forked from akkadotnet/akka.net
/
ClusterDaemon.cs
3170 lines (2849 loc) · 124 KB
/
ClusterDaemon.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//-----------------------------------------------------------------------
// <copyright file="ClusterDaemon.cs" company="Akka.NET Project">
// Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
// Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
// </copyright>
//-----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Threading.Tasks;
using Akka.Actor;
using Akka.Dispatch;
using Akka.Event;
using Akka.Remote;
using Akka.Util;
using Akka.Util.Internal;
using Akka.Util.Internal.Collections;
using static Akka.Cluster.MembershipState;
namespace Akka.Cluster
{
/// <summary>
/// Base interface for all cluster messages. All ClusterMessage's are serializable.
/// </summary>
public interface IClusterMessage
{
}
/// <summary>
/// Cluster commands sent by the USER via <see cref="Cluster"/> extension.
/// </summary>
internal class ClusterUserAction
{
/// <summary>
/// TBD
/// </summary>
internal abstract class BaseClusterUserAction
{
/// <summary>
/// TBD
/// </summary>
/// <param name="address">TBD</param>
protected BaseClusterUserAction(Address address)
{
Address = address;
}
/// <summary>
/// TBD
/// </summary>
public Address Address { get; }
/// <summary>
/// TBD
/// </summary>
/// <param name="other">TBD</param>
/// <returns>TBD</returns>
protected bool Equals(BaseClusterUserAction other)
{
return Equals(Address, other.Address);
}
/// <inheritdoc/>
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
if (obj.GetType() != this.GetType()) return false;
return Equals((BaseClusterUserAction)obj);
}
/// <inheritdoc/>
public override int GetHashCode()
{
return (Address != null ? Address.GetHashCode() : 0);
}
}
/// <summary>
/// Command to initiate join another node (represented by `address`).
/// Join will be sent to the other node.
/// </summary>
internal sealed class JoinTo : BaseClusterUserAction
{
/// <summary>
/// TBD
/// </summary>
/// <param name="address">TBD</param>
public JoinTo(Address address)
: base(address)
{
}
}
/// <summary>
/// Command to leave the cluster.
/// </summary>
internal sealed class Leave : BaseClusterUserAction, IClusterMessage
{
/// <summary>
/// TBD
/// </summary>
/// <param name="address">TBD</param>
public Leave(Address address)
: base(address)
{ }
}
/// <summary>
/// Command to mark node as temporary down.
/// </summary>
internal sealed class Down : BaseClusterUserAction, IClusterMessage
{
/// <summary>
/// TBD
/// </summary>
/// <param name="address">TBD</param>
public Down(Address address)
: base(address)
{
}
}
}
/// <summary>
/// Command to join the cluster. Sent when a node wants to join another node (the receiver).
/// </summary>
internal sealed class InternalClusterAction
{
/// <summary>
/// TBD
/// </summary>
internal sealed class Join : IClusterMessage
{
private readonly UniqueAddress _node;
private readonly ImmutableHashSet<string> _roles;
/// <summary>
/// TBD
/// </summary>
/// <param name="node">the node that wants to join the cluster</param>
/// <param name="roles">TBD</param>
/// <param name="appVersion">Application version</param>
public Join(UniqueAddress node, ImmutableHashSet<string> roles, AppVersion appVersion)
{
_node = node;
_roles = roles;
AppVersion = appVersion ?? Util.AppVersion.Zero;
}
/// <summary>
/// TBD
/// </summary>
public UniqueAddress Node { get { return _node; } }
/// <summary>
/// TBD
/// </summary>
public ImmutableHashSet<string> Roles { get { return _roles; } }
public AppVersion AppVersion { get; }
/// <inheritdoc/>
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
return obj is Join && Equals((Join)obj);
}
private bool Equals(Join other)
{
return _node.Equals(other._node) && !_roles.Except(other._roles).Any() && AppVersion.Equals(other.AppVersion);
}
/// <inheritdoc/>
public override int GetHashCode()
{
unchecked
{
return (_node.GetHashCode() * 397) ^ _roles.GetHashCode();
}
}
/// <inheritdoc/>
public override string ToString()
{
var roles = string.Join(",", Roles ?? ImmutableHashSet<string>.Empty);
return $"{GetType()}: {Node} wants to join on Roles [{roles}]";
}
}
/// <summary>
/// Reply to Join
/// </summary>
internal sealed class Welcome : IClusterMessage
{
private readonly UniqueAddress _from;
