1 package org.opendaylight.controller.cluster.raft;
3 import static org.junit.Assert.assertEquals;
4 import static org.junit.Assert.assertFalse;
5 import static org.junit.Assert.assertNotEquals;
6 import static org.junit.Assert.assertNotNull;
7 import static org.junit.Assert.assertNull;
8 import static org.junit.Assert.assertTrue;
9 import static org.mockito.Matchers.any;
10 import static org.mockito.Matchers.anyObject;
11 import static org.mockito.Matchers.eq;
12 import static org.mockito.Mockito.doReturn;
13 import static org.mockito.Mockito.mock;
14 import static org.mockito.Mockito.times;
15 import static org.mockito.Mockito.verify;
16 import akka.actor.ActorRef;
17 import akka.actor.ActorSystem;
18 import akka.actor.PoisonPill;
19 import akka.actor.Props;
20 import akka.actor.Terminated;
21 import akka.japi.Creator;
22 import akka.japi.Procedure;
23 import akka.pattern.Patterns;
24 import akka.persistence.RecoveryCompleted;
25 import akka.persistence.SaveSnapshotFailure;
26 import akka.persistence.SaveSnapshotSuccess;
27 import akka.persistence.SnapshotMetadata;
28 import akka.persistence.SnapshotOffer;
29 import akka.persistence.SnapshotSelectionCriteria;
30 import akka.testkit.JavaTestKit;
31 import akka.testkit.TestActorRef;
32 import akka.util.Timeout;
33 import com.google.common.base.Optional;
34 import com.google.common.collect.Lists;
35 import com.google.common.util.concurrent.Uninterruptibles;
36 import com.google.protobuf.ByteString;
37 import java.io.ByteArrayInputStream;
38 import java.io.ByteArrayOutputStream;
39 import java.io.IOException;
40 import java.io.ObjectInputStream;
41 import java.io.ObjectOutputStream;
42 import java.util.ArrayList;
43 import java.util.Arrays;
44 import java.util.Collections;
45 import java.util.HashMap;
46 import java.util.List;
48 import java.util.concurrent.CountDownLatch;
49 import java.util.concurrent.TimeUnit;
50 import java.util.concurrent.TimeoutException;
51 import org.junit.After;
52 import org.junit.Assert;
53 import org.junit.Before;
54 import org.junit.Test;
55 import org.opendaylight.controller.cluster.DataPersistenceProvider;
56 import org.opendaylight.controller.cluster.datastore.DataPersistenceProviderMonitor;
57 import org.opendaylight.controller.cluster.notifications.RoleChanged;
58 import org.opendaylight.controller.cluster.raft.base.messages.ApplyLogEntries;
59 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
60 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
61 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
62 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
63 import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat;
64 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
65 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
66 import org.opendaylight.controller.cluster.raft.client.messages.FindLeader;
67 import org.opendaylight.controller.cluster.raft.client.messages.FindLeaderReply;
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.protobuff.client.messages.Payload;
71 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
72 import org.opendaylight.controller.cluster.raft.utils.MockAkkaJournal;
73 import org.opendaylight.controller.cluster.raft.utils.MockSnapshotStore;
74 import scala.concurrent.Await;
75 import scala.concurrent.Future;
76 import scala.concurrent.duration.Duration;
77 import scala.concurrent.duration.FiniteDuration;
79 public class RaftActorTest extends AbstractActorTest {
81 private TestActorFactory factory;
85 factory = new TestActorFactory(getSystem());
89 public void tearDown() throws Exception {
91 MockAkkaJournal.clearJournal();
92 MockSnapshotStore.setMockSnapshot(null);
95 public static class MockRaftActor extends RaftActor {
97 private final DataPersistenceProvider dataPersistenceProvider;
98 private final RaftActor delegate;
99 private final CountDownLatch recoveryComplete = new CountDownLatch(1);
100 private final List<Object> state;
101 private ActorRef roleChangeNotifier;
102 private final CountDownLatch initializeBehaviorComplete = new CountDownLatch(1);
104 public static final class MockRaftActorCreator implements Creator<MockRaftActor> {
105 private static final long serialVersionUID = 1L;
106 private final Map<String, String> peerAddresses;
107 private final String id;
108 private final Optional<ConfigParams> config;
109 private final DataPersistenceProvider dataPersistenceProvider;
110 private final ActorRef roleChangeNotifier;
112 private MockRaftActorCreator(Map<String, String> peerAddresses, String id,
113 Optional<ConfigParams> config, DataPersistenceProvider dataPersistenceProvider,
114 ActorRef roleChangeNotifier) {
115 this.peerAddresses = peerAddresses;
117 this.config = config;
118 this.dataPersistenceProvider = dataPersistenceProvider;
119 this.roleChangeNotifier = roleChangeNotifier;
123 public MockRaftActor create() throws Exception {
124 MockRaftActor mockRaftActor = new MockRaftActor(id, peerAddresses, config,
