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
  29 import akka.actor.ActorRef;
  30 import akka.actor.PoisonPill;
  31 import akka.actor.Props;
  32 import akka.actor.Status.Failure;
  33 import akka.actor.Terminated;
  34 import akka.dispatch.Dispatchers;
  35 import akka.japi.Procedure;
  36 import akka.persistence.SaveSnapshotFailure;
  37 import akka.persistence.SaveSnapshotSuccess;
  38 import akka.persistence.SnapshotMetadata;
  39 import akka.persistence.SnapshotOffer;
  40 import akka.testkit.JavaTestKit;
  41 import akka.testkit.TestActorRef;
  42 import com.google.common.base.Optional;
  43 import com.google.common.collect.ImmutableMap;
  44 import com.google.common.util.concurrent.Uninterruptibles;
  45 import com.google.protobuf.ByteString;
  46 import java.io.ByteArrayOutputStream;
  47 import java.io.ObjectOutputStream;
  48 import java.util.ArrayList;
  49 import java.util.Arrays;
  50 import java.util.Collections;
  51 import java.util.HashMap;
  52 import java.util.List;
  53 import java.util.Map;
  54 import java.util.concurrent.TimeUnit;
  55 import java.util.concurrent.TimeoutException;
  56 import org.apache.commons.lang3.SerializationUtils;
  57 import org.junit.After;
  58 import org.junit.Before;
  59 import org.junit.Test;
  60 import org.mockito.ArgumentCaptor;
  61 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  62 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  63 import org.opendaylight.controller.cluster.PersistentDataProvider;
  64 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  65 import org.opendaylight.controller.cluster.notifications.RoleChanged;
  66 import org.opendaylight.controller.cluster.raft.MockRaftActorContext.MockPayload;
  67 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  68 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  69 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  70 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  71 import org.opendaylight.controller.cluster.raft.base.messages.LeaderTransitioning;
  72 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  73 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  74 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  75 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  76 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  77 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshot;
  78 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshotReply;
  79 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  80 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
  81 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  82 import org.opendaylight.controller.cluster.raft.persisted.DeleteEntries;
  83 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  84 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  85 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
  86 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  87 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  88 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  89 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  90 import org.opendaylight.yangtools.concepts.Identifier;
  91 import org.slf4j.Logger;
  92 import org.slf4j.LoggerFactory;
  93 import scala.concurrent.duration.Duration;
  94 import scala.concurrent.duration.FiniteDuration;
  95
  96 public class RaftActorTest extends AbstractActorTest {
  97
  98     static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class);
  99
 100     private TestActorFactory factory;
 101
 102     @Before
 103     public void setUp() {
 104         factory = new TestActorFactory(getSystem());
 105     }
 106
 107     @After
 108     public void tearDown() throws Exception {
 109         factory.close();
 110         InMemoryJournal.clear();
 111         InMemorySnapshotStore.clear();
 112     }
 113
 114     @Test
 115     public void testConstruction() {
 116         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
 117     }
 118
 119     @Test
 120     public void testFindLeaderWhenLeaderIsSelf() {
 121         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
 122         kit.waitUntilLeader();
 123     }
 124
 125
 126     @Test
 127     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
 128         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting");
 129
 130         JavaTestKit kit = new JavaTestKit(getSystem());
 131         String persistenceId = factory.generateActorId("follower-");
 132
 133         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 134
 135         // Set the heartbeat interval high to essentially disable election otherwise the test
 136         // may fail if the actor is switched to Leader and the commitIndex is set to the last
 137         // log entry.
 138         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 139
 140         ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder()
 141                 .put("member1", "address").build();
 142         ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 143                 peerAddresses, config), persistenceId);
 144
 145         kit.watch(followerActor);
 146
 147         List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 148         ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 149                 new MockRaftActorContext.MockPayload("E"));
 150         snapshotUnappliedEntries.add(entry1);
 151
 152         int lastAppliedDuringSnapshotCapture = 3;
 153         int lastIndexDuringSnapshotCapture = 4;
 154
 155         // 4 messages as part of snapshot, which are applied to state
 156         ByteString snapshotBytes = fromObject(Arrays.asList(
 157                 new MockRaftActorContext.MockPayload("A"),
 158                 new MockRaftActorContext.MockPayload("B"),
 159                 new MockRaftActorContext.MockPayload("C"),
 160                 new MockRaftActorContext.MockPayload("D")));
 161
 162         Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 163                 snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 164                 lastAppliedDuringSnapshotCapture, 1);
 165         InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 166
 167         // add more entries after snapshot is taken
 168         List<ReplicatedLogEntry> entries = new ArrayList<>();
 169         ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 170                 new MockRaftActorContext.MockPayload("F", 2));
 171         ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 172                 new MockRaftActorContext.MockPayload("G", 3));
 173         ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 174                 new MockRaftActorContext.MockPayload("H", 4));
 175         entries.add(entry2);
 176         entries.add(entry3);
 177         entries.add(entry4);
 178
 179         final int lastAppliedToState = 5;
 180         final int lastIndex = 7;
 181
 182         InMemoryJournal.addEntry(persistenceId, 5, entry2);
 183         // 2 entries are applied to state besides the 4 entries in snapshot
 184         InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 185         InMemoryJournal.addEntry(persistenceId, 7, entry3);
 186         InMemoryJournal.addEntry(persistenceId, 8, entry4);
 187
 188         // kill the actor
 189         followerActor.tell(PoisonPill.getInstance(), null);
 190         kit.expectMsgClass(JavaTestKit.duration("5 seconds"), Terminated.class);
 191
 192         kit.unwatch(followerActor);
 193
 194         //reinstate the actor
 195         TestActorRef<MockRaftActor> ref = factory.createTestActor(
 196                 MockRaftActor.props(persistenceId, peerAddresses, config));
 197
 198         MockRaftActor mockRaftActor = ref.underlyingActor();
 199
 200         mockRaftActor.waitForRecoveryComplete();
 201
 202         RaftActorContext context = mockRaftActor.getRaftActorContext();
 203         assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 204                 context.getReplicatedLog().size());
