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.assertNotNull;
   5 import static org.junit.Assert.assertNull;
   6 import static org.junit.Assert.assertTrue;
   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.RecoveryCompleted;
  21 import akka.persistence.SaveSnapshotFailure;
  22 import akka.persistence.SaveSnapshotSuccess;
  23 import akka.persistence.SnapshotMetadata;
  24 import akka.persistence.SnapshotOffer;
  25 import akka.testkit.JavaTestKit;
  26 import akka.testkit.TestActorRef;
  27 import com.google.common.base.Optional;
  28 import com.google.common.collect.ImmutableMap;
  29 import com.google.common.util.concurrent.Uninterruptibles;
  30 import com.google.protobuf.ByteString;
  31 import java.io.ByteArrayOutputStream;
  32 import java.io.ObjectOutputStream;
  33 import java.util.ArrayList;
  34 import java.util.Arrays;
  35 import java.util.Collections;
  36 import java.util.HashMap;
  37 import java.util.List;
  38 import java.util.Map;
  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.notifications.LeaderStateChanged;
  46 import org.opendaylight.controller.cluster.notifications.RoleChanged;
  47 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  48 import org.opendaylight.controller.cluster.raft.base.messages.ApplyLogEntries;
  49 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  50 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  51 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  52 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  53 import org.opendaylight.controller.cluster.raft.base.messages.DeleteEntries;
  54 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  55 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  56 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  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.utils.InMemoryJournal;
  63 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  64 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  65 import org.slf4j.Logger;
  66 import org.slf4j.LoggerFactory;
  67 import scala.concurrent.duration.FiniteDuration;
  68
  69 public class RaftActorTest extends AbstractActorTest {
  70
  71     static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class);
  72
  73     private TestActorFactory factory;
  74
  75     @Before
  76     public void setUp(){
  77         factory = new TestActorFactory(getSystem());
  78     }
  79
  80     @After
  81     public void tearDown() throws Exception {
  82         factory.close();
  83         InMemoryJournal.clear();
  84         InMemorySnapshotStore.clear();
  85     }
  86
  87     @Test
  88     public void testConstruction() {
  89         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
  90     }
  91
  92     @Test
  93     public void testFindLeaderWhenLeaderIsSelf(){
  94         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
  95         kit.waitUntilLeader();
  96     }
  97
  98     @Test
  99     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
 100         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting");
 101
 102         new JavaTestKit(getSystem()) {{
 103             String persistenceId = factory.generateActorId("follower-");
 104
 105             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 106
 107             // Set the heartbeat interval high to essentially disable election otherwise the test
 108             // may fail if the actor is switched to Leader and the commitIndex is set to the last
 109             // log entry.
 110             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 111
 112             ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 113             ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 114                     peerAddresses, Optional.<ConfigParams>of(config)), persistenceId);
 115
 116             watch(followerActor);
 117
 118             List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 119             ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 120                     new MockRaftActorContext.MockPayload("E"));
 121             snapshotUnappliedEntries.add(entry1);
 122
 123             int lastAppliedDuringSnapshotCapture = 3;
 124             int lastIndexDuringSnapshotCapture = 4;
 125
 126             // 4 messages as part of snapshot, which are applied to state
 127             ByteString snapshotBytes = fromObject(Arrays.asList(
 128                     new MockRaftActorContext.MockPayload("A"),
 129                     new MockRaftActorContext.MockPayload("B"),
 130                     new MockRaftActorContext.MockPayload("C"),
 131                     new MockRaftActorContext.MockPayload("D")));
 132
 133             Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 134                     snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 135                     lastAppliedDuringSnapshotCapture, 1);
 136             InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 137
 138             // add more entries after snapshot is taken
 139             List<ReplicatedLogEntry> entries = new ArrayList<>();
 140             ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 141                     new MockRaftActorContext.MockPayload("F", 2));
 142             ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 143                     new MockRaftActorContext.MockPayload("G", 3));
 144             ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 145                     new MockRaftActorContext.MockPayload("H", 4));
 146             entries.add(entry2);
 147             entries.add(entry3);
 148             entries.add(entry4);
 149
 150             int lastAppliedToState = 5;
 151             int lastIndex = 7;
 152
 153             InMemoryJournal.addEntry(persistenceId, 5, entry2);
 154             // 2 entries are applied to state besides the 4 entries in snapshot
 155             InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 156             InMemoryJournal.addEntry(persistenceId, 7, entry3);