private readonly Gossip _gossip;
/// <summary>
/// TBD
/// </summary>
/// <param name="from">the sender node in the cluster, i.e. the node that received the Join command</param>
/// <param name="gossip">TBD</param>
public Welcome(UniqueAddress from, Gossip gossip)
{
_from = from;
_gossip = gossip;
}
/// <summary>
/// TBD
/// </summary>
public UniqueAddress From { get { return _from; } }
/// <summary>
/// TBD
/// </summary>
public Gossip Gossip { get { return _gossip; } }
/// <inheritdoc/>
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
return obj is Welcome && Equals((Welcome)obj);
}
private bool Equals(Welcome other)
{
return _from.Equals(other._from) && _gossip.ToString().Equals(other._gossip.ToString());
}
/// <inheritdoc/>
public override int GetHashCode()
{
unchecked
{
return (_from.GetHashCode() * 397) ^ _gossip.GetHashCode();
}
}
}
/// <summary>
/// Command to initiate the process to join the specified
/// seed nodes.
/// </summary>
internal sealed class JoinSeedNodes : IDeadLetterSuppression
{
private readonly ImmutableList<Address> _seedNodes;
/// <summary>
/// Creates a new instance of the command.
/// </summary>
/// <param name="seedNodes">The list of seeds we wish to join.</param>
public JoinSeedNodes(ImmutableList<Address> seedNodes)
{
_seedNodes = seedNodes;
}
/// <summary>
/// The list of seeds we wish to join.
/// </summary>
public ImmutableList<Address> SeedNodes
{
get { return _seedNodes; }
}
}
/// <summary>
/// Start message of the process to join one of the seed nodes.
/// The node sends <see cref="InitJoin"/> to all seed nodes, which replies
/// with <see cref="InitJoinAck"/>. The first reply is used others are discarded.
/// The node sends <see cref="Join"/> command to the seed node that replied first.
/// If a node is uninitialized it will reply to `InitJoin` with
/// <see cref="InitJoinNack"/>.
/// </summary>
internal class JoinSeenNode
{
}
/// <inheritdoc cref="JoinSeenNode"/>
internal class InitJoin : IClusterMessage, IDeadLetterSuppression
{
/// <inheritdoc/>
public override bool Equals(object obj)
{
return obj is InitJoin;
}
}
/// <inheritdoc cref="JoinSeenNode"/>
internal sealed class InitJoinAck : IClusterMessage, IDeadLetterSuppression
{
private readonly Address _address;
/// <summary>
/// TBD
/// </summary>
/// <param name="address">TBD</param>
/// <returns>TBD</returns>
public InitJoinAck(Address address)
{
_address = address;
}
/// <summary>
/// TBD
/// </summary>
public Address Address
{
get { return _address; }
}
/// <inheritdoc/>
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
return obj is InitJoinAck && Equals((InitJoinAck)obj);
}
private bool Equals(InitJoinAck other)
{
return Equals(_address, other._address);
}
/// <inheritdoc/>
public override int GetHashCode()
{
return (_address != null ? _address.GetHashCode() : 0);
}
}
/// <inheritdoc cref="JoinSeenNode"/>
internal sealed class InitJoinNack : IClusterMessage, IDeadLetterSuppression
{
private readonly Address _address;
/// <summary>
/// TBD
/// </summary>
/// <param name="address">The address we attempted to join</param>
public InitJoinNack(Address address)
{
_address = address;
}
/// <summary>
/// TBD
/// </summary>
public Address Address
{
get { return _address; }
}
/// <inheritdoc/>
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
return obj is InitJoinNack && Equals((InitJoinNack)obj);
}
private bool Equals(InitJoinNack other)
{
return Equals(_address, other._address);
}
/// <inheritdoc/>
public override int GetHashCode()
{
return (_address != null ? _address.GetHashCode() : 0);
}
}
/// <summary>
/// Signals that a member is confirmed to be exiting the cluster
/// </summary>
internal sealed class ExitingConfirmed : IClusterMessage, IDeadLetterSuppression
{
public ExitingConfirmed(UniqueAddress address)
{
Address = address;
}
/// <summary>
/// The member's address
/// </summary>
public UniqueAddress Address { get; }
private bool Equals(ExitingConfirmed other)
{
return Address.Equals(other.Address);
}
/// <inheritdoc/>
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
return obj is ExitingConfirmed && Equals((ExitingConfirmed)obj);
}
/// <inheritdoc/>
public override int GetHashCode()
{
return Address.GetHashCode();
}
}
/// <summary>
/// Used to signal that a self-exiting event has completed.