 205         assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 206         assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 207         assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 208         assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 209         assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 210
 211         mockRaftActor.waitForInitializeBehaviorComplete();
 212
 213         assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 214
 215         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending");
 216     }
 217
 218     @Test
 219     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 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     @Test
 240     public void testUpdateElectionTermPersistedWithPersistenceDisabled() throws Exception {
 241         final JavaTestKit kit = 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         final UpdateElectionTerm updateEntry = entries.get(0);
 258
 259         factory.killActor(ref, kit);
 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()).withDispatcher(Dispatchers.DefaultDispatcherId()),
 265                 factory.generateActorId("follower-"));
 266
 267         MockRaftActor actor = ref.underlyingActor();
 268         actor.waitForRecoveryComplete();
 269
 270         RaftActorContext newContext = actor.getRaftActorContext();
 271         assertEquals("electionTerm", updateEntry.getCurrentTerm(),
 272                 newContext.getTermInformation().getCurrentTerm());
 273         assertEquals("votedFor", updateEntry.getVotedFor(), newContext.getTermInformation().getVotedFor());
 274
 275         entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 276         assertEquals("UpdateElectionTerm entries", 1, entries.size());
 277     }
 278
 279     @Test
 280     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 281         String persistenceId = factory.generateActorId("leader-");
 282
 283         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 284
 285         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 286
 287         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 288                 Collections.<String, String>emptyMap(), config), persistenceId);
 289
 290         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 291
 292         // Wait for akka's recovery to complete so it doesn't interfere.
 293         mockRaftActor.waitForRecoveryComplete();
 294
 295         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 296         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 297
 298         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 299         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 300         mockRaftActor.handleRecover(snapshotOffer);
 301
 302         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 303                 1, new MockRaftActorContext.MockPayload("1", 5));
 304         mockRaftActor.handleRecover(logEntry);
 305
 306         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 307         mockRaftActor.handleRecover(applyJournalEntries);
 308
 309         DeleteEntries deleteEntries = new DeleteEntries(1);
 310         mockRaftActor.handleRecover(deleteEntries);
 311
 312         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 313         mockRaftActor.handleRecover(updateElectionTerm);
 314
 315         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer), any(PersistentDataProvider.class));
 316         verify(mockSupport).handleRecoveryMessage(same(logEntry), any(PersistentDataProvider.class));
 317         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries), any(PersistentDataProvider.class));
 318         verify(mockSupport).handleRecoveryMessage(same(deleteEntries), any(PersistentDataProvider.class));
 319         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm), any(PersistentDataProvider.class));
 320     }
 321
 322     @Test
 323     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 324         String persistenceId = factory.generateActorId("leader-");
 325
 326         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 327
 328         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 329
 330         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 331
 332         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId)
 333                 .config(config).snapshotMessageSupport(mockSupport).props());
 334
 335         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 336
 337         // Wait for akka's recovery to complete so it doesn't interfere.
 338         mockRaftActor.waitForRecoveryComplete();
 339
 340         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 341         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class));
 342         mockRaftActor.handleCommand(applySnapshot);
 343
 344         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 345         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class));
 346         mockRaftActor.handleCommand(captureSnapshot);
 347
 348         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 349         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class));
 350         mockRaftActor.handleCommand(captureSnapshotReply);
 351
 352         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(new SnapshotMetadata("", 0L, 0L));
 353         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class));
 354         mockRaftActor.handleCommand(saveSnapshotSuccess);
 355
 356         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(new SnapshotMetadata("", 0L, 0L),
 357                 new Throwable());
 358         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class));
 359         mockRaftActor.handleCommand(saveSnapshotFailure);
 360
 361         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT),
 362                 any(ActorRef.class));
 363         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 364
 365         doReturn(true).when(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class));
 366         mockRaftActor.handleCommand(GetSnapshot.INSTANCE);
 367
 368         verify(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class));
 369         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class));
 370         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class));
 371         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class));
 372         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class));
 373         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT),
 374                 any(ActorRef.class));
 375         verify(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class));
 376     }
 377
 378     @SuppressWarnings("unchecked")
 379     @Test
 380     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 381         String persistenceId = factory.generateActorId("leader-");
 382
 383         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 384
 385         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 386
 387         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 388
 389         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 390                 Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId);
 391
 392         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 393
 394         mockRaftActor.waitForInitializeBehaviorComplete();
 395
 396         mockRaftActor.waitUntilLeader();
 397
 398         mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 399
 400         verify(dataPersistenceProvider).persistAsync(any(ApplyJournalEntries.class), any(Procedure.class));
 401     }
 402
 403     @Test
 404     public void testApplyState() throws Exception {
 405         String persistenceId = factory.generateActorId("leader-");
 406
 407         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 408
 409         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 410
 411         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 412
