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.ServerConfigurationPayload.ServerInfo;
  67 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  68 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  69 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  70 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  71 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  72 import org.opendaylight.controller.cluster.raft.base.messages.DeleteEntries;
  73 import org.opendaylight.controller.cluster.raft.base.messages.LeaderTransitioning;
  74 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  75 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  76 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  77 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  78 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  79 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  80 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshot;
  81 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshotReply;
  82 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  83 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
  84 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  85 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  86 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  87 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  88 import org.opendaylight.yangtools.concepts.Identifier;
  89 import org.slf4j.Logger;
  90 import org.slf4j.LoggerFactory;
  91 import scala.concurrent.duration.Duration;
  92 import scala.concurrent.duration.FiniteDuration;
  93
  94 public class RaftActorTest extends AbstractActorTest {
  95
  96     static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class);
  97
  98     private TestActorFactory factory;
  99
 100     @Before
 101     public void setUp(){
 102         factory = new TestActorFactory(getSystem());
 103     }
 104
 105     @After
 106     public void tearDown() throws Exception {
 107         factory.close();
 108         InMemoryJournal.clear();
 109         InMemorySnapshotStore.clear();
 110     }
 111
 112     @Test
 113     public void testConstruction() {
 114         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
 115     }
 116
 117     @Test
 118     public void testFindLeaderWhenLeaderIsSelf(){
 119         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
 120         kit.waitUntilLeader();
 121     }
 122
 123
 124     @Test
 125     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
 126         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting");
 127
 128         new JavaTestKit(getSystem()) {{
 129             String persistenceId = factory.generateActorId("follower-");
 130
 131             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 132
 133             // Set the heartbeat interval high to essentially disable election otherwise the test
 134             // may fail if the actor is switched to Leader and the commitIndex is set to the last
 135             // log entry.
 136             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 137
 138             ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 139             ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 140                     peerAddresses, config), persistenceId);
 141
 142             watch(followerActor);
 143
 144             List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 145             ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 146                     new MockRaftActorContext.MockPayload("E"));
 147             snapshotUnappliedEntries.add(entry1);
 148
 149             int lastAppliedDuringSnapshotCapture = 3;
 150             int lastIndexDuringSnapshotCapture = 4;
 151
 152             // 4 messages as part of snapshot, which are applied to state
 153             ByteString snapshotBytes = fromObject(Arrays.asList(
 154                     new MockRaftActorContext.MockPayload("A"),
 155                     new MockRaftActorContext.MockPayload("B"),
 156                     new MockRaftActorContext.MockPayload("C"),
 157                     new MockRaftActorContext.MockPayload("D")));
 158
 159             Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 160                     snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 161                     lastAppliedDuringSnapshotCapture, 1);
 162             InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 163
 164             // add more entries after snapshot is taken
 165             List<ReplicatedLogEntry> entries = new ArrayList<>();
 166             ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 167                     new MockRaftActorContext.MockPayload("F", 2));
 168             ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 169                     new MockRaftActorContext.MockPayload("G", 3));
 170             ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 171                     new MockRaftActorContext.MockPayload("H", 4));
 172             entries.add(entry2);
 173             entries.add(entry3);
 174             entries.add(entry4);
 175
 176             int lastAppliedToState = 5;
 177             int lastIndex = 7;
 178
 179             InMemoryJournal.addEntry(persistenceId, 5, entry2);
 180             // 2 entries are applied to state besides the 4 entries in snapshot
 181             InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 182             InMemoryJournal.addEntry(persistenceId, 7, entry3);
 183             InMemoryJournal.addEntry(persistenceId, 8, entry4);
 184
 185             // kill the actor
 186             followerActor.tell(PoisonPill.getInstance(), null);
 187             expectMsgClass(duration("5 seconds"), Terminated.class);
 188
 189             unwatch(followerActor);
 190
 191             //reinstate the actor
 192             TestActorRef<MockRaftActor> ref = factory.createTestActor(
 193                     MockRaftActor.props(persistenceId, peerAddresses, config));
 194
 195             MockRaftActor mockRaftActor = ref.underlyingActor();
 196
 197             mockRaftActor.waitForRecoveryComplete();
 198
 199             RaftActorContext context = mockRaftActor.getRaftActorContext();
 200             assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 201                     context.getReplicatedLog().size());
 202             assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 203             assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 204             assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 205             assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 206             assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 207
 208             mockRaftActor.waitForInitializeBehaviorComplete();
 209
 210             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 211         }};
 212
 213         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending");
 214     }
 215
 216     @Test
 217     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 218         new JavaTestKit(getSystem()) {{
 219             String persistenceId = factory.generateActorId("follower-");
 220
 221             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 222
 223             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 224
 225             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 226                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 227                     config, new NonPersistentDataProvider()), persistenceId);
 228
 229             MockRaftActor mockRaftActor = ref.underlyingActor();
 230
 231             mockRaftActor.waitForRecoveryComplete();
 232
 233             mockRaftActor.waitForInitializeBehaviorComplete();
 234
 235             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 236         }};
 237     }
 238
 239     @Test
 240     public void testUpdateElectionTermPersistedWithPersistenceDisabled() throws Exception {
 241         new JavaTestKit(getSystem()) {{
 242             String persistenceId = factory.generateActorId("follower-");
 243             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 244             config.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 245             config.setElectionTimeoutFactor(1);
 246
 247             InMemoryJournal.addWriteMessagesCompleteLatch(persistenceId, 1);
 248
 249             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 250                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 251                     config, new NonPersistentDataProvider()).