/// </summary>
internal sealed class ExitingCompleted
{
private ExitingCompleted() { }
/// <summary>
/// Singleton instance
/// </summary>
public static readonly ExitingCompleted Instance = new ExitingCompleted();
}
/// <summary>
/// Marker interface for periodic tick messages
/// </summary>
internal interface ITick { }
/// <summary>
/// Used to trigger the publication of gossip
/// </summary>
internal class GossipTick : ITick
{
private GossipTick() { }
private static readonly GossipTick _instance = new GossipTick();
/// <summary>
/// TBD
/// </summary>
public static GossipTick Instance
{
get
{
return _instance;
}
}
}
/// <summary>
/// TBD
/// </summary>
internal class GossipSpeedupTick : ITick
{
private GossipSpeedupTick() { }
private static readonly GossipSpeedupTick _instance = new GossipSpeedupTick();
/// <summary>
/// TBD
/// </summary>
public static GossipSpeedupTick Instance
{
get
{
return _instance;
}
}
}
/// <summary>
/// TBD
/// </summary>
internal class ReapUnreachableTick : ITick
{
private ReapUnreachableTick() { }
private static readonly ReapUnreachableTick _instance = new ReapUnreachableTick();
/// <summary>
/// TBD
/// </summary>
public static ReapUnreachableTick Instance
{
get
{
return _instance;
}
}
}
/// <summary>
/// TBD
/// </summary>
internal class MetricsTick : ITick
{
private MetricsTick() { }
private static readonly MetricsTick _instance = new MetricsTick();
/// <summary>
/// TBD
/// </summary>
public static MetricsTick Instance
{
get
{
return _instance;
}
}
}
/// <summary>
/// TBD
/// </summary>
internal class LeaderActionsTick : ITick
{
private LeaderActionsTick() { }
private static readonly LeaderActionsTick _instance = new LeaderActionsTick();
/// <summary>
/// TBD
/// </summary>
public static LeaderActionsTick Instance
{
get
{
return _instance;
}
}
}
/// <summary>
/// TBD
/// </summary>
internal class PublishStatsTick : ITick
{
private PublishStatsTick() { }
private static readonly PublishStatsTick _instance = new PublishStatsTick();
/// <summary>
/// TBD
/// </summary>
public static PublishStatsTick Instance
{
get
{
return _instance;
}
}
}
/// <summary>
/// TBD
/// </summary>
internal sealed class SendGossipTo
{
private readonly Address _address;
/// <summary>
/// TBD
/// </summary>
/// <param name="address">TBD</param>
public SendGossipTo(Address address)
{
_address = address;
}
/// <summary>
/// TBD
/// </summary>
public Address Address { get { return _address; } }
/// <inheritdoc/>
public override bool Equals(object obj)
{
var other = obj as SendGossipTo;
if (other == null) return false;
return _address.Equals(other._address);
}
/// <inheritdoc/>
public override int GetHashCode()
{
return _address.GetHashCode();
}
}
/// <summary>
/// Gets a reference to the cluster core daemon.