 413         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 414                 Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId);
 415
 416         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 417
 418         mockRaftActor.waitForInitializeBehaviorComplete();
 419
 420         ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 421                 new MockRaftActorContext.MockPayload("F"));
 422
 423         final Identifier id = new MockIdentifier("apply-state");
 424         mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, id, entry));
 425
 426         verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq(id), anyObject());
 427     }
 428
 429     @Test
 430     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 431         TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 432                 Props.create(MessageCollectorActor.class));
 433         MessageCollectorActor.waitUntilReady(notifierActor);
 434
 435         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 436         long heartBeatInterval = 100;
 437         config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 438         config.setElectionTimeoutFactor(20);
 439
 440         String persistenceId = factory.generateActorId("notifier-");
 441
 442         final TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder()
 443                 .id(persistenceId).config(config).roleChangeNotifier(notifierActor).dataPersistenceProvider(
 444                         new NonPersistentDataProvider()).props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 445                 persistenceId);
 446
 447         List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 448
 449
 450         // check if the notifier got a role change from null to Follower
 451         RoleChanged raftRoleChanged = matches.get(0);
 452         assertEquals(persistenceId, raftRoleChanged.getMemberId());
 453         assertNull(raftRoleChanged.getOldRole());
 454         assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 455
 456         // check if the notifier got a role change from Follower to Candidate
 457         raftRoleChanged = matches.get(1);
 458         assertEquals(persistenceId, raftRoleChanged.getMemberId());
 459         assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 460         assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 461
 462         // check if the notifier got a role change from Candidate to Leader
 463         raftRoleChanged = matches.get(2);
 464         assertEquals(persistenceId, raftRoleChanged.getMemberId());
 465         assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 466         assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 467
 468         LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 469                 notifierActor, LeaderStateChanged.class);
 470
 471         assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 472         assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 473
 474         notifierActor.underlyingActor().clear();
 475
 476         MockRaftActor raftActor = raftActorRef.underlyingActor();
 477         final String newLeaderId = "new-leader";
 478         final short newLeaderVersion = 6;
 479         Follower follower = new Follower(raftActor.getRaftActorContext()) {
 480             @Override
 481             public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 482                 setLeaderId(newLeaderId);
 483                 setLeaderPayloadVersion(newLeaderVersion);
 484                 return this;
 485             }
 486         };
 487
 488         raftActor.newBehavior(follower);
 489
 490         leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 491         assertEquals(persistenceId, leaderStateChange.getMemberId());
 492         assertEquals(null, leaderStateChange.getLeaderId());
 493
 494         raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 495         assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 496         assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 497
 498         notifierActor.underlyingActor().clear();
 499
 500         raftActor.handleCommand("any");
 501
 502         leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 503         assertEquals(persistenceId, leaderStateChange.getMemberId());
 504         assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 505         assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 506
 507         notifierActor.underlyingActor().clear();
 508
 509         raftActor.handleCommand("any");
 510
 511         Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 512         leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 513         assertNull(leaderStateChange);
 514     }
 515
 516     @Test
 517     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 518         ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 519         MessageCollectorActor.waitUntilReady(notifierActor);
 520
 521         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 522         long heartBeatInterval = 100;
 523         config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 524         config.setElectionTimeoutFactor(1);
 525
 526         String persistenceId = factory.generateActorId("notifier-");
 527
 528         factory.createActor(MockRaftActor.builder().id(persistenceId)
 529                 .peerAddresses(ImmutableMap.of("leader", "fake/path"))
 530                 .config(config).roleChangeNotifier(notifierActor).props());
 531
 532         List<RoleChanged> matches =  null;
 533         for (int i = 0; i < 5000 / heartBeatInterval; i++) {
 534             matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 535             assertNotNull(matches);
 536             if (matches.size() == 3) {
 537                 break;
 538             }
 539             Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 540         }
 541
 542         assertNotNull(matches);
 543         assertEquals(2, matches.size());
 544
 545         // check if the notifier got a role change from null to Follower
 546         RoleChanged raftRoleChanged = matches.get(0);
 547         assertEquals(persistenceId, raftRoleChanged.getMemberId());
 548         assertNull(raftRoleChanged.getOldRole());
 549         assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 550
 551         // check if the notifier got a role change from Follower to Candidate
 552         raftRoleChanged = matches.get(1);
 553         assertEquals(persistenceId, raftRoleChanged.getMemberId());
 554         assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 555         assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 556     }
 557
 558     @Test
 559     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 560         final String persistenceId = factory.generateActorId("leader-");
 561         final String follower1Id = factory.generateActorId("follower-");
 562
 563         ActorRef followerActor1 =
 564                 factory.createActor(Props.create(MessageCollectorActor.class));
 565
 566         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 567         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 568         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 569
 570         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 571
 572         Map<String, String> peerAddresses = new HashMap<>();
 573         peerAddresses.put(follower1Id, followerActor1.path().toString());
 574
 575         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 576                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 577
 578         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 579
 580         leaderActor.getRaftActorContext().setCommitIndex(4);
 581         leaderActor.getRaftActorContext().setLastApplied(4);
 582         leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 583
 584         leaderActor.waitForInitializeBehaviorComplete();
 585
 586         // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 587
