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.verify;
  22 import akka.actor.ActorRef;
  23 import akka.actor.PoisonPill;
  24 import akka.actor.Props;
  25 import akka.actor.Terminated;
  26 import akka.dispatch.Dispatchers;
  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.PersistentDataProvider;
  54 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  55 import org.opendaylight.controller.cluster.notifications.RoleChanged;
  56 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  57 import org.opendaylight.controller.cluster.raft.base.messages.ApplyLogEntries;
  58 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  59 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  60 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  61 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  62 import org.opendaylight.controller.cluster.raft.base.messages.DeleteEntries;
  63 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
  64 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  65 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  66 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  67 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  68 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  69 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  70 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
  71 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  72 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  73 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  74 import org.slf4j.Logger;
  75 import org.slf4j.LoggerFactory;
  76 import scala.concurrent.duration.FiniteDuration;
  77
  78 public class RaftActorTest extends AbstractActorTest {
  79
  80     static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class);
  81
  82     private TestActorFactory factory;
  83
  84     @Before
  85     public void setUp(){
  86         factory = new TestActorFactory(getSystem());
  87     }
  88
  89     @After
  90     public void tearDown() throws Exception {
  91         factory.close();
  92         InMemoryJournal.clear();
  93         InMemorySnapshotStore.clear();
  94     }
  95
  96     @Test
  97     public void testConstruction() {
  98         new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
  99     }
 100
 101     @Test
 102     public void testFindLeaderWhenLeaderIsSelf(){
 103         RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
 104         kit.waitUntilLeader();
 105     }
 106
 107     @Test
 108     public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception {
 109         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting");
 110
 111         new JavaTestKit(getSystem()) {{
 112             String persistenceId = factory.generateActorId("follower-");
 113
 114             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 115
 116             // Set the heartbeat interval high to essentially disable election otherwise the test
 117             // may fail if the actor is switched to Leader and the commitIndex is set to the last
 118             // log entry.
 119             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 120
 121             ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 122             ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
 123                     peerAddresses, Optional.<ConfigParams>of(config)), persistenceId);
 124
 125             watch(followerActor);
 126
 127             List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
 128             ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
 129                     new MockRaftActorContext.MockPayload("E"));
 130             snapshotUnappliedEntries.add(entry1);
 131
 132             int lastAppliedDuringSnapshotCapture = 3;
 133             int lastIndexDuringSnapshotCapture = 4;
 134
 135             // 4 messages as part of snapshot, which are applied to state
 136             ByteString snapshotBytes = fromObject(Arrays.asList(
 137                     new MockRaftActorContext.MockPayload("A"),
 138                     new MockRaftActorContext.MockPayload("B"),
 139                     new MockRaftActorContext.MockPayload("C"),
 140                     new MockRaftActorContext.MockPayload("D")));
 141
 142             Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
 143                     snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
 144                     lastAppliedDuringSnapshotCapture, 1);
 145             InMemorySnapshotStore.addSnapshot(persistenceId, snapshot);
 146
 147             // add more entries after snapshot is taken
 148             List<ReplicatedLogEntry> entries = new ArrayList<>();
 149             ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 150                     new MockRaftActorContext.MockPayload("F", 2));
 151             ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 152                     new MockRaftActorContext.MockPayload("G", 3));
 153             ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 154                     new MockRaftActorContext.MockPayload("H", 4));
 155             entries.add(entry2);
 156             entries.add(entry3);
 157             entries.add(entry4);
 158
 159             int lastAppliedToState = 5;
 160             int lastIndex = 7;
 161
 162             InMemoryJournal.addEntry(persistenceId, 5, entry2);
 163             // 2 entries are applied to state besides the 4 entries in snapshot
 164             InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState));
 165             InMemoryJournal.addEntry(persistenceId, 7, entry3);
 166             InMemoryJournal.addEntry(persistenceId, 8, entry4);
 167
 168             // kill the actor
 169             followerActor.tell(PoisonPill.getInstance(), null);
 170             expectMsgClass(duration("5 seconds"), Terminated.class);
 171
 172             unwatch(followerActor);
 173
 174             //reinstate the actor
 175             TestActorRef<MockRaftActor> ref = factory.createTestActor(
 176                     MockRaftActor.props(persistenceId, peerAddresses, Optional.<ConfigParams>of(config)));
 177
 178             MockRaftActor mockRaftActor = ref.underlyingActor();
 179
 180             mockRaftActor.waitForRecoveryComplete();
 181
 182             RaftActorContext context = mockRaftActor.getRaftActorContext();
 183             assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
 184                     context.getReplicatedLog().size());
 185             assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize());
 186             assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
 187             assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
 188             assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
 189             assertEquals("Recovered state size", 6, mockRaftActor.getState().size());
 190
 191             mockRaftActor.waitForInitializeBehaviorComplete();
 192
 193             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 194         }};
 195