/// </summary>
internal class GetClusterCoreRef: INoSerializationVerificationNeeded
{
public GetClusterCoreRef(Cluster cluster)
{
Cluster = cluster;
}
public Cluster Cluster { get; }
}
/// <summary>
/// Command to <see cref="Akka.Cluster.ClusterDaemon"/> to create a
/// <see cref="OnMemberStatusChangedListener"/> that will be invoked
/// when the current member is marked as up.
/// </summary>
public sealed class AddOnMemberUpListener : INoSerializationVerificationNeeded
{
/// <summary>
/// TBD
/// </summary>
/// <param name="callback">TBD</param>
public AddOnMemberUpListener(Action callback)
{
Callback = callback;
}
/// <summary>
/// TBD
/// </summary>
public Action Callback { get; }
}
/// <summary>
/// Command to the <see cref="ClusterDaemon"/> to create a <see cref="OnMemberStatusChangedListener"/>
/// that will be invoked when the current member is removed.
/// </summary>
public sealed class AddOnMemberRemovedListener : INoSerializationVerificationNeeded
{
/// <summary>
/// TBD
/// </summary>
/// <param name="callback">TBD</param>
public AddOnMemberRemovedListener(Action callback)
{
Callback = callback;
}
/// <summary>
/// TBD
/// </summary>
public Action Callback { get; }
}
/// <summary>
/// All messages related to creating or removing <see cref="Cluster"/> event subscriptions
/// </summary>
public interface ISubscriptionMessage { }
/// <summary>
/// Subscribe an actor to new <see cref="Cluster"/> events.
/// </summary>
public sealed class Subscribe : ISubscriptionMessage
{
private readonly IActorRef _subscriber;
private readonly ClusterEvent.SubscriptionInitialStateMode _initialStateMode;
private readonly ImmutableHashSet<Type> _to;
/// <summary>
/// Creates a new subscription
/// </summary>
/// <param name="subscriber">The actor being subscribed to events.</param>
/// <param name="initialStateMode">The initial state of the subscription.</param>
/// <param name="to">The range of event types to which we'll be subscribing.</param>
public Subscribe(IActorRef subscriber, ClusterEvent.SubscriptionInitialStateMode initialStateMode,
ImmutableHashSet<Type> to)
{
_subscriber = subscriber;
_initialStateMode = initialStateMode;
_to = to;
}
/// <summary>
/// The actor that is subscribed to cluster events.
/// </summary>
public IActorRef Subscriber
{
get { return _subscriber; }
}
/// <summary>
/// The delivery mechanism for the initial cluster state.
/// </summary>
public ClusterEvent.SubscriptionInitialStateMode InitialStateMode
{
get { return _initialStateMode; }
}
/// <summary>
/// The range of cluster events to which <see cref="Subscriber"/> is subscribed.
/// </summary>
public ImmutableHashSet<Type> To
{
get { return _to; }
}
}
/// <summary>
/// TBD
/// </summary>
public sealed class Unsubscribe : ISubscriptionMessage, IDeadLetterSuppression
{
private readonly IActorRef _subscriber;
private readonly Type _to;
/// <summary>
/// TBD
/// </summary>
/// <param name="subscriber">TBD</param>
/// <param name="to">TBD</param>
public Unsubscribe(IActorRef subscriber, Type to)
{
_to = to;
_subscriber = subscriber;
}
/// <summary>
/// TBD
/// </summary>
public IActorRef Subscriber
{
get { return _subscriber; }
}
/// <summary>
/// TBD
/// </summary>
public Type To
{
get { return _to; }
}
}
/// <summary>
/// TBD
/// </summary>
public sealed class SendCurrentClusterState : ISubscriptionMessage
{
private readonly IActorRef _receiver;
/// <summary>
/// TBD
/// </summary>
public IActorRef Receiver
{
get { return _receiver; }
}
/// <summary>
/// TBD
/// </summary>
/// <param name="receiver"><see cref="Akka.Cluster.ClusterEvent.CurrentClusterState"/> will be sent to the `receiver`</param>
public SendCurrentClusterState(IActorRef receiver)
{
_receiver = receiver;
}
}
/// <summary>
/// INTERNAL API.
