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.UpdateElectionTerm;
  49 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  50 import org.opendaylight.controller.cluster.raft.base.messages.ApplyLogEntries;
  51 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  52 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  53 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  54 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  55 import org.opendaylight.controller.cluster.raft.base.messages.DeleteEntries;
  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         org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries deprecatedDeleteEntries =
 244                 new org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries(1);
 245         mockRaftActor.handleRecover(deprecatedDeleteEntries);
 246
 247         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 248         mockRaftActor.handleRecover(updateElectionTerm);
 249
 250         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer));
 251         verify(mockSupport).handleRecoveryMessage(same(logEntry));
 252         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries));
 253         verify(mockSupport).handleRecoveryMessage(same(applyLogEntries));
 254         verify(mockSupport).handleRecoveryMessage(same(deleteEntries));
 255         verify(mockSupport).handleRecoveryMessage(same(deprecatedDeleteEntries));
 256         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm));
 257     }
 258
 259     @Test
 260     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 261         String persistenceId = factory.generateActorId("leader-");
 262
 263         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 264
 265         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 266
 267         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 268
 269         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 270                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), mockSupport), persistenceId);
 271
 272         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 273
 274         // Wait for akka's recovery to complete so it doesn't interfere.
 275         mockRaftActor.waitForRecoveryComplete();
 276
 277         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 278         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot));
 279         mockRaftActor.handleCommand(applySnapshot);
 280
 281         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1);
 282         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 283         mockRaftActor.handleCommand(captureSnapshot);
 284
 285         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 286         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 287         mockRaftActor.handleCommand(captureSnapshotReply);
 288
 289         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(mock(SnapshotMetadata.class));
 290         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 291         mockRaftActor.handleCommand(saveSnapshotSuccess);
 292
 293         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(mock(SnapshotMetadata.class), new Throwable());
 294         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 295         mockRaftActor.handleCommand(saveSnapshotFailure);
 296
 297         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 298         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 299
 300         verify(mockSupport).handleSnapshotMessage(same(applySnapshot));
 301         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 302         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 303         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 304         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 305         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 306     }
 307
 308     @Test
 309     public void testUpdatingElectionTermCallsDataPersistence() throws Exception {
 310         new JavaTestKit(getSystem()) {
 311             {
 312                 String persistenceId = factory.generateActorId("leader-");
 313
 314                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 315
 316                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 317
 318                 CountDownLatch persistLatch = new CountDownLatch(1);
 319                 DataPersistenceProviderMonitor dataPersistenceProviderMonitor = new DataPersistenceProviderMonitor();
 320                 dataPersistenceProviderMonitor.setPersistLatch(persistLatch);
 321
 322                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 323                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProviderMonitor), persistenceId);
 324
 325                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 326
 327                 mockRaftActor.waitForInitializeBehaviorComplete();
 328
 329                 mockRaftActor.getRaftActorContext().getTermInformation().updateAndPersist(10, "foobar");
 330
 331                 assertEquals("Persist called", true, persistLatch.await(5, TimeUnit.SECONDS));
 332             }
 333         };
 334     }
 335
 336     @Test
 337     public void testAddingReplicatedLogEntryCallsDataPersistence() throws Exception {
 338         new JavaTestKit(getSystem()) {
 339             {
 340                 String persistenceId = factory.generateActorId("leader-");
 341
 342                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 343
 344                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 345
 346                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 347
 348                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 349                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 350
 351                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 352
 353                 mockRaftActor.waitForInitializeBehaviorComplete();
 354
 355                 MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(10, 10, mock(Payload.class));
 356
 357                 mockRaftActor.getRaftActorContext().getReplicatedLog().appendAndPersist(logEntry);
 358
 359                 verify(dataPersistenceProvider).persist(eq(logEntry), any(Procedure.class));
 360             }
 361         };
 362     }
 363
 364     @Test
 365     public void testRemovingReplicatedLogEntryCallsDataPersistence() throws Exception {
 366         new JavaTestKit(getSystem()) {
 367             {
 368                 String persistenceId = factory.generateActorId("leader-");
 369
 370                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 371
 372                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 373
 374                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 375
 376                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 377                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 378
 379                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 380