 588         Leader leader = new Leader(leaderActor.getRaftActorContext());
 589         leaderActor.setCurrentBehavior(leader);
 590         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 591
 592         MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 593         leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 594
 595         assertEquals(8, leaderActor.getReplicatedLog().size());
 596
 597         leaderActor.getRaftActorContext().getSnapshotManager().capture(
 598                 new MockRaftActorContext.MockReplicatedLogEntry(1, 6, new MockRaftActorContext.MockPayload("x")), 4);
 599
 600         verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 601
 602         assertEquals(8, leaderActor.getReplicatedLog().size());
 603
 604         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 605         //fake snapshot on index 5
 606         leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 607
 608         assertEquals(8, leaderActor.getReplicatedLog().size());
 609
 610         //fake snapshot on index 6
 611         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 612         leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 613         assertEquals(8, leaderActor.getReplicatedLog().size());
 614
 615         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 616
 617         assertEquals(8, leaderActor.getReplicatedLog().size());
 618
 619         ByteString snapshotBytes = fromObject(Arrays.asList(
 620                 new MockRaftActorContext.MockPayload("foo-0"),
 621                 new MockRaftActorContext.MockPayload("foo-1"),
 622                 new MockRaftActorContext.MockPayload("foo-2"),
 623                 new MockRaftActorContext.MockPayload("foo-3"),
 624                 new MockRaftActorContext.MockPayload("foo-4")));
 625
 626         leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 627                 Runtime.getRuntime().totalMemory());
 628
 629         assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 630
 631         // The commit is needed to complete the snapshot creation process
 632         leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, -1);
 633
 634         // capture snapshot reply should remove the snapshotted entries only
 635         assertEquals(3, leaderActor.getReplicatedLog().size());
 636         assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 637
 638         // add another non-replicated entry
 639         leaderActor.getReplicatedLog().append(
 640                 new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 641
 642         //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 643         leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 644         assertEquals(2, leaderActor.getReplicatedLog().size());
 645         assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 646     }
 647
 648     @Test
 649     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 650         final String persistenceId = factory.generateActorId("follower-");
 651         final String leaderId = factory.generateActorId("leader-");
 652
 653
 654         ActorRef leaderActor1 =
 655                 factory.createActor(Props.create(MessageCollectorActor.class));
 656
 657         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 658         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 659         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 660
 661         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 662
 663         Map<String, String> peerAddresses = new HashMap<>();
 664         peerAddresses.put(leaderId, leaderActor1.path().toString());
 665
 666         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 667                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 668
 669         MockRaftActor followerActor = mockActorRef.underlyingActor();
 670         followerActor.getRaftActorContext().setCommitIndex(4);
 671         followerActor.getRaftActorContext().setLastApplied(4);
 672         followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 673
 674         followerActor.waitForInitializeBehaviorComplete();
 675
 676
 677         Follower follower = new Follower(followerActor.getRaftActorContext());
 678         followerActor.setCurrentBehavior(follower);
 679         assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 680
 681         // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 682         MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 683         followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 684
 685         // log has indices 0-5
 686         assertEquals(6, followerActor.getReplicatedLog().size());
 687
 688         //snapshot on 4
 689         followerActor.getRaftActorContext().getSnapshotManager().capture(
 690                 new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 691                         new MockRaftActorContext.MockPayload("D")), 4);
 692
 693         verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 694
 695         assertEquals(6, followerActor.getReplicatedLog().size());
 696
 697         //fake snapshot on index 6
 698         List<ReplicatedLogEntry> entries =
 699                 Arrays.asList(
 700                         (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 701                                 new MockRaftActorContext.MockPayload("foo-6"))
 702                         );
 703         followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 704         assertEquals(7, followerActor.getReplicatedLog().size());
 705
 706         //fake snapshot on index 7
 707         assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 708
 709         entries =
 710                 Arrays.asList(
 711                         (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 712                                 new MockRaftActorContext.MockPayload("foo-7"))
 713                         );
 714         followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 715         assertEquals(8, followerActor.getReplicatedLog().size());
 716
 717         assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 718
 719
 720         ByteString snapshotBytes = fromObject(Arrays.asList(
 721                 new MockRaftActorContext.MockPayload("foo-0"),
 722                 new MockRaftActorContext.MockPayload("foo-1"),
 723                 new MockRaftActorContext.MockPayload("foo-2"),
 724                 new MockRaftActorContext.MockPayload("foo-3"),
 725                 new MockRaftActorContext.MockPayload("foo-4")));
 726         followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 727         assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 728
 729         // The commit is needed to complete the snapshot creation process
 730         followerActor.getRaftActorContext().getSnapshotManager().commit(-1, -1);
 731
 732         // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 733         assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 734         assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 735
 736         entries =
 737                 Arrays.asList(
 738                         (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 739                                 new MockRaftActorContext.MockPayload("foo-7"))
 740                         );
 741         // send an additional entry 8 with leaderCommit = 7
 742         followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 743
 744         // 7 and 8, as lastapplied is 7
 745         assertEquals(2, followerActor.getReplicatedLog().size());
 746     }
 747
 748     @Test
 749     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 750         final String persistenceId = factory.generateActorId("leader-");
 751         final String follower1Id = factory.generateActorId("follower-");
 752         final String follower2Id = factory.generateActorId("follower-");
 753