 196         TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending");
 197     }
 198
 199     @Test
 200     public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception {
 201         new JavaTestKit(getSystem()) {{
 202             String persistenceId = factory.generateActorId("follower-");
 203
 204             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 205
 206             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 207
 208             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 209                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 210                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()), persistenceId);
 211
 212             MockRaftActor mockRaftActor = ref.underlyingActor();
 213
 214             mockRaftActor.waitForRecoveryComplete();
 215
 216             mockRaftActor.waitForInitializeBehaviorComplete();
 217
 218             assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState());
 219         }};
 220     }
 221
 222     @Test
 223     public void testUpdateElectionTermPersistedWithPersistenceDisabled() throws Exception {
 224         new JavaTestKit(getSystem()) {{
 225             String persistenceId = factory.generateActorId("follower-");
 226             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 227             config.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 228             config.setElectionTimeoutFactor(1);
 229
 230             InMemoryJournal.addWriteMessagesCompleteLatch(persistenceId, 1);
 231
 232             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 233                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 234                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()).
 235                             withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
 236
 237             InMemoryJournal.waitForWriteMessagesComplete(persistenceId);
 238             List<UpdateElectionTerm> entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 239             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 240             UpdateElectionTerm updateEntry = entries.get(0);
 241
 242             factory.killActor(ref, this);
 243
 244             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 245             ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 246                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 247                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()).
 248                             withDispatcher(Dispatchers.DefaultDispatcherId()),
 249                             factory.generateActorId("follower-"));
 250
 251             MockRaftActor actor = ref.underlyingActor();
 252             actor.waitForRecoveryComplete();
 253
 254             RaftActorContext newContext = actor.getRaftActorContext();
 255             assertEquals("electionTerm", updateEntry.getCurrentTerm(),
 256                     newContext.getTermInformation().getCurrentTerm());
 257             assertEquals("votedFor", updateEntry.getVotedFor(), newContext.getTermInformation().getVotedFor());
 258
 259             entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 260             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 261         }};
 262     }
 263
 264     @Test
 265     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 266         String persistenceId = factory.generateActorId("leader-");
 267
 268         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 269
 270         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 271
 272         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 273                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
 274
 275         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 276
 277         // Wait for akka's recovery to complete so it doesn't interfere.
 278         mockRaftActor.waitForRecoveryComplete();
 279
 280         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 281         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 282
 283         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 284         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 285         mockRaftActor.handleRecover(snapshotOffer);
 286
 287         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 288                 1, new MockRaftActorContext.MockPayload("1", 5));
 289         mockRaftActor.handleRecover(logEntry);
 290
 291         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 292         mockRaftActor.handleRecover(applyJournalEntries);
 293
 294         ApplyLogEntries applyLogEntries = new ApplyLogEntries(0);
 295         mockRaftActor.handleRecover(applyLogEntries);
 296
 297         DeleteEntries deleteEntries = new DeleteEntries(1);
 298         mockRaftActor.handleRecover(deleteEntries);
 299
 300         org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries deprecatedDeleteEntries =
 301                 new org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries(1);
 302         mockRaftActor.handleRecover(deprecatedDeleteEntries);
 303
 304         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 305         mockRaftActor.handleRecover(updateElectionTerm);
 306
 307         org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm deprecatedUpdateElectionTerm =
 308                 new org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm(6, "member3");
 309         mockRaftActor.handleRecover(deprecatedUpdateElectionTerm);
 310
 311         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer), any(PersistentDataProvider.class));
 312         verify(mockSupport).handleRecoveryMessage(same(logEntry), any(PersistentDataProvider.class));
 313         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries), any(PersistentDataProvider.class));
 314         verify(mockSupport).handleRecoveryMessage(same(applyLogEntries), any(PersistentDataProvider.class));
 315         verify(mockSupport).handleRecoveryMessage(same(deleteEntries), any(PersistentDataProvider.class));
 316         verify(mockSupport).handleRecoveryMessage(same(deprecatedDeleteEntries), any(PersistentDataProvider.class));
 317         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm), any(PersistentDataProvider.class));
 318         verify(mockSupport).handleRecoveryMessage(same(deprecatedUpdateElectionTerm), any(PersistentDataProvider.class));
 319     }
 320
 321     @Test
 322     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 323         String persistenceId = factory.generateActorId("leader-");
 324
 325         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 326
 327         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 328
 329         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 330
 331         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 332                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), mockSupport), persistenceId);
 333
 334         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 335
 336         // Wait for akka's recovery to complete so it doesn't interfere.
