/// <summary>
/// TBD
/// </summary>
/// <param name="node">TBD</param>
/// <exception cref="InvalidOperationException">
/// This exception is thrown when a non-leader tries to down the specified <paramref name="node"/>.
/// </exception>
public override void Down(Address node)
{
if (!_leader)
{
throw new InvalidOperationException("Must be leader to down node");
}
_cluster.LogInfo("Leader is auto-downing unreachable node [{0}]", node);
_cluster.Down(node);
}
protected override void PreStart()
{
_cluster.Subscribe(Self, new [] { typeof(ClusterEvent.IMemberEvent), typeof(ClusterEvent.ReachabilityEvent) });
_cluster.LogInfo("Metrics collection has started successfully.");
}
public EventBusListener(Cluster cluster, ClusterReadView readView)
{
_cluster = cluster;
_readView = readView;
Receive <ClusterEvent.IClusterDomainEvent>(clusterDomainEvent =>
{
clusterDomainEvent.Match()
.With <ClusterEvent.SeenChanged>(changed =>
{
State = State.Copy(seenBy: changed.SeenBy);
})
.With <ClusterEvent.ReachabilityChanged>(changed =>
{
_readView._reachability = changed.Reachability;
})
.With <ClusterEvent.MemberRemoved>(removed =>
{
State = State.Copy(members: State.Members.Remove(removed.Member),
unreachable: State.Unreachable.Remove(removed.Member));
})
.With <ClusterEvent.UnreachableMember>(member =>
{
// replace current member with new member (might have different status, only address is used in == comparison)
State = State.Copy(unreachable: State.Unreachable.Remove(member.Member).Add(member.Member));
})
.With <ClusterEvent.ReachableMember>(member =>
{
State = State.Copy(unreachable: State.Unreachable.Remove(member.Member));
})
.With <ClusterEvent.IMemberEvent>(memberEvent =>
{
var newUnreachable = State.Unreachable;
// replace current member with new member (might have different status, only address is used in == comparison)
if (State.Unreachable.Contains(memberEvent.Member))
{
newUnreachable = State.Unreachable.Remove(memberEvent.Member).Add(memberEvent.Member);
}
State = State.Copy(
members: State.Members.Remove(memberEvent.Member).Add(memberEvent.Member),
unreachable: newUnreachable);
})
.With <ClusterEvent.LeaderChanged>(changed =>
{
State = State.Copy(leader: changed.Leader);
})
.With <ClusterEvent.RoleLeaderChanged>(changed =>
{
State = State.Copy(roleLeaderMap: State.RoleLeaderMap.SetItem(changed.Role, changed.Leader));
})
.With <ClusterEvent.CurrentInternalStats>(stats =>
{
readView._latestStats = stats;
})
.With <ClusterEvent.ClusterShuttingDown>(_ => { });
// once captured, optional verbose logging of event
if (!(clusterDomainEvent is ClusterEvent.SeenChanged) && _cluster.Settings.LogInfoVerbose)
{
_cluster.LogInfo("event {0}", clusterDomainEvent.GetType().Name);
}
});
Receive <ClusterEvent.CurrentClusterState>(state =>
{
State = state;
});
}