125 dataPersistenceProvider);
126 mockRaftActor.roleChangeNotifier = this.roleChangeNotifier;
127 return mockRaftActor;
131 public MockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
132 DataPersistenceProvider dataPersistenceProvider) {
133 super(id, peerAddresses, config);
134 state = new ArrayList<>();
135 this.delegate = mock(RaftActor.class);
136 if(dataPersistenceProvider == null){
137 this.dataPersistenceProvider = new PersistentDataProvider();
139 this.dataPersistenceProvider = dataPersistenceProvider;
143 public void waitForRecoveryComplete() {
145 assertEquals("Recovery complete", true, recoveryComplete.await(5, TimeUnit.SECONDS));
146 } catch (InterruptedException e) {
151 public void waitForInitializeBehaviorComplete() {
153 assertEquals("Behavior initialized", true, initializeBehaviorComplete.await(5, TimeUnit.SECONDS));
154 } catch (InterruptedException e) {
159 public List<Object> getState() {
163 public static Props props(final String id, final Map<String, String> peerAddresses,
164 Optional<ConfigParams> config){
165 return Props.create(new MockRaftActorCreator(peerAddresses, id, config, null, null));
168 public static Props props(final String id, final Map<String, String> peerAddresses,
169 Optional<ConfigParams> config, DataPersistenceProvider dataPersistenceProvider){
170 return Props.create(new MockRaftActorCreator(peerAddresses, id, config, dataPersistenceProvider, null));
173 public static Props props(final String id, final Map<String, String> peerAddresses,
174 Optional<ConfigParams> config, ActorRef roleChangeNotifier){
175 return Props.create(new MockRaftActorCreator(peerAddresses, id, config, null, roleChangeNotifier));
178 @Override protected void applyState(ActorRef clientActor, String identifier, Object data) {
179 delegate.applyState(clientActor, identifier, data);
180 LOG.info("applyState called");
184 protected void startLogRecoveryBatch(int maxBatchSize) {
188 protected void appendRecoveredLogEntry(Payload data) {
193 protected void applyCurrentLogRecoveryBatch() {
197 protected void onRecoveryComplete() {
198 delegate.onRecoveryComplete();
199 recoveryComplete.countDown();
203 protected void initializeBehavior() {
204 super.initializeBehavior();
205 initializeBehaviorComplete.countDown();
209 protected void applyRecoverySnapshot(byte[] bytes) {
210 delegate.applyRecoverySnapshot(bytes);
212 Object data = toObject(bytes);
213 if (data instanceof List) {
214 state.addAll((List<?>) data);
216 } catch (Exception e) {
221 @Override protected void createSnapshot() {
222 delegate.createSnapshot();
225 @Override protected void applySnapshot(byte [] snapshot) {
226 delegate.applySnapshot(snapshot);
229 @Override protected void onStateChanged() {
230 delegate.onStateChanged();
234 protected DataPersistenceProvider persistence() {
235 return this.dataPersistenceProvider;
239 protected Optional<ActorRef> getRoleChangeNotifier() {
240 return Optional.fromNullable(roleChangeNotifier);
243 @Override public String persistenceId() {
247 private Object toObject(byte[] bs) throws ClassNotFoundException, IOException {
249 ByteArrayInputStream bis = null;
250 ObjectInputStream ois = null;
252 bis = new ByteArrayInputStream(bs);
253 ois = new ObjectInputStream(bis);
254 obj = ois.readObject();
266 public ReplicatedLog getReplicatedLog(){
267 return this.getRaftActorContext().getReplicatedLog();
273 private static class RaftActorTestKit extends JavaTestKit {
274 private final ActorRef raftActor;
276 public RaftActorTestKit(ActorSystem actorSystem, String actorName) {
279 raftActor = this.getSystem().actorOf(MockRaftActor.props(actorName,
280 Collections.<String,String>emptyMap(), Optional.<ConfigParams>absent()), actorName);
285 public ActorRef getRaftActor() {
289 public boolean waitForLogMessage(final Class<?> logEventClass, String message){
290 // Wait for a specific log message to show up
292 new JavaTestKit.EventFilter<Boolean>(logEventClass
295 protected Boolean run() {
298 }.from(raftActor.path().toString())
300 .occurrences(1).exec();
305 protected void waitUntilLeader(){
306 waitUntilLeader(raftActor);
309 protected void waitUntilLeader(ActorRef actorRef) {
310 FiniteDuration duration = Duration.create(100, TimeUnit.MILLISECONDS);
311 for(int i = 0; i < 20 * 5; i++) {
312 Future<Object> future = Patterns.ask(actorRef, new FindLeader(), new Timeout(duration));
314 FindLeaderReply resp = (FindLeaderReply) Await.result(future, duration);
315 if(resp.getLeaderActor() != null) {
318 } catch(TimeoutException e) {
319 } catch(Exception e) {
320 System.err.println("FindLeader threw ex");
325 Uninterruptibles.sleepUninterruptibly(50, TimeUnit.MILLISECONDS);
328 Assert.fail("Leader not found for actorRef " + actorRef.path());
335 public void testConstruction() {
336 new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader();
340 public void testFindLeaderWhenLeaderIsSelf(){
341 RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader");
