opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/RaftActorTest.java

   1 /*
   2  * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.cluster.raft;
  10
  11 import static org.junit.Assert.assertArrayEquals;
  12 import static org.junit.Assert.assertEquals;
  13 import static org.junit.Assert.assertNotNull;
  14 import static org.junit.Assert.assertNotSame;
  15 import static org.junit.Assert.assertNull;
  16 import static org.junit.Assert.assertSame;
  17 import static org.junit.Assert.assertTrue;
  18 import static org.mockito.Matchers.any;
  19 import static org.mockito.Matchers.anyObject;
  20 import static org.mockito.Matchers.eq;
  21 import static org.mockito.Matchers.same;
  22 import static org.mockito.Mockito.doReturn;
  23 import static org.mockito.Mockito.mock;
  24 import static org.mockito.Mockito.never;
  25 import static org.mockito.Mockito.reset;
  26 import static org.mockito.Mockito.timeout;
  27 import static org.mockito.Mockito.verify;
  28 import akka.actor.ActorRef;
  29 import akka.actor.PoisonPill;
  30 import akka.actor.Props;
  31 import akka.actor.Status.Failure;
  32 import akka.actor.Terminated;
  33 import akka.dispatch.Dispatchers;
  34 import akka.japi.Procedure;
  35 import akka.persistence.SaveSnapshotFailure;
  36 import akka.persistence.SaveSnapshotSuccess;
  37 import akka.persistence.SnapshotMetadata;
  38 import akka.persistence.SnapshotOffer;
  39 import akka.testkit.JavaTestKit;
  40 import akka.testkit.TestActorRef;
  41 import com.google.common.base.Optional;
  42 import com.google.common.collect.ImmutableMap;
  43 import com.google.common.util.concurrent.Uninterruptibles;
  44 import com.google.protobuf.ByteString;
  45 import java.io.ByteArrayOutputStream;
  46 import java.io.ObjectOutputStream;
  47 import java.util.ArrayList;
  48 import java.util.Arrays;
  49 import java.util.Collections;
  50 import java.util.HashMap;
  51 import java.util.List;
  52 import java.util.Map;
  53 import java.util.concurrent.TimeUnit;
  54 import java.util.concurrent.TimeoutException;
  55 import org.apache.commons.lang3.SerializationUtils;
  56 import org.junit.After;
  57 import org.junit.Before;
  58 import org.junit.Test;
  59 import org.mockito.ArgumentCaptor;
  60 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  61 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  62 import org.opendaylight.controller.cluster.PersistentDataProvider;
  63 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  64 import org.opendaylight.controller.cluster.notifications.RoleChanged;
  65 import org.opendaylight.controller.cluster.raft.MockRaftActorContext.MockPayload;
  66 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  67 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  68 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  69 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  70 import org.opendaylight.controller.cluster.raft.base.messages.LeaderTransitioning;
  71 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  72 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  73 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  74 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  75 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  76 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshot;
  77 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshotReply;
  78 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  79 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
  80 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  81 import org.opendaylight.controller.cluster.raft.persisted.DeleteEntries;
  82 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  83 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  84 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
  85 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  86 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  87 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  88 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  89 import org.opendaylight.yangtools.concepts.Identifier;
  90 import org.slf4j.Logger;
  91 import org.slf4j.LoggerFactory;
  92 import scala.concurrent.duration.Duration;
  93 import scala.concurrent.duration.FiniteDuration;
  94
  95 public class RaftActorTest extends AbstractActorTest {
  96
  97     static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class);
  98
  99     private TestActorFactory factory;
 100
 101     @Before
 102     public void setUp(){
 103         factory = new TestActorFactory(getSystem());
 104     }
 105
 106     @After
 107     public void tearDown() throws Exception {
 108         factory.close();
 109         InMemoryJournal.clear();
 110         InMemorySnapshotStore.clear();
 111     }
 112
 113     @Test
 114     public void testConstruction() {
 115         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
 116     }
 117
 118     @Test
 119     public void testFindLeaderWhenLeaderIsSelf(){
 120         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
 121         kit.waitUntilLeader();
 122     }
 123
 124
 125     @Test
 126     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
 127         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting");
 128
 129         new JavaTestKit(getSystem()) {{
 130             String persistenceId = factory.generateActorId("follower-");
 131
 132             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 133
 134             // Set the heartbeat interval high to essentially disable election otherwise the test
 135             // may fail if the actor is switched to Leader and the commitIndex is set to the last
 136             // log entry.