 381                 mockRaftActor.waitForInitializeBehaviorComplete();
 382
 383                 mockRaftActor.waitUntilLeader();
 384
 385                 mockRaftActor.getReplicatedLog().appendAndPersist(new MockRaftActorContext.MockReplicatedLogEntry(1, 0, mock(Payload.class)));
 386
 387                 mockRaftActor.getRaftActorContext().getReplicatedLog().removeFromAndPersist(0);
 388
 389                 verify(dataPersistenceProvider, times(3)).persist(anyObject(), any(Procedure.class));
 390             }
 391         };
 392     }
 393
 394     @Test
 395     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 396         new JavaTestKit(getSystem()) {
 397             {
 398                 String persistenceId = factory.generateActorId("leader-");
 399
 400                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 401
 402                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 403
 404                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 405
 406                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 407                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 408
 409                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 410
 411                 mockRaftActor.waitForInitializeBehaviorComplete();
 412
 413                 mockRaftActor.waitUntilLeader();
 414
 415                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 416
 417                 verify(dataPersistenceProvider, times(2)).persist(anyObject(), any(Procedure.class));
 418
 419             }
 420
 421         };
 422     }
 423
 424     @Test
 425     public void testApplyState() throws Exception {
 426
 427         new JavaTestKit(getSystem()) {
 428             {
 429                 String persistenceId = factory.generateActorId("leader-");
 430
 431                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 432
 433                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 434
 435                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 436
 437                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 438                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 439
 440                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 441
 442                 mockRaftActor.waitForInitializeBehaviorComplete();
 443
 444                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 445                         new MockRaftActorContext.MockPayload("F"));
 446
 447                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
 448
 449                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
 450
 451             }
 452         };
 453     }
 454
 455     @Test
 456     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 457         new JavaTestKit(getSystem()) {{
 458             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 459                     Props.create(MessageCollectorActor.class));
 460             MessageCollectorActor.waitUntilReady(notifierActor);
 461
 462             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 463             long heartBeatInterval = 100;
 464             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 465             config.setElectionTimeoutFactor(20);
 466
 467             String persistenceId = factory.generateActorId("notifier-");
 468
 469             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 470                     Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor,
 471                     new NonPersistentDataProvider()), persistenceId);
 472
 473             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 474
 475
 476             // check if the notifier got a role change from null to Follower
 477             RoleChanged raftRoleChanged = matches.get(0);
 478             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 479             assertNull(raftRoleChanged.getOldRole());
 480             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 481
 482             // check if the notifier got a role change from Follower to Candidate
 483             raftRoleChanged = matches.get(1);
 484             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 485             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 486             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 487
 488             // check if the notifier got a role change from Candidate to Leader
 489             raftRoleChanged = matches.get(2);
 490             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 491             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 492             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 493
 494             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 495                     notifierActor, LeaderStateChanged.class);
 496
 497             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 498
 499             notifierActor.underlyingActor().clear();
 500
 501             MockRaftActor raftActor = raftActorRef.underlyingActor();
 502             final String newLeaderId = "new-leader";
 503             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 504                 @Override
 505                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 506                     leaderId = newLeaderId;
 507                     return this;
 508                 }
 509             };
 510
 511             raftActor.changeCurrentBehavior(follower);
 512
 513             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 514             assertEquals(persistenceId, leaderStateChange.getMemberId());
 515             assertEquals(null, leaderStateChange.getLeaderId());
 516
 517             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 518             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 519             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 520
 521             notifierActor.underlyingActor().clear();
 522
 523             raftActor.handleCommand("any");
 524
 525             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 526             assertEquals(persistenceId, leaderStateChange.getMemberId());
 527             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 528         }};
 529     }
 530
 531     @Test
 532     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 533         new JavaTestKit(getSystem()) {{
 534             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 535             MessageCollectorActor.waitUntilReady(notifierActor);
 536
 537             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 538             long heartBeatInterval = 100;
 539             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 540             config.setElectionTimeoutFactor(1);
 541
 542             String persistenceId = factory.generateActorId("notifier-");
 543
 544             factory.createActor(MockRaftActor.props(persistenceId,
 545                     ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
 546