 157             InMemoryJournal.addEntry(persistenceId, 8, entry4);
 158
 159             // kill the actor
 160             followerActor.tell(PoisonPill.getInstance(), null);
 161             expectMsgClass(duration("5 seconds"), Terminated.class);
 162
 163             unwatch(followerActor);
 164
 165             //reinstate the actor
 166             TestActorRef<MockRaftActor> ref = factory.createTestActor(
 167                     MockRaftActor.props(persistenceId, peerAddresses, Optional.<ConfigParams>of(config)));
 168
 169             MockRaftActor mockRaftActor = ref.underlyingActor();
 170
 171             mockRaftActor.waitForRecoveryComplete();
 172
 173             RaftActorContext context = mockRaftActor.getRaftActorContext();
 174             assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 175                     context.getReplicatedLog().size());
 176             assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 177             assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 178             assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 179             assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 180             assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 181
 182             mockRaftActor.waitForInitializeBehaviorComplete();
 183
 184             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 185         }};
 186
 187         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending");
 188     }
 189
 190     @Test
 191     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 192         new JavaTestKit(getSystem()) {{
 193             String persistenceId = factory.generateActorId("follower-");
 194
 195             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 196
 197             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 198
 199             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 200                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 201                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()), persistenceId);
 202
 203             MockRaftActor mockRaftActor = ref.underlyingActor();
 204
 205             mockRaftActor.waitForRecoveryComplete();
 206
 207             mockRaftActor.waitForInitializeBehaviorComplete();
 208
 209             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 210         }};
 211     }
 212
 213     @Test
 214     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 215         String persistenceId = factory.generateActorId("leader-");
 216
 217         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 218
 219         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 220
 221         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 222                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
 223
 224         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 225
 226         // Wait for akka's recovery to complete so it doesn't interfere.
 227         mockRaftActor.waitForRecoveryComplete();
 228
 229         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 230         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 231
 232         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 233         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 234         mockRaftActor.handleRecover(snapshotOffer);
 235
 236         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 237                 1, new MockRaftActorContext.MockPayload("1", 5));
 238         mockRaftActor.handleRecover(logEntry);
 239
 240         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 241         mockRaftActor.handleRecover(applyJournalEntries);
 242
 243         ApplyLogEntries applyLogEntries = new ApplyLogEntries(0);
 244         mockRaftActor.handleRecover(applyLogEntries);
 245
 246         DeleteEntries deleteEntries = new DeleteEntries(1);
 247         mockRaftActor.handleRecover(deleteEntries);
 248
 249         org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries deprecatedDeleteEntries =
 250                 new org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries(1);
 251         mockRaftActor.handleRecover(deprecatedDeleteEntries);
 252
 253         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 254         mockRaftActor.handleRecover(updateElectionTerm);
 255
 256         org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm deprecatedUpdateElectionTerm =
 257                 new org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm(6, "member3");
 258         mockRaftActor.handleRecover(deprecatedUpdateElectionTerm);
 259
 260         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer));
 261         verify(mockSupport).handleRecoveryMessage(same(logEntry));
 262         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries));
 263         verify(mockSupport).handleRecoveryMessage(same(applyLogEntries));
 264         verify(mockSupport).handleRecoveryMessage(same(deleteEntries));
 265         verify(mockSupport).handleRecoveryMessage(same(deprecatedDeleteEntries));
 266         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm));
 267         verify(mockSupport).handleRecoveryMessage(same(deprecatedUpdateElectionTerm));
 268     }
 269
 270     @Test
 271     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 272         String persistenceId = factory.generateActorId("leader-");
 273
 274         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 275
 276         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 277
 278         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 279
 280         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 281                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), mockSupport), persistenceId);
 282
 283         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 284
 285         // Wait for akka's recovery to complete so it doesn't interfere.