 137             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 138
 139             ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 140             ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 141                     peerAddresses, config), persistenceId);
 142
 143             watch(followerActor);
 144
 145             List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 146             ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 147                     new MockRaftActorContext.MockPayload("E"));
 148             snapshotUnappliedEntries.add(entry1);
 149
 150             int lastAppliedDuringSnapshotCapture = 3;
 151             int lastIndexDuringSnapshotCapture = 4;
 152
 153             // 4 messages as part of snapshot, which are applied to state
 154             ByteString snapshotBytes = fromObject(Arrays.asList(
 155                     new MockRaftActorContext.MockPayload("A"),
 156                     new MockRaftActorContext.MockPayload("B"),
 157                     new MockRaftActorContext.MockPayload("C"),
 158                     new MockRaftActorContext.MockPayload("D")));
 159
 160             Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 161                     snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 162                     lastAppliedDuringSnapshotCapture, 1);
 163             InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 164
 165             // add more entries after snapshot is taken
 166             List<ReplicatedLogEntry> entries = new ArrayList<>();
 167             ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 168                     new MockRaftActorContext.MockPayload("F", 2));
 169             ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 170                     new MockRaftActorContext.MockPayload("G", 3));
 171             ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 172                     new MockRaftActorContext.MockPayload("H", 4));
 173             entries.add(entry2);
 174             entries.add(entry3);
 175             entries.add(entry4);
 176
 177             int lastAppliedToState = 5;
 178             int lastIndex = 7;
 179
 180             InMemoryJournal.addEntry(persistenceId, 5, entry2);
 181             // 2 entries are applied to state besides the 4 entries in snapshot
 182             InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 183             InMemoryJournal.addEntry(persistenceId, 7, entry3);
 184             InMemoryJournal.addEntry(persistenceId, 8, entry4);
 185
 186             // kill the actor
 187             followerActor.tell(PoisonPill.getInstance(), null);
 188             expectMsgClass(duration("5 seconds"), Terminated.class);
 189
 190             unwatch(followerActor);
 191
 192             //reinstate the actor
 193             TestActorRef<MockRaftActor> ref = factory.createTestActor(
 194                     MockRaftActor.props(persistenceId, peerAddresses, config));
 195
 196             MockRaftActor mockRaftActor = ref.underlyingActor();
 197
 198             mockRaftActor.waitForRecoveryComplete();
 199
 200             RaftActorContext context = mockRaftActor.getRaftActorContext();
 201             assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 202                     context.getReplicatedLog().size());
 203             assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 204             assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 205             assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 206             assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 207             assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 208
 209             mockRaftActor.waitForInitializeBehaviorComplete();
 210
 211             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 212         }};
 213
 214         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending");
 215     }
 216
 217     @Test
 218     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 219         new JavaTestKit(getSystem()) {{
 220             String persistenceId = factory.generateActorId("follower-");
 221
 222             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 223
 224             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 225
 226             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 227                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 228                     config, new NonPersistentDataProvider()), persistenceId);
 229
 230             MockRaftActor mockRaftActor = ref.underlyingActor();
 231
 232             mockRaftActor.waitForRecoveryComplete();
 233
 234             mockRaftActor.waitForInitializeBehaviorComplete();
 235
 236             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 237         }};
 238     }
 239
 240     @Test
 241     public void testUpdateElectionTermPersistedWithPersistenceDisabled() throws Exception {
 242         new JavaTestKit(getSystem()) {{
 243             String persistenceId = factory.generateActorId("follower-");
 244             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 245             config.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 246             config.setElectionTimeoutFactor(1);
 247
 248             InMemoryJournal.addWriteMessagesCompleteLatch(persistenceId, 1);
 249
 250             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 251                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 252                     config, new NonPersistentDataProvider()).
 253                             withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
 254
 255             InMemoryJournal.waitForWriteMessagesComplete(persistenceId);
 256             List<UpdateElectionTerm> entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 257             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 258             UpdateElectionTerm updateEntry = entries.get(0);
 259
 260             factory.killActor(ref, this);
 261
 262             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 263             ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 264                     ImmutableMap.<String, String>builder().put("member1", "address").build(), config,
 265                     new NonPersistentDataProvider()).
 266                             withDispatcher(Dispatchers.DefaultDispatcherId()),
 267                             factory.generateActorId("follower-"));
 268
 269             MockRaftActor actor = ref.underlyingActor();
 270             actor.waitForRecoveryComplete();
 271
 272             RaftActorContext newContext = actor.getRaftActorContext();
 273             assertEquals("electionTerm", updateEntry.getCurrentTerm(),
 274                     newContext.getTermInformation().getCurrentTerm());
 275             assertEquals("votedFor", updateEntry.getVotedFor(), newContext.getTermInformation().getVotedFor());
 276
 277             entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 278             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 279         }};
 280     }
 281
 282     @Test
 283     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 284         String persistenceId = factory.generateActorId("leader-");
 285
 286         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 287
 288         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 289
 290         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 291                 Collections.<String, String>emptyMap(), config), persistenceId);
 292
 293         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 294
 295         // Wait for akka's recovery to complete so it doesn't interfere.
 296         mockRaftActor.waitForRecoveryComplete();
 297
 298         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 299         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 300
 301         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 302         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 303         mockRaftActor.handleRecover(snapshotOffer);
 304
 305         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 306                 1, new MockRaftActorContext.MockPayload("1", 5));
 307         mockRaftActor.handleRecover(logEntry);
 308
 309         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 310         mockRaftActor.handleRecover(applyJournalEntries);
 311
 312         DeleteEntries deleteEntries = new DeleteEntries(1);
 313         mockRaftActor.handleRecover(deleteEntries);
 314
 315         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 316         mockRaftActor.handleRecover(updateElectionTerm);
 317
 318         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer), any(PersistentDataProvider.class));
 319         verify(mockSupport).handleRecoveryMessage(same(logEntry), any(PersistentDataProvider.class));
 320         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries), any(PersistentDataProvider.class));
 321         verify(mockSupport).handleRecoveryMessage(same(deleteEntries), any(PersistentDataProvider.class));
 322         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm), any(PersistentDataProvider.class));
 323     }
 324
 325     @Test
 326     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 327         String persistenceId = factory.generateActorId("leader-");
 328
 329         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 330
 331         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 332
 333         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 334
 335         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
 336                 config(config).snapshotMessageSupport(mockSupport).props());
 337
 338         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 339
 340         // Wait for akka's recovery to complete so it doesn't interfere.