 754         final ActorRef followerActor1 = factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 755         final ActorRef followerActor2 = factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 756
 757         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 758         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 759         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 760
 761         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 762
 763         Map<String, String> peerAddresses = new HashMap<>();
 764         peerAddresses.put(follower1Id, followerActor1.path().toString());
 765         peerAddresses.put(follower2Id, followerActor2.path().toString());
 766
 767         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 768                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 769
 770         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 771         leaderActor.getRaftActorContext().setCommitIndex(9);
 772         leaderActor.getRaftActorContext().setLastApplied(9);
 773         leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 774
 775         leaderActor.waitForInitializeBehaviorComplete();
 776
 777         Leader leader = new Leader(leaderActor.getRaftActorContext());
 778         leaderActor.setCurrentBehavior(leader);
 779         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 780
 781         // create 5 entries in the log
 782         MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 783         leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 784
 785         //set the snapshot index to 4 , 0 to 4 are snapshotted
 786         leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 787         //setting replicatedToAllIndex = 9, for the log to clear
 788         leader.setReplicatedToAllIndex(9);
 789         assertEquals(5, leaderActor.getReplicatedLog().size());
 790         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 791
 792         leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 793         assertEquals(5, leaderActor.getReplicatedLog().size());
 794         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 795
 796         // set the 2nd follower nextIndex to 1 which has been snapshotted
 797         leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 798         assertEquals(5, leaderActor.getReplicatedLog().size());
 799         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 800
 801         // simulate a real snapshot
 802         leaderActor.onReceiveCommand(SendHeartBeat.INSTANCE);
 803         assertEquals(5, leaderActor.getReplicatedLog().size());
 804         assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 805                 leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId()),
 806                 RaftState.Leader, leaderActor.getCurrentBehavior().state());
 807
 808
 809         //reply from a slow follower does not initiate a fake snapshot
 810         leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 811         assertEquals("Fake snapshot should not happen when Initiate is in progress", 5,
 812                 leaderActor.getReplicatedLog().size());
 813
 814         ByteString snapshotBytes = fromObject(Arrays.asList(
 815                 new MockRaftActorContext.MockPayload("foo-0"),
 816                 new MockRaftActorContext.MockPayload("foo-1"),
 817                 new MockRaftActorContext.MockPayload("foo-2"),
 818                 new MockRaftActorContext.MockPayload("foo-3"),
 819                 new MockRaftActorContext.MockPayload("foo-4")));
 820         leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 821         assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 822
 823         assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0,
 824                 leaderActor.getReplicatedLog().size());
 825
 826         //reply from a slow follower after should not raise errors
 827         leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 828         assertEquals(0, leaderActor.getReplicatedLog().size());
 829     }
 830
 831     @Test
 832     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 833         String persistenceId = factory.generateActorId("leader-");
 834         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 835         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 836         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 837         config.setSnapshotBatchCount(5);
 838
 839         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 840
 841         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 842
 843         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 844                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 845
 846         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 847         leaderActor.getRaftActorContext().setCommitIndex(3);
 848         leaderActor.getRaftActorContext().setLastApplied(3);
 849         leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 850
 851         leaderActor.waitForInitializeBehaviorComplete();
 852         for (int i = 0; i < 4; i++) {
 853             leaderActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 854                     new MockRaftActorContext.MockPayload("A")));
 855         }
 856
 857         Leader leader = new Leader(leaderActor.getRaftActorContext());
 858         leaderActor.setCurrentBehavior(leader);
 859         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 860
 861         // Simulate an install snaphost to a follower.
 862         leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 863                 leaderActor.getReplicatedLog().last(), -1, "member1");
 864
 865         // Now send a CaptureSnapshotReply
 866         mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 867
 868         // Trimming log in this scenario is a no-op
 869         assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 870         assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 871         assertEquals(-1, leader.getReplicatedToAllIndex());
 872     }
 873
 874     @Test
 875     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 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         leaderActor.getReplicatedLog().setSnapshotIndex(3);
 894
 895         leaderActor.waitForInitializeBehaviorComplete();
 896         Leader leader = new Leader(leaderActor.getRaftActorContext());
 897         leaderActor.setCurrentBehavior(leader);
 898         leader.setReplicatedToAllIndex(3);
 899         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 900
 901         // Persist another entry (this will cause a CaptureSnapshot to be triggered
 902         leaderActor.persistData(mockActorRef, new MockIdentifier("x"),
 903                 new MockRaftActorContext.MockPayload("duh"));
 904
 905         // Now send a CaptureSnapshotReply
 906         mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 907
 908         // Trimming log in this scenario is a no-op
 909         assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 910         assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 911         assertEquals(3, leader.getReplicatedToAllIndex());
 912     }
 913
 914     @Test
 915     public void testSwitchBehavior() {
 916         String persistenceId = factory.generateActorId("leader-");
 917         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 918         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 919         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 920         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 921         config.setSnapshotBatchCount(5);
 922
 923         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 924
 925         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 926
 927         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 928                 MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId);
 929
 930         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 931
 932         leaderActor.waitForRecoveryComplete();
 933