 252                             withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
 253
 254             InMemoryJournal.waitForWriteMessagesComplete(persistenceId);
 255             List<UpdateElectionTerm> entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 256             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 257             UpdateElectionTerm updateEntry = entries.get(0);
 258
 259             factory.killActor(ref, this);
 260
 261             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 262             ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 263                     ImmutableMap.<String, String>builder().put("member1", "address").build(), config,
 264                     new NonPersistentDataProvider()).
 265                             withDispatcher(Dispatchers.DefaultDispatcherId()),
 266                             factory.generateActorId("follower-"));
 267
 268             MockRaftActor actor = ref.underlyingActor();
 269             actor.waitForRecoveryComplete();
 270
 271             RaftActorContext newContext = actor.getRaftActorContext();
 272             assertEquals("electionTerm", updateEntry.getCurrentTerm(),
 273                     newContext.getTermInformation().getCurrentTerm());
 274             assertEquals("votedFor", updateEntry.getVotedFor(), newContext.getTermInformation().getVotedFor());
 275
 276             entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 277             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 278         }};
 279     }
 280
 281     @Test
 282     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 283         String persistenceId = factory.generateActorId("leader-");
 284
 285         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 286
 287         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 288
 289         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 290                 Collections.<String, String>emptyMap(), config), persistenceId);
 291
 292         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 293
 294         // Wait for akka's recovery to complete so it doesn't interfere.
 295         mockRaftActor.waitForRecoveryComplete();
 296
 297         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 298         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 299
 300         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 301         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 302         mockRaftActor.handleRecover(snapshotOffer);
 303
 304         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 305                 1, new MockRaftActorContext.MockPayload("1", 5));
 306         mockRaftActor.handleRecover(logEntry);
 307
 308         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 309         mockRaftActor.handleRecover(applyJournalEntries);
 310
 311         DeleteEntries deleteEntries = new DeleteEntries(1);
 312         mockRaftActor.handleRecover(deleteEntries);
 313
 314         org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries deprecatedDeleteEntries =
 315                 new org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries(1);
 316         mockRaftActor.handleRecover(deprecatedDeleteEntries);
 317
 318         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 319         mockRaftActor.handleRecover(updateElectionTerm);
 320
 321         org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm deprecatedUpdateElectionTerm =
 322                 new org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm(6, "member3");
 323         mockRaftActor.handleRecover(deprecatedUpdateElectionTerm);
 324
 325         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer), any(PersistentDataProvider.class));
 326         verify(mockSupport).handleRecoveryMessage(same(logEntry), any(PersistentDataProvider.class));
 327         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries), any(PersistentDataProvider.class));
 328         verify(mockSupport).handleRecoveryMessage(same(deleteEntries), any(PersistentDataProvider.class));
 329         verify(mockSupport).handleRecoveryMessage(same(deprecatedDeleteEntries), any(PersistentDataProvider.class));
 330         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm), any(PersistentDataProvider.class));
 331         verify(mockSupport).handleRecoveryMessage(same(deprecatedUpdateElectionTerm), any(PersistentDataProvider.class));
 332     }
 333
 334     @Test
 335     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 336         String persistenceId = factory.generateActorId("leader-");
 337
 338         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 339
 340         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 341
 342         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 343
 344         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
 345                 config(config).snapshotMessageSupport(mockSupport).props());
 346
 347         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 348
 349         // Wait for akka's recovery to complete so it doesn't interfere.
