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.SaveSnapshotFailure;
  29 import akka.persistence.SaveSnapshotSuccess;
  30 import akka.persistence.SnapshotMetadata;
  31 import akka.persistence.SnapshotOffer;
  32 import akka.testkit.JavaTestKit;
  33 import akka.testkit.TestActorRef;
  34 import com.google.common.base.Optional;
  35 import com.google.common.collect.ImmutableMap;
  36 import com.google.common.util.concurrent.Uninterruptibles;
  37 import com.google.protobuf.ByteString;
  38 import java.io.ByteArrayOutputStream;
  39 import java.io.ObjectOutputStream;
  40 import java.util.ArrayList;
  41 import java.util.Arrays;
  42 import java.util.Collections;
  43 import java.util.HashMap;
  44 import java.util.List;
  45 import java.util.Map;
  46 import java.util.concurrent.TimeUnit;
  47 import org.junit.After;
  48 import org.junit.Before;
  49 import org.junit.Test;
  50 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  51 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  52 import org.opendaylight.controller.cluster.PersistentDataProvider;
  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 testUpdateElectionTermPersistedWithPersistenceDisabled() throws Exception {
 223         new JavaTestKit(getSystem()) {{
 224             String persistenceId = factory.generateActorId("follower-");
 225             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 226             config.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 227             config.setElectionTimeoutFactor(1);
 228
 229             InMemoryJournal.addWriteMessagesCompleteLatch(persistenceId, 1);
 230
 231             TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 232                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 233                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()).
 234                             withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
 235
 236             InMemoryJournal.waitForWriteMessagesComplete(persistenceId);
 237             List<UpdateElectionTerm> entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 238             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 239             UpdateElectionTerm updateEntry = entries.get(0);
 240
 241             factory.killActor(ref, this);
 242
 243             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 244             ref = factory.createTestActor(MockRaftActor.props(persistenceId,
 245                     ImmutableMap.<String, String>builder().put("member1", "address").build(),
 246                     Optional.<ConfigParams>of(config), new NonPersistentDataProvider()).
 247                             withDispatcher(Dispatchers.DefaultDispatcherId()),
 248                             factory.generateActorId("follower-"));
 249
 250             MockRaftActor actor = ref.underlyingActor();
 251             actor.waitForRecoveryComplete();
 252
 253             RaftActorContext newContext = actor.getRaftActorContext();
 254             assertEquals("electionTerm", updateEntry.getCurrentTerm(),
 255                     newContext.getTermInformation().getCurrentTerm());
 256             assertEquals("votedFor", updateEntry.getVotedFor(), newContext.getTermInformation().getVotedFor());
 257
 258             entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class);
 259             assertEquals("UpdateElectionTerm entries", 1, entries.size());
 260         }};
 261     }
 262
 263     @Test
 264     public void testRaftActorForwardsToRaftActorRecoverySupport() {
 265         String persistenceId = factory.generateActorId("leader-");
 266
 267         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 268
 269         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 270
 271         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 272                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
 273
 274         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 275
 276         // Wait for akka's recovery to complete so it doesn't interfere.
