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

   1 /*
   2  * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.cluster.raft;
  10
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertNotNull;
  13 import static org.junit.Assert.assertNull;
  14 import static org.junit.Assert.assertTrue;
  15 import static org.mockito.Matchers.any;
  16 import static org.mockito.Matchers.anyObject;
  17 import static org.mockito.Matchers.eq;
  18 import static org.mockito.Matchers.same;
  19 import static org.mockito.Mockito.doReturn;
  20 import static org.mockito.Mockito.mock;
  21 import static org.mockito.Mockito.times;
  22 import static org.mockito.Mockito.verify;
  23 import akka.actor.ActorRef;
  24 import akka.actor.PoisonPill;
  25 import akka.actor.Props;
  26 import akka.actor.Terminated;
  27 import akka.japi.Procedure;
  28 import akka.persistence.RecoveryCompleted;
  29 import akka.persistence.SaveSnapshotFailure;
  30 import akka.persistence.SaveSnapshotSuccess;
  31 import akka.persistence.SnapshotMetadata;
  32 import akka.persistence.SnapshotOffer;
  33 import akka.testkit.JavaTestKit;
  34 import akka.testkit.TestActorRef;
  35 import com.google.common.base.Optional;
  36 import com.google.common.collect.ImmutableMap;
  37 import com.google.common.util.concurrent.Uninterruptibles;
  38 import com.google.protobuf.ByteString;
  39 import java.io.ByteArrayOutputStream;
  40 import java.io.ObjectOutputStream;
  41 import java.util.ArrayList;
  42 import java.util.Arrays;
  43 import java.util.Collections;
  44 import java.util.HashMap;
  45 import java.util.List;
  46 import java.util.Map;
  47 import java.util.concurrent.TimeUnit;
  48 import org.junit.After;
  49 import org.junit.Before;
  50 import org.junit.Test;
  51 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  52 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  53 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  54 import org.opendaylight.controller.cluster.notifications.RoleChanged;
  55 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  56 import org.opendaylight.controller.cluster.raft.base.messages.ApplyLogEntries;
  57 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  58 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  59 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  60 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  61 import org.opendaylight.controller.cluster.raft.base.messages.DeleteEntries;
  62 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  63 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  64 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  65 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  66 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  67 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  68 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  69 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
  70 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  71 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  72 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  73 import org.slf4j.Logger;
  74 import org.slf4j.LoggerFactory;
  75 import scala.concurrent.duration.FiniteDuration;
  76
  77 public class RaftActorTest extends AbstractActorTest {
  78
  79     static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class);
  80
  81     private TestActorFactory factory;
  82
  83     @Before
  84     public void setUp(){
  85         factory = new TestActorFactory(getSystem());
  86     }
  87
  88     @After
  89     public void tearDown() throws Exception {
  90         factory.close();
  91         InMemoryJournal.clear();
  92         InMemorySnapshotStore.clear();
  93     }
  94
  95     @Test
  96     public void testConstruction() {
  97         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
  98     }
  99
 100     @Test
 101     public void testFindLeaderWhenLeaderIsSelf(){
 102         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
 103         kit.waitUntilLeader();
 104     }
 105
 106     @Test
 107     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
 108         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting");
 109
 110         new JavaTestKit(getSystem()) {{
 111             String persistenceId = factory.generateActorId("follower-");
 112
 113             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 114
 115             // Set the heartbeat interval high to essentially disable election otherwise the test
 116             // may fail if the actor is switched to Leader and the commitIndex is set to the last
 117             // log entry.