 341         mockRaftActor.waitForRecoveryComplete();
 342
 343         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 344         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class));
 345         mockRaftActor.handleCommand(applySnapshot);
 346
 347         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 348         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class));
 349         mockRaftActor.handleCommand(captureSnapshot);
 350
 351         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 352         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class));
 353         mockRaftActor.handleCommand(captureSnapshotReply);
 354
 355         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(new SnapshotMetadata("", 0L, 0L));
 356         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class));
 357         mockRaftActor.handleCommand(saveSnapshotSuccess);
 358
 359         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(new SnapshotMetadata("", 0L, 0L), new Throwable());
 360         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class));
 361         mockRaftActor.handleCommand(saveSnapshotFailure);
 362
 363         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT),
 364                 any(ActorRef.class));
 365         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 366
 367         doReturn(true).when(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class));
 368         mockRaftActor.handleCommand(GetSnapshot.INSTANCE);
 369
 370         verify(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class));
 371         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class));
 372         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class));
 373         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class));
 374         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class));
 375         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT),
 376                 any(ActorRef.class));
 377         verify(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class));
 378     }
 379
 380     @Test
 381     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 382         new JavaTestKit(getSystem()) {
 383             {
 384                 String persistenceId = factory.generateActorId("leader-");
 385
 386                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 387
 388                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 389
 390                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 391
 392                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 393                         Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId);
 394
 395                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 396
 397                 mockRaftActor.waitForInitializeBehaviorComplete();
 398
 399                 mockRaftActor.waitUntilLeader();
 400
 401                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 402
 403                 verify(dataPersistenceProvider).persist(any(ApplyJournalEntries.class), any(Procedure.class));
 404
 405             }
 406
 407         };
 408     }
 409
 410     @Test
 411     public void testApplyState() throws Exception {
 412
 413         new JavaTestKit(getSystem()) {
 414             {
 415                 String persistenceId = factory.generateActorId("leader-");
 416
 417                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 418
 419                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 420
 421                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 422
 423                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 424                         Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId);
 425
 426                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 427
 428                 mockRaftActor.waitForInitializeBehaviorComplete();
 429
 430                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 431                         new MockRaftActorContext.MockPayload("F"));
 432
 433                 final Identifier id = new MockIdentifier("apply-state");
 434                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, id, entry));
 435
 436                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq(id), anyObject());
 437
 438             }
 439         };
 440     }
 441
 442     @Test
 443     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 444         new JavaTestKit(getSystem()) {{
 445             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 446                     Props.create(MessageCollectorActor.class));
 447             MessageCollectorActor.waitUntilReady(notifierActor);
 448
 449             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 450             long heartBeatInterval = 100;
 451             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 452             config.setElectionTimeoutFactor(20);
 453
 454             String persistenceId = factory.generateActorId("notifier-");
 455
 456             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
 457                     config(config).roleChangeNotifier(notifierActor).dataPersistenceProvider(
 458                             new NonPersistentDataProvider()).props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 459                             persistenceId);
 460
 461             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 462
 463
 464             // check if the notifier got a role change from null to Follower
 465             RoleChanged raftRoleChanged = matches.get(0);
 466             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 467             assertNull(raftRoleChanged.getOldRole());
 468             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 469
 470             // check if the notifier got a role change from Follower to Candidate
 471             raftRoleChanged = matches.get(1);
 472             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 473             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 474             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 475
 476             // check if the notifier got a role change from Candidate to Leader
 477             raftRoleChanged = matches.get(2);
 478             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 479             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 480             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 481
 482             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 483                     notifierActor, LeaderStateChanged.class);
 484
 485             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 486             assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 487
 488             notifierActor.underlyingActor().clear();
 489
 490             MockRaftActor raftActor = raftActorRef.underlyingActor();
 491             final String newLeaderId = "new-leader";
 492             final short newLeaderVersion = 6;
 493             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 494                 @Override
 495                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 496                     setLeaderId(newLeaderId);
 497                     setLeaderPayloadVersion(newLeaderVersion);
 498                     return this;
 499                 }
 500             };
 501
 502             raftActor.newBehavior(follower);
 503
 504             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 505             assertEquals(persistenceId, leaderStateChange.getMemberId());
 506             assertEquals(null, leaderStateChange.getLeaderId());
 507
 508             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 509             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 510             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 511
 512             notifierActor.underlyingActor().clear();
 513
 514             raftActor.handleCommand("any");
 515
 516             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 517             assertEquals(persistenceId, leaderStateChange.getMemberId());
 518             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 519             assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 520
 521             notifierActor.underlyingActor().clear();
 522
 523             raftActor.handleCommand("any");
 524
 525             Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 526             leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 527             assertNull(leaderStateChange);
 528         }};
 529     }
 530
 531     @Test
 532     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 533         new JavaTestKit(getSystem()) {{
 534             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 535             MessageCollectorActor.waitUntilReady(notifierActor);
 536
 537             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 538             long heartBeatInterval = 100;
 539             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 540             config.setElectionTimeoutFactor(1);
 541
 542             String persistenceId = factory.generateActorId("notifier-");
 543
 544             factory.createActor(MockRaftActor.builder().id(persistenceId).
 545                     peerAddresses(ImmutableMap.of("leader", "fake/path")).