342 kit.waitUntilLeader();
346 public void testRaftActorRecovery() throws Exception {
347 new JavaTestKit(getSystem()) {{
348 String persistenceId = factory.generateActorId("follower-");
350 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
351 // Set the heartbeat interval high to essentially disable election otherwise the test
352 // may fail if the actor is switched to Leader and the commitIndex is set to the last
354 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
356 ActorRef followerActor = factory.createActor(MockRaftActor.props(persistenceId,
357 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
359 watch(followerActor);
361 List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>();
362 ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4,
363 new MockRaftActorContext.MockPayload("E"));
364 snapshotUnappliedEntries.add(entry1);
366 int lastAppliedDuringSnapshotCapture = 3;
367 int lastIndexDuringSnapshotCapture = 4;
369 // 4 messages as part of snapshot, which are applied to state
370 ByteString snapshotBytes = fromObject(Arrays.asList(
371 new MockRaftActorContext.MockPayload("A"),
372 new MockRaftActorContext.MockPayload("B"),
373 new MockRaftActorContext.MockPayload("C"),
374 new MockRaftActorContext.MockPayload("D")));
376 Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
377 snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1,
378 lastAppliedDuringSnapshotCapture, 1);
379 MockSnapshotStore.setMockSnapshot(snapshot);
380 MockSnapshotStore.setPersistenceId(persistenceId);
382 // add more entries after snapshot is taken
383 List<ReplicatedLogEntry> entries = new ArrayList<>();
384 ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
385 new MockRaftActorContext.MockPayload("F"));
386 ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
387 new MockRaftActorContext.MockPayload("G"));
388 ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
389 new MockRaftActorContext.MockPayload("H"));
394 int lastAppliedToState = 5;
397 MockAkkaJournal.addToJournal(5, entry2);
398 // 2 entries are applied to state besides the 4 entries in snapshot
399 MockAkkaJournal.addToJournal(6, new ApplyLogEntries(lastAppliedToState));
400 MockAkkaJournal.addToJournal(7, entry3);
401 MockAkkaJournal.addToJournal(8, entry4);
404 followerActor.tell(PoisonPill.getInstance(), null);
405 expectMsgClass(duration("5 seconds"), Terminated.class);
407 unwatch(followerActor);
409 //reinstate the actor
410 TestActorRef<MockRaftActor> ref = factory.createTestActor(
411 MockRaftActor.props(persistenceId, Collections.<String, String>emptyMap(),
412 Optional.<ConfigParams>of(config)));
414 ref.underlyingActor().waitForRecoveryComplete();
416 RaftActorContext context = ref.underlyingActor().getRaftActorContext();
417 assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(),
418 context.getReplicatedLog().size());
419 assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex());
420 assertEquals("Last applied", lastAppliedToState, context.getLastApplied());
421 assertEquals("Commit index", lastAppliedToState, context.getCommitIndex());
422 assertEquals("Recovered state size", 6, ref.underlyingActor().getState().size());
427 * This test verifies that when recovery is applicable (typically when persistence is true) the RaftActor does
428 * process recovery messages
434 public void testHandleRecoveryWhenDataPersistenceRecoveryApplicable() throws Exception {
435 new JavaTestKit(getSystem()) {
437 String persistenceId = factory.generateActorId("leader-");
439 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
441 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
443 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
444 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config)), persistenceId);
446 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
448 // Wait for akka's recovery to complete so it doesn't interfere.
449 mockRaftActor.waitForRecoveryComplete();
451 ByteString snapshotBytes = fromObject(Arrays.asList(
452 new MockRaftActorContext.MockPayload("A"),
453 new MockRaftActorContext.MockPayload("B"),
454 new MockRaftActorContext.MockPayload("C"),
455 new MockRaftActorContext.MockPayload("D")));
457 Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
458 Lists.<ReplicatedLogEntry>newArrayList(), 3, 1, 3, 1);
460 mockRaftActor.onReceiveRecover(new SnapshotOffer(new SnapshotMetadata(persistenceId, 100, 100), snapshot));
462 verify(mockRaftActor.delegate).applyRecoverySnapshot(eq(snapshotBytes.toByteArray()));
464 mockRaftActor.onReceiveRecover(new ReplicatedLogImplEntry(0, 1, new MockRaftActorContext.MockPayload("A")));
466 ReplicatedLog replicatedLog = mockRaftActor.getReplicatedLog();
468 assertEquals("add replicated log entry", 1, replicatedLog.size());
470 mockRaftActor.onReceiveRecover(new ReplicatedLogImplEntry(1, 1, new MockRaftActorContext.MockPayload("A")));
472 assertEquals("add replicated log entry", 2, replicatedLog.size());
474 mockRaