/// leader — leadership is address-ordered and diverges from singleton
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/// placement once the original first node restarts and rejoins.
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/// </summary>
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bool SelfIsPrimary { get; }
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}
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