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

   1 package org.opendaylight.controller.cluster.raft;
   2
   3 import static org.junit.Assert.assertEquals;
   4 import static org.junit.Assert.assertFalse;
   5 import static org.junit.Assert.assertNotNull;
   6 import static org.junit.Assert.assertNull;
   7 import static org.mockito.Matchers.any;
   8 import static org.mockito.Matchers.anyObject;
   9 import static org.mockito.Matchers.eq;
  10 import static org.mockito.Matchers.same;
  11 import static org.mockito.Mockito.doReturn;
  12 import static org.mockito.Mockito.mock;
  13 import static org.mockito.Mockito.times;
  14 import static org.mockito.Mockito.verify;
  15 import akka.actor.ActorRef;
  16 import akka.actor.PoisonPill;
  17 import akka.actor.Props;
  18 import akka.actor.Terminated;
  19 import akka.japi.Procedure;
  20 import akka.persistence.SaveSnapshotFailure;
  21 import akka.persistence.SaveSnapshotSuccess;
  22 import akka.persistence.SnapshotMetadata;
  23 import akka.persistence.SnapshotOffer;
  24 import akka.testkit.JavaTestKit;
  25 import akka.testkit.TestActorRef;
  26 import com.google.common.base.Optional;
  27 import com.google.common.collect.ImmutableMap;
  28 import com.google.common.util.concurrent.Uninterruptibles;
  29 import com.google.protobuf.ByteString;
  30 import java.io.ByteArrayOutputStream;
  31 import java.io.ObjectOutputStream;
  32 import java.util.ArrayList;
  33 import java.util.Arrays;
  34 import java.util.Collections;
  35 import java.util.HashMap;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.concurrent.CountDownLatch;
  39 import java.util.concurrent.TimeUnit;
  40 import org.junit.After;
  41 import org.junit.Before;
  42 import org.junit.Test;
  43 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  44 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  45 import org.opendaylight.controller.cluster.datastore.DataPersistenceProviderMonitor;
  46 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  47 import org.opendaylight.controller.cluster.notifications.RoleChanged;
  48 import org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries;
  49 import org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm;
  50 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  51 import org.opendaylight.controller.cluster.raft.base.messages.ApplyLogEntries;
  52 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  53 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  54 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  55 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  56 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  57 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  58 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  59 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  60 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  61 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
  62 import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
  63 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  64 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  65 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  66 import scala.concurrent.duration.FiniteDuration;
  67
  68 public class RaftActorTest extends AbstractActorTest {
  69
  70     private TestActorFactory factory;
  71
  72     @Before
  73     public void setUp(){
  74         factory = new TestActorFactory(getSystem());
  75     }
  76
  77     @After
  78     public void tearDown() throws Exception {
  79         factory.close();
  80         InMemoryJournal.clear();
  81         InMemorySnapshotStore.clear();
  82     }
  83
  84     @Test
  85     public void testConstruction() {
  86         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
  87     }
  88
  89     @Test
  90     public void testFindLeaderWhenLeaderIsSelf(){
  91         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
  92         kit.waitUntilLeader();
  93     }
  94
  95     @Test
  96     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
  97         new JavaTestKit(getSystem()) {{
  98             String persistenceId = factory.generateActorId("follower-");
  99
 100             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 101
 102             // Set the heartbeat interval high to essentially disable election otherwise the test
 103             // may fail if the actor is switched to Leader and the commitIndex is set to the last
 104             // log entry.