 546                     config(config).roleChangeNotifier(notifierActor).props());
 547
 548             List<RoleChanged> matches =  null;
 549             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 550                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 551                 assertNotNull(matches);
 552                 if(matches.size() == 3) {
 553                     break;
 554                 }
 555                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 556             }
 557
 558             assertNotNull(matches);
 559             assertEquals(2, matches.size());
 560
 561             // check if the notifier got a role change from null to Follower
 562             RoleChanged raftRoleChanged = matches.get(0);
 563             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 564             assertNull(raftRoleChanged.getOldRole());
 565             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 566
 567             // check if the notifier got a role change from Follower to Candidate
 568             raftRoleChanged = matches.get(1);
 569             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 570             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 571             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 572
 573         }};
 574     }
 575
 576     @Test
 577     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 578         new JavaTestKit(getSystem()) {
 579             {
 580                 String persistenceId = factory.generateActorId("leader-");
 581                 String follower1Id = factory.generateActorId("follower-");
 582
 583                 ActorRef followerActor1 =
 584                         factory.createActor(Props.create(MessageCollectorActor.class));
 585
 586                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 587                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 588                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 589
 590                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 591
 592                 Map<String, String> peerAddresses = new HashMap<>();
 593                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 594
 595                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 596                         MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 597
 598                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 599
 600                 leaderActor.getRaftActorContext().setCommitIndex(4);
 601                 leaderActor.getRaftActorContext().setLastApplied(4);
 602                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 603
 604                 leaderActor.waitForInitializeBehaviorComplete();
 605
 606                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 607
 608                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 609                 leaderActor.setCurrentBehavior(leader);
 610                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 611
 612                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 613                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 614
 615                 assertEquals(8, leaderActor.getReplicatedLog().size());
 616
 617                 leaderActor.getRaftActorContext().getSnapshotManager()
 618                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 619                                 new MockRaftActorContext.MockPayload("x")), 4);
 620
 621                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 622
 623                 assertEquals(8, leaderActor.getReplicatedLog().size());
 624
 625                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 626                 //fake snapshot on index 5
 627                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 628
 629                 assertEquals(8, leaderActor.getReplicatedLog().size());
 630
 631                 //fake snapshot on index 6
 632                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 633                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 634                 assertEquals(8, leaderActor.getReplicatedLog().size());
 635
 636                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 637
 638                 assertEquals(8, leaderActor.getReplicatedLog().size());
 639
 640                 ByteString snapshotBytes = fromObject(Arrays.asList(
 641                         new MockRaftActorContext.MockPayload("foo-0"),
 642                         new MockRaftActorContext.MockPayload("foo-1"),
 643                         new MockRaftActorContext.MockPayload("foo-2"),
 644                         new MockRaftActorContext.MockPayload("foo-3"),
 645                         new MockRaftActorContext.MockPayload("foo-4")));
 646
 647                 leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 648                         Runtime.getRuntime().totalMemory());
 649
 650                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 651
 652                 // The commit is needed to complete the snapshot creation process
 653                 leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, -1);
 654
 655                 // capture snapshot reply should remove the snapshotted entries only
 656                 assertEquals(3, leaderActor.getReplicatedLog().size());
 657                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 658
 659                 // add another non-replicated entry
 660                 leaderActor.getReplicatedLog().append(
 661                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 662
 663                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 664                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 665                 assertEquals(2, leaderActor.getReplicatedLog().size());
 666                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 667
 668             }
 669         };
 670     }
 671
 672     @Test
 673     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 674         new JavaTestKit(getSystem()) {
 675             {
 676                 String persistenceId = factory.generateActorId("follower-");
 677                 String leaderId = factory.generateActorId("leader-");
 678
 679
 680                 ActorRef leaderActor1 =
 681                         factory.createActor(Props.create(MessageCollectorActor.class));
 682
 683                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 684                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 685                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 686
 687                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 688
 689                 Map<String, String> peerAddresses = new HashMap<>();
 690                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 691
 692                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 693                         MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 694
 695                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 696                 followerActor.getRaftActorContext().setCommitIndex(4);
 697                 followerActor.getRaftActorContext().setLastApplied(4);
 698                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 699
 700                 followerActor.waitForInitializeBehaviorComplete();
 701
 702
 703                 Follower follower = new Follower(followerActor.getRaftActorContext());
 704                 followerActor.setCurrentBehavior(follower);
 705                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 706
 707                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 708                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 709                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 710
 711                 // log has indices 0-5
 712                 assertEquals(6, followerActor.getReplicatedLog().size());
 713
 714                 //snapshot on 4
 715                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 716                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 717                                 new MockRaftActorContext.MockPayload("D")), 4);
 718
 719                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 720
 721                 assertEquals(6, followerActor.getReplicatedLog().size());
 722
 723                 //fake snapshot on index 6
 724                 List<ReplicatedLogEntry> entries =
 725                         Arrays.asList(
 726                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 727                                         new MockRaftActorContext.MockPayload("foo-6"))