 337         mockRaftActor.waitForRecoveryComplete();
 338
 339         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 340         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot));
 341         mockRaftActor.handleCommand(applySnapshot);
 342
 343         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 344         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 345         mockRaftActor.handleCommand(captureSnapshot);
 346
 347         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 348         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 349         mockRaftActor.handleCommand(captureSnapshotReply);
 350
 351         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(mock(SnapshotMetadata.class));
 352         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 353         mockRaftActor.handleCommand(saveSnapshotSuccess);
 354
 355         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(mock(SnapshotMetadata.class), new Throwable());
 356         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 357         mockRaftActor.handleCommand(saveSnapshotFailure);
 358
 359         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 360         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 361
 362         verify(mockSupport).handleSnapshotMessage(same(applySnapshot));
 363         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 364         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 365         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 366         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 367         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 368     }
 369
 370     @Test
 371     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 372         new JavaTestKit(getSystem()) {
 373             {
 374                 String persistenceId = factory.generateActorId("leader-");
 375
 376                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 377
 378                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 379
 380                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 381
 382                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 383                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 384
 385                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 386
 387                 mockRaftActor.waitForInitializeBehaviorComplete();
 388
 389                 mockRaftActor.waitUntilLeader();
 390
 391                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 392
 393                 verify(dataPersistenceProvider).persist(any(ApplyJournalEntries.class), any(Procedure.class));
 394
 395             }
 396
 397         };
 398     }
 399
 400     @Test
 401     public void testApplyState() throws Exception {
 402
 403         new JavaTestKit(getSystem()) {
 404             {
 405                 String persistenceId = factory.generateActorId("leader-");
 406
 407                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 408
 409                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 410
 411                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 412
 413                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 414                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 415
 416                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 417
 418                 mockRaftActor.waitForInitializeBehaviorComplete();
 419
 420                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 421                         new MockRaftActorContext.MockPayload("F"));
 422
 423                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
 424
 425                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
 426
 427             }
 428         };
 429     }
 430
 431     @Test
 432     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 433         new JavaTestKit(getSystem()) {{
 434             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 435                     Props.create(MessageCollectorActor.class));
 436             MessageCollectorActor.waitUntilReady(notifierActor);
 437
 438             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 439             long heartBeatInterval = 100;
 440             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 441             config.setElectionTimeoutFactor(20);
 442
 443             String persistenceId = factory.generateActorId("notifier-");
 444
 445             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 446                     Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor,
 447                     new NonPersistentDataProvider()).withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
 448
 449             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 450
 451
 452             // check if the notifier got a role change from null to Follower
 453             RoleChanged raftRoleChanged = matches.get(0);
 454             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 455             assertNull(raftRoleChanged.getOldRole());
 456             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 457
 458             // check if the notifier got a role change from Follower to Candidate
 459             raftRoleChanged = matches.get(1);
 460             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 461             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 462             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 463
 464             // check if the notifier got a role change from Candidate to Leader
 465             raftRoleChanged = matches.get(2);
 466             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 467             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 468             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 469
 470             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 471                     notifierActor, LeaderStateChanged.class);
 472
 473             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 474             assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 475
 476             notifierActor.underlyingActor().clear();
 477
 478             MockRaftActor raftActor = raftActorRef.underlyingActor();
 479             final String newLeaderId = "new-leader";
 480             final short newLeaderVersion = 6;
 481             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 482                 @Override
 483                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 484                     leaderId = newLeaderId;
 485                     setLeaderPayloadVersion(newLeaderVersion);
 486                     return this;
 487                 }
 488             };
 489
 490             raftActor.newBehavior(follower);
 491
 492             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 493             assertEquals(persistenceId, leaderStateChange.getMemberId());
 494             assertEquals(null, leaderStateChange.getLeaderId());
 495
 496             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 497             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 498             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 499
 500             notifierActor.underlyingActor().clear();
 501
 502             raftActor.handleCommand("any");
 503
 504             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 505             assertEquals(persistenceId, leaderStateChange.getMemberId());
 506             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 507             assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 508
 509             notifierActor.underlyingActor().clear();