 105             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 106
 107             ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 108                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 109                     Optional.<ConfigParams>of(config)), persistenceId);
 110
 111             watch(followerActor);
 112
 113             List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 114             ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 115                     new MockRaftActorContext.MockPayload("E"));
 116             snapshotUnappliedEntries.add(entry1);
 117
 118             int lastAppliedDuringSnapshotCapture = 3;
 119             int lastIndexDuringSnapshotCapture = 4;
 120
 121             // 4 messages as part of snapshot, which are applied to state
 122             ByteString snapshotBytes = fromObject(Arrays.asList(
 123                     new MockRaftActorContext.MockPayload("A"),
 124                     new MockRaftActorContext.MockPayload("B"),
 125                     new MockRaftActorContext.MockPayload("C"),
 126                     new MockRaftActorContext.MockPayload("D")));
 127
 128             Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 129                     snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 130                     lastAppliedDuringSnapshotCapture, 1);
 131             InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 132
 133             // add more entries after snapshot is taken
 134             List<ReplicatedLogEntry> entries = new ArrayList<>();
 135             ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 136                     new MockRaftActorContext.MockPayload("F", 2));
 137             ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 138                     new MockRaftActorContext.MockPayload("G", 3));
 139             ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 140                     new MockRaftActorContext.MockPayload("H", 4));
 141             entries.add(entry2);
 142             entries.add(entry3);
 143             entries.add(entry4);
 144
 145             int lastAppliedToState = 5;
 146             int lastIndex = 7;
 147
 148             InMemoryJournal.addEntry(persistenceId, 5, entry2);
 149             // 2 entries are applied to state besides the 4 entries in snapshot
 150             InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 151             InMemoryJournal.addEntry(persistenceId, 7, entry3);
 152             InMemoryJournal.addEntry(persistenceId, 8, entry4);
 153
 154             // kill the actor
 155             followerActor.tell(PoisonPill.getInstance(), null);
 156             expectMsgClass(duration("5 seconds"), Terminated.class);
 157
 158             unwatch(followerActor);
 159
 160             //reinstate the actor
 161             TestActorRef<MockRaftActor> ref = factory.createTestActor(
 162                     MockRaftActor.props(persistenceId, Collections.<String, String>emptyMap(),
 163                             Optional.<ConfigParams>of(config)));
 164
 165             MockRaftActor mockRaftActor = ref.underlyingActor();
 166
 167             mockRaftActor.waitForRecoveryComplete();
 168
 169             RaftActorContext context = mockRaftActor.getRaftActorContext();
 170             assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 171                     context.getReplicatedLog().size());
 172             assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 173             assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 174             assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 175             assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 176             assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 177
 178             mockRaftActor.waitForInitializeBehaviorComplete();
 179
 180             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 181         }};
 182     }
 183
 184     @Test
 185     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 186         new JavaTestKit(getSystem()) {{
 187             String persistenceId = factory.generateActorId("follower-");
 188
 189             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 190
 191             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 192
 193             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 194                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 195                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()), persistenceId);
 196
 197             MockRaftActor mockRaftActor = ref.underlyingActor();
 198
 199             mockRaftActor.waitForRecoveryComplete();
 200
 201             mockRaftActor.waitForInitializeBehaviorComplete();
 202
 203             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 204         }};
 205     }
 206
 207     @Test
 208     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 209         String persistenceId = factory.generateActorId("leader-");
 210
 211         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 212
 213         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 214
 215         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 216                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
 217
 218         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 219
 220         // Wait for akka's recovery to complete so it doesn't interfere.
 221         mockRaftActor.waitForRecoveryComplete();
 222
 223         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 224         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 225
 226         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 227         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 228         mockRaftActor.handleRecover(snapshotOffer);
 229
 230         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 231                 1, new MockRaftActorContext.MockPayload("1", 5));
 232         mockRaftActor.handleRecover(logEntry);
 233
 234         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 235         mockRaftActor.handleRecover(applyJournalEntries);
 236
 237         ApplyLogEntries applyLogEntries = new ApplyLogEntries(0);
 238         mockRaftActor.handleRecover(applyLogEntries);
 239
 240         DeleteEntries deleteEntries = new DeleteEntries(1);
 241         mockRaftActor.handleRecover(deleteEntries);
 242
 243         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 244         mockRaftActor.handleRecover(updateElectionTerm);
 245
 246         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer));
 247         verify(mockSupport).handleRecoveryMessage(same(logEntry));
 248         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries));
 249         verify(mockSupport).handleRecoveryMessage(same(applyLogEntries));
 250         verify(mockSupport).handleRecoveryMessage(same(deleteEntries));
 251         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm));
 252     }
 253
 254     @Test
 255     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 256         String persistenceId = factory.generateActorId("leader-");
 257
 258         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 259
 260         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 261
 262         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 263
 264         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 265                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), mockSupport), persistenceId);
 266
 267         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 268
 269         // Wait for akka's recovery to complete so it doesn't interfere.