///
/// Marker interface for publication events from Akka.Cluster.
/// </summary>
/// <remarks>
/// <see cref="INoSerializationVerificationNeeded"/> is not explicitly used on the JVM,
/// but without it we run into serialization issues via https://github.com/akkadotnet/akka.net/issues/3724
/// </remarks>
private interface IPublishMessage : INoSerializationVerificationNeeded { }
/// <summary>
/// INTERNAL API.
///
/// Used to publish Gossip and Membership changes inside Akka.Cluster.
/// </summary>
internal sealed class PublishChanges : IPublishMessage
{
/// <summary>
/// Creates a new <see cref="PublishChanges"/> message with updated membership state.
/// </summary>
/// <param name="newState">The membership state to publish internally.</param>
internal PublishChanges(MembershipState newState)
{
NewState = newState;
}
/// <summary>
/// The gossip being published.
/// </summary>
public MembershipState NewState { get; }
}
/// <summary>
/// INTERNAL API.
///
/// Used to publish events out to the cluster.
/// </summary>
internal sealed class PublishEvent : IPublishMessage
{
private readonly ClusterEvent.IClusterDomainEvent _event;
/// <summary>
/// TBD
/// </summary>
/// <param name="event">TBD</param>
internal PublishEvent(ClusterEvent.IClusterDomainEvent @event)
{
_event = @event;
}
/// <summary>
/// TBD
/// </summary>
public ClusterEvent.IClusterDomainEvent Event
{
get { return _event; }
}
}
}
/// <summary>
/// Supervisor managing the different Cluster daemons.
/// </summary>
internal sealed class ClusterDaemon : ReceiveActor, IRequiresMessageQueue<IUnboundedMessageQueueSemantics>
{
private Cluster _cluster;
private IActorRef _coreSupervisor;
private readonly ClusterSettings _settings;
private readonly ILoggingAdapter _log = Context.GetLogger();
private readonly CoordinatedShutdown _coordShutdown = CoordinatedShutdown.Get(Context.System);
private readonly TaskCompletionSource<Done> _clusterPromise = new TaskCompletionSource<Done>();
/// <summary>
/// Creates a new instance of the ClusterDaemon
/// </summary>
/// <param name="settings">The settings that will be used for the <see cref="Cluster"/>.</param>
public ClusterDaemon(ClusterSettings settings)
{
// Important - don't use Cluster(context.system) in constructor because that would
// cause deadlock. The Cluster extension is currently being created and is waiting
// for response from GetClusterCoreRef in its constructor.
// Child actors are therefore created when GetClusterCoreRef is received
_coreSupervisor = null;
_settings = settings;
AddCoordinatedLeave();
Receive<InternalClusterAction.GetClusterCoreRef>(msg =>
{
if (_coreSupervisor == null)
CreateChildren(msg.Cluster);
_coreSupervisor.Forward(msg);
});
Receive<InternalClusterAction.AddOnMemberUpListener>(msg =>
{
Context.ActorOf(
Props.Create(() => new OnMemberStatusChangedListener(_cluster, msg.Callback, MemberStatus.Up))
.WithDeploy(Deploy.Local));
});
Receive<InternalClusterAction.AddOnMemberRemovedListener>(msg =>
{
Context.ActorOf(
Props.Create(() => new OnMemberStatusChangedListener(_cluster, msg.Callback, MemberStatus.Removed))
.WithDeploy(Deploy.Local));
});
Receive<CoordinatedShutdownLeave.LeaveReq>(leave =>
{
var actor = Context.ActorOf(Props.Create(() => new CoordinatedShutdownLeave()));
// forward the Ask request so the shutdown task gets completed
actor.Forward(leave);
});
}
private void AddCoordinatedLeave()
{
var sys = Context.System;
var self = Self;
_coordShutdown.AddTask(CoordinatedShutdown.PhaseClusterLeave, "leave", () =>
{
if (_cluster is null || _cluster.IsTerminated || _cluster.SelfMember.Status == MemberStatus.Down)
{
return Task.FromResult(Done.Instance);
}
else
{
var timeout = _coordShutdown.Timeout(CoordinatedShutdown.PhaseClusterLeave);
return self.Ask<Done>(CoordinatedShutdownLeave.LeaveReq.Instance, timeout);
}
});
_coordShutdown.AddTask(CoordinatedShutdown.PhaseClusterShutdown, "wait-shutdown", () => _clusterPromise.Task);
}
private void CreateChildren(Cluster cluster)
{
_cluster = cluster;
_coreSupervisor = Context.ActorOf(Props.Create<ClusterCoreSupervisor>(), "core");
Context.ActorOf(ClusterHeartbeatReceiver.Props(cluster), "heartbeatReceiver");
}
protected override void PostStop()
{
_clusterPromise.TrySetResult(Done.Instance);
if (_settings.RunCoordinatedShutdownWhenDown)
{
// if it was stopped due to leaving CoordinatedShutdown was started earlier
_coordShutdown.Run(CoordinatedShutdown.ClusterDowningReason.Instance);
}
}
}
/// <summary>
/// ClusterCoreDaemon and ClusterDomainEventPublisher can't be restarted because the state
/// would be obsolete. Shutdown the member if any those actors crashed.