 277         mockRaftActor.waitForRecoveryComplete();
 278
 279         RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class);
 280         mockRaftActor.setRaftActorRecoverySupport(mockSupport );
 281
 282         Snapshot snapshot = Snapshot.create(new byte[]{1}, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1);
 283         SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot);
 284         mockRaftActor.handleRecover(snapshotOffer);
 285
 286         MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1,
 287                 1, new MockRaftActorContext.MockPayload("1", 5));
 288         mockRaftActor.handleRecover(logEntry);
 289
 290         ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2);
 291         mockRaftActor.handleRecover(applyJournalEntries);
 292
 293         ApplyLogEntries applyLogEntries = new ApplyLogEntries(0);
 294         mockRaftActor.handleRecover(applyLogEntries);
 295
 296         DeleteEntries deleteEntries = new DeleteEntries(1);
 297         mockRaftActor.handleRecover(deleteEntries);
 298
 299         org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries deprecatedDeleteEntries =
 300                 new org.opendaylight.controller.cluster.raft.RaftActor.DeleteEntries(1);
 301         mockRaftActor.handleRecover(deprecatedDeleteEntries);
 302
 303         UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2");
 304         mockRaftActor.handleRecover(updateElectionTerm);
 305
 306         org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm deprecatedUpdateElectionTerm =
 307                 new org.opendaylight.controller.cluster.raft.RaftActor.UpdateElectionTerm(6, "member3");
 308         mockRaftActor.handleRecover(deprecatedUpdateElectionTerm);
 309
 310         verify(mockSupport).handleRecoveryMessage(same(snapshotOffer), any(PersistentDataProvider.class));
 311         verify(mockSupport).handleRecoveryMessage(same(logEntry), any(PersistentDataProvider.class));
 312         verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries), any(PersistentDataProvider.class));
 313         verify(mockSupport).handleRecoveryMessage(same(applyLogEntries), any(PersistentDataProvider.class));
 314         verify(mockSupport).handleRecoveryMessage(same(deleteEntries), any(PersistentDataProvider.class));
 315         verify(mockSupport).handleRecoveryMessage(same(deprecatedDeleteEntries), any(PersistentDataProvider.class));
 316         verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm), any(PersistentDataProvider.class));
 317         verify(mockSupport).handleRecoveryMessage(same(deprecatedUpdateElectionTerm), any(PersistentDataProvider.class));
 318     }
 319
 320     @Test
 321     public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() {
 322         String persistenceId = factory.generateActorId("leader-");
 323
 324         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 325
 326         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 327
 328         RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class);
 329
 330         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 331                 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), mockSupport), persistenceId);
 332
 333         MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 334
 335         // Wait for akka's recovery to complete so it doesn't interfere.
 336         mockRaftActor.waitForRecoveryComplete();
 337
 338         ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class));
 339         doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot));
 340         mockRaftActor.handleCommand(applySnapshot);
 341
 342         CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null);
 343         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 344         mockRaftActor.handleCommand(captureSnapshot);
 345
 346         CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]);
 347         doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 348         mockRaftActor.handleCommand(captureSnapshotReply);
 349
 350         SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(mock(SnapshotMetadata.class));
 351         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 352         mockRaftActor.handleCommand(saveSnapshotSuccess);
 353
 354         SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(mock(SnapshotMetadata.class), new Throwable());
 355         doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 356         mockRaftActor.handleCommand(saveSnapshotFailure);
 357
 358         doReturn(true).when(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 359         mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT);
 360
 361         verify(mockSupport).handleSnapshotMessage(same(applySnapshot));
 362         verify(mockSupport).handleSnapshotMessage(same(captureSnapshot));
 363         verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply));
 364         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess));
 365         verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure));
 366         verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT));
 367     }
 368
 369     @Test
 370     public void testApplyJournalEntriesCallsDataPersistence() throws Exception {
 371         new JavaTestKit(getSystem()) {
 372             {
 373                 String persistenceId = factory.generateActorId("leader-");
 374
 375                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 376
 377                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 378
 379                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 380
 381                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 382                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 383
 384                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 385
 386                 mockRaftActor.waitForInitializeBehaviorComplete();
 387
 388                 mockRaftActor.waitUntilLeader();
 389
 390                 mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10));
 391
 392                 verify(dataPersistenceProvider).persist(any(ApplyJournalEntries.class), any(Procedure.class));
 393
 394             }
 395
 396         };
 397     }
 398
 399     @Test
 400     public void testApplyState() throws Exception {
 401
 402         new JavaTestKit(getSystem()) {
 403             {
 404                 String persistenceId = factory.generateActorId("leader-");
 405
 406                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 407
 408                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 409
 410                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 411
 412                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 413                         Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 414
 415                 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
 416
 417                 mockRaftActor.waitForInitializeBehaviorComplete();
 418
 419                 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 420                         new MockRaftActorContext.MockPayload("F"));
 421
 422                 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
 423
 424                 verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
 425
 426             }
 427         };
 428     }
 429
 430     @Test
 431     public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception {
 432         new JavaTestKit(getSystem()) {{
 433             TestActorRef<MessageCollectorActor> notifierActor = factory.createTestActor(
 434                     Props.create(MessageCollectorActor.class));