 728                         );
 729                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 730                 assertEquals(7, followerActor.getReplicatedLog().size());
 731
 732                 //fake snapshot on index 7
 733                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 734
 735                 entries =
 736                         Arrays.asList(
 737                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 738                                         new MockRaftActorContext.MockPayload("foo-7"))
 739                         );
 740                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 741                 assertEquals(8, followerActor.getReplicatedLog().size());
 742
 743                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 744
 745
 746                 ByteString snapshotBytes = fromObject(Arrays.asList(
 747                         new MockRaftActorContext.MockPayload("foo-0"),
 748                         new MockRaftActorContext.MockPayload("foo-1"),
 749                         new MockRaftActorContext.MockPayload("foo-2"),
 750                         new MockRaftActorContext.MockPayload("foo-3"),
 751                         new MockRaftActorContext.MockPayload("foo-4")));
 752                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 753                 assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 754
 755                 // The commit is needed to complete the snapshot creation process
 756                 followerActor.getRaftActorContext().getSnapshotManager().commit(-1, -1);
 757
 758                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 759                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 760                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 761
 762                 entries =
 763                         Arrays.asList(
 764                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 765                                         new MockRaftActorContext.MockPayload("foo-7"))
 766                         );
 767                 // send an additional entry 8 with leaderCommit = 7
 768                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 769
 770                 // 7 and 8, as lastapplied is 7
 771                 assertEquals(2, followerActor.getReplicatedLog().size());
 772
 773             }
 774         };
 775     }
 776
 777     @Test
 778     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 779         new JavaTestKit(getSystem()) {
 780             {
 781                 String persistenceId = factory.generateActorId("leader-");
 782                 String follower1Id = factory.generateActorId("follower-");
 783                 String follower2Id = factory.generateActorId("follower-");
 784
 785                 ActorRef followerActor1 =
 786                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 787                 ActorRef followerActor2 =
 788                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 789
 790                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 791                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 792                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 793
 794                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 795
 796                 Map<String, String> peerAddresses = new HashMap<>();
 797                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 798                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 799
 800                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 801                         MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 802
 803                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 804                 leaderActor.getRaftActorContext().setCommitIndex(9);
 805                 leaderActor.getRaftActorContext().setLastApplied(9);
 806                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 807
 808                 leaderActor.waitForInitializeBehaviorComplete();
 809
 810                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 811                 leaderActor.setCurrentBehavior(leader);
 812                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 813
 814                 // create 5 entries in the log
 815                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 816                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 817
 818                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 819                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 820                 //setting replicatedToAllIndex = 9, for the log to clear
 821                 leader.setReplicatedToAllIndex(9);
 822                 assertEquals(5, leaderActor.getReplicatedLog().size());
 823                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 824
 825                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 826                 assertEquals(5, leaderActor.getReplicatedLog().size());
 827                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 828
 829                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 830                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 831                 assertEquals(5, leaderActor.getReplicatedLog().size());
 832                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 833
 834                 // simulate a real snapshot
 835                 leaderActor.onReceiveCommand(SendHeartBeat.INSTANCE);
 836                 assertEquals(5, leaderActor.getReplicatedLog().size());
 837                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 838                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 839                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 840
 841
 842                 //reply from a slow follower does not initiate a fake snapshot
 843                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 844                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 845
 846                 ByteString snapshotBytes = fromObject(Arrays.asList(
 847                         new MockRaftActorContext.MockPayload("foo-0"),
 848                         new MockRaftActorContext.MockPayload("foo-1"),
 849                         new MockRaftActorContext.MockPayload("foo-2"),
 850                         new MockRaftActorContext.MockPayload("foo-3"),
 851                         new MockRaftActorContext.MockPayload("foo-4")));
 852                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 853                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 854
 855                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 856
 857                 //reply from a slow follower after should not raise errors
 858                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 859                 assertEquals(0, leaderActor.getReplicatedLog().size());
 860             }
 861         };
 862     }
 863
 864     @Test
 865     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 866         new JavaTestKit(getSystem()) {{
 867             String persistenceId = factory.generateActorId("leader-");
 868             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 869             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 870             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 871             config.setSnapshotBatchCount(5);
 872
 873             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 874
 875             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 876
 877             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 878                     MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 879
 880             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 881             leaderActor.getRaftActorContext().setCommitIndex(3);
 882             leaderActor.getRaftActorContext().setLastApplied(3);
 883             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 884
 885             leaderActor.waitForInitializeBehaviorComplete();
 886             for(int i=0;i< 4;i++) {
 887                 leaderActor.getReplicatedLog()
 888                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 889                                 new MockRaftActorContext.MockPayload("A")));
 890             }
 891
 892             Leader leader = new Leader(leaderActor.getRaftActorContext());
 893             leaderActor.setCurrentBehavior(leader);
 894             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 895
 896             // Simulate an install snaphost to a follower.