 547             List<RoleChanged> matches =  null;
 548             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 549                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 550                 assertNotNull(matches);
 551                 if(matches.size() == 3) {
 552                     break;
 553                 }
 554                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 555             }
 556
 557             assertEquals(2, matches.size());
 558
 559             // check if the notifier got a role change from null to Follower
 560             RoleChanged raftRoleChanged = matches.get(0);
 561             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 562             assertNull(raftRoleChanged.getOldRole());
 563             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 564
 565             // check if the notifier got a role change from Follower to Candidate
 566             raftRoleChanged = matches.get(1);
 567             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 568             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 569             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 570
 571         }};
 572     }
 573
 574     @Test
 575     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 576         new JavaTestKit(getSystem()) {
 577             {
 578                 String persistenceId = factory.generateActorId("leader-");
 579                 String follower1Id = factory.generateActorId("follower-");
 580
 581                 ActorRef followerActor1 =
 582                         factory.createActor(Props.create(MessageCollectorActor.class));
 583
 584                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 585                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 586                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 587
 588                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 589
 590                 Map<String, String> peerAddresses = new HashMap<>();
 591                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 592
 593                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 594                         MockRaftActor.props(persistenceId, peerAddresses,
 595                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 596
 597                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 598
 599                 leaderActor.getRaftActorContext().setCommitIndex(4);
 600                 leaderActor.getRaftActorContext().setLastApplied(4);
 601                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 602
 603                 leaderActor.waitForInitializeBehaviorComplete();
 604
 605                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 606
 607                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 608                 leaderActor.setCurrentBehavior(leader);
 609                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 610
 611                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 612                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 613
 614                 assertEquals(8, leaderActor.getReplicatedLog().size());
 615
 616                 leaderActor.getRaftActorContext().getSnapshotManager()
 617                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 618                                 new MockRaftActorContext.MockPayload("x")), 4);
 619
 620                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 621
 622                 assertEquals(8, leaderActor.getReplicatedLog().size());
 623
 624                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 625                 //fake snapshot on index 5
 626                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1));
 627
 628                 assertEquals(8, leaderActor.getReplicatedLog().size());
 629
 630                 //fake snapshot on index 6
 631                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 632                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1));
 633                 assertEquals(8, leaderActor.getReplicatedLog().size());
 634
 635                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 636
 637                 assertEquals(8, leaderActor.getReplicatedLog().size());
 638
 639                 ByteString snapshotBytes = fromObject(Arrays.asList(
 640                         new MockRaftActorContext.MockPayload("foo-0"),
 641                         new MockRaftActorContext.MockPayload("foo-1"),
 642                         new MockRaftActorContext.MockPayload("foo-2"),
 643                         new MockRaftActorContext.MockPayload("foo-3"),
 644                         new MockRaftActorContext.MockPayload("foo-4")));
 645
 646                 leaderActor.getRaftActorContext().getSnapshotManager().persist(new NonPersistentDataProvider()
 647                         , snapshotBytes.toByteArray(), leader, Runtime.getRuntime().totalMemory());
 648
 649                 assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 650
 651                 // The commit is needed to complete the snapshot creation process
 652                 leaderActor.getRaftActorContext().getSnapshotManager().commit(new NonPersistentDataProvider(), -1);
 653
 654                 // capture snapshot reply should remove the snapshotted entries only
 655                 assertEquals(3, leaderActor.getReplicatedLog().size());
 656                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 657
 658                 // add another non-replicated entry
 659                 leaderActor.getReplicatedLog().append(
 660                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 661
 662                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 663                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1));
 664                 assertEquals(2, leaderActor.getReplicatedLog().size());
 665                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 666
 667             }
 668         };
 669     }
 670
 671     @Test
 672     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 673         new JavaTestKit(getSystem()) {
 674             {
 675                 String persistenceId = factory.generateActorId("follower-");
 676                 String leaderId = factory.generateActorId("leader-");
 677
 678
 679                 ActorRef leaderActor1 =
 680                         factory.createActor(Props.create(MessageCollectorActor.class));
 681
 682                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 683                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 684                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 685
 686                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 687
 688                 Map<String, String> peerAddresses = new HashMap<>();
 689                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 690