 118             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 119
 120             ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 121             ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 122                     peerAddresses, Optional.<ConfigParams>of(config)), persistenceId);
 123
 124             watch(followerActor);
 125
 126             List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 127             ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 128                     new MockRaftActorContext.MockPayload("E"));
 129             snapshotUnappliedEntries.add(entry1);
 130
 131             int lastAppliedDuringSnapshotCapture = 3;
 132             int lastIndexDuringSnapshotCapture = 4;
 133
 134             // 4 messages as part of snapshot, which are applied to state
 135             ByteString snapshotBytes = fromObject(Arrays.asList(
 136                     new MockRaftActorContext.MockPayload("A"),
 137                     new MockRaftActorContext.MockPayload("B"),
 138                     new MockRaftActorContext.MockPayload("C"),
 139                     new MockRaftActorContext.MockPayload("D")));
 140
 141             Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 142                     snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 143                     lastAppliedDuringSnapshotCapture, 1);
 144             InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 145
 146             // add more entries after snapshot is taken
 147             List<ReplicatedLogEntry> entries = new ArrayList<>();
 148             ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 149                     new MockRaftActorContext.MockPayload("F", 2));
 150             ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 151                     new MockRaftActorContext.MockPayload("G", 3));
 152             ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 153                     new MockRaftActorContext.MockPayload("H", 4));
 154             entries.add(entry2);
 155             entries.add(entry3);
 156             entries.add(entry4);
 157
 158             int lastAppliedToState = 5;
 159             int lastIndex = 7;
 160
 161             InMemoryJournal.addEntry(persistenceId, 5, entry2);
 162             // 2 entries are applied to state besides the 4 entries in snapshot
 163             InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 164             InMemoryJournal.addEntry(persistenceId, 7, entry3);
 165             InMemoryJournal.addEntry(persistenceId, 8, entry4);
 166
 167             // kill the actor
 168             followerActor.tell(PoisonPill.getInstance(), null);
 169             expectMsgClass(duration("5 seconds"), Terminated.class);
 170
 171             unwatch(followerActor);
 172
 173             //reinstate the actor
 174             TestActorRef<MockRaftActor> ref = factory.createTestActor(
 175                     MockRaftActor.props(persistenceId, peerAddresses, Optional.<ConfigParams>of(config)));
 176
 177             MockRaftActor mockRaftActor = ref.underlyingActor();
 178
 179             mockRaftActor.waitForRecoveryComplete();
 180
 181             RaftActorContext context = mockRaftActor.getRaftActorContext();
 182             assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 183                     context.getReplicatedLog().size());
 184             assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 185             assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 186             assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 187             assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 188             assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 189
 190             mockRaftActor.waitForInitializeBehaviorComplete();
 191
 192             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 193         }};
 194
 195         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending");
 196     }
 197
 198     @Test
 199     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 200         new JavaTestKit(getSystem()) {{
 201             String persistenceId = factory.generateActorId("follower-");
 202
 203             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 204
 205             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 206
 207             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 208                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 209                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()), persistenceId);
 210
 211             MockRaftActor mockRaftActor = ref.underlyingActor();
 212
 213             mockRaftActor.waitForRecoveryComplete();
 214
 215             mockRaftActor.waitForInitializeBehaviorComplete();
 216
 217             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 218         }};
 219     }
 220
 221     @Test
 222     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 223         String persistenceId = factory.generateActorId("leader-");
 224
 225         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 226
 227         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 228
 229         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 230                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
 231
 232         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 233
 234         // Wait for akka's recovery to complete so it doesn't interfere.
 235         mockRaftActor.waitForRecoveryComplete();
 236
 237         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 238         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 239
 240         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 241         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 242         mockRaftActor.handleRecover(snapshotOffer);
 243
 244         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 245                 1, new MockRaftActorContext.MockPayload("1", 5));
 246         mockRaftActor.handleRecover(logEntry);
 247
 248         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 249         mockRaftActor.handleRecover(applyJournalEntries);
 250
 251         ApplyLogEntries applyLogEntries = new ApplyLogEntries(0);
 252         mockRaftActor.handleRecover(applyLogEntries);
 253
 254         DeleteEntries deleteEntries = new DeleteEntries(1);
 255         mockRaftActor.handleRecover(deleteEntries);
 256
 257         org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries deprecatedDeleteEntries =
 258                 new org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries(1);
 259         mockRaftActor.handleRecover(deprecatedDeleteEntries);
 260
 261         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 262         mockRaftActor.handleRecover(updateElectionTerm);
 263
 264         org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm deprecatedUpdateElectionTerm =
 265                 new org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm(6, "member3");
 266         mockRaftActor.handleRecover(deprecatedUpdateElectionTerm);
 267
 268         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer));
 269         verify(mockSupport).handleRecoveryMessage(same(logEntry));
 270         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries));
 271         verify(mockSupport).handleRecoveryMessage(same(applyLogEntries));
 272         verify(mockSupport).handleRecoveryMessage(same(deleteEntries));
 273         verify(mockSupport).handleRecoveryMessage(same(deprecatedDeleteEntries));
 274         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm));
 275         verify(mockSupport).handleRecoveryMessage(same(deprecatedUpdateElectionTerm));
 276     }
 277
 278     @Test
 279     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 280         String persistenceId = factory.generateActorId("leader-");
 281
 282         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 283
 284         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 285
 286         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 287
 288         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 289                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), mockSupport), persistenceId);
 290
 291         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 292
 293         // Wait for akka's recovery to complete so it doesn't interfere.