 350         mockRaftActor.waitForRecoveryComplete();
 351
 352         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 353         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class));
 354         mockRaftActor.handleCommand(applySnapshot);
 355
 356         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 357         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class));
 358         mockRaftActor.handleCommand(captureSnapshot);
 359
 360         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 361         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class));
 362         mockRaftActor.handleCommand(captureSnapshotReply);
 363
 364         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(new SnapshotMetadata("", 0L, 0L));
 365         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class));
 366         mockRaftActor.handleCommand(saveSnapshotSuccess);
 367
 368         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(new SnapshotMetadata("", 0L, 0L), new Throwable());
 369         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class));
 370         mockRaftActor.handleCommand(saveSnapshotFailure);
 371
 372         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT),
 373                 any(ActorRef.class));
 374         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 375
 376         doReturn(true).when(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class));
 377         mockRaftActor.handleCommand(GetSnapshot.INSTANCE);
 378
 379         verify(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class));
 380         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class));
 381         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class));
 382         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class));
 383         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class));
 384         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT),
 385                 any(ActorRef.class));
 386         verify(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class));
 387     }
 388
 389     @Test
 390     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 391         new JavaTestKit(getSystem()) {
 392             {
 393                 String persistenceId = factory.generateActorId("leader-");
 394
 395                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 396
 397                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 398
 399                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 400
 401                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 402                         Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId);
 403
 404                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 405
 406                 mockRaftActor.waitForInitializeBehaviorComplete();
 407
 408                 mockRaftActor.waitUntilLeader();
 409
 410                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 411
 412                 verify(dataPersistenceProvider).persist(any(ApplyJournalEntries.class), any(Procedure.class));
 413
 414             }
 415
 416         };
 417     }
 418
 419     @Test
 420     public void testApplyState() throws Exception {
 421
 422         new JavaTestKit(getSystem()) {
 423             {
 424                 String persistenceId = factory.generateActorId("leader-");
 425
 426                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 427
 428                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 429
 430                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 431
 432                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 433                         Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId);
 434
 435                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 436
 437                 mockRaftActor.waitForInitializeBehaviorComplete();
 438
 439                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 440                         new MockRaftActorContext.MockPayload("F"));
 441
 442                 final Identifier id = new MockIdentifier("apply-state");
 443                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, id, entry));
 444
 445                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq(id), anyObject());
 446
 447             }
 448         };
 449     }
 450
 451     @Test
 452     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 453         new JavaTestKit(getSystem()) {{
 454             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 455                     Props.create(MessageCollectorActor.class));
 456             MessageCollectorActor.waitUntilReady(notifierActor);
 457
 458             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 459             long heartBeatInterval = 100;
 460             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 461             config.setElectionTimeoutFactor(20);
 462
 463             String persistenceId = factory.generateActorId("notifier-");
 464
 465             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
 466                     config(config).roleChangeNotifier(notifierActor).dataPersistenceProvider(
 467                             new NonPersistentDataProvider()).props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 468                             persistenceId);
 469
 470             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 471
 472
 473             // check if the notifier got a role change from null to Follower
 474             RoleChanged raftRoleChanged = matches.get(0);
 475             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 476             assertNull(raftRoleChanged.getOldRole());
 477             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 478
 479             // check if the notifier got a role change from Follower to Candidate
 480             raftRoleChanged = matches.get(1);
 481             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 482             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 483             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 484
 485             // check if the notifier got a role change from Candidate to Leader
 486             raftRoleChanged = matches.get(2);
 487             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 488             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 489             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 490
 491             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 492                     notifierActor, LeaderStateChanged.class);
 493
 494             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 495             assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 496
 497             notifierActor.underlyingActor().clear();
 498
 499             MockRaftActor raftActor = raftActorRef.underlyingActor();
 500             final String newLeaderId = "new-leader";
 501             final short newLeaderVersion = 6;
 502             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 503                 @Override
 504                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 505                     setLeaderId(newLeaderId);
 506                     setLeaderPayloadVersion(newLeaderVersion);
 507                     return this;
 508                 }
 509             };
 510
 511             raftActor.newBehavior(follower);
 512
 513             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 514             assertEquals(persistenceId, leaderStateChange.getMemberId());
 515             assertEquals(null, leaderStateChange.getLeaderId());
 516
 517             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 518             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 519             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 520
 521             notifierActor.underlyingActor().clear();
 522
 523             raftActor.handleCommand("any");
 524
 525             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 526             assertEquals(persistenceId, leaderStateChange.getMemberId());
 527             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 528             assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 529
 530             notifierActor.underlyingActor().clear();
 531
 532             raftActor.handleCommand("any");
 533
 534             Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 535             leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 536             assertNull(leaderStateChange);
 537         }};
 538     }
 539
 540     @Test
 541     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 542         new JavaTestKit(getSystem()) {{
 543             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 544             MessageCollectorActor.waitUntilReady(notifierActor);
 545
 546             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 547             long heartBeatInterval = 100;
 548             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 549             config.setElectionTimeoutFactor(1);
 550
 551             String persistenceId = factory.generateActorId("notifier-");
 552
 553             factory.createActor(MockRaftActor.builder().id(persistenceId).
 554                     peerAddresses(ImmutableMap.of("leader", "fake/path")).