 897             leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 898                     leaderActor.getReplicatedLog().last(), -1, "member1");
 899
 900             // Now send a CaptureSnapshotReply
 901             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 902
 903             // Trimming log in this scenario is a no-op
 904             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 905             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 906             assertEquals(-1, leader.getReplicatedToAllIndex());
 907
 908         }};
 909     }
 910
 911     @Test
 912     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 913         new JavaTestKit(getSystem()) {{
 914             String persistenceId = factory.generateActorId("leader-");
 915             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 916             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 917             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 918             config.setSnapshotBatchCount(5);
 919
 920             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 921
 922             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 923
 924             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 925                     MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 926
 927             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 928             leaderActor.getRaftActorContext().setCommitIndex(3);
 929             leaderActor.getRaftActorContext().setLastApplied(3);
 930             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 931             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 932
 933             leaderActor.waitForInitializeBehaviorComplete();
 934             Leader leader = new Leader(leaderActor.getRaftActorContext());
 935             leaderActor.setCurrentBehavior(leader);
 936             leader.setReplicatedToAllIndex(3);
 937             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 938
 939             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 940             leaderActor.persistData(mockActorRef, new MockIdentifier("x"),
 941                 new MockRaftActorContext.MockPayload("duh"));
 942
 943             // Now send a CaptureSnapshotReply
 944             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 945
 946             // Trimming log in this scenario is a no-op
 947             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 948             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 949             assertEquals(3, leader.getReplicatedToAllIndex());
 950
 951         }};
 952     }
 953
 954     @Test
 955     public void testSwitchBehavior(){
 956         String persistenceId = factory.generateActorId("leader-");
 957         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 958         config.setCustomRaftPolicyImplementationClass("org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 959         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 960         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 961         config.setSnapshotBatchCount(5);
 962
 963         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 964
 965         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 966
 967         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 968                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 969
 970         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 971
 972         leaderActor.waitForRecoveryComplete();
 973
 974         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 975
 976         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 977         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 978
 979         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 980
 981         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 982         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 983
 984         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 985
 986         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 987         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 988
 989         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 990
 991         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 992         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 993     }
 994
 995     public static ByteString fromObject(Object snapshot) throws Exception {
 996         ByteArrayOutputStream b = null;
 997         ObjectOutputStream o = null;
 998         try {
 999             b = new ByteArrayOutputStream();
1000             o = new ObjectOutputStream(b);
1001             o.writeObject(snapshot);
1002             byte[] snapshotBytes = b.toByteArray();
1003             return ByteString.copyFrom(snapshotBytes);
1004         } finally {
1005             if (o != null) {
1006                 o.flush();
1007                 o.close();
1008             }
1009             if (b != null) {
1010                 b.close();
1011             }
1012         }
1013     }
1014
1015     @Test
1016     public void testUpdateConfigParam() throws Exception {
1017         DefaultConfigParamsImpl emptyConfig = new DefaultConfigParamsImpl();
1018         String persistenceId = factory.generateActorId("follower-");
1019         ImmutableMap<String, String> peerAddresses =
1020             ImmutableMap.<String, String>builder().put("member1", "address").build();
1021         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
1022
1023         TestActorRef<MockRaftActor> actorRef = factory.createTestActor(
1024                 MockRaftActor.props(persistenceId, peerAddresses, emptyConfig, dataPersistenceProvider), persistenceId);
1025         MockRaftActor mockRaftActor = actorRef.underlyingActor();
1026         mockRaftActor.waitForInitializeBehaviorComplete();
1027
1028         RaftActorBehavior behavior = mockRaftActor.getCurrentBehavior();
1029         mockRaftActor.updateConfigParams(emptyConfig);
1030         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1031         assertEquals("Behavior State", RaftState.Follower,
1032             mockRaftActor.getCurrentBehavior().state());
1033
1034         DefaultConfigParamsImpl disableConfig = new DefaultConfigParamsImpl();
1035         disableConfig.setCustomRaftPolicyImplementationClass(
1036             "org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
1037         mockRaftActor.updateConfigParams(disableConfig);
1038         assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior());
1039         assertEquals("Behavior State", RaftState.Follower,
1040             mockRaftActor.getCurrentBehavior().state());
1041
1042         behavior = mockRaftActor.getCurrentBehavior();
1043         mockRaftActor.updateConfigParams(disableConfig);
1044         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1045         assertEquals("Behavior State", RaftState.Follower,
1046             mockRaftActor.getCurrentBehavior().state());
1047
1048         DefaultConfigParamsImpl defaultConfig = new DefaultConfigParamsImpl();
1049         defaultConfig.setCustomRaftPolicyImplementationClass(
1050             "org.opendaylight.controller.cluster.raft.policy.DefaultRaftPolicy");
1051         mockRaftActor.updateConfigParams(defaultConfig);
1052         assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior());
1053         assertEquals("Behavior State", RaftState.Follower,
1054             mockRaftActor.getCurrentBehavior().state());
1055
1056         behavior = mockRaftActor.getCurrentBehavior();
1057         mockRaftActor.updateConfigParams(defaultConfig);
1058         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1059         assertEquals("Behavior State", RaftState.Follower,
1060             mockRaftActor.getCurrentBehavior().state());
1061     }
1062
1063     @Test
1064     public void testGetSnapshot() throws Exception {
1065         TEST_LOG.info("testGetSnapshot starting");
1066
1067         JavaTestKit kit = new JavaTestKit(getSystem());
1068
1069         String persistenceId = factory.generateActorId("test-actor-");
1070         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1071         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1072
1073         long term = 3;
1074         long seqN = 1;
1075         InMemoryJournal.addEntry(persistenceId, seqN++, new UpdateElectionTerm(term, "member-1"));
1076         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 0,
1077                 new MockRaftActorContext.MockPayload("A")));
1078         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 1,
1079                 new MockRaftActorContext.MockPayload("B")));
1080         InMemoryJournal.addEntry(persistenceId, seqN++, new ApplyJournalEntries(1));
1081         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 2,
1082                 new MockRaftActorContext.MockPayload("C")));