 294         mockRaftActor.waitForRecoveryComplete();
 295
 296         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 297         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot));
 298         mockRaftActor.handleCommand(applySnapshot);
 299
 300         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 301         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 302         mockRaftActor.handleCommand(captureSnapshot);
 303
 304         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 305         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 306         mockRaftActor.handleCommand(captureSnapshotReply);
 307
 308         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(mock(SnapshotMetadata.class));
 309         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 310         mockRaftActor.handleCommand(saveSnapshotSuccess);
 311
 312         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(mock(SnapshotMetadata.class), new Throwable());
 313         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 314         mockRaftActor.handleCommand(saveSnapshotFailure);
 315
 316         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 317         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 318
 319         verify(mockSupport).handleSnapshotMessage(same(applySnapshot));
 320         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 321         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 322         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 323         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 324         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 325     }
 326
 327     @Test
 328     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 329         new JavaTestKit(getSystem()) {
 330             {
 331                 String persistenceId = factory.generateActorId("leader-");
 332
 333                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 334
 335                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 336
 337                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 338
 339                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 340                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 341
 342                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 343
 344                 mockRaftActor.waitForInitializeBehaviorComplete();
 345
 346                 mockRaftActor.waitUntilLeader();
 347
 348                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 349
 350                 verify(dataPersistenceProvider, times(2)).persist(anyObject(), any(Procedure.class));
 351
 352             }
 353
 354         };
 355     }
 356
 357     @Test
 358     public void testApplyState() throws Exception {
 359
 360         new JavaTestKit(getSystem()) {
 361             {
 362                 String persistenceId = factory.generateActorId("leader-");
 363
 364                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 365
 366                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 367
 368                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 369
 370                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 371                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 372
 373                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 374
 375                 mockRaftActor.waitForInitializeBehaviorComplete();
 376
 377                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 378                         new MockRaftActorContext.MockPayload("F"));
 379
 380                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
 381
 382                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
 383
 384             }
 385         };
 386     }
 387
 388     @Test
 389     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 390         new JavaTestKit(getSystem()) {{
 391             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 392                     Props.create(MessageCollectorActor.class));
 393             MessageCollectorActor.waitUntilReady(notifierActor);
 394
 395             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 396             long heartBeatInterval = 100;
 397             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 398             config.setElectionTimeoutFactor(20);
 399
 400             String persistenceId = factory.generateActorId("notifier-");
 401
 402             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 403                     Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor,
 404                     new NonPersistentDataProvider()), persistenceId);
 405
 406             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 407
 408
 409             // check if the notifier got a role change from null to Follower
 410             RoleChanged raftRoleChanged = matches.get(0);
 411             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 412             assertNull(raftRoleChanged.getOldRole());
 413             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 414
 415             // check if the notifier got a role change from Follower to Candidate
 416             raftRoleChanged = matches.get(1);
 417             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 418             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 419             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 420
 421             // check if the notifier got a role change from Candidate to Leader
 422             raftRoleChanged = matches.get(2);
 423             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 424             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 425             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 426
 427             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 428                     notifierActor, LeaderStateChanged.class);
 429
 430             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 431             assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 432
 433             notifierActor.underlyingActor().clear();
 434
 435             MockRaftActor raftActor = raftActorRef.underlyingActor();
 436             final String newLeaderId = "new-leader";
 437             final short newLeaderVersion = 6;
 438             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 439                 @Override
 440                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 441                     leaderId = newLeaderId;
 442                     setLeaderPayloadVersion(newLeaderVersion);
 443                     return this;
 444                 }
 445             };
 446
 447             raftActor.changeCurrentBehavior(follower);
 448
 449             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 450             assertEquals(persistenceId, leaderStateChange.getMemberId());
 451             assertEquals(null, leaderStateChange.getLeaderId());
 452
 453             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 454             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 455             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 456
 457             notifierActor.underlyingActor().clear();
 458
 459             raftActor.handleCommand("any");
 460
 461             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 462             assertEquals(persistenceId, leaderStateChange.getMemberId());
 463             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 464             assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 465
 466             notifierActor.underlyingActor().clear();
 467
 468             raftActor.handleCommand("any");
 469
 470             Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 471             leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 472             assertNull(leaderStateChange);