 555                     config(config).roleChangeNotifier(notifierActor).props());
 556
 557             List<RoleChanged> matches =  null;
 558             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 559                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 560                 assertNotNull(matches);
 561                 if(matches.size() == 3) {
 562                     break;
 563                 }
 564                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 565             }
 566
 567             assertNotNull(matches);
 568             assertEquals(2, matches.size());
 569
 570             // check if the notifier got a role change from null to Follower
 571             RoleChanged raftRoleChanged = matches.get(0);
 572             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 573             assertNull(raftRoleChanged.getOldRole());
 574             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 575
 576             // check if the notifier got a role change from Follower to Candidate
 577             raftRoleChanged = matches.get(1);
 578             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 579             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 580             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 581
 582         }};
 583     }
 584
 585     @Test
 586     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 587         new JavaTestKit(getSystem()) {
 588             {
 589                 String persistenceId = factory.generateActorId("leader-");
 590                 String follower1Id = factory.generateActorId("follower-");
 591
 592                 ActorRef followerActor1 =
 593                         factory.createActor(Props.create(MessageCollectorActor.class));
 594
 595                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 596                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 597                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 598
 599                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 600
 601                 Map<String, String> peerAddresses = new HashMap<>();
 602                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 603
 604                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 605                         MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 606
 607                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 608
 609                 leaderActor.getRaftActorContext().setCommitIndex(4);
 610                 leaderActor.getRaftActorContext().setLastApplied(4);
 611                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 612
 613                 leaderActor.waitForInitializeBehaviorComplete();
 614
 615                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 616
 617                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 618                 leaderActor.setCurrentBehavior(leader);
 619                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 620
 621                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 622                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 623
 624                 assertEquals(8, leaderActor.getReplicatedLog().size());
 625
 626                 leaderActor.getRaftActorContext().getSnapshotManager()
 627                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 628                                 new MockRaftActorContext.MockPayload("x")), 4);
 629
 630                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 631
 632                 assertEquals(8, leaderActor.getReplicatedLog().size());
 633
 634                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 635                 //fake snapshot on index 5
 636                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 637
 638                 assertEquals(8, leaderActor.getReplicatedLog().size());
 639
 640                 //fake snapshot on index 6
 641                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 642                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 643                 assertEquals(8, leaderActor.getReplicatedLog().size());
 644
 645                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 646
 647                 assertEquals(8, leaderActor.getReplicatedLog().size());
 648
 649                 ByteString snapshotBytes = fromObject(Arrays.asList(
 650                         new MockRaftActorContext.MockPayload("foo-0"),
 651                         new MockRaftActorContext.MockPayload("foo-1"),
 652                         new MockRaftActorContext.MockPayload("foo-2"),
 653                         new MockRaftActorContext.MockPayload("foo-3"),
 654                         new MockRaftActorContext.MockPayload("foo-4")));
 655
 656                 leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 657                         Runtime.getRuntime().totalMemory());
 658
 659                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 660
 661                 // The commit is needed to complete the snapshot creation process
 662                 leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, -1);
 663
 664                 // capture snapshot reply should remove the snapshotted entries only
 665                 assertEquals(3, leaderActor.getReplicatedLog().size());
 666                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 667
 668                 // add another non-replicated entry
 669                 leaderActor.getReplicatedLog().append(
 670                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 671
 672                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 673                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 674                 assertEquals(2, leaderActor.getReplicatedLog().size());
 675                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 676
 677             }
 678         };
 679     }
 680
 681     @Test
 682     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 683         new JavaTestKit(getSystem()) {
 684             {
 685                 String persistenceId = factory.generateActorId("follower-");
 686                 String leaderId = factory.generateActorId("leader-");
 687
 688
 689                 ActorRef leaderActor1 =
 690                         factory.createActor(Props.create(MessageCollectorActor.class));
 691
 692                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 693                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 694                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 695
 696                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 697
 698                 Map<String, String> peerAddresses = new HashMap<>();
 699                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 700
 701                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 702                         MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 703
 704                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 705                 followerActor.getRaftActorContext().setCommitIndex(4);
 706                 followerActor.getRaftActorContext().setLastApplied(4);
 707                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 708
 709                 followerActor.waitForInitializeBehaviorComplete();
 710
 711
 712                 Follower follower = new Follower(followerActor.getRaftActorContext());
 713                 followerActor.setCurrentBehavior(follower);
 714                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 715
 716                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 717                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 718                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 719
 720                 // log has indices 0-5
 721                 assertEquals(6, followerActor.getReplicatedLog().size());
 722
 723                 //snapshot on 4
 724                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 725                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 726                                 new MockRaftActorContext.MockPayload("D")), 4);
 727
 728                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 729
 730                 assertEquals(6, followerActor.getReplicatedLog().size());
 731
 732                 //fake snapshot on index 6
 733                 List<ReplicatedLogEntry> entries =
 734                         Arrays.asList(
 735                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 736                                         new MockRaftActorContext.MockPayload("foo-6"))
 737                         );
 738                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 739                 assertEquals(7, followerActor.getReplicatedLog().size());
 740
 741                 //fake snapshot on index 7
 742                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 743
 744                 entries =
 745                         Arrays.asList(
 746                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 747                                         new MockRaftActorContext.MockPayload("foo-7"))
 748                         );
 749                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 750                 assertEquals(8, followerActor.getReplicatedLog().size());
 751
 752                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 753
 754
 755                 ByteString snapshotBytes = fromObject(Arrays.asList(