 934         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 935
 936         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 937         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 938
 939         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 940
 941         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 942         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 943
 944         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 945
 946         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 947         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 948
 949         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 950
 951         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 952         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 953     }
 954
 955     public static ByteString fromObject(Object snapshot) throws Exception {
 956         ByteArrayOutputStream bos = null;
 957         ObjectOutputStream os = null;
 958         try {
 959             bos = new ByteArrayOutputStream();
 960             os = new ObjectOutputStream(bos);
 961             os.writeObject(snapshot);
 962             byte[] snapshotBytes = bos.toByteArray();
 963             return ByteString.copyFrom(snapshotBytes);
 964         } finally {
 965             if (os != null) {
 966                 os.flush();
 967                 os.close();
 968             }
 969             if (bos != null) {
 970                 bos.close();
 971             }
 972         }
 973     }
 974
 975     @Test
 976     public void testUpdateConfigParam() throws Exception {
 977         DefaultConfigParamsImpl emptyConfig = new DefaultConfigParamsImpl();
 978         String persistenceId = factory.generateActorId("follower-");
 979         ImmutableMap<String, String> peerAddresses =
 980             ImmutableMap.<String, String>builder().put("member1", "address").build();
 981         DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 982
 983         TestActorRef<MockRaftActor> actorRef = factory.createTestActor(
 984                 MockRaftActor.props(persistenceId, peerAddresses, emptyConfig, dataPersistenceProvider), persistenceId);
 985         MockRaftActor mockRaftActor = actorRef.underlyingActor();
 986         mockRaftActor.waitForInitializeBehaviorComplete();
 987
 988         RaftActorBehavior behavior = mockRaftActor.getCurrentBehavior();
 989         mockRaftActor.updateConfigParams(emptyConfig);
 990         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
 991         assertEquals("Behavior State", RaftState.Follower,
 992             mockRaftActor.getCurrentBehavior().state());
 993
 994         DefaultConfigParamsImpl disableConfig = new DefaultConfigParamsImpl();
 995         disableConfig.setCustomRaftPolicyImplementationClass(
 996             "org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 997         mockRaftActor.updateConfigParams(disableConfig);
 998         assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior());
 999         assertEquals("Behavior State", RaftState.Follower,
1000             mockRaftActor.getCurrentBehavior().state());
1001
1002         behavior = mockRaftActor.getCurrentBehavior();
1003         mockRaftActor.updateConfigParams(disableConfig);
1004         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1005         assertEquals("Behavior State", RaftState.Follower,
1006             mockRaftActor.getCurrentBehavior().state());
1007
1008         DefaultConfigParamsImpl defaultConfig = new DefaultConfigParamsImpl();
1009         defaultConfig.setCustomRaftPolicyImplementationClass(
1010             "org.opendaylight.controller.cluster.raft.policy.DefaultRaftPolicy");
1011         mockRaftActor.updateConfigParams(defaultConfig);
1012         assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior());
1013         assertEquals("Behavior State", RaftState.Follower,
1014             mockRaftActor.getCurrentBehavior().state());
1015
1016         behavior = mockRaftActor.getCurrentBehavior();
1017         mockRaftActor.updateConfigParams(defaultConfig);
1018         assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior());
1019         assertEquals("Behavior State", RaftState.Follower,
1020             mockRaftActor.getCurrentBehavior().state());
1021     }
1022
1023     @Test
1024     public void testGetSnapshot() throws Exception {
1025         TEST_LOG.info("testGetSnapshot starting");
1026
1027         final JavaTestKit kit = new JavaTestKit(getSystem());
1028
1029         String persistenceId = factory.generateActorId("test-actor-");
1030         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1031         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1032
1033         long term = 3;
1034         long seqN = 1;
1035         InMemoryJournal.addEntry(persistenceId, seqN++, new UpdateElectionTerm(term, "member-1"));
1036         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 0,
1037                 new MockRaftActorContext.MockPayload("A")));
1038         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 1,
1039                 new MockRaftActorContext.MockPayload("B")));
1040         InMemoryJournal.addEntry(persistenceId, seqN++, new ApplyJournalEntries(1));
1041         InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 2,
1042                 new MockRaftActorContext.MockPayload("C")));
1043
1044         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
1045                 ImmutableMap.<String, String>builder().put("member1", "address").build(), config)
1046                     .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1047         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1048
1049         mockRaftActor.waitForRecoveryComplete();
1050
1051         mockRaftActor.snapshotCohortDelegate = mock(RaftActorSnapshotCohort.class);
1052
1053         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1054
1055         ArgumentCaptor<ActorRef> replyActor = ArgumentCaptor.forClass(ActorRef.class);
1056         verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).createSnapshot(replyActor.capture());
1057
1058         byte[] stateSnapshot = new byte[]{1,2,3};
1059         replyActor.getValue().tell(new CaptureSnapshotReply(stateSnapshot), ActorRef.noSender());
1060
1061         GetSnapshotReply reply = kit.expectMsgClass(GetSnapshotReply.class);
1062
1063         assertEquals("getId", persistenceId, reply.getId());
1064         Snapshot replySnapshot = SerializationUtils.deserialize(reply.getSnapshot());
1065         assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm());
1066         assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor());
1067         assertEquals("getLastAppliedIndex", 1L, replySnapshot.getLastAppliedIndex());
1068         assertEquals("getLastAppliedTerm", term, replySnapshot.getLastAppliedTerm());
1069         assertEquals("getLastIndex", 2L, replySnapshot.getLastIndex());
1070         assertEquals("getLastTerm", term, replySnapshot.getLastTerm());
1071         assertArrayEquals("getState", stateSnapshot, replySnapshot.getState());
1072         assertEquals("getUnAppliedEntries size", 1, replySnapshot.getUnAppliedEntries().size());
1073         assertEquals("UnApplied entry index ", 2L, replySnapshot.getUnAppliedEntries().get(0).getIndex());
1074
1075         // Test with timeout
1076
1077         mockRaftActor.getSnapshotMessageSupport().setSnapshotReplyActorTimeout(
1078                 Duration.create(200, TimeUnit.MILLISECONDS));
1079         reset(mockRaftActor.snapshotCohortDelegate);
1080
1081         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1082         Failure failure = kit.expectMsgClass(akka.actor.Status.Failure.class);
1083         assertEquals("Failure cause type", TimeoutException.class, failure.cause().getClass());
1084
1085         mockRaftActor.getSnapshotMessageSupport().setSnapshotReplyActorTimeout(Duration.create(30, TimeUnit.SECONDS));
1086
1087         // Test with persistence disabled.