 473         }};
 474     }
 475
 476     @Test
 477     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 478         new JavaTestKit(getSystem()) {{
 479             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 480             MessageCollectorActor.waitUntilReady(notifierActor);
 481
 482             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 483             long heartBeatInterval = 100;
 484             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 485             config.setElectionTimeoutFactor(1);
 486
 487             String persistenceId = factory.generateActorId("notifier-");
 488
 489             factory.createActor(MockRaftActor.props(persistenceId,
 490                     ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
 491
 492             List<RoleChanged> matches =  null;
 493             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 494                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 495                 assertNotNull(matches);
 496                 if(matches.size() == 3) {
 497                     break;
 498                 }
 499                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 500             }
 501
 502             assertNotNull(matches);
 503             assertEquals(2, matches.size());
 504
 505             // check if the notifier got a role change from null to Follower
 506             RoleChanged raftRoleChanged = matches.get(0);
 507             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 508             assertNull(raftRoleChanged.getOldRole());
 509             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 510
 511             // check if the notifier got a role change from Follower to Candidate
 512             raftRoleChanged = matches.get(1);
 513             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 514             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 515             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 516
 517         }};
 518     }
 519
 520     @Test
 521     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 522         new JavaTestKit(getSystem()) {
 523             {
 524                 String persistenceId = factory.generateActorId("leader-");
 525                 String follower1Id = factory.generateActorId("follower-");
 526
 527                 ActorRef followerActor1 =
 528                         factory.createActor(Props.create(MessageCollectorActor.class));
 529
 530                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 531                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 532                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 533
 534                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 535
 536                 Map<String, String> peerAddresses = new HashMap<>();
 537                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 538
 539                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 540                         MockRaftActor.props(persistenceId, peerAddresses,
 541                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 542
 543                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 544
 545                 leaderActor.getRaftActorContext().setCommitIndex(4);
 546                 leaderActor.getRaftActorContext().setLastApplied(4);
 547                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 548
 549                 leaderActor.waitForInitializeBehaviorComplete();
 550
 551                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 552
 553                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 554                 leaderActor.setCurrentBehavior(leader);
 555                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 556
 557                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 558                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 559
 560                 assertEquals(8, leaderActor.getReplicatedLog().size());
 561
 562                 leaderActor.getRaftActorContext().getSnapshotManager()
 563                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 564                                 new MockRaftActorContext.MockPayload("x")), 4);
 565
 566                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 567
 568                 assertEquals(8, leaderActor.getReplicatedLog().size());
 569
 570                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 571                 //fake snapshot on index 5
 572                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 573
 574                 assertEquals(8, leaderActor.getReplicatedLog().size());
 575
 576                 //fake snapshot on index 6
 577                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 578                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 579                 assertEquals(8, leaderActor.getReplicatedLog().size());
 580
 581                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 582
 583                 assertEquals(8, leaderActor.getReplicatedLog().size());
 584
 585                 ByteString snapshotBytes = fromObject(Arrays.asList(
 586                         new MockRaftActorContext.MockPayload("foo-0"),
 587                         new MockRaftActorContext.MockPayload("foo-1"),
 588                         new MockRaftActorContext.MockPayload("foo-2"),
 589                         new MockRaftActorContext.MockPayload("foo-3"),
 590                         new MockRaftActorContext.MockPayload("foo-4")));
 591
 592                 leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 593                         leader, Runtime.getRuntime().totalMemory());
 594
 595                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 596
 597                 // The commit is needed to complete the snapshot creation process
 598                 leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, leader);
 599
 600                 // capture snapshot reply should remove the snapshotted entries only
 601                 assertEquals(3, leaderActor.getReplicatedLog().size());
 602                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 603
 604                 // add another non-replicated entry
 605                 leaderActor.getReplicatedLog().append(
 606                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 607
 608                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 609                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 610                 assertEquals(2, leaderActor.getReplicatedLog().size());
 611                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 612
 613             }
 614         };
 615     }
 616
 617     @Test
 618     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 619         new JavaTestKit(getSystem()) {
 620             {
 621                 String persistenceId = factory.generateActorId("follower-");
 622                 String leaderId = factory.generateActorId("leader-");
 623
 624
 625                 ActorRef leaderActor1 =
 626                         factory.createActor(Props.create(MessageCollectorActor.class));
 627
 628                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 629                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 630                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 631
 632                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 633
 634                 Map<String, String> peerAddresses = new HashMap<>();
 635                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 636
 637                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 638                         MockRaftActor.props(persistenceId, peerAddresses,