 286         mockRaftActor.waitForRecoveryComplete();
 287
 288         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 289         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot));
 290         mockRaftActor.handleCommand(applySnapshot);
 291
 292         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 293         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 294         mockRaftActor.handleCommand(captureSnapshot);
 295
 296         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 297         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 298         mockRaftActor.handleCommand(captureSnapshotReply);
 299
 300         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(mock(SnapshotMetadata.class));
 301         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 302         mockRaftActor.handleCommand(saveSnapshotSuccess);
 303
 304         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(mock(SnapshotMetadata.class), new Throwable());
 305         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 306         mockRaftActor.handleCommand(saveSnapshotFailure);
 307
 308         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 309         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 310
 311         verify(mockSupport).handleSnapshotMessage(same(applySnapshot));
 312         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 313         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 314         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 315         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 316         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 317     }
 318
 319     @Test
 320     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 321         new JavaTestKit(getSystem()) {
 322             {
 323                 String persistenceId = factory.generateActorId("leader-");
 324
 325                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 326
 327                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 328
 329                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 330
 331                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 332                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 333
 334                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 335
 336                 mockRaftActor.waitForInitializeBehaviorComplete();
 337
 338                 mockRaftActor.waitUntilLeader();
 339
 340                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 341
 342                 verify(dataPersistenceProvider, times(2)).persist(anyObject(), any(Procedure.class));
 343
 344             }
 345
 346         };
 347     }
 348
 349     @Test
 350     public void testApplyState() throws Exception {
 351
 352         new JavaTestKit(getSystem()) {
 353             {
 354                 String persistenceId = factory.generateActorId("leader-");
 355
 356                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 357
 358                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 359
 360                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 361
 362                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 363                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 364
 365                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 366
 367                 mockRaftActor.waitForInitializeBehaviorComplete();
 368
 369                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 370                         new MockRaftActorContext.MockPayload("F"));
 371
 372                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
 373
 374                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
 375
 376             }
 377         };
 378     }
 379
 380     @Test
 381     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 382         new JavaTestKit(getSystem()) {{
 383             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 384                     Props.create(MessageCollectorActor.class));
 385             MessageCollectorActor.waitUntilReady(notifierActor);
 386
 387             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 388             long heartBeatInterval = 100;
 389             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 390             config.setElectionTimeoutFactor(20);
 391
 392             String persistenceId = factory.generateActorId("notifier-");
 393
 394             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 395                     Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor,
 396                     new NonPersistentDataProvider()), persistenceId);
 397
 398             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 399
 400
 401             // check if the notifier got a role change from null to Follower
 402             RoleChanged raftRoleChanged = matches.get(0);
 403             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 404             assertNull(raftRoleChanged.getOldRole());
 405             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 406
 407             // check if the notifier got a role change from Follower to Candidate
 408             raftRoleChanged = matches.get(1);
 409             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 410             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 411             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 412
 413             // check if the notifier got a role change from Candidate to Leader
 414             raftRoleChanged = matches.get(2);
 415             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 416             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 417             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 418
 419             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 420                     notifierActor, LeaderStateChanged.class);
 421
 422             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 423             assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 424
 425             notifierActor.underlyingActor().clear();
 426
 427             MockRaftActor raftActor = raftActorRef.underlyingActor();
 428             final String newLeaderId = "new-leader";
 429             final short newLeaderVersion = 6;
 430             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 431                 @Override
 432                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 433                     leaderId = newLeaderId;
 434                     setLeaderPayloadVersion(newLeaderVersion);
 435                     return this;
 436                 }
 437             };
 438
 439             raftActor.changeCurrentBehavior(follower);
 440
 441             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 442             assertEquals(persistenceId, leaderStateChange.getMemberId());
 443             assertEquals(null, leaderStateChange.getLeaderId());
 444
 445             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 446             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 447             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 448
 449             notifierActor.underlyingActor().clear();
 450
 451             raftActor.handleCommand("any");
 452
 453             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 454             assertEquals(persistenceId, leaderStateChange.getMemberId());
 455             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 456             assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 457
 458             notifierActor.underlyingActor().clear();
 459
 460             raftActor.handleCommand("any");
 461
 462             Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 463             leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 464             assertNull(leaderStateChange);