 510
 511             raftActor.handleCommand("any");
 512
 513             Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 514             leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 515             assertNull(leaderStateChange);
 516         }};
 517     }
 518
 519     @Test
 520     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 521         new JavaTestKit(getSystem()) {{
 522             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 523             MessageCollectorActor.waitUntilReady(notifierActor);
 524
 525             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 526             long heartBeatInterval = 100;
 527             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 528             config.setElectionTimeoutFactor(1);
 529
 530             String persistenceId = factory.generateActorId("notifier-");
 531
 532             factory.createActor(MockRaftActor.props(persistenceId,
 533                     ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
 534
 535             List<RoleChanged> matches =  null;
 536             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 537                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 538                 assertNotNull(matches);
 539                 if(matches.size() == 3) {
 540                     break;
 541                 }
 542                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 543             }
 544
 545             assertNotNull(matches);
 546             assertEquals(2, matches.size());
 547
 548             // check if the notifier got a role change from null to Follower
 549             RoleChanged raftRoleChanged = matches.get(0);
 550             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 551             assertNull(raftRoleChanged.getOldRole());
 552             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 553
 554             // check if the notifier got a role change from Follower to Candidate
 555             raftRoleChanged = matches.get(1);
 556             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 557             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 558             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 559
 560         }};
 561     }
 562
 563     @Test
 564     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 565         new JavaTestKit(getSystem()) {
 566             {
 567                 String persistenceId = factory.generateActorId("leader-");
 568                 String follower1Id = factory.generateActorId("follower-");
 569
 570                 ActorRef followerActor1 =
 571                         factory.createActor(Props.create(MessageCollectorActor.class));
 572
 573                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 574                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 575                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 576
 577                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 578
 579                 Map<String, String> peerAddresses = new HashMap<>();
 580                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 581
 582                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 583                         MockRaftActor.props(persistenceId, peerAddresses,
 584                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 585
 586                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 587
 588                 leaderActor.getRaftActorContext().setCommitIndex(4);
 589                 leaderActor.getRaftActorContext().setLastApplied(4);
 590                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 591
 592                 leaderActor.waitForInitializeBehaviorComplete();
 593
 594                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 595
 596                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 597                 leaderActor.setCurrentBehavior(leader);
 598                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 599
 600                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 601                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 602
 603                 assertEquals(8, leaderActor.getReplicatedLog().size());
 604
 605                 leaderActor.getRaftActorContext().getSnapshotManager()
 606                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 607                                 new MockRaftActorContext.MockPayload("x")), 4);
 608
 609                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 610
 611                 assertEquals(8, leaderActor.getReplicatedLog().size());
 612
 613                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 614                 //fake snapshot on index 5
 615                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 616
 617                 assertEquals(8, leaderActor.getReplicatedLog().size());
 618
 619                 //fake snapshot on index 6
 620                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 621                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 622                 assertEquals(8, leaderActor.getReplicatedLog().size());
 623
 624                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 625
 626                 assertEquals(8, leaderActor.getReplicatedLog().size());
 627
 628                 ByteString snapshotBytes = fromObject(Arrays.asList(
 629                         new MockRaftActorContext.MockPayload("foo-0"),
 630                         new MockRaftActorContext.MockPayload("foo-1"),
 631                         new MockRaftActorContext.MockPayload("foo-2"),
 632                         new MockRaftActorContext.MockPayload("foo-3"),
 633                         new MockRaftActorContext.MockPayload("foo-4")));
 634
 635                 leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 636                         leader, Runtime.getRuntime().totalMemory());
 637
 638                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 639
 640                 // The commit is needed to complete the snapshot creation process
 641                 leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, leader);
 642
 643                 // capture snapshot reply should remove the snapshotted entries only
 644                 assertEquals(3, leaderActor.getReplicatedLog().size());
 645                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 646
 647                 // add another non-replicated entry
 648                 leaderActor.getReplicatedLog().append(
 649                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 650
 651                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 652                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 653                 assertEquals(2, leaderActor.getReplicatedLog().size());
 654                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 655
 656             }
 657         };
 658     }
 659
 660     @Test
 661     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 662         new JavaTestKit(getSystem()) {
 663             {
 664                 String persistenceId = factory.generateActorId("follower-");
 665                 String leaderId = factory.generateActorId("leader-");
 666
 667
 668                 ActorRef leaderActor1 =
 669                         factory.createActor(Props.create(MessageCollectorActor.class));
 670
 671                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 672                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 673                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 674
 675                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 676