1088
1089         mockRaftActor.setPersistence(false);
1090         reset(mockRaftActor.snapshotCohortDelegate);
1091
1092         raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef());
1093         reply = kit.expectMsgClass(GetSnapshotReply.class);
1094         verify(mockRaftActor.snapshotCohortDelegate, never()).createSnapshot(any(ActorRef.class));
1095
1096         assertEquals("getId", persistenceId, reply.getId());
1097         replySnapshot = SerializationUtils.deserialize(reply.getSnapshot());
1098         assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm());
1099         assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor());
1100         assertEquals("getLastAppliedIndex", -1L, replySnapshot.getLastAppliedIndex());
1101         assertEquals("getLastAppliedTerm", -1L, replySnapshot.getLastAppliedTerm());
1102         assertEquals("getLastIndex", -1L, replySnapshot.getLastIndex());
1103         assertEquals("getLastTerm", -1L, replySnapshot.getLastTerm());
1104         assertEquals("getState length", 0, replySnapshot.getState().length);
1105         assertEquals("getUnAppliedEntries size", 0, replySnapshot.getUnAppliedEntries().size());
1106
1107         TEST_LOG.info("testGetSnapshot ending");
1108     }
1109
1110     @Test
1111     public void testRestoreFromSnapshot() throws Exception {
1112         TEST_LOG.info("testRestoreFromSnapshot starting");
1113
1114         String persistenceId = factory.generateActorId("test-actor-");
1115         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1116         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1117
1118         List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
1119         snapshotUnappliedEntries.add(new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
1120                 new MockRaftActorContext.MockPayload("E")));
1121
1122         int snapshotLastApplied = 3;
1123         int snapshotLastIndex = 4;
1124
1125         List<MockPayload> state = Arrays.asList(
1126                 new MockRaftActorContext.MockPayload("A"),
1127                 new MockRaftActorContext.MockPayload("B"),
1128                 new MockRaftActorContext.MockPayload("C"),
1129                 new MockRaftActorContext.MockPayload("D"));
1130         ByteString stateBytes = fromObject(state);
1131
1132         Snapshot snapshot = Snapshot.create(stateBytes.toByteArray(), snapshotUnappliedEntries,
1133                 snapshotLastIndex, 1, snapshotLastApplied, 1, 1, "member-1");
1134
1135         InMemorySnapshotStore.addSnapshotSavedLatch(persistenceId);
1136
1137         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId)
1138                 .config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props()
1139                     .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1140         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1141
1142         mockRaftActor.waitForRecoveryComplete();
1143
1144         Snapshot savedSnapshot = InMemorySnapshotStore.waitForSavedSnapshot(persistenceId, Snapshot.class);
1145         assertEquals("getElectionTerm", snapshot.getElectionTerm(), savedSnapshot.getElectionTerm());
1146         assertEquals("getElectionVotedFor", snapshot.getElectionVotedFor(), savedSnapshot.getElectionVotedFor());
1147         assertEquals("getLastAppliedIndex", snapshot.getLastAppliedIndex(), savedSnapshot.getLastAppliedIndex());
1148         assertEquals("getLastAppliedTerm", snapshot.getLastAppliedTerm(), savedSnapshot.getLastAppliedTerm());
1149         assertEquals("getLastIndex", snapshot.getLastIndex(), savedSnapshot.getLastIndex());
1150         assertEquals("getLastTerm", snapshot.getLastTerm(), savedSnapshot.getLastTerm());
1151         assertArrayEquals("getState", snapshot.getState(), savedSnapshot.getState());
1152         assertEquals("getUnAppliedEntries", snapshot.getUnAppliedEntries(), savedSnapshot.getUnAppliedEntries());
1153
1154         verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).applySnapshot(any(byte[].class));
1155
1156         RaftActorContext context = mockRaftActor.getRaftActorContext();
1157         assertEquals("Journal log size", 1, context.getReplicatedLog().size());
1158         assertEquals("Last index", snapshotLastIndex, context.getReplicatedLog().lastIndex());
1159         assertEquals("Last applied", snapshotLastApplied, context.getLastApplied());
1160         assertEquals("Commit index", snapshotLastApplied, context.getCommitIndex());
1161         assertEquals("Recovered state", state, mockRaftActor.getState());
1162         assertEquals("Current term", 1L, context.getTermInformation().getCurrentTerm());
1163         assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor());
1164
1165         // Test with data persistence disabled
1166
1167         snapshot = Snapshot.create(new byte[0], Collections.<ReplicatedLogEntry>emptyList(),
1168                 -1, -1, -1, -1, 5, "member-1");
1169
1170         persistenceId = factory.generateActorId("test-actor-");
1171
1172         raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId)
1173                 .config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot))
1174                 .persistent(Optional.of(Boolean.FALSE)).props()
1175                     .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1176         mockRaftActor = raftActorRef.underlyingActor();
1177
1178         mockRaftActor.waitForRecoveryComplete();
1179         assertEquals("snapshot committed", true,
1180                 Uninterruptibles.awaitUninterruptibly(mockRaftActor.snapshotCommitted, 5, TimeUnit.SECONDS));
1181
1182         context = mockRaftActor.getRaftActorContext();
1183         assertEquals("Current term", 5L, context.getTermInformation().getCurrentTerm());
1184         assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor());
1185
1186         TEST_LOG.info("testRestoreFromSnapshot ending");
1187     }
1188
1189     @Test
1190     public void testRestoreFromSnapshotWithRecoveredData() throws Exception {
1191         TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData starting");
1192
1193         String persistenceId = factory.generateActorId("test-actor-");
1194         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1195         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1196
1197         List<MockPayload> state = Arrays.asList(new MockRaftActorContext.MockPayload("A"));
1198         Snapshot snapshot = Snapshot.create(fromObject(state).toByteArray(), Arrays.<ReplicatedLogEntry>asList(),
1199                 5, 2, 5, 2, 2, "member-1");
1200
1201         InMemoryJournal.addEntry(persistenceId, 1, new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
1202                 new MockRaftActorContext.MockPayload("B")));
1203
1204         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId)
1205                 .config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props()
1206                     .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1207         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1208
1209         mockRaftActor.waitForRecoveryComplete();
1210
1211         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
1212         verify(mockRaftActor.snapshotCohortDelegate, never()).applySnapshot(any(byte[].class));
1213
1214         RaftActorContext context = mockRaftActor.getRaftActorContext();
1215         assertEquals("Journal log size", 1, context.getReplicatedLog().size());
1216         assertEquals("Last index", 0, context.getReplicatedLog().lastIndex());
1217         assertEquals("Last applied", -1, context.getLastApplied());
1218         assertEquals("Commit index", -1, context.getCommitIndex());
1219         assertEquals("Current term", 0, context.getTermInformation().getCurrentTerm());
1220         assertEquals("Voted for", null, context.getTermInformation().getVotedFor());
1221
1222         TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData ending");
1223     }
1224
1225     @Test
1226     public void testNonVotingOnRecovery() throws Exception {
1227         TEST_LOG.info("testNonVotingOnRecovery starting");
1228
1229         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1230         config.setElectionTimeoutFactor(1);
1231         config.setHeartBeatInterval(FiniteDuration.create(1, TimeUnit.MILLISECONDS));
1232
1233         String persistenceId = factory.generateActorId("test-actor-");
1234         InMemoryJournal.addEntry(persistenceId, 1,  new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
1235                 new ServerConfigurationPayload(Arrays.asList(new ServerInfo(persistenceId, false)))));
1236
1237         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId)
1238                 .config(config).props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1239         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1240
1241         mockRaftActor.waitForInitializeBehaviorComplete();
1242
1243         // Sleep a bit and verify it didn't get an election timeout and schedule an election.