1083
1084         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
1085                 ImmutableMap.<String, String>builder().put("member1", "address").build(), config).
1086                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1087         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1088
1089         mockRaftActor.waitForRecoveryComplete();
1090
1091         mockRaftActor.snapshotCohortDelegate = mock(RaftActorSnapshotCohort.class);
1092
1093         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1094
1095         ArgumentCaptor<ActorRef> replyActor = ArgumentCaptor.forClass(ActorRef.class);
1096         verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).createSnapshot(replyActor.capture());
1097
1098         byte[] stateSnapshot = new byte[]{1,2,3};
1099         replyActor.getValue().tell(new CaptureSnapshotReply(stateSnapshot), ActorRef.noSender());
1100
1101         GetSnapshotReply reply = kit.expectMsgClass(GetSnapshotReply.class);
1102
1103         assertEquals("getId", persistenceId, reply.getId());
1104         Snapshot replySnapshot = SerializationUtils.deserialize(reply.getSnapshot());
1105         assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm());
1106         assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor());
1107         assertEquals("getLastAppliedIndex", 1L, replySnapshot.getLastAppliedIndex());
1108         assertEquals("getLastAppliedTerm", term, replySnapshot.getLastAppliedTerm());
1109         assertEquals("getLastIndex", 2L, replySnapshot.getLastIndex());
1110         assertEquals("getLastTerm", term, replySnapshot.getLastTerm());
1111         assertArrayEquals("getState", stateSnapshot, replySnapshot.getState());
1112         assertEquals("getUnAppliedEntries size", 1, replySnapshot.getUnAppliedEntries().size());
1113         assertEquals("UnApplied entry index ", 2L, replySnapshot.getUnAppliedEntries().get(0).getIndex());
1114
1115         // Test with timeout
1116
1117         mockRaftActor.getSnapshotMessageSupport().setSnapshotReplyActorTimeout(Duration.create(200, TimeUnit.MILLISECONDS));
1118         reset(mockRaftActor.snapshotCohortDelegate);
1119
1120         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1121         Failure failure = kit.expectMsgClass(akka.actor.Status.Failure.class);
1122         assertEquals("Failure cause type", TimeoutException.class, failure.cause().getClass());
1123
1124         mockRaftActor.getSnapshotMessageSupport().setSnapshotReplyActorTimeout(Duration.create(30, TimeUnit.SECONDS));
1125
1126         // Test with persistence disabled.
1127
1128         mockRaftActor.setPersistence(false);
1129         reset(mockRaftActor.snapshotCohortDelegate);
1130
1131         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1132         reply = kit.expectMsgClass(GetSnapshotReply.class);
1133         verify(mockRaftActor.snapshotCohortDelegate, never()).createSnapshot(any(ActorRef.class));
1134
1135         assertEquals("getId", persistenceId, reply.getId());
1136         replySnapshot = SerializationUtils.deserialize(reply.getSnapshot());
1137         assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm());
1138         assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor());
1139         assertEquals("getLastAppliedIndex", -1L, replySnapshot.getLastAppliedIndex());
1140         assertEquals("getLastAppliedTerm", -1L, replySnapshot.getLastAppliedTerm());
1141         assertEquals("getLastIndex", -1L, replySnapshot.getLastIndex());
1142         assertEquals("getLastTerm", -1L, replySnapshot.getLastTerm());
1143         assertEquals("getState length", 0, replySnapshot.getState().length);
1144         assertEquals("getUnAppliedEntries size", 0, replySnapshot.getUnAppliedEntries().size());
1145
1146         TEST_LOG.info("testGetSnapshot ending");
1147     }
1148
1149     @Test
1150     public void testRestoreFromSnapshot() throws Exception {
1151         TEST_LOG.info("testRestoreFromSnapshot starting");
1152
1153         String persistenceId = factory.generateActorId("test-actor-");
1154         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1155         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1156
1157         List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
1158         snapshotUnappliedEntries.add(new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
1159                 new MockRaftActorContext.MockPayload("E")));
1160
1161         int snapshotLastApplied = 3;
1162         int snapshotLastIndex = 4;
1163
1164         List<MockPayload> state = Arrays.asList(
1165                 new MockRaftActorContext.MockPayload("A"),
1166                 new MockRaftActorContext.MockPayload("B"),
1167                 new MockRaftActorContext.MockPayload("C"),
1168                 new MockRaftActorContext.MockPayload("D"));
1169         ByteString stateBytes = fromObject(state);
1170
1171         Snapshot snapshot = Snapshot.create(stateBytes.toByteArray(), snapshotUnappliedEntries,
1172                 snapshotLastIndex, 1, snapshotLastApplied, 1, 1, "member-1");
1173
1174         InMemorySnapshotStore.addSnapshotSavedLatch(persistenceId);
1175
1176         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1177                 config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props().
1178                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1179         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1180
1181         mockRaftActor.waitForRecoveryComplete();
1182
1183         Snapshot savedSnapshot = InMemorySnapshotStore.waitForSavedSnapshot(persistenceId, Snapshot.class);
1184         assertEquals("getElectionTerm", snapshot.getElectionTerm(), savedSnapshot.getElectionTerm());
1185         assertEquals("getElectionVotedFor", snapshot.getElectionVotedFor(), savedSnapshot.getElectionVotedFor());
1186         assertEquals("getLastAppliedIndex", snapshot.getLastAppliedIndex(), savedSnapshot.getLastAppliedIndex());
1187         assertEquals("getLastAppliedTerm", snapshot.getLastAppliedTerm(), savedSnapshot.getLastAppliedTerm());
1188         assertEquals("getLastIndex", snapshot.getLastIndex(), savedSnapshot.getLastIndex());
1189         assertEquals("getLastTerm", snapshot.getLastTerm(), savedSnapshot.getLastTerm());
1190         assertArrayEquals("getState", snapshot.getState(), savedSnapshot.getState());
1191         assertEquals("getUnAppliedEntries", snapshot.getUnAppliedEntries(), savedSnapshot.getUnAppliedEntries());
1192
1193         verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).applySnapshot(any(byte[].class));
1194
1195         RaftActorContext context = mockRaftActor.getRaftActorContext();
1196         assertEquals("Journal log size", 1, context.getReplicatedLog().size());
1197         assertEquals("Last index", snapshotLastIndex, context.getReplicatedLog().lastIndex());
1198         assertEquals("Last applied", snapshotLastApplied, context.getLastApplied());
1199         assertEquals("Commit index", snapshotLastApplied, context.getCommitIndex());
1200         assertEquals("Recovered state", state, mockRaftActor.getState());
1201         assertEquals("Current term", 1L, context.getTermInformation().getCurrentTerm());
1202         assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor());
1203
1204         // Test with data persistence disabled
1205
1206         snapshot = Snapshot.create(new byte[0], Collections.<ReplicatedLogEntry>emptyList(),
1207                 -1, -1, -1, -1, 5, "member-1");
1208
1209         persistenceId = factory.generateActorId("test-actor-");
1210
1211         raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1212                 config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).