 465         }};
 466     }
 467
 468     @Test
 469     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 470         new JavaTestKit(getSystem()) {{
 471             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 472             MessageCollectorActor.waitUntilReady(notifierActor);
 473
 474             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 475             long heartBeatInterval = 100;
 476             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 477             config.setElectionTimeoutFactor(1);
 478
 479             String persistenceId = factory.generateActorId("notifier-");
 480
 481             factory.createActor(MockRaftActor.props(persistenceId,
 482                     ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
 483
 484             List<RoleChanged> matches =  null;
 485             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 486                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 487                 assertNotNull(matches);
 488                 if(matches.size() == 3) {
 489                     break;
 490                 }
 491                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 492             }
 493
 494             assertNotNull(matches);
 495             assertEquals(2, matches.size());
 496
 497             // check if the notifier got a role change from null to Follower
 498             RoleChanged raftRoleChanged = matches.get(0);
 499             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 500             assertNull(raftRoleChanged.getOldRole());
 501             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 502
 503             // check if the notifier got a role change from Follower to Candidate
 504             raftRoleChanged = matches.get(1);
 505             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 506             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 507             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 508
 509         }};
 510     }
 511
 512     @Test
 513     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 514         new JavaTestKit(getSystem()) {
 515             {
 516                 String persistenceId = factory.generateActorId("leader-");
 517                 String follower1Id = factory.generateActorId("follower-");
 518
 519                 ActorRef followerActor1 =
 520                         factory.createActor(Props.create(MessageCollectorActor.class));
 521
 522                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 523                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 524                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 525
 526                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 527
 528                 Map<String, String> peerAddresses = new HashMap<>();
 529                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 530
 531                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 532                         MockRaftActor.props(persistenceId, peerAddresses,
 533                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 534
 535                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 536
 537                 leaderActor.getRaftActorContext().setCommitIndex(4);
 538                 leaderActor.getRaftActorContext().setLastApplied(4);
 539                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 540
 541                 leaderActor.waitForInitializeBehaviorComplete();
 542
 543                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 544
 545                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 546                 leaderActor.setCurrentBehavior(leader);
 547                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 548
 549                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 550                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 551
 552                 assertEquals(8, leaderActor.getReplicatedLog().size());
 553
 554                 leaderActor.getRaftActorContext().getSnapshotManager()
 555                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 556                                 new MockRaftActorContext.MockPayload("x")), 4);
 557
 558                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 559
 560                 assertEquals(8, leaderActor.getReplicatedLog().size());
 561
 562                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 563                 //fake snapshot on index 5
 564                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 565
 566                 assertEquals(8, leaderActor.getReplicatedLog().size());
 567
 568                 //fake snapshot on index 6
 569                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 570                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 571                 assertEquals(8, leaderActor.getReplicatedLog().size());
 572
 573                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 574
 575                 assertEquals(8, leaderActor.getReplicatedLog().size());
 576
 577                 ByteString snapshotBytes = fromObject(Arrays.asList(
 578                         new MockRaftActorContext.MockPayload("foo-0"),
 579                         new MockRaftActorContext.MockPayload("foo-1"),
 580                         new MockRaftActorContext.MockPayload("foo-2"),
 581                         new MockRaftActorContext.MockPayload("foo-3"),
 582                         new MockRaftActorContext.MockPayload("foo-4")));
 583
 584                 leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 585                         leader, Runtime.getRuntime().totalMemory());
 586
 587                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 588
 589                 // The commit is needed to complete the snapshot creation process
 590                 leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, leader);
 591
 592                 // capture snapshot reply should remove the snapshotted entries only
 593                 assertEquals(3, leaderActor.getReplicatedLog().size());
 594                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 595
 596                 // add another non-replicated entry
 597                 leaderActor.getReplicatedLog().append(
 598                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 599
 600                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 601                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 602                 assertEquals(2, leaderActor.getReplicatedLog().size());
 603                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 604
 605             }
 606         };
 607     }
 608
 609     @Test
 610     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 611         new JavaTestKit(getSystem()) {
 612             {
 613                 String persistenceId = factory.generateActorId("follower-");
 614                 String leaderId = factory.generateActorId("leader-");
 615
 616
 617                 ActorRef leaderActor1 =
 618                         factory.createActor(Props.create(MessageCollectorActor.class));
 619
 620                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 621                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 622                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 623
 624                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 625
 626                 Map<String, String> peerAddresses = new HashMap<>();
 627                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 628
 629                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 630                         MockRaftActor.props(persistenceId, peerAddresses,