 677                 Map<String, String> peerAddresses = new HashMap<>();
 678                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 679
 680                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 681                         MockRaftActor.props(persistenceId, peerAddresses,
 682                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 683
 684                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 685                 followerActor.getRaftActorContext().setCommitIndex(4);
 686                 followerActor.getRaftActorContext().setLastApplied(4);
 687                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 688
 689                 followerActor.waitForInitializeBehaviorComplete();
 690
 691
 692                 Follower follower = new Follower(followerActor.getRaftActorContext());
 693                 followerActor.setCurrentBehavior(follower);
 694                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 695
 696                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 697                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 698                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 699
 700                 // log has indices 0-5
 701                 assertEquals(6, followerActor.getReplicatedLog().size());
 702
 703                 //snapshot on 4
 704                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 705                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 706                                 new MockRaftActorContext.MockPayload("D")), 4);
 707
 708                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 709
 710                 assertEquals(6, followerActor.getReplicatedLog().size());
 711
 712                 //fake snapshot on index 6
 713                 List<ReplicatedLogEntry> entries =
 714                         Arrays.asList(
 715                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 716                                         new MockRaftActorContext.MockPayload("foo-6"))
 717                         );
 718                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 719                 assertEquals(7, followerActor.getReplicatedLog().size());
 720
 721                 //fake snapshot on index 7
 722                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 723
 724                 entries =
 725                         Arrays.asList(
 726                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 727                                         new MockRaftActorContext.MockPayload("foo-7"))
 728                         );
 729                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 730                 assertEquals(8, followerActor.getReplicatedLog().size());
 731
 732                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 733
 734
 735                 ByteString snapshotBytes = fromObject(Arrays.asList(
 736                         new MockRaftActorContext.MockPayload("foo-0"),
 737                         new MockRaftActorContext.MockPayload("foo-1"),
 738                         new MockRaftActorContext.MockPayload("foo-2"),
 739                         new MockRaftActorContext.MockPayload("foo-3"),
 740                         new MockRaftActorContext.MockPayload("foo-4")));
 741                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 742                 assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 743
 744                 // The commit is needed to complete the snapshot creation process
 745                 followerActor.getRaftActorContext().getSnapshotManager().commit(-1, follower);
 746
 747                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 748                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 749                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 750
 751                 entries =
 752                         Arrays.asList(
 753                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 754                                         new MockRaftActorContext.MockPayload("foo-7"))
 755                         );
 756                 // send an additional entry 8 with leaderCommit = 7
 757                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 758
 759                 // 7 and 8, as lastapplied is 7
 760                 assertEquals(2, followerActor.getReplicatedLog().size());
 761
 762             }
 763         };
 764     }
 765
 766     @Test
 767     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 768         new JavaTestKit(getSystem()) {
 769             {
 770                 String persistenceId = factory.generateActorId("leader-");
 771                 String follower1Id = factory.generateActorId("follower-");
 772                 String follower2Id = factory.generateActorId("follower-");
 773
 774                 ActorRef followerActor1 =
 775                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 776                 ActorRef followerActor2 =
 777                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 778
 779                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 780                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 781                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 782
 783                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 784
 785                 Map<String, String> peerAddresses = new HashMap<>();
 786                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 787                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 788
 789                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 790                         MockRaftActor.props(persistenceId, peerAddresses,
 791                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 792
 793                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 794                 leaderActor.getRaftActorContext().setCommitIndex(9);
 795                 leaderActor.getRaftActorContext().setLastApplied(9);
 796                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 797
 798                 leaderActor.waitForInitializeBehaviorComplete();
 799
 800                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 801                 leaderActor.setCurrentBehavior(leader);
 802                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 803
 804                 // create 5 entries in the log
 805                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 806                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 807
 808                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 809                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 810                 //setting replicatedToAllIndex = 9, for the log to clear
 811                 leader.setReplicatedToAllIndex(9);
 812                 assertEquals(5, leaderActor.getReplicatedLog().size());
 813                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 814
 815                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 816                 assertEquals(5, leaderActor.getReplicatedLog().size());
 817                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 818
 819                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 820                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 821                 assertEquals(5, leaderActor.getReplicatedLog().size());
 822                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 823
 824                 // simulate a real snapshot
 825                 leaderActor.onReceiveCommand(new SendHeartBeat());
 826                 assertEquals(5, leaderActor.getReplicatedLog().size());
 827                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 828                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 829                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 830
 831
 832                 //reply from a slow follower does not initiate a fake snapshot
 833                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 834                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 835
 836                 ByteString snapshotBytes = fromObject(Arrays.asList(
 837                         new MockRaftActorContext.MockPayload("foo-0"),
 838                         new MockRaftActorContext.MockPayload("foo-1"),
 839                         new MockRaftActorContext.MockPayload("foo-2"),
 840                         new MockRaftActorContext.MockPayload("foo-3"),
 841                         new MockRaftActorContext.MockPayload("foo-4")));
 842                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 843                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 844
 845                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 846
 847                 //reply from a slow follower after should not raise errors
 848                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 849                 assertEquals(0, leaderActor.getReplicatedLog().size());
 850             }
 851         };
 852     }
 853
 854     @Test
 855     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 856         new JavaTestKit(getSystem()) {{
 857             String persistenceId = factory.generateActorId("leader-");
 858             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 859             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 860             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 861             config.setSnapshotBatchCount(5);
 862
 863             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 864
 865             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 866
 867             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 868                     MockRaftActor.props(persistenceId, peerAddresses,
 869                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 870
 871             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 872             leaderActor.getRaftActorContext().setCommitIndex(3);
 873             leaderActor.getRaftActorContext().setLastApplied(3);
 874             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 875
 876             leaderActor.waitForInitializeBehaviorComplete();
 877             for(int i=0;i< 4;i++) {
 878                 leaderActor.getReplicatedLog()
 879                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 880                                 new MockRaftActorContext.MockPayload("A")));
 881             }
 882
 883             Leader leader = new Leader(leaderActor.getRaftActorContext());
 884             leaderActor.setCurrentBehavior(leader);
 885             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 886
 887             // Simulate an install snaphost to a follower.
 888             leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 889                     leaderActor.getReplicatedLog().last(), -1, "member1");
 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(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 896             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 897             assertEquals(-1, leader.getReplicatedToAllIndex());
 898
 899         }};
 900     }
 901
 902     @Test
 903     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 904         new JavaTestKit(getSystem()) {{
 905             String persistenceId = factory.generateActorId("leader-");
 906             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 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().put("member1", "address").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             leaderActor.getRaftActorContext().setCommitIndex(3);
 921             leaderActor.getRaftActorContext().setLastApplied(3);
 922             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 923             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 924
 925             leaderActor.waitForInitializeBehaviorComplete();
 926             Leader leader = new Leader(leaderActor.getRaftActorContext());
 927             leaderActor.setCurrentBehavior(leader);
 928             leader.setReplicatedToAllIndex(3);
 929             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 930
 931             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 932             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 933
 934             // Now send a CaptureSnapshotReply
 935             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 936
 937             // Trimming log in this scenario is a no-op
 938             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 939             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 940             assertEquals(3, leader.getReplicatedToAllIndex());
 941
 942         }};
 943     }
 944
 945     @Test
 946     public void testSwitchBehavior(){
 947         String persistenceId = factory.generateActorId("leader-");
 948         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 949         config.setCustomRaftPolicyImplementationClass("org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 950         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 951         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 952         config.setSnapshotBatchCount(5);
 953
 954         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 955
 956         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 957
 958         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 959                 MockRaftActor.props(persistenceId, peerAddresses,
 960                         Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 961
 962         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 963
 964         leaderActor.handleRecover(RecoveryCompleted.getInstance());
 965
 966         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 967
 968         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 969         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 970
 971         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 972
 973         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 974         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 975
 976         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 977
 978         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 979         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 980
 981         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 982
 983         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 984         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 985
 986
 987     }
 988
 989     public static ByteString fromObject(Object snapshot) throws Exception {
 990         ByteArrayOutputStream b = null;
 991         ObjectOutputStream o = null;
 992         try {
 993             b = new ByteArrayOutputStream();
 994             o = new ObjectOutputStream(b);
 995             o.writeObject(snapshot);
 996             byte[] snapshotBytes = b.toByteArray();
 997             return ByteString.copyFrom(snapshotBytes);
 998         } finally {
 999             if (o != null) {
1000                 o.flush();
1001                 o.close();
1002             }
1003             if (b != null) {
1004                 b.close();
1005             }
1006         }
1007     }
1008
1009 }