 435             MessageCollectorActor.waitUntilReady(notifierActor);
 436
 437             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 438             long heartBeatInterval = 100;
 439             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 440             config.setElectionTimeoutFactor(20);
 441
 442             String persistenceId = factory.generateActorId("notifier-");
 443
 444             TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
 445                     Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor,
 446                     new NonPersistentDataProvider()).withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId);
 447
 448             List<RoleChanged> matches =  MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3);
 449
 450
 451             // check if the notifier got a role change from null to Follower
 452             RoleChanged raftRoleChanged = matches.get(0);
 453             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 454             assertNull(raftRoleChanged.getOldRole());
 455             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 456
 457             // check if the notifier got a role change from Follower to Candidate
 458             raftRoleChanged = matches.get(1);
 459             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 460             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 461             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 462
 463             // check if the notifier got a role change from Candidate to Leader
 464             raftRoleChanged = matches.get(2);
 465             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 466             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
 467             assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
 468
 469             LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(
 470                     notifierActor, LeaderStateChanged.class);
 471
 472             assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId());
 473             assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion());
 474
 475             notifierActor.underlyingActor().clear();
 476
 477             MockRaftActor raftActor = raftActorRef.underlyingActor();
 478             final String newLeaderId = "new-leader";
 479             final short newLeaderVersion = 6;
 480             Follower follower = new Follower(raftActor.getRaftActorContext()) {
 481                 @Override
 482                 public RaftActorBehavior handleMessage(ActorRef sender, Object message) {
 483                     leaderId = newLeaderId;
 484                     setLeaderPayloadVersion(newLeaderVersion);
 485                     return this;
 486                 }
 487             };
 488
 489             raftActor.newBehavior(follower);
 490
 491             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 492             assertEquals(persistenceId, leaderStateChange.getMemberId());
 493             assertEquals(null, leaderStateChange.getLeaderId());
 494
 495             raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class);
 496             assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole());
 497             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 498
 499             notifierActor.underlyingActor().clear();
 500
 501             raftActor.handleCommand("any");
 502
 503             leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class);
 504             assertEquals(persistenceId, leaderStateChange.getMemberId());
 505             assertEquals(newLeaderId, leaderStateChange.getLeaderId());
 506             assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion());
 507
 508             notifierActor.underlyingActor().clear();
 509
 510             raftActor.handleCommand("any");
 511
 512             Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS);
 513             leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class);
 514             assertNull(leaderStateChange);
 515         }};
 516     }
 517
 518     @Test
 519     public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
 520         new JavaTestKit(getSystem()) {{
 521             ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
 522             MessageCollectorActor.waitUntilReady(notifierActor);
 523
 524             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 525             long heartBeatInterval = 100;
 526             config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
 527             config.setElectionTimeoutFactor(1);
 528
 529             String persistenceId = factory.generateActorId("notifier-");
 530
 531             factory.createActor(MockRaftActor.props(persistenceId,
 532                     ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
 533
 534             List<RoleChanged> matches =  null;
 535             for(int i = 0; i < 5000 / heartBeatInterval; i++) {
 536                 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
 537                 assertNotNull(matches);
 538                 if(matches.size() == 3) {
 539                     break;
 540                 }
 541                 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
 542             }
 543
 544             assertNotNull(matches);
 545             assertEquals(2, matches.size());
 546
 547             // check if the notifier got a role change from null to Follower
 548             RoleChanged raftRoleChanged = matches.get(0);
 549             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 550             assertNull(raftRoleChanged.getOldRole());
 551             assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
 552
 553             // check if the notifier got a role change from Follower to Candidate
 554             raftRoleChanged = matches.get(1);
 555             assertEquals(persistenceId, raftRoleChanged.getMemberId());
 556             assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
 557             assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
 558
 559         }};
 560     }
 561
 562     @Test
 563     public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
 564         new JavaTestKit(getSystem()) {
 565             {
 566                 String persistenceId = factory.generateActorId("leader-");
 567                 String follower1Id = factory.generateActorId("follower-");
 568
 569                 ActorRef followerActor1 =
 570                         factory.createActor(Props.create(MessageCollectorActor.class));
 571
 572                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 573                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 574                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 575
 576                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 577
 578                 Map<String, String> peerAddresses = new HashMap<>();
 579                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 580
 581                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 582                         MockRaftActor.props(persistenceId, peerAddresses,
 583                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 584
 585                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 586
 587                 leaderActor.getRaftActorContext().setCommitIndex(4);
 588                 leaderActor.getRaftActorContext().setLastApplied(4);
 589                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 590
 591                 leaderActor.waitForInitializeBehaviorComplete();
 592
 593                 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 594