/// </summary>
internal class ClusterCoreSupervisor : ReceiveActor, IRequiresMessageQueue<IUnboundedMessageQueueSemantics>
{
private Cluster _cluster;
private IActorRef _publisher;
private IActorRef _coreDaemon;
private readonly ILoggingAdapter _log = Context.GetLogger();
/// <summary>
/// Creates a new instance of the ClusterCoreSupervisor
/// </summary>
public ClusterCoreSupervisor()
{
// Important - don't use Cluster(Context.System) in constructor because that would
// cause deadlock. The Cluster extension is currently being created and is waiting
// for response from GetClusterCoreRef in its constructor.
// Child actors are therefore created when GetClusterCoreRef is received
Receive<InternalClusterAction.GetClusterCoreRef>(cr =>
{
if (_coreDaemon == null)
CreateChildren(cr.Cluster);
Sender.Tell(_coreDaemon);
});
}
/// <summary>
/// TBD
/// </summary>
/// <returns>TBD</returns>
protected override SupervisorStrategy SupervisorStrategy()
{
return new OneForOneStrategy(e =>
{
//TODO: JVM version matches NonFatal. Can / should we do something similar?
_log.Error(e, "Cluster node [{0}] crashed, [{1}] - shutting down...",
_cluster?.SelfAddress, e);
Self.Tell(PoisonPill.Instance);
return Directive.Stop;
});
}
/// <summary>
/// TBD
/// </summary>
protected override void PostStop()
{
_cluster?.Shutdown();
}
private void CreateChildren(Cluster cluster)
{
_cluster = cluster;
_publisher =
Context.ActorOf(Props.Create(() => new ClusterDomainEventPublisher(_cluster.SelfUniqueAddress)).WithDispatcher(Context.Props.Dispatcher), "publisher");
_coreDaemon = Context.ActorOf(Props.Create(() => new ClusterCoreDaemon(_cluster, _publisher)).WithDispatcher(Context.Props.Dispatcher), "daemon");
Context.Watch(_coreDaemon);
}
}
/// <summary>
/// INTERNAL API
///
/// Actor used to power the guts of the Akka.Cluster membership and gossip protocols.
/// </summary>
internal class ClusterCoreDaemon : UntypedActor, IRequiresMessageQueue<IUnboundedMessageQueueSemantics>
{
private readonly Cluster _cluster;
/// <summary>
/// The current self-unique address.
/// </summary>
protected readonly UniqueAddress SelfUniqueAddress;
private const int NumberOfGossipsBeforeShutdownWhenLeaderExits = 5;
private const int MaxGossipsBeforeShuttingDownMyself = 5;
private const int MaxTicksBeforeShuttingDownMyself = 4;
private readonly VectorClock.Node _vclockNode;
internal static string VclockName(UniqueAddress node)
{
return node.Address + "-" + node.Uid;
}
private bool _isCurrentlyLeader;