 631                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 632
 633                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 634                 followerActor.getRaftActorContext().setCommitIndex(4);
 635                 followerActor.getRaftActorContext().setLastApplied(4);
 636                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 637
 638                 followerActor.waitForInitializeBehaviorComplete();
 639
 640
 641                 Follower follower = new Follower(followerActor.getRaftActorContext());
 642                 followerActor.setCurrentBehavior(follower);
 643                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 644
 645                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 646                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 647                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 648
 649                 // log has indices 0-5
 650                 assertEquals(6, followerActor.getReplicatedLog().size());
 651
 652                 //snapshot on 4
 653                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 654                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 655                                 new MockRaftActorContext.MockPayload("D")), 4);
 656
 657                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 658
 659                 assertEquals(6, followerActor.getReplicatedLog().size());
 660
 661                 //fake snapshot on index 6
 662                 List<ReplicatedLogEntry> entries =
 663                         Arrays.asList(
 664                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 665                                         new MockRaftActorContext.MockPayload("foo-6"))
 666                         );
 667                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 668                 assertEquals(7, followerActor.getReplicatedLog().size());
 669
 670                 //fake snapshot on index 7
 671                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 672
 673                 entries =
 674                         Arrays.asList(
 675                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 676                                         new MockRaftActorContext.MockPayload("foo-7"))
 677                         );
 678                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 679                 assertEquals(8, followerActor.getReplicatedLog().size());
 680
 681                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 682
 683
 684                 ByteString snapshotBytes = fromObject(Arrays.asList(
 685                         new MockRaftActorContext.MockPayload("foo-0"),
 686                         new MockRaftActorContext.MockPayload("foo-1"),
 687                         new MockRaftActorContext.MockPayload("foo-2"),
 688                         new MockRaftActorContext.MockPayload("foo-3"),
 689                         new MockRaftActorContext.MockPayload("foo-4")));
 690                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 691                 assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 692
 693                 // The commit is needed to complete the snapshot creation process
 694                 followerActor.getRaftActorContext().getSnapshotManager().commit(-1, follower);
 695
 696                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 697                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 698                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 699
 700                 entries =
 701                         Arrays.asList(
 702                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 703                                         new MockRaftActorContext.MockPayload("foo-7"))
 704                         );
 705                 // send an additional entry 8 with leaderCommit = 7
 706                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 707
 708                 // 7 and 8, as lastapplied is 7
 709                 assertEquals(2, followerActor.getReplicatedLog().size());
 710
 711             }
 712         };
 713     }
 714
 715     @Test
 716     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 717         new JavaTestKit(getSystem()) {
 718             {
 719                 String persistenceId = factory.generateActorId("leader-");
 720                 String follower1Id = factory.generateActorId("follower-");
 721                 String follower2Id = factory.generateActorId("follower-");
 722
 723                 ActorRef followerActor1 =
 724                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 725                 ActorRef followerActor2 =
 726                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 727
 728                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 729                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 730                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 731
 732                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 733
 734                 Map<String, String> peerAddresses = new HashMap<>();
 735                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 736                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 737
 738                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 739                         MockRaftActor.props(persistenceId, peerAddresses,
 740                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 741
 742                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 743                 leaderActor.getRaftActorContext().setCommitIndex(9);
 744                 leaderActor.getRaftActorContext().setLastApplied(9);
 745                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 746
 747                 leaderActor.waitForInitializeBehaviorComplete();
 748
 749                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 750                 leaderActor.setCurrentBehavior(leader);
 751                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 752
 753                 // create 5 entries in the log
 754                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 755                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 756
 757                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 758                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 759                 //setting replicatedToAllIndex = 9, for the log to clear
 760                 leader.setReplicatedToAllIndex(9);
 761                 assertEquals(5, leaderActor.getReplicatedLog().size());
 762                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 763
 764                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 765                 assertEquals(5, leaderActor.getReplicatedLog().size());
 766                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 767
 768                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 769                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 770                 assertEquals(5, leaderActor.getReplicatedLog().size());
 771                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 772
 773                 // simulate a real snapshot
 774                 leaderActor.onReceiveCommand(new SendHeartBeat());
 775                 assertEquals(5, leaderActor.getReplicatedLog().size());
 776                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 777                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 778                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 779
 780
 781                 //reply from a slow follower does not initiate a fake snapshot
 782                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 783                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 784