 639                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 640
 641                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 642                 followerActor.getRaftActorContext().setCommitIndex(4);
 643                 followerActor.getRaftActorContext().setLastApplied(4);
 644                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 645
 646                 followerActor.waitForInitializeBehaviorComplete();
 647
 648
 649                 Follower follower = new Follower(followerActor.getRaftActorContext());
 650                 followerActor.setCurrentBehavior(follower);
 651                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 652
 653                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 654                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 655                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 656
 657                 // log has indices 0-5
 658                 assertEquals(6, followerActor.getReplicatedLog().size());
 659
 660                 //snapshot on 4
 661                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 662                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 663                                 new MockRaftActorContext.MockPayload("D")), 4);
 664
 665                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 666
 667                 assertEquals(6, followerActor.getReplicatedLog().size());
 668
 669                 //fake snapshot on index 6
 670                 List<ReplicatedLogEntry> entries =
 671                         Arrays.asList(
 672                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 673                                         new MockRaftActorContext.MockPayload("foo-6"))
 674                         );
 675                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 676                 assertEquals(7, followerActor.getReplicatedLog().size());
 677
 678                 //fake snapshot on index 7
 679                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 680
 681                 entries =
 682                         Arrays.asList(
 683                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 684                                         new MockRaftActorContext.MockPayload("foo-7"))
 685                         );
 686                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 687                 assertEquals(8, followerActor.getReplicatedLog().size());
 688
 689                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 690
 691
 692                 ByteString snapshotBytes = fromObject(Arrays.asList(
 693                         new MockRaftActorContext.MockPayload("foo-0"),
 694                         new MockRaftActorContext.MockPayload("foo-1"),
 695                         new MockRaftActorContext.MockPayload("foo-2"),
 696                         new MockRaftActorContext.MockPayload("foo-3"),
 697                         new MockRaftActorContext.MockPayload("foo-4")));
 698                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 699                 assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 700
 701                 // The commit is needed to complete the snapshot creation process
 702                 followerActor.getRaftActorContext().getSnapshotManager().commit(-1, follower);
 703
 704                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 705                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 706                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 707
 708                 entries =
 709                         Arrays.asList(
 710                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 711                                         new MockRaftActorContext.MockPayload("foo-7"))
 712                         );
 713                 // send an additional entry 8 with leaderCommit = 7
 714                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 715
 716                 // 7 and 8, as lastapplied is 7
 717                 assertEquals(2, followerActor.getReplicatedLog().size());
 718
 719             }
 720         };
 721     }
 722
 723     @Test
 724     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 725         new JavaTestKit(getSystem()) {
 726             {
 727                 String persistenceId = factory.generateActorId("leader-");
 728                 String follower1Id = factory.generateActorId("follower-");
 729                 String follower2Id = factory.generateActorId("follower-");
 730
 731                 ActorRef followerActor1 =
 732                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 733                 ActorRef followerActor2 =
 734                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 735
 736                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 737                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 738                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 739
 740                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 741
 742                 Map<String, String> peerAddresses = new HashMap<>();
 743                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 744                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 745
 746                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 747                         MockRaftActor.props(persistenceId, peerAddresses,
 748                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 749
 750                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 751                 leaderActor.getRaftActorContext().setCommitIndex(9);
 752                 leaderActor.getRaftActorContext().setLastApplied(9);
 753                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 754
 755                 leaderActor.waitForInitializeBehaviorComplete();
 756
 757                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 758                 leaderActor.setCurrentBehavior(leader);
 759                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 760
 761                 // create 5 entries in the log
 762                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 763                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 764
 765                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 766                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 767                 //setting replicatedToAllIndex = 9, for the log to clear
 768                 leader.setReplicatedToAllIndex(9);
 769                 assertEquals(5, leaderActor.getReplicatedLog().size());
 770                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 771
 772                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 773                 assertEquals(5, leaderActor.getReplicatedLog().size());
 774                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 775
 776                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 777                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 778                 assertEquals(5, leaderActor.getReplicatedLog().size());
 779                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 780
 781                 // simulate a real snapshot
 782                 leaderActor.onReceiveCommand(new SendHeartBeat());
 783                 assertEquals(5, leaderActor.getReplicatedLog().size());
 784                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 785                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 786                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 787
 788
 789                 //reply from a slow follower does not initiate a fake snapshot
 790                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 791                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 792