1244
1245         Uninterruptibles.sleepUninterruptibly(400, TimeUnit.MILLISECONDS);
1246         assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
1247
1248         TEST_LOG.info("testNonVotingOnRecovery ending");
1249     }
1250
1251     @Test
1252     public void testLeaderTransitioning() throws Exception {
1253         TEST_LOG.info("testLeaderTransitioning starting");
1254
1255         TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
1256                 Props.create(MessageCollectorActor.class));
1257
1258         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1259         config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
1260
1261         String persistenceId = factory.generateActorId("test-actor-");
1262
1263         TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId)
1264                 .config(config).roleChangeNotifier(notifierActor).props()
1265                 .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
1266         MockRaftActor mockRaftActor = raftActorRef.underlyingActor();
1267
1268         mockRaftActor.waitForInitializeBehaviorComplete();
1269
1270         raftActorRef.tell(new AppendEntries(1L, "leader", 0L, 1L, Collections.<ReplicatedLogEntry>emptyList(),
1271                 0L, -1L, (short)1), ActorRef.noSender());
1272         LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
1273                 notifierActor, LeaderStateChanged.class);
1274         assertEquals("getLeaderId", "leader", leaderStateChange.getLeaderId());
1275
1276         MessageCollectorActor.clearMessages(notifierActor);
1277
1278         raftActorRef.tell(LeaderTransitioning.INSTANCE, ActorRef.noSender());
1279
1280         leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
1281         assertEquals("getMemberId", persistenceId, leaderStateChange.getMemberId());
1282         assertEquals("getLeaderId", null, leaderStateChange.getLeaderId());
1283
1284         TEST_LOG.info("testLeaderTransitioning ending");
1285     }
1286
1287     @SuppressWarnings({ "unchecked", "rawtypes" })
1288     @Test
1289     public void testReplicateWithPersistencePending() throws Exception {
1290         final String leaderId = factory.generateActorId("leader-");
1291         final String followerId = factory.generateActorId("follower-");
1292
1293         final ActorRef followerActor = factory.createActor(Props.create(MessageCollectorActor.class));
1294
1295         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1296         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
1297         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
1298
1299         DataPersistenceProvider mockPersistenceProvider = mock(DataPersistenceProvider.class);
1300         doReturn(true).when(mockPersistenceProvider).isRecoveryApplicable();
1301
1302         TestActorRef<MockRaftActor> leaderActorRef = factory.createTestActor(
1303                 MockRaftActor.props(leaderId, ImmutableMap.of(followerId, followerActor.path().toString()), config,
1304                         mockPersistenceProvider), leaderId);
1305         MockRaftActor leaderActor = leaderActorRef.underlyingActor();
1306         leaderActor.waitForInitializeBehaviorComplete();
1307
1308         leaderActor.getRaftActorContext().getTermInformation().update(1, leaderId);
1309
1310         Leader leader = new Leader(leaderActor.getRaftActorContext());
1311         leaderActor.setCurrentBehavior(leader);
1312
1313         leaderActor.persistData(leaderActorRef, new MockIdentifier("1"), new MockRaftActorContext.MockPayload("1"));
1314
1315         ReplicatedLogEntry logEntry = leaderActor.getReplicatedLog().get(0);
1316         assertNotNull("ReplicatedLogEntry not found", logEntry);
1317         assertEquals("isPersistencePending", true, logEntry.isPersistencePending());
1318         assertEquals("getCommitIndex", -1, leaderActor.getRaftActorContext().getCommitIndex());
1319
1320         leaderActor.onReceiveCommand(new AppendEntriesReply(followerId, 1, true, 0, 1, (short)0));
1321         assertEquals("getCommitIndex", -1, leaderActor.getRaftActorContext().getCommitIndex());
1322
1323         ArgumentCaptor<Procedure> callbackCaptor = ArgumentCaptor.forClass(Procedure.class);
1324         verify(mockPersistenceProvider).persistAsync(eq(logEntry), callbackCaptor.capture());
1325
1326         callbackCaptor.getValue().apply(logEntry);
1327
1328         assertEquals("getCommitIndex", 0, leaderActor.getRaftActorContext().getCommitIndex());
1329         assertEquals("getLastApplied", 0, leaderActor.getRaftActorContext().getLastApplied());
1330     }
1331 }