 785                 ByteString snapshotBytes = fromObject(Arrays.asList(
 786                         new MockRaftActorContext.MockPayload("foo-0"),
 787                         new MockRaftActorContext.MockPayload("foo-1"),
 788                         new MockRaftActorContext.MockPayload("foo-2"),
 789                         new MockRaftActorContext.MockPayload("foo-3"),
 790                         new MockRaftActorContext.MockPayload("foo-4")));
 791                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 792                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 793
 794                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 795
 796                 //reply from a slow follower after should not raise errors
 797                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 798                 assertEquals(0, leaderActor.getReplicatedLog().size());
 799             }
 800         };
 801     }
 802
 803     @Test
 804     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 805         new JavaTestKit(getSystem()) {{
 806             String persistenceId = factory.generateActorId("leader-");
 807             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 808             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 809             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 810             config.setSnapshotBatchCount(5);
 811
 812             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 813
 814             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 815
 816             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 817                     MockRaftActor.props(persistenceId, peerAddresses,
 818                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 819
 820             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 821             leaderActor.getRaftActorContext().setCommitIndex(3);
 822             leaderActor.getRaftActorContext().setLastApplied(3);
 823             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 824
 825             leaderActor.waitForInitializeBehaviorComplete();
 826             for(int i=0;i< 4;i++) {
 827                 leaderActor.getReplicatedLog()
 828                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 829                                 new MockRaftActorContext.MockPayload("A")));
 830             }
 831
 832             Leader leader = new Leader(leaderActor.getRaftActorContext());
 833             leaderActor.setCurrentBehavior(leader);
 834             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 835
 836             // Simulate an install snaphost to a follower.
 837             leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 838                     leaderActor.getReplicatedLog().last(), -1, "member1");
 839
 840             // Now send a CaptureSnapshotReply
 841             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 842
 843             // Trimming log in this scenario is a no-op
 844             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 845             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 846             assertEquals(-1, leader.getReplicatedToAllIndex());
 847
 848         }};
 849     }
 850
 851     @Test
 852     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 853         new JavaTestKit(getSystem()) {{
 854             String persistenceId = factory.generateActorId("leader-");
 855             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 856             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 857             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 858             config.setSnapshotBatchCount(5);
 859
 860             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 861
 862             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 863
 864             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 865                     MockRaftActor.props(persistenceId, peerAddresses,
 866                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 867
 868             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 869             leaderActor.getRaftActorContext().setCommitIndex(3);
 870             leaderActor.getRaftActorContext().setLastApplied(3);
 871             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 872             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 873
 874             leaderActor.waitForInitializeBehaviorComplete();
 875             Leader leader = new Leader(leaderActor.getRaftActorContext());
 876             leaderActor.setCurrentBehavior(leader);
 877             leader.setReplicatedToAllIndex(3);
 878             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 879
 880             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 881             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 882
 883             // Now send a CaptureSnapshotReply
 884             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 885
 886             // Trimming log in this scenario is a no-op
 887             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 888             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 889             assertEquals(3, leader.getReplicatedToAllIndex());
 890
 891         }};
 892     }
 893
 894     @Test
 895     public void testSwitchBehavior(){
 896         String persistenceId = factory.generateActorId("leader-");
 897         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 898         config.setCustomRaftPolicyImplementationClass("org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 899         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 900         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 901         config.setSnapshotBatchCount(5);
 902
 903         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 904
 905         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 906
 907         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 908                 MockRaftActor.props(persistenceId, peerAddresses,
 909                         Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 910
 911         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 912
 913         leaderActor.handleRecover(RecoveryCompleted.getInstance());
 914
 915         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 916
 917         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 918         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 919
 920         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 921
 922         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 923         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 924
 925         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 926
 927         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 928         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 929
 930         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 931
 932         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 933         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 934
 935
 936     }
 937
 938     public static ByteString fromObject(Object snapshot) throws Exception {
 939         ByteArrayOutputStream b = null;
 940         ObjectOutputStream o = null;
 941         try {
 942             b = new ByteArrayOutputStream();
 943             o = new ObjectOutputStream(b);
 944             o.writeObject(snapshot);
 945             byte[] snapshotBytes = b.toByteArray();
 946             return ByteString.copyFrom(snapshotBytes);
 947         } finally {
 948             if (o != null) {
 949                 o.flush();
 950                 o.close();
 951             }
 952             if (b != null) {
 953                 b.close();
 954             }
 955         }
 956     }
 957
 958 }