1213                 persistent(Optional.of(Boolean.FALSE)).props().
1214                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1215         mockRaftActor = raftActorRef.underlyingActor();
1216
1217         mockRaftActor.waitForRecoveryComplete();
1218         assertEquals("snapshot committed", true,
1219                 Uninterruptibles.awaitUninterruptibly(mockRaftActor.snapshotCommitted, 5, TimeUnit.SECONDS));
1220
1221         context = mockRaftActor.getRaftActorContext();
1222         assertEquals("Current term", 5L, context.getTermInformation().getCurrentTerm());
1223         assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor());
1224
1225         TEST_LOG.info("testRestoreFromSnapshot ending");
1226     }
1227
1228     @Test
1229     public void testRestoreFromSnapshotWithRecoveredData() throws Exception {
1230         TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData starting");
1231
1232         String persistenceId = factory.generateActorId("test-actor-");
1233         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1234         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1235
1236         List<MockPayload> state = Arrays.asList(new MockRaftActorContext.MockPayload("A"));
1237         Snapshot snapshot = Snapshot.create(fromObject(state).toByteArray(), Arrays.<ReplicatedLogEntry>asList(),
1238                 5, 2, 5, 2, 2, "member-1");
1239
1240         InMemoryJournal.addEntry(persistenceId, 1, new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
1241                 new MockRaftActorContext.MockPayload("B")));
1242
1243         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1244                 config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props().
1245                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1246         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1247
1248         mockRaftActor.waitForRecoveryComplete();
1249
1250         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
1251         verify(mockRaftActor.snapshotCohortDelegate, never()).applySnapshot(any(byte[].class));
1252
1253         RaftActorContext context = mockRaftActor.getRaftActorContext();
1254         assertEquals("Journal log size", 1, context.getReplicatedLog().size());
1255         assertEquals("Last index", 0, context.getReplicatedLog().lastIndex());
1256         assertEquals("Last applied", -1, context.getLastApplied());
1257         assertEquals("Commit index", -1, context.getCommitIndex());
1258         assertEquals("Current term", 0, context.getTermInformation().getCurrentTerm());
1259         assertEquals("Voted for", null, context.getTermInformation().getVotedFor());
1260
1261         TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData ending");
1262     }
1263
1264     @Test
1265     public void testNonVotingOnRecovery() throws Exception {
1266         TEST_LOG.info("testNonVotingOnRecovery starting");
1267
1268         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1269         config.setElectionTimeoutFactor(1);
1270         config.setHeartBeatInterval(FiniteDuration.create(1, TimeUnit.MILLISECONDS));
1271
1272         String persistenceId = factory.generateActorId("test-actor-");
1273         InMemoryJournal.addEntry(persistenceId, 1,  new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
1274                 new ServerConfigurationPayload(Arrays.asList(new ServerInfo(persistenceId, false)))));
1275
1276         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1277                 config(config).props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1278         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1279
1280         mockRaftActor.waitForInitializeBehaviorComplete();
1281
1282         // Sleep a bit and verify it didn't get an election timeout and schedule an election.
1283
1284         Uninterruptibles.sleepUninterruptibly(400, TimeUnit.MILLISECONDS);
1285         assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
1286
1287         TEST_LOG.info("testNonVotingOnRecovery ending");
1288     }
1289
1290     @Test
1291     public void testLeaderTransitioning() throws Exception {
1292         TEST_LOG.info("testLeaderTransitioning starting");
1293
1294         TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
1295                 Props.create(MessageCollectorActor.class));
1296
1297         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1298         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1299
1300         String persistenceId = factory.generateActorId("test-actor-");
1301
1302         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1303                 config(config).roleChangeNotifier(notifierActor).props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1304         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1305
1306         mockRaftActor.waitForInitializeBehaviorComplete();
1307
1308         raftActorRef.tell(new AppendEntries(1L, "leader", 0L, 1L, Collections.<ReplicatedLogEntry>emptyList(),
1309                 0L, -1L, (short)1), ActorRef.noSender());
1310         LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
1311                 notifierActor, LeaderStateChanged.class);
1312         assertEquals("getLeaderId", "leader", leaderStateChange.getLeaderId());
1313
1314         MessageCollectorActor.clearMessages(notifierActor);
1315
1316         raftActorRef.tell(LeaderTransitioning.INSTANCE, ActorRef.noSender());
1317
1318         leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
1319         assertEquals("getMemberId", persistenceId, leaderStateChange.getMemberId());
1320         assertEquals("getLeaderId", null, leaderStateChange.getLeaderId());
1321
1322         TEST_LOG.info("testLeaderTransitioning ending");
1323     }
1324 }