 756                         new MockRaftActorContext.MockPayload("foo-0"),
 757                         new MockRaftActorContext.MockPayload("foo-1"),
 758                         new MockRaftActorContext.MockPayload("foo-2"),
 759                         new MockRaftActorContext.MockPayload("foo-3"),
 760                         new MockRaftActorContext.MockPayload("foo-4")));
 761                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 762                 assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 763
 764                 // The commit is needed to complete the snapshot creation process
 765                 followerActor.getRaftActorContext().getSnapshotManager().commit(-1, -1);
 766
 767                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 768                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 769                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 770
 771                 entries =
 772                         Arrays.asList(
 773                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 774                                         new MockRaftActorContext.MockPayload("foo-7"))
 775                         );
 776                 // send an additional entry 8 with leaderCommit = 7
 777                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 778
 779                 // 7 and 8, as lastapplied is 7
 780                 assertEquals(2, followerActor.getReplicatedLog().size());
 781
 782             }
 783         };
 784     }
 785
 786     @Test
 787     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 788         new JavaTestKit(getSystem()) {
 789             {
 790                 String persistenceId = factory.generateActorId("leader-");
 791                 String follower1Id = factory.generateActorId("follower-");
 792                 String follower2Id = factory.generateActorId("follower-");
 793
 794                 ActorRef followerActor1 =
 795                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 796                 ActorRef followerActor2 =
 797                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 798
 799                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 800                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 801                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 802
 803                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 804
 805                 Map<String, String> peerAddresses = new HashMap<>();
 806                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 807                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 808
 809                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 810                         MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 811
 812                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 813                 leaderActor.getRaftActorContext().setCommitIndex(9);
 814                 leaderActor.getRaftActorContext().setLastApplied(9);
 815                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 816
 817                 leaderActor.waitForInitializeBehaviorComplete();
 818
 819                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 820                 leaderActor.setCurrentBehavior(leader);
 821                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 822
 823                 // create 5 entries in the log
 824                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 825                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 826
 827                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 828                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 829                 //setting replicatedToAllIndex = 9, for the log to clear
 830                 leader.setReplicatedToAllIndex(9);
 831                 assertEquals(5, leaderActor.getReplicatedLog().size());
 832                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 833
 834                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 835                 assertEquals(5, leaderActor.getReplicatedLog().size());
 836                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 837
 838                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 839                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 840                 assertEquals(5, leaderActor.getReplicatedLog().size());
 841                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 842
 843                 // simulate a real snapshot
 844                 leaderActor.onReceiveCommand(SendHeartBeat.INSTANCE);
 845                 assertEquals(5, leaderActor.getReplicatedLog().size());
 846                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 847                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 848                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 849
 850
 851                 //reply from a slow follower does not initiate a fake snapshot
 852                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 853                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 854
 855                 ByteString snapshotBytes = fromObject(Arrays.asList(
 856                         new MockRaftActorContext.MockPayload("foo-0"),
 857                         new MockRaftActorContext.MockPayload("foo-1"),
 858                         new MockRaftActorContext.MockPayload("foo-2"),
 859                         new MockRaftActorContext.MockPayload("foo-3"),
 860                         new MockRaftActorContext.MockPayload("foo-4")));
 861                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 862                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 863
 864                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 865
 866                 //reply from a slow follower after should not raise errors
 867                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 868                 assertEquals(0, leaderActor.getReplicatedLog().size());
 869             }
 870         };
 871     }
 872
 873     @Test
 874     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 875         new JavaTestKit(getSystem()) {{
 876             String persistenceId = factory.generateActorId("leader-");
 877             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 878             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 879             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 880             config.setSnapshotBatchCount(5);
 881
 882             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 883
 884             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 885
 886             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 887                     MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 888
 889             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 890             leaderActor.getRaftActorContext().setCommitIndex(3);
 891             leaderActor.getRaftActorContext().setLastApplied(3);
 892             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 893
 894             leaderActor.waitForInitializeBehaviorComplete();
 895             for(int i=0;i< 4;i++) {
 896                 leaderActor.getReplicatedLog()
 897                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 898                                 new MockRaftActorContext.MockPayload("A")));
 899             }
 900
 901             Leader leader = new Leader(leaderActor.getRaftActorContext());
 902             leaderActor.setCurrentBehavior(leader);
 903             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 904
 905             // Simulate an install snaphost to a follower.
 906             leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 907                     leaderActor.getReplicatedLog().last(), -1, "member1");
 908
 909             // Now send a CaptureSnapshotReply
 910             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 911
 912             // Trimming log in this scenario is a no-op
 913             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 914             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 915             assertEquals(-1, leader.getReplicatedToAllIndex());
 916
 917         }};
 918     }
 919
 920     @Test
 921     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 922         new JavaTestKit(getSystem()) {{
 923             String persistenceId = factory.generateActorId("leader-");
 924             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 925             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 926             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 927             config.setSnapshotBatchCount(5);
 928
 929             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 930
 931             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 932
 933             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 934                     MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 935
 936             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 937             leaderActor.getRaftActorContext().setCommitIndex(3);
 938             leaderActor.getRaftActorContext().setLastApplied(3);
 939             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 940             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 941
 942             leaderActor.waitForInitializeBehaviorComplete();
 943             Leader leader = new Leader(leaderActor.getRaftActorContext());