 595                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 596                 leaderActor.setCurrentBehavior(leader);
 597                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 598
 599                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 600                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
 601
 602                 assertEquals(8, leaderActor.getReplicatedLog().size());
 603
 604                 leaderActor.getRaftActorContext().getSnapshotManager()
 605                         .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 606                                 new MockRaftActorContext.MockPayload("x")), 4);
 607
 608                 verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 609
 610                 assertEquals(8, leaderActor.getReplicatedLog().size());
 611
 612                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 613                 //fake snapshot on index 5
 614                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short)0));
 615
 616                 assertEquals(8, leaderActor.getReplicatedLog().size());
 617
 618                 //fake snapshot on index 6
 619                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 620                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short)0));
 621                 assertEquals(8, leaderActor.getReplicatedLog().size());
 622
 623                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 624
 625                 assertEquals(8, leaderActor.getReplicatedLog().size());
 626
 627                 ByteString snapshotBytes = fromObject(Arrays.asList(
 628                         new MockRaftActorContext.MockPayload("foo-0"),
 629                         new MockRaftActorContext.MockPayload("foo-1"),
 630                         new MockRaftActorContext.MockPayload("foo-2"),
 631                         new MockRaftActorContext.MockPayload("foo-3"),
 632                         new MockRaftActorContext.MockPayload("foo-4")));
 633
 634                 leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(),
 635                         leader, Runtime.getRuntime().totalMemory());
 636
 637                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 638
 639                 // The commit is needed to complete the snapshot creation process
 640                 leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, leader);
 641
 642                 // capture snapshot reply should remove the snapshotted entries only
 643                 assertEquals(3, leaderActor.getReplicatedLog().size());
 644                 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
 645
 646                 // add another non-replicated entry
 647                 leaderActor.getReplicatedLog().append(
 648                         new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
 649
 650                 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
 651                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short)0));
 652                 assertEquals(2, leaderActor.getReplicatedLog().size());
 653                 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
 654
 655             }
 656         };
 657     }
 658
 659     @Test
 660     public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
 661         new JavaTestKit(getSystem()) {
 662             {
 663                 String persistenceId = factory.generateActorId("follower-");
 664                 String leaderId = factory.generateActorId("leader-");
 665
 666
 667                 ActorRef leaderActor1 =
 668                         factory.createActor(Props.create(MessageCollectorActor.class));
 669
 670                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 671                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 672                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 673
 674                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 675
 676                 Map<String, String> peerAddresses = new HashMap<>();
 677                 peerAddresses.put(leaderId, leaderActor1.path().toString());
 678
 679                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 680                         MockRaftActor.props(persistenceId, peerAddresses,
 681                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 682
 683                 MockRaftActor followerActor = mockActorRef.underlyingActor();
 684                 followerActor.getRaftActorContext().setCommitIndex(4);
 685                 followerActor.getRaftActorContext().setLastApplied(4);
 686                 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 687
 688                 followerActor.waitForInitializeBehaviorComplete();
 689
 690
 691                 Follower follower = new Follower(followerActor.getRaftActorContext());
 692                 followerActor.setCurrentBehavior(follower);
 693                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 694
 695                 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
 696                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 697                 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
 698
 699                 // log has indices 0-5
 700                 assertEquals(6, followerActor.getReplicatedLog().size());
 701
 702                 //snapshot on 4
 703                 followerActor.getRaftActorContext().getSnapshotManager().capture(
 704                         new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
 705                                 new MockRaftActorContext.MockPayload("D")), 4);
 706
 707                 verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class));
 708
 709                 assertEquals(6, followerActor.getReplicatedLog().size());
 710
 711                 //fake snapshot on index 6
 712                 List<ReplicatedLogEntry> entries =
 713                         Arrays.asList(
 714                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
 715                                         new MockRaftActorContext.MockPayload("foo-6"))
 716                         );
 717                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short)0));
 718                 assertEquals(7, followerActor.getReplicatedLog().size());
 719
 720                 //fake snapshot on index 7
 721                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 722
 723                 entries =
 724                         Arrays.asList(
 725                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
 726                                         new MockRaftActorContext.MockPayload("foo-7"))
 727                         );
 728                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0));
 729                 assertEquals(8, followerActor.getReplicatedLog().size());
 730
 731                 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
 732
 733
 734                 ByteString snapshotBytes = fromObject(Arrays.asList(
 735                         new MockRaftActorContext.MockPayload("foo-0"),
 736                         new MockRaftActorContext.MockPayload("foo-1"),
 737                         new MockRaftActorContext.MockPayload("foo-2"),
 738                         new MockRaftActorContext.MockPayload("foo-3"),
 739                         new MockRaftActorContext.MockPayload("foo-4")));
 740                 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 741                 assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing());
 742
 743                 // The commit is needed to complete the snapshot creation process
 744                 followerActor.getRaftActorContext().getSnapshotManager().commit(-1, follower);
 745
 746                 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
 747                 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
 748                 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
 749
 750                 entries =
 751                         Arrays.asList(
 752                                 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
 753                                         new MockRaftActorContext.MockPayload("foo-7"))
 754                         );
 755                 // send an additional entry 8 with leaderCommit = 7
 756                 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0));
 757
 758                 // 7 and 8, as lastapplied is 7
 759                 assertEquals(2, followerActor.getReplicatedLog().size());
 760
 761             }
 762         };
 763     }
 764
 765     @Test
 766     public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
 767         new JavaTestKit(getSystem()) {
 768             {
 769                 String persistenceId = factory.generateActorId("leader-");
 770                 String follower1Id = factory.generateActorId("follower-");
 771                 String follower2Id = factory.generateActorId("follower-");
 772
 773                 ActorRef followerActor1 =
 774                         factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
 775                 ActorRef followerActor2 =
 776                         factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
 777
 778                 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 779                 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 780                 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 781
 782                 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
 783
 784                 Map<String, String> peerAddresses = new HashMap<>();
 785                 peerAddresses.put(follower1Id, followerActor1.path().toString());
 786                 peerAddresses.put(follower2Id, followerActor2.path().toString());
 787
 788                 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 789                         MockRaftActor.props(persistenceId, peerAddresses,
 790                                 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 791
 792                 MockRaftActor leaderActor = mockActorRef.underlyingActor();
 793                 leaderActor.getRaftActorContext().setCommitIndex(9);
 794                 leaderActor.getRaftActorContext().setLastApplied(9);
 795                 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 796
 797                 leaderActor.waitForInitializeBehaviorComplete();
 798
 799                 Leader leader = new Leader(leaderActor.getRaftActorContext());
 800                 leaderActor.setCurrentBehavior(leader);
 801                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 802
 803                 // create 5 entries in the log
 804                 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
 805                 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
 806
 807                 //set the snapshot index to 4 , 0 to 4 are snapshotted
 808                 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
 809                 //setting replicatedToAllIndex = 9, for the log to clear
 810                 leader.setReplicatedToAllIndex(9);
 811                 assertEquals(5, leaderActor.getReplicatedLog().size());
 812                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 813
 814                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0));
 815                 assertEquals(5, leaderActor.getReplicatedLog().size());
 816                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 817
 818                 // set the 2nd follower nextIndex to 1 which has been snapshotted
 819                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short)0));
 820                 assertEquals(5, leaderActor.getReplicatedLog().size());
 821                 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 822
 823                 // simulate a real snapshot
 824                 leaderActor.onReceiveCommand(new SendHeartBeat());
 825                 assertEquals(5, leaderActor.getReplicatedLog().size());
 826                 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
 827                         leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
 828                         , RaftState.Leader, leaderActor.getCurrentBehavior().state());
 829
 830
 831                 //reply from a slow follower does not initiate a fake snapshot
 832                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short)0));
 833                 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
 834
 835                 ByteString snapshotBytes = fromObject(Arrays.asList(
 836                         new MockRaftActorContext.MockPayload("foo-0"),
 837                         new MockRaftActorContext.MockPayload("foo-1"),
 838                         new MockRaftActorContext.MockPayload("foo-2"),
 839                         new MockRaftActorContext.MockPayload("foo-3"),
 840                         new MockRaftActorContext.MockPayload("foo-4")));
 841                 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
 842                 assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 843
 844                 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
 845
 846                 //reply from a slow follower after should not raise errors
 847                 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0));
 848                 assertEquals(0, leaderActor.getReplicatedLog().size());
 849             }
 850         };
 851     }
 852
 853     @Test
 854     public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception {
 855         new JavaTestKit(getSystem()) {{
 856             String persistenceId = factory.generateActorId("leader-");
 857             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 858             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 859             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 860             config.setSnapshotBatchCount(5);
 861
 862             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 863
 864             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 865
 866             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 867                     MockRaftActor.props(persistenceId, peerAddresses,
 868                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 869
 870             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 871             leaderActor.getRaftActorContext().setCommitIndex(3);
 872             leaderActor.getRaftActorContext().setLastApplied(3);
 873             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 874
 875             leaderActor.waitForInitializeBehaviorComplete();
 876             for(int i=0;i< 4;i++) {
 877                 leaderActor.getReplicatedLog()
 878                         .append(new MockRaftActorContext.MockReplicatedLogEntry(1, i,
 879                                 new MockRaftActorContext.MockPayload("A")));
 880             }
 881
 882             Leader leader = new Leader(leaderActor.getRaftActorContext());
 883             leaderActor.setCurrentBehavior(leader);
 884             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 885
 886             // Simulate an install snaphost to a follower.