 691                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 692                         MockRaftActor.props(persistenceId, peerAddresses,
 693                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 694
 695                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 696                 followerActor.getRaftActorContext().setCommitIndex(4);
 697                 followerActor.getRaftActorContext().setLastApplied(4);
 698                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 699
 700                 followerActor.waitForInitializeBehaviorComplete();
 701
 702
 703                 Follower follower = new Follower(followerActor.getRaftActorContext());
 704                 followerActor.setCurrentBehavior(follower);
 705                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 706
 707                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 708                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 709                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 710
 711                 // log has indices 0-5
 712                 assertEquals(6, followerActor.getReplicatedLog().size());
 713
 714                 //snapshot on 4
 715                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 716                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 717                                 new MockRaftActorContext.MockPayload("D")), 4);
 718
 719                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 720
 721                 assertEquals(6, followerActor.getReplicatedLog().size());
 722
 723                 //fake snapshot on index 6
 724                 List<ReplicatedLogEntry> entries =
 725                         Arrays.asList(
 726                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 727                                         new MockRaftActorContext.MockPayload("foo-6"))
 728                         );
 729                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5));
 730                 assertEquals(7, followerActor.getReplicatedLog().size());
 731
 732                 //fake snapshot on index 7
 733                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 734
 735                 entries =
 736                         Arrays.asList(
 737                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 738                                         new MockRaftActorContext.MockPayload("foo-7"))
 739                         );
 740                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6));
 741                 assertEquals(8, followerActor.getReplicatedLog().size());
 742
 743                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 744
 745
 746                 ByteString snapshotBytes = fromObject(Arrays.asList(
 747                         new MockRaftActorContext.MockPayload("foo-0"),
 748                         new MockRaftActorContext.MockPayload("foo-1"),
 749                         new MockRaftActorContext.MockPayload("foo-2"),
 750                         new MockRaftActorContext.MockPayload("foo-3"),
 751                         new MockRaftActorContext.MockPayload("foo-4")));
 752                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 753                 assertFalse(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 754
 755                 // The commit is needed to complete the snapshot creation process
 756                 followerActor.getRaftActorContext().getSnapshotManager().commit(new NonPersistentDataProvider(), -1);
 757
 758                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 759                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 760                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 761
 762                 entries =
 763                         Arrays.asList(
 764                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 765                                         new MockRaftActorContext.MockPayload("foo-7"))
 766                         );
 767                 // send an additional entry 8 with leaderCommit = 7
 768                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7));
 769
 770                 // 7 and 8, as lastapplied is 7
 771                 assertEquals(2, followerActor.getReplicatedLog().size());
 772
 773             }
 774         };
 775     }
 776
 777     @Test
 778     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 779         new JavaTestKit(getSystem()) {
 780             {
 781                 String persistenceId = factory.generateActorId("leader-");
 782                 String follower1Id = factory.generateActorId("follower-");
 783                 String follower2Id = factory.generateActorId("follower-");
 784
 785                 ActorRef followerActor1 =
 786                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 787                 ActorRef followerActor2 =
 788                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 789
 790                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 791                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 792                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 793
 794                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 795
 796                 Map<String, String> peerAddresses = new HashMap<>();
 797                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 798                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 799
 800                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 801                         MockRaftActor.props(persistenceId, peerAddresses,
 802                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 803
 804                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 805                 leaderActor.getRaftActorContext().setCommitIndex(9);
 806                 leaderActor.getRaftActorContext().setLastApplied(9);
 807                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 808
 809                 leaderActor.waitForInitializeBehaviorComplete();
 810
 811                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 812                 leaderActor.setCurrentBehavior(leader);
 813                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 814
 815                 // create 5 entries in the log
 816                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 817                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 818
 819                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 820                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 821                 //setting replicatedToAllIndex = 9, for the log to clear
 822                 leader.setReplicatedToAllIndex(9);
 823                 assertEquals(5, leaderActor.getReplicatedLog().size());
 824                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 825
 826                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1));
 827                 assertEquals(5, leaderActor.getReplicatedLog().size());
