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