# Base Akka.NET cluster configuration for OtOpcUa fused-host nodes.
#
# Roles, seed nodes, public hostname/port, and the actor system name are overlaid
# at runtime by AkkaHostedService — see ZB.MOM.WW.OtOpcUa.Cluster/AkkaHostedService.cs.
# Everything else here is the cluster-wide tuning that should match across nodes.
#
# Tuning sourced from ScadaLink (ScadaLink.Host/Actors/AkkaHostedService.BuildHocon);
# any divergence must be deliberate and recorded in docs/v2/Architecture.md.

akka {
    extensions = [
        "Akka.Cluster.Tools.PublishSubscribe.DistributedPubSubExtensionProvider, Akka.Cluster.Tools"
    ]

    actor {
        provider = cluster
    }

    remote {
        dot-netty.tcp {
            hostname = "0.0.0.0"
            port = 4053
        }
        transport-failure-detector {
            heartbeat-interval = 2s
            acceptable-heartbeat-pause = 10s
        }
    }

    cluster {
        seed-nodes = []
        roles = []
        min-nr-of-members = 1

        split-brain-resolver {
            active-strategy = "keep-oldest"
            stable-after = 15s
            keep-oldest {
                down-if-alone = on
            }
        }

        failure-detector {
            heartbeat-interval = 2s
            threshold = 10.0
            acceptable-heartbeat-pause = 10s
        }

        down-removal-margin = 15s
        run-coordinated-shutdown-when-down = on

        singleton {
            singleton-name = "singleton"
        }
        singleton-proxy {
            singleton-identification-interval = 1s
        }
    }

    coordinated-shutdown {
        run-by-clr-shutdown-hook = on
        default-phase-timeout = 30s
    }
}

# Pinned dispatcher used by OpcUaPublishActor (Task 44) so the OPC UA SDK sees
# only one thread per actor instance — its session/subscription locks expect
# strict single-threaded access.
opcua-synchronized-dispatcher {
    type = "PinnedDispatcher"
    executor = "thread-pool-executor"
    throughput = 1
}