 887             leaderActor.getRaftActorContext().getSnapshotManager().captureToInstall(
 888                     leaderActor.getReplicatedLog().last(), -1, "member1");
 889
 890             // Now send a CaptureSnapshotReply
 891             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 892
 893             // Trimming log in this scenario is a no-op
 894             assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex());
 895             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 896             assertEquals(-1, leader.getReplicatedToAllIndex());
 897
 898         }};
 899     }
 900
 901     @Test
 902     public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception {
 903         new JavaTestKit(getSystem()) {{
 904             String persistenceId = factory.generateActorId("leader-");
 905             DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 906             config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 907             config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 908             config.setSnapshotBatchCount(5);
 909
 910             DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 911
 912             Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address").build();
 913
 914             TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 915                     MockRaftActor.props(persistenceId, peerAddresses,
 916                             Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 917
 918             MockRaftActor leaderActor = mockActorRef.underlyingActor();
 919             leaderActor.getRaftActorContext().setCommitIndex(3);
 920             leaderActor.getRaftActorContext().setLastApplied(3);
 921             leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
 922             leaderActor.getReplicatedLog().setSnapshotIndex(3);
 923
 924             leaderActor.waitForInitializeBehaviorComplete();
 925             Leader leader = new Leader(leaderActor.getRaftActorContext());
 926             leaderActor.setCurrentBehavior(leader);
 927             leader.setReplicatedToAllIndex(3);
 928             assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 929
 930             // Persist another entry (this will cause a CaptureSnapshot to be triggered
 931             leaderActor.persistData(mockActorRef, "x", new MockRaftActorContext.MockPayload("duh"));
 932
 933             // Now send a CaptureSnapshotReply
 934             mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef);
 935
 936             // Trimming log in this scenario is a no-op
 937             assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex());
 938             assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing());
 939             assertEquals(3, leader.getReplicatedToAllIndex());
 940
 941         }};
 942     }
 943
 944     @Test
 945     public void testSwitchBehavior(){
 946         String persistenceId = factory.generateActorId("leader-");
 947         DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
 948         config.setCustomRaftPolicyImplementationClass("org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy");
 949         config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 950         config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
 951         config.setSnapshotBatchCount(5);
 952
 953         DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider();
 954
 955         Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build();
 956
 957         TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
 958                 MockRaftActor.props(persistenceId, peerAddresses,
 959                         Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
 960
 961         MockRaftActor leaderActor = mockActorRef.underlyingActor();
 962
 963         leaderActor.waitForRecoveryComplete();
 964
 965         leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100));
 966
 967         assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 968         assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state());
 969
 970         leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110));
 971
 972         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 973         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 974
 975         leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125));
 976
 977         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 978         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 979
 980         leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125));
 981
 982         assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm());
 983         assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
 984     }
 985
 986     public static ByteString fromObject(Object snapshot) throws Exception {
 987         ByteArrayOutputStream b = null;
 988         ObjectOutputStream o = null;
 989         try {
 990             b = new ByteArrayOutputStream();
 991             o = new ObjectOutputStream(b);
 992             o.writeObject(snapshot);
 993             byte[] snapshotBytes = b.toByteArray();
 994             return ByteString.copyFrom(snapshotBytes);
 995         } finally {
 996             if (o != null) {
 997                 o.flush();
 998                 o.close();
 999             }
1000             if (b != null) {
1001                 b.close();
1002             }
1003         }
1004     }
1005
1006 }