 793                 ByteString snapshotBytes = fromObject(Arrays.asList(
 794                         new MockRaftActorContext.MockPayload("foo-0"),
 795                         new MockRaftActorContext.MockPayload("foo-1"),
 796                         new MockRaftActorContext.MockPayload("foo-2"),
 797                         new MockRaftActorContext.MockPayload("foo-3"),
 798                         new MockRaftActorContext.MockPayload("foo-4")));
 799                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 800                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 801
 802                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 803
 804                 //reply from a slow follower after should not raise errors
 805                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 806                 assertEquals(0, leaderActor.getReplicatedLog().size());
 807             }
 808         };
 809     }
 810
 811     @Test
 812     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 813         new JavaTestKit(getSystem()) {{
 814             String persistenceId = factory.generateActorId("leader-");
 815             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 816             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 817             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 818             config.setSnapshotBatchCount(5);
 819
 820             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 821
 822             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 823
 824             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 825                     MockRaftActor.props(persistenceId, peerAddresses,
 826                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 827
 828             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 829             leaderActor.getRaftActorContext().setCommitIndex(3);
 830             leaderActor.getRaftActorContext().setLastApplied(3);
 831             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 832
 833             leaderActor.waitForInitializeBehaviorComplete();
 834             for(int i=0;i< 4;i++) {
 835                 leaderActor.getReplicatedLog()
 836                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 837                                 new MockRaftActorContext.MockPayload("A")));
 838             }
 839
 840             Leader leader = new Leader(leaderActor.getRaftActorContext());
 841             leaderActor.setCurrentBehavior(leader);
 842             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 843
 844             // Simulate an install snaphost to a follower.
 845             leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 846                     leaderActor.getReplicatedLog().last(), -1, "member1");
 847
 848             // Now send a CaptureSnapshotReply
 849             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 850
 851             // Trimming log in this scenario is a no-op
 852             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 853             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 854             assertEquals(-1, leader.getReplicatedToAllIndex());
 855
 856         }};
 857     }
 858
 859     @Test
 860     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 861         new JavaTestKit(getSystem()) {{
 862             String persistenceId = factory.generateActorId("leader-");
 863             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 864             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 865             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 866             config.setSnapshotBatchCount(5);
 867
 868             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 869
 870             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 871
 872             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 873                     MockRaftActor.props(persistenceId, peerAddresses,
 874                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 875
 876             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 877             leaderActor.getRaftActorContext().setCommitIndex(3);
 878             leaderActor.getRaftActorContext().setLastApplied(3);
 879             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 880             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 881
 882             leaderActor.waitForInitializeBehaviorComplete();
 883             Leader leader = new Leader(leaderActor.getRaftActorContext());
 884             leaderActor.setCurrentBehavior(leader);
 885             leader.setReplicatedToAllIndex(3);
 886             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 887
 888             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 889             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 890
 891             // Now send a CaptureSnapshotReply
 892             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 893
 894             // Trimming log in this scenario is a no-op
 895             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 896             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 897             assertEquals(3, leader.getReplicatedToAllIndex());
 898
 899         }};
 900     }
 901
 902     @Test
 903     public void testSwitchBehavior(){
 904         String persistenceId = factory.generateActorId("leader-");
 905         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 906         config.setCustomRaftPolicyImplementationClass("org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 907         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 908         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 909         config.setSnapshotBatchCount(5);
 910
 911         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 912
 913         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 914
 915         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 916                 MockRaftActor.props(persistenceId, peerAddresses,
 917                         Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 918
 919         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 920
 921         leaderActor.handleRecover(RecoveryCompleted.getInstance());
 922
 923         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 924
 925         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 926         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 927
 928         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 929
 930         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 931         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 932
 933         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 934
 935         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 936         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 937
 938         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 939
 940         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 941         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 942
 943
 944     }
 945
 946     public static ByteString fromObject(Object snapshot) throws Exception {
 947         ByteArrayOutputStream b = null;
 948         ObjectOutputStream o = null;
 949         try {
 950             b = new ByteArrayOutputStream();
 951             o = new ObjectOutputStream(b);
 952             o.writeObject(snapshot);
 953             byte[] snapshotBytes = b.toByteArray();
 954             return ByteString.copyFrom(snapshotBytes);
 955         } finally {
 956             if (o != null) {
 957                 o.flush();
 958                 o.close();
 959             }
 960             if (b != null) {
 961                 b.close();
 962             }
 963         }
 964     }
 965
 966 }