 270         mockRaftActor.waitForRecoveryComplete();
 271
 272         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 273         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot));
 274         mockRaftActor.handleCommand(applySnapshot);
 275
 276         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1);
 277         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 278         mockRaftActor.handleCommand(captureSnapshot);
 279
 280         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 281         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 282         mockRaftActor.handleCommand(captureSnapshotReply);
 283
 284         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(mock(SnapshotMetadata.class));
 285         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 286         mockRaftActor.handleCommand(saveSnapshotSuccess);
 287
 288         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(mock(SnapshotMetadata.class), new Throwable());
 289         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 290         mockRaftActor.handleCommand(saveSnapshotFailure);
 291
 292         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 293         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 294
 295         verify(mockSupport).handleSnapshotMessage(same(applySnapshot));
 296         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 297         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 298         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 299         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 300         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 301     }
 302
 303     @Test
 304     public void testUpdatingElectionTermCallsDataPersistence() throws Exception {
 305         new JavaTestKit(getSystem()) {
 306             {
 307                 String persistenceId = factory.generateActorId("leader-");
 308
 309                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 310
 311                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 312
 313                 CountDownLatch persistLatch = new CountDownLatch(1);
 314                 DataPersistenceProviderMonitor dataPersistenceProviderMonitor = new DataPersistenceProviderMonitor();
 315                 dataPersistenceProviderMonitor.setPersistLatch(persistLatch);
 316
 317                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 318                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProviderMonitor), persistenceId);
 319
 320                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 321
 322                 mockRaftActor.waitForInitializeBehaviorComplete();
 323
 324                 mockRaftActor.getRaftActorContext().getTermInformation().updateAndPersist(10, "foobar");
 325
 326                 assertEquals("Persist called", true, persistLatch.await(5, TimeUnit.SECONDS));
 327             }
 328         };
 329     }
 330
 331     @Test
 332     public void testAddingReplicatedLogEntryCallsDataPersistence() throws Exception {
 333         new JavaTestKit(getSystem()) {
 334             {
 335                 String persistenceId = factory.generateActorId("leader-");
 336
 337                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 338
 339                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 340
 341                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 342
 343                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 344                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 345
 346                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 347
 348                 mockRaftActor.waitForInitializeBehaviorComplete();
 349
 350                 MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(10, 10, mock(Payload.class));
 351
 352                 mockRaftActor.getRaftActorContext().getReplicatedLog().appendAndPersist(logEntry);
 353
 354                 verify(dataPersistenceProvider).persist(eq(logEntry), any(Procedure.class));
 355             }
 356         };
 357     }
 358
 359     @Test
 360     public void testRemovingReplicatedLogEntryCallsDataPersistence() throws Exception {
 361         new JavaTestKit(getSystem()) {
 362             {
 363                 String persistenceId = factory.generateActorId("leader-");
 364
 365                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 366
 367                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 368
 369                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 370
 371                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 372                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 373
 374                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 375
 376                 mockRaftActor.waitForInitializeBehaviorComplete();
 377
 378                 mockRaftActor.waitUntilLeader();
 379
 380                 mockRaftActor.getReplicatedLog().appendAndPersist(new MockRaftActorContext.MockReplicatedLogEntry(1, 0, mock(Payload.class)));
 381
 382                 mockRaftActor.getRaftActorContext().getReplicatedLog().removeFromAndPersist(0);
 383
 384                 verify(dataPersistenceProvider, times(3)).persist(anyObject(), any(Procedure.class));
 385             }
 386         };
 387     }
 388
 389     @Test
 390     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 391         new JavaTestKit(getSystem()) {
 392             {
 393                 String persistenceId = factory.generateActorId("leader-");
 394
 395                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 396
 397                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 398
 399                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 400
 401                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 402                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 403
 404                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 405
 406                 mockRaftActor.waitForInitializeBehaviorComplete();
 407
 408                 mockRaftActor.waitUntilLeader();
 409
 410                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 411
 412                 verify(dataPersistenceProvider, times(2)).persist(anyObject(), any(Procedure.class));
 413
 414             }
 415
 416         };
 417     }
 418
 419     @Test
 420     public void testApplyState() throws Exception {
 421
 422         new JavaTestKit(getSystem()) {
 423             {
 424                 String persistenceId = factory.generateActorId("leader-");
 425
 426                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 427
 428                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 429
 430                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 431
 432                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 433                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 434
 435                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 436
 437                 mockRaftActor.waitForInitializeBehaviorComplete();
 438
 439                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 440                         new MockRaftActorContext.MockPayload("F"));
 441
 442                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
 443
 444                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
 445
 446             }
 447         };
 448     }
 449
 450     @Test
 451     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 452         new JavaTestKit(getSystem()) {{
 453             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 454                     Props.create(MessageCollectorActor.class));
 455             MessageCollectorActor.waitUntilReady(notifierActor);
 456
 457             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 458             long heartBeatInterval = 100;
 459             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 460             config.setElectionTimeoutFactor(20);
 461
 462             String persistenceId = factory.generateActorId("notifier-");
 463
 464             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 465                     Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor,
 466                     new NonPersistentDataProvider()), persistenceId);
 467
 468             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 469
 470
 471             // check if the notifier got a role change from null to Follower
 472             RoleChanged raftRoleChanged = matches.get(0);
 473             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 474             assertNull(raftRoleChanged.getOldRole());
 475             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 476
 477             // check if the notifier got a role change from Follower to Candidate
 478             raftRoleChanged = matches.get(1);
 479             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 480             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 481             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 482
 483             // check if the notifier got a role change from Candidate to Leader
 484             raftRoleChanged = matches.get(2);
 485             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 486             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 487             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 488
 489             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 490                     notifierActor, LeaderStateChanged.class);
 491
 492             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 493
 494             notifierActor.underlyingActor().clear();
 495
 496             MockRaftActor raftActor = raftActorRef.underlyingActor();
 497             final String newLeaderId = "new-leader";
 498             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 499                 @Override
 500                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 501                     leaderId = newLeaderId;
 502                     return this;
 503                 }
 504             };
 505
 506             raftActor.changeCurrentBehavior(follower);
 507
 508             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 509             assertEquals(persistenceId, leaderStateChange.getMemberId());
 510             assertEquals(null, leaderStateChange.getLeaderId());
 511
 512             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 513             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 514             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 515
 516             notifierActor.underlyingActor().clear();
 517
 518             raftActor.handleCommand("any");
 519
 520             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 521             assertEquals(persistenceId, leaderStateChange.getMemberId());
 522             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 523         }};
 524     }
 525
 526     @Test
 527     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 528         new JavaTestKit(getSystem()) {{
 529             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 530             MessageCollectorActor.waitUntilReady(notifierActor);
 531
 532             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 533             long heartBeatInterval = 100;
 534             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 535             config.setElectionTimeoutFactor(1);
 536
 537             String persistenceId = factory.generateActorId("notifier-");
 538
 539             factory.createActor(MockRaftActor.props(persistenceId,
 540                     ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
 541
 542             List<RoleChanged> matches =  null;
 543             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 544                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 545                 assertNotNull(matches);
 546                 if(matches.size() == 3) {
 547                     break;
 548                 }
 549                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 550             }
 551
 552             assertEquals(2, matches.size());
 553
 554             // check if the notifier got a role change from null to Follower
 555             RoleChanged raftRoleChanged = matches.get(0);
 556             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 557             assertNull(raftRoleChanged.getOldRole());
 558             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 559
 560             // check if the notifier got a role change from Follower to Candidate
 561             raftRoleChanged = matches.get(1);
 562             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 563             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 564             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 565
 566         }};
 567     }
 568
 569     @Test
 570     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 571         new JavaTestKit(getSystem()) {
 572             {
 573                 String persistenceId = factory.generateActorId("leader-");
 574                 String follower1Id = factory.generateActorId("follower-");
 575
 576                 ActorRef followerActor1 =
 577                         factory.createActor(Props.create(MessageCollectorActor.class));
 578
 579                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 580                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 581                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 582
 583                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 584
 585                 Map<String, String> peerAddresses = new HashMap<>();
 586                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 587
 588                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 589                         MockRaftActor.props(persistenceId, peerAddresses,
 590                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 591
 592                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 593
 594                 leaderActor.getRaftActorContext().setCommitIndex(4);
 595                 leaderActor.getRaftActorContext().setLastApplied(4);
 596                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 597
 598                 leaderActor.waitForInitializeBehaviorComplete();
 599
 600                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 601
 602                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 603                 leaderActor.setCurrentBehavior(leader);
 604                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 605
 606                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 607                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 608
 609                 assertEquals(8, leaderActor.getReplicatedLog().size());
 610
 611                 leaderActor.getRaftActorContext().getSnapshotManager()
 612                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 613                                 new MockRaftActorContext.MockPayload("x")), 4);
 614
 615                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 616
 617                 assertEquals(8, leaderActor.getReplicatedLog().size());
 618
 619                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 620                 //fake snapshot on index 5
 621                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1));
 622
 623                 assertEquals(8, leaderActor.getReplicatedLog().size());
 624
 625                 //fake snapshot on index 6
 626                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 627                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1));
 628                 assertEquals(8, leaderActor.getReplicatedLog().size());
 629
 630                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 631
 632                 assertEquals(8, leaderActor.getReplicatedLog().size());
 633
 634                 ByteString snapshotBytes = fromObject(Arrays.asList(
 635                         new MockRaftActorContext.MockPayload("foo-0"),
 636                         new MockRaftActorContext.MockPayload("foo-1"),
 637                         new MockRaftActorContext.MockPayload("foo-2"),
 638                         new MockRaftActorContext.MockPayload("foo-3"),
 639                         new MockRaftActorContext.MockPayload("foo-4")));
 640
 641                 leaderActor.getRaftActorContext().getSnapshotManager().persist(new NonPersistentDataProvider()
 642                         , snapshotBytes.toByteArray(), leader, Runtime.getRuntime().totalMemory());
 643
 644                 assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 645
 646                 // The commit is needed to complete the snapshot creation process
 647                 leaderActor.getRaftActorContext().getSnapshotManager().commit(new NonPersistentDataProvider(), -1);
 648
 649                 // capture snapshot reply should remove the snapshotted entries only
 650                 assertEquals(3, leaderActor.getReplicatedLog().size());
 651                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 652
 653                 // add another non-replicated entry
 654                 leaderActor.getReplicatedLog().append(
 655                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 656
 657                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 658                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1));
 659                 assertEquals(2, leaderActor.getReplicatedLog().size());
 660                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 661
 662             }
 663         };
 664     }
 665
 666     @Test
 667     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 668         new JavaTestKit(getSystem()) {
 669             {
 670                 String persistenceId = factory.generateActorId("follower-");
 671                 String leaderId = factory.generateActorId("leader-");
 672
 673
 674                 ActorRef leaderActor1 =
 675                         factory.createActor(Props.create(MessageCollectorActor.class));
 676
 677                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 678                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 679                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 680
 681                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 682
 683                 Map<String, String> peerAddresses = new HashMap<>();
 684                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 685
 686                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 687                         MockRaftActor.props(persistenceId, peerAddresses,
 688                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 689
 690                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 691                 followerActor.getRaftActorContext().setCommitIndex(4);
 692                 followerActor.getRaftActorContext().setLastApplied(4);
 693                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 694
 695                 followerActor.waitForInitializeBehaviorComplete();
 696
 697
 698                 Follower follower = new Follower(followerActor.getRaftActorContext());
 699                 followerActor.setCurrentBehavior(follower);
 700                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 701
 702                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 703                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 704                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 705
 706                 // log has indices 0-5
 707                 assertEquals(6, followerActor.getReplicatedLog().size());
 708
 709                 //snapshot on 4
 710                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 711                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 712                                 new MockRaftActorContext.MockPayload("D")), 4);
 713
 714                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 715
 716                 assertEquals(6, followerActor.getReplicatedLog().size());
 717
 718                 //fake snapshot on index 6
 719                 List<ReplicatedLogEntry> entries =
 720                         Arrays.asList(
 721                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 722                                         new MockRaftActorContext.MockPayload("foo-6"))
 723                         );
 724                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5));
 725                 assertEquals(7, followerActor.getReplicatedLog().size());
 726
 727                 //fake snapshot on index 7
 728                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 729
 730                 entries =
 731                         Arrays.asList(
 732                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 733                                         new MockRaftActorContext.MockPayload("foo-7"))
 734                         );
 735                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6));
 736                 assertEquals(8, followerActor.getReplicatedLog().size());
 737
 738                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 739
 740
 741                 ByteString snapshotBytes = fromObject(Arrays.asList(
 742                         new MockRaftActorContext.MockPayload("foo-0"),
 743                         new MockRaftActorContext.MockPayload("foo-1"),
 744                         new MockRaftActorContext.MockPayload("foo-2"),
 745                         new MockRaftActorContext.MockPayload("foo-3"),
 746                         new MockRaftActorContext.MockPayload("foo-4")));
 747                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 748                 assertFalse(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 749
 750                 // The commit is needed to complete the snapshot creation process
 751                 followerActor.getRaftActorContext().getSnapshotManager().commit(new NonPersistentDataProvider(), -1);
 752
 753                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 754                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 755                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 756
 757                 entries =
 758                         Arrays.asList(
 759                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 760                                         new MockRaftActorContext.MockPayload("foo-7"))
 761                         );
 762                 // send an additional entry 8 with leaderCommit = 7
 763                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7));
 764
 765                 // 7 and 8, as lastapplied is 7
 766                 assertEquals(2, followerActor.getReplicatedLog().size());
 767
 768             }
 769         };
 770     }
 771
 772     @Test
 773     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 774         new JavaTestKit(getSystem()) {
 775             {
 776                 String persistenceId = factory.generateActorId("leader-");
 777                 String follower1Id = factory.generateActorId("follower-");
 778                 String follower2Id = factory.generateActorId("follower-");
 779
 780                 ActorRef followerActor1 =
 781                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 782                 ActorRef followerActor2 =
 783                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 784
 785                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 786                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 787                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 788
 789                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 790
 791                 Map<String, String> peerAddresses = new HashMap<>();
 792                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 793                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 794
 795                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 796                         MockRaftActor.props(persistenceId, peerAddresses,
 797                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 798
 799                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 800                 leaderActor.getRaftActorContext().setCommitIndex(9);
 801                 leaderActor.getRaftActorContext().setLastApplied(9);
 802                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 803
 804                 leaderActor.waitForInitializeBehaviorComplete();
 805
 806                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 807                 leaderActor.setCurrentBehavior(leader);
 808                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 809
 810                 // create 5 entries in the log
 811                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 812                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 813
 814                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 815                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 816                 //setting replicatedToAllIndex = 9, for the log to clear
 817                 leader.setReplicatedToAllIndex(9);
 818                 assertEquals(5, leaderActor.getReplicatedLog().size());
 819                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 820
 821                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1));
 822                 assertEquals(5, leaderActor.getReplicatedLog().size());
 823                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 824
 825                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 826                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1));
 827                 assertEquals(5, leaderActor.getReplicatedLog().size());
 828                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 829
 830                 // simulate a real snapshot
 831                 leaderActor.onReceiveCommand(new SendHeartBeat());
 832                 assertEquals(5, leaderActor.getReplicatedLog().size());
 833                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 834                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 835                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 836
 837
 838                 //reply from a slow follower does not initiate a fake snapshot
 839                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1));
 840                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 841
 842                 ByteString snapshotBytes = fromObject(Arrays.asList(
 843                         new MockRaftActorContext.MockPayload("foo-0"),
 844                         new MockRaftActorContext.MockPayload("foo-1"),
 845                         new MockRaftActorContext.MockPayload("foo-2"),
 846                         new MockRaftActorContext.MockPayload("foo-3"),
 847                         new MockRaftActorContext.MockPayload("foo-4")));
 848                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 849                 assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 850
 851                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 852
 853                 //reply from a slow follower after should not raise errors
 854                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1));
 855                 assertEquals(0, leaderActor.getReplicatedLog().size());
 856             }
 857         };
 858     }
 859
 860     @Test
 861     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 862         new JavaTestKit(getSystem()) {{
 863             String persistenceId = factory.generateActorId("leader-");
 864             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 865             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 866             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 867             config.setSnapshotBatchCount(5);
 868
 869             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 870
 871             Map<String, String> peerAddresses = new HashMap<>();
 872
 873             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 874                     MockRaftActor.props(persistenceId, peerAddresses,
 875                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 876
 877             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 878             leaderActor.getRaftActorContext().setCommitIndex(3);
 879             leaderActor.getRaftActorContext().setLastApplied(3);
 880             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 881
 882             leaderActor.waitForInitializeBehaviorComplete();
 883             for(int i=0;i< 4;i++) {
 884                 leaderActor.getReplicatedLog()
 885                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 886                                 new MockRaftActorContext.MockPayload("A")));
 887             }
 888
 889             Leader leader = new Leader(leaderActor.getRaftActorContext());
 890             leaderActor.setCurrentBehavior(leader);
 891             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 892
 893             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 894             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 895
 896             // Now send a CaptureSnapshotReply
 897             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 898
 899             // Trimming log in this scenario is a no-op
 900             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 901             assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 902             assertEquals(-1, leader.getReplicatedToAllIndex());
 903
 904         }};
 905     }
 906
 907     @Test
 908     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 909         new JavaTestKit(getSystem()) {{
 910             String persistenceId = factory.generateActorId("leader-");
 911             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 912             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 913             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 914             config.setSnapshotBatchCount(5);
 915
 916             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 917
 918             Map<String, String> peerAddresses = new HashMap<>();
 919
 920             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 921                     MockRaftActor.props(persistenceId, peerAddresses,
 922                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 923
 924             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 925             leaderActor.getRaftActorContext().setCommitIndex(3);
 926             leaderActor.getRaftActorContext().setLastApplied(3);
 927             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 928             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 929
 930             leaderActor.waitForInitializeBehaviorComplete();
 931             Leader leader = new Leader(leaderActor.getRaftActorContext());
 932             leaderActor.setCurrentBehavior(leader);
 933             leader.setReplicatedToAllIndex(3);
 934             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 935
 936             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 937             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 938
 939             // Now send a CaptureSnapshotReply
 940             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 941
 942             // Trimming log in this scenario is a no-op
 943             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 944             assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 945             assertEquals(3, leader.getReplicatedToAllIndex());
 946
 947         }};
 948     }
 949
 950     private ByteString fromObject(Object snapshot) throws Exception {
 951         ByteArrayOutputStream b = null;
 952         ObjectOutputStream o = null;
 953         try {
 954             b = new ByteArrayOutputStream();
 955             o = new ObjectOutputStream(b);
 956             o.writeObject(snapshot);
 957             byte[] snapshotBytes = b.toByteArray();
 958             return ByteString.copyFrom(snapshotBytes);
 959         } finally {
 960             if (o != null) {
 961                 o.flush();
 962                 o.close();
 963             }
 964             if (b != null) {
 965                 b.close();
 966             }
 967         }
 968     }
 969
 970 }