 828                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 829
 830                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 831                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1));
 832                 assertEquals(5, leaderActor.getReplicatedLog().size());
 833                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 834
 835                 // simulate a real snapshot
 836                 leaderActor.onReceiveCommand(new SendHeartBeat());
 837                 assertEquals(5, leaderActor.getReplicatedLog().size());
 838                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 839                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 840                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 841
 842
 843                 //reply from a slow follower does not initiate a fake snapshot
 844                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1));
 845                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 846
 847                 ByteString snapshotBytes = fromObject(Arrays.asList(
 848                         new MockRaftActorContext.MockPayload("foo-0"),
 849                         new MockRaftActorContext.MockPayload("foo-1"),
 850                         new MockRaftActorContext.MockPayload("foo-2"),
 851                         new MockRaftActorContext.MockPayload("foo-3"),
 852                         new MockRaftActorContext.MockPayload("foo-4")));
 853                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 854                 assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 855
 856                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 857
 858                 //reply from a slow follower after should not raise errors
 859                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1));
 860                 assertEquals(0, leaderActor.getReplicatedLog().size());
 861             }
 862         };
 863     }
 864
 865     @Test
 866     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 867         new JavaTestKit(getSystem()) {{
 868             String persistenceId = factory.generateActorId("leader-");
 869             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 870             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 871             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 872             config.setSnapshotBatchCount(5);
 873
 874             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 875
 876             Map<String, String> peerAddresses = new HashMap<>();
 877
 878             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 879                     MockRaftActor.props(persistenceId, peerAddresses,
 880                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 881
 882             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 883             leaderActor.getRaftActorContext().setCommitIndex(3);
 884             leaderActor.getRaftActorContext().setLastApplied(3);
 885             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 886
 887             leaderActor.waitForInitializeBehaviorComplete();
 888             for(int i=0;i< 4;i++) {
 889                 leaderActor.getReplicatedLog()
 890                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 891                                 new MockRaftActorContext.MockPayload("A")));
 892             }
 893
 894             Leader leader = new Leader(leaderActor.getRaftActorContext());
 895             leaderActor.setCurrentBehavior(leader);
 896             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 897
 898             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 899             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 900
 901             // Now send a CaptureSnapshotReply
 902             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 903
 904             // Trimming log in this scenario is a no-op
 905             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 906             assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 907             assertEquals(-1, leader.getReplicatedToAllIndex());
 908
 909         }};
 910     }
 911
 912     @Test
 913     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 914         new JavaTestKit(getSystem()) {{
 915             String persistenceId = factory.generateActorId("leader-");
 916             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 917             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 918             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 919             config.setSnapshotBatchCount(5);
 920
 921             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 922
 923             Map<String, String> peerAddresses = new HashMap<>();
 924
 925             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 926                     MockRaftActor.props(persistenceId, peerAddresses,
 927                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 928
 929             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 930             leaderActor.getRaftActorContext().setCommitIndex(3);
 931             leaderActor.getRaftActorContext().setLastApplied(3);
 932             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 933             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 934
 935             leaderActor.waitForInitializeBehaviorComplete();
 936             Leader leader = new Leader(leaderActor.getRaftActorContext());
 937             leaderActor.setCurrentBehavior(leader);
 938             leader.setReplicatedToAllIndex(3);
 939             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 940
 941             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 942             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 943
 944             // Now send a CaptureSnapshotReply
 945             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 946
 947             // Trimming log in this scenario is a no-op
 948             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 949             assertFalse(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 950             assertEquals(3, leader.getReplicatedToAllIndex());
 951
 952         }};
 953     }
 954
 955     private ByteString fromObject(Object snapshot) throws Exception {
 956         ByteArrayOutputStream b = null;
 957         ObjectOutputStream o = null;
 958         try {
 959             b = new ByteArrayOutputStream();
 960             o = new ObjectOutputStream(b);
 961             o.writeObject(snapshot);
 962             byte[] snapshotBytes = b.toByteArray();
 963             return ByteString.copyFrom(snapshotBytes);
 964         } finally {
 965             if (o != null) {
 966                 o.flush();
 967                 o.close();
 968             }
 969             if (b != null) {
 970                 b.close();
 971             }
 972         }
 973     }
 974
 975 }