 944             leaderActor.setCurrentBehavior(leader);
 945             leader.setReplicatedToAllIndex(3);
 946             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 947
 948             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 949             leaderActor.persistData(mockActorRef, new MockIdentifier("x"),
 950                 new MockRaftActorContext.MockPayload("duh"));
 951
 952             // Now send a CaptureSnapshotReply
 953             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 954
 955             // Trimming log in this scenario is a no-op
 956             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 957             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 958             assertEquals(3, leader.getReplicatedToAllIndex());
 959
 960         }};
 961     }
 962
 963     @Test
 964     public void testSwitchBehavior(){
 965         String persistenceId = factory.generateActorId("leader-");
 966         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 967         config.setCustomRaftPolicyImplementationClass("org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 968         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 969         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 970         config.setSnapshotBatchCount(5);
 971
 972         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 973
 974         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 975
 976         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 977                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 978
 979         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 980
 981         leaderActor.waitForRecoveryComplete();
 982
 983         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 984
 985         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 986         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 987
 988         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 989
 990         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 991         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 992
 993         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 994
 995         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 996         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 997
 998         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 999
1000         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
1001         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
1002     }
1003
1004     public static ByteString fromObject(Object snapshot) throws Exception {
1005         ByteArrayOutputStream b = null;
1006         ObjectOutputStream o = null;
1007         try {
1008             b = new ByteArrayOutputStream();
1009             o = new ObjectOutputStream(b);
1010             o.writeObject(snapshot);
1011             byte[] snapshotBytes = b.toByteArray();
1012             return ByteString.copyFrom(snapshotBytes);
1013         } finally {
1014             if (o != null) {
1015                 o.flush();
1016                 o.close();
1017             }
1018             if (b != null) {
1019                 b.close();
1020             }
1021         }
1022     }
1023
1024     @Test
1025     public void testUpdateConfigParam() throws Exception {
1026         DefaultConfigParamsImpl emptyConfig = new DefaultConfigParamsImpl();
1027         String persistenceId = factory.generateActorId("follower-");
1028         ImmutableMap<String, String> peerAddresses =
1029             ImmutableMap.<String, String>builder().put("member1", "address").build();
1030         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
1031
1032         TestActorRef<MockRaftActor> actorRef = factory.createTestActor(
1033                 MockRaftActor.props(persistenceId, peerAddresses, emptyConfig, dataPersistenceProvider), persistenceId);
1034         MockRaftActor mockRaftActor = actorRef.underlyingActor();
1035         mockRaftActor.waitForInitializeBehaviorComplete();
1036
1037         RaftActorBehavior behavior = mockRaftActor.getCurrentBehavior();
1038         mockRaftActor.updateConfigParams(emptyConfig);
1039         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1040         assertEquals("Behavior State", RaftState.Follower,
1041             mockRaftActor.getCurrentBehavior().state());
1042
1043         DefaultConfigParamsImpl disableConfig = new DefaultConfigParamsImpl();
1044         disableConfig.setCustomRaftPolicyImplementationClass(
1045             "org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
1046         mockRaftActor.updateConfigParams(disableConfig);
1047         assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior());
1048         assertEquals("Behavior State", RaftState.Follower,
1049             mockRaftActor.getCurrentBehavior().state());
1050
1051         behavior = mockRaftActor.getCurrentBehavior();
1052         mockRaftActor.updateConfigParams(disableConfig);
1053         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1054         assertEquals("Behavior State", RaftState.Follower,
1055             mockRaftActor.getCurrentBehavior().state());
1056
1057         DefaultConfigParamsImpl defaultConfig = new DefaultConfigParamsImpl();
1058         defaultConfig.setCustomRaftPolicyImplementationClass(
1059             "org.opendaylight.controller.cluster.raft.policy.DefaultRaftPolicy");
1060         mockRaftActor.updateConfigParams(defaultConfig);
1061         assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior());
1062         assertEquals("Behavior State", RaftState.Follower,
1063             mockRaftActor.getCurrentBehavior().state());
1064
1065         behavior = mockRaftActor.getCurrentBehavior();
1066         mockRaftActor.updateConfigParams(defaultConfig);
1067         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1068         assertEquals("Behavior State", RaftState.Follower,
1069             mockRaftActor.getCurrentBehavior().state());
1070     }
1071
1072     @Test
1073     public void testGetSnapshot() throws Exception {
1074         TEST_LOG.info("testGetSnapshot starting");
1075
1076         JavaTestKit kit = new JavaTestKit(getSystem());
1077
1078         String persistenceId = factory.generateActorId("test-actor-");
1079         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1080         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1081
1082         long term = 3;
1083         long seqN = 1;
1084         InMemoryJournal.addEntry(persistenceId, seqN++, new UpdateElectionTerm(term, "member-1"));
1085         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 0,
1086                 new MockRaftActorContext.MockPayload("A")));
1087         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 1,
1088                 new MockRaftActorContext.MockPayload("B")));
1089         InMemoryJournal.addEntry(persistenceId, seqN++, new ApplyJournalEntries(1));
1090         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 2,
1091                 new MockRaftActorContext.MockPayload("C")));
1092
1093         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
1094                 ImmutableMap.<String, String>builder().put("member1", "address").build(), config).
1095                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1096         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1097
1098         mockRaftActor.waitForRecoveryComplete();
1099
1100         mockRaftActor.snapshotCohortDelegate = mock(RaftActorSnapshotCohort.class);
1101
1102         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1103
1104         ArgumentCaptor<ActorRef> replyActor = ArgumentCaptor.forClass(ActorRef.class);
1105         verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).createSnapshot(replyActor.capture());
1106
1107         byte[] stateSnapshot = new byte[]{1,2,3};
1108         replyActor.getValue().tell(new CaptureSnapshotReply(stateSnapshot), ActorRef.noSender());
1109
1110         GetSnapshotReply reply = kit.expectMsgClass(GetSnapshotReply.class);
1111
1112         assertEquals("getId", persistenceId, reply.getId());
1113         Snapshot replySnapshot = SerializationUtils.deserialize(reply.getSnapshot());
1114         assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm());
1115         assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor());
1116         assertEquals("getLastAppliedIndex", 1L, replySnapshot.getLastAppliedIndex());
1117         assertEquals("getLastAppliedTerm", term, replySnapshot.getLastAppliedTerm());
1118         assertEquals("getLastIndex", 2L, replySnapshot.getLastIndex());
1119         assertEquals("getLastTerm", term, replySnapshot.getLastTerm());
1120         assertArrayEquals("getState", stateSnapshot, replySnapshot.getState());
1121         assertEquals("getUnAppliedEntries size", 1, replySnapshot.getUnAppliedEntries().size());
1122         assertEquals("UnApplied entry index ", 2L, replySnapshot.getUnAppliedEntries().get(0).getIndex());
1123
1124         // Test with timeout
1125
1126         mockRaftActor.getSnapshotMessageSupport().setSnapshotReplyActorTimeout(Duration.create(200, TimeUnit.MILLISECONDS));
1127         reset(mockRaftActor.snapshotCohortDelegate);
1128
1129         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1130         Failure failure = kit.expectMsgClass(akka.actor.Status.Failure.class);
1131         assertEquals("Failure cause type", TimeoutException.class, failure.cause().getClass());
1132
1133         mockRaftActor.getSnapshotMessageSupport().setSnapshotReplyActorTimeout(Duration.create(30, TimeUnit.SECONDS));
1134
1135         // Test with persistence disabled.
1136
1137         mockRaftActor.setPersistence(false);
1138         reset(mockRaftActor.snapshotCohortDelegate);
1139
1140         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1141         reply = kit.expectMsgClass(GetSnapshotReply.class);
1142         verify(mockRaftActor.snapshotCohortDelegate, never()).createSnapshot(any(ActorRef.class));
1143
1144         assertEquals("getId", persistenceId, reply.getId());
1145         replySnapshot = SerializationUtils.deserialize(reply.getSnapshot());
1146         assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm());
1147         assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor());
1148         assertEquals("getLastAppliedIndex", -1L, replySnapshot.getLastAppliedIndex());
1149         assertEquals("getLastAppliedTerm", -1L, replySnapshot.getLastAppliedTerm());
1150         assertEquals("getLastIndex", -1L, replySnapshot.getLastIndex());
1151         assertEquals("getLastTerm", -1L, replySnapshot.getLastTerm());
1152         assertEquals("getState length", 0, replySnapshot.getState().length);
1153         assertEquals("getUnAppliedEntries size", 0, replySnapshot.getUnAppliedEntries().size());
1154
1155         TEST_LOG.info("testGetSnapshot ending");
1156     }
1157
1158     @Test
1159     public void testRestoreFromSnapshot() throws Exception {
1160         TEST_LOG.info("testRestoreFromSnapshot starting");
1161
1162         String persistenceId = factory.generateActorId("test-actor-");
1163         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1164         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1165
1166         List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
1167         snapshotUnappliedEntries.add(new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
1168                 new MockRaftActorContext.MockPayload("E")));
1169
1170         int snapshotLastApplied = 3;
1171         int snapshotLastIndex = 4;
1172
1173         List<MockPayload> state = Arrays.asList(
1174                 new MockRaftActorContext.MockPayload("A"),
1175                 new MockRaftActorContext.MockPayload("B"),
1176                 new MockRaftActorContext.MockPayload("C"),
1177                 new MockRaftActorContext.MockPayload("D"));
1178         ByteString stateBytes = fromObject(state);
1179
1180         Snapshot snapshot = Snapshot.create(stateBytes.toByteArray(), snapshotUnappliedEntries,
1181                 snapshotLastIndex, 1, snapshotLastApplied, 1, 1, "member-1");
1182
1183         InMemorySnapshotStore.addSnapshotSavedLatch(persistenceId);
1184
1185         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1186                 config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props().
1187                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1188         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1189
1190         mockRaftActor.waitForRecoveryComplete();
1191
1192         Snapshot savedSnapshot = InMemorySnapshotStore.waitForSavedSnapshot(persistenceId, Snapshot.class);
1193         assertEquals("getElectionTerm", snapshot.getElectionTerm(), savedSnapshot.getElectionTerm());
1194         assertEquals("getElectionVotedFor", snapshot.getElectionVotedFor(), savedSnapshot.getElectionVotedFor());
1195         assertEquals("getLastAppliedIndex", snapshot.getLastAppliedIndex(), savedSnapshot.getLastAppliedIndex());
1196         assertEquals("getLastAppliedTerm", snapshot.getLastAppliedTerm(), savedSnapshot.getLastAppliedTerm());
1197         assertEquals("getLastIndex", snapshot.getLastIndex(), savedSnapshot.getLastIndex());
1198         assertEquals("getLastTerm", snapshot.getLastTerm(), savedSnapshot.getLastTerm());
1199         assertArrayEquals("getState", snapshot.getState(), savedSnapshot.getState());
1200         assertEquals("getUnAppliedEntries", snapshot.getUnAppliedEntries(), savedSnapshot.getUnAppliedEntries());
1201
1202         verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).applySnapshot(any(byte[].class));
1203
1204         RaftActorContext context = mockRaftActor.getRaftActorContext();
1205         assertEquals("Journal log size", 1, context.getReplicatedLog().size());
1206         assertEquals("Last index", snapshotLastIndex, context.getReplicatedLog().lastIndex());
1207         assertEquals("Last applied", snapshotLastApplied, context.getLastApplied());
1208         assertEquals("Commit index", snapshotLastApplied, context.getCommitIndex());
1209         assertEquals("Recovered state", state, mockRaftActor.getState());
1210         assertEquals("Current term", 1L, context.getTermInformation().getCurrentTerm());
1211         assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor());
1212
1213         // Test with data persistence disabled
1214
1215         snapshot = Snapshot.create(new byte[0], Collections.<ReplicatedLogEntry>emptyList(),
1216                 -1, -1, -1, -1, 5, "member-1");
1217
1218         persistenceId = factory.generateActorId("test-actor-");
1219
1220         raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1221                 config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).
1222                 persistent(Optional.of(Boolean.FALSE)).props().
1223                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1224         mockRaftActor = raftActorRef.underlyingActor();
1225
1226         mockRaftActor.waitForRecoveryComplete();
1227         assertEquals("snapshot committed", true,
1228                 Uninterruptibles.awaitUninterruptibly(mockRaftActor.snapshotCommitted, 5, TimeUnit.SECONDS));
1229
1230         context = mockRaftActor.getRaftActorContext();
1231         assertEquals("Current term", 5L, context.getTermInformation().getCurrentTerm());
1232         assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor());
1233
1234         TEST_LOG.info("testRestoreFromSnapshot ending");
1235     }
1236
1237     @Test
1238     public void testRestoreFromSnapshotWithRecoveredData() throws Exception {
1239         TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData starting");
1240
1241         String persistenceId = factory.generateActorId("test-actor-");
1242         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1243         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1244
1245         List<MockPayload> state = Arrays.asList(new MockRaftActorContext.MockPayload("A"));
1246         Snapshot snapshot = Snapshot.create(fromObject(state).toByteArray(), Arrays.<ReplicatedLogEntry>asList(),
1247                 5, 2, 5, 2, 2, "member-1");
1248
1249         InMemoryJournal.addEntry(persistenceId, 1, new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
1250                 new MockRaftActorContext.MockPayload("B")));
1251
1252         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1253                 config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props().
1254                     withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1255         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1256
1257         mockRaftActor.waitForRecoveryComplete();
1258
1259         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
1260         verify(mockRaftActor.snapshotCohortDelegate, never()).applySnapshot(any(byte[].class));
1261
1262         RaftActorContext context = mockRaftActor.getRaftActorContext();
1263         assertEquals("Journal log size", 1, context.getReplicatedLog().size());
1264         assertEquals("Last index", 0, context.getReplicatedLog().lastIndex());
1265         assertEquals("Last applied", -1, context.getLastApplied());
1266         assertEquals("Commit index", -1, context.getCommitIndex());
1267         assertEquals("Current term", 0, context.getTermInformation().getCurrentTerm());
1268         assertEquals("Voted for", null, context.getTermInformation().getVotedFor());
1269
1270         TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData ending");
1271     }
1272
1273     @Test
1274     public void testNonVotingOnRecovery() throws Exception {
1275         TEST_LOG.info("testNonVotingOnRecovery starting");
1276
1277         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1278         config.setElectionTimeoutFactor(1);
1279         config.setHeartBeatInterval(FiniteDuration.create(1, TimeUnit.MILLISECONDS));
1280
1281         String persistenceId = factory.generateActorId("test-actor-");
1282         InMemoryJournal.addEntry(persistenceId, 1,  new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
1283                 new ServerConfigurationPayload(Arrays.asList(new ServerInfo(persistenceId, false)))));
1284
1285         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1286                 config(config).props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1287         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1288
1289         mockRaftActor.waitForInitializeBehaviorComplete();
1290
1291         // Sleep a bit and verify it didn't get an election timeout and schedule an election.
1292
1293         Uninterruptibles.sleepUninterruptibly(400, TimeUnit.MILLISECONDS);
1294         assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
1295
1296         TEST_LOG.info("testNonVotingOnRecovery ending");
1297     }
1298
1299     @Test
1300     public void testLeaderTransitioning() throws Exception {
1301         TEST_LOG.info("testLeaderTransitioning starting");
1302
1303         TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
1304                 Props.create(MessageCollectorActor.class));
1305
1306         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1307         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1308
1309         String persistenceId = factory.generateActorId("test-actor-");
1310
1311         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).
1312                 config(config).roleChangeNotifier(notifierActor).props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1313         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1314
1315         mockRaftActor.waitForInitializeBehaviorComplete();
1316
1317         raftActorRef.tell(new AppendEntries(1L, "leader", 0L, 1L, Collections.<ReplicatedLogEntry>emptyList(),
1318                 0L, -1L, (short)1), ActorRef.noSender());
1319         LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
1320                 notifierActor, LeaderStateChanged.class);
1321         assertEquals("getLeaderId", "leader", leaderStateChange.getLeaderId());
1322
1323         MessageCollectorActor.clearMessages(notifierActor);
1324
1325         raftActorRef.tell(LeaderTransitioning.INSTANCE, ActorRef.noSender());
1326
1327         leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
1328         assertEquals("getMemberId", persistenceId, leaderStateChange.getMemberId());
1329         assertEquals("getLeaderId", null, leaderStateChange.getLeaderId());
1330
1331         TEST_LOG.info("testLeaderTransitioning ending");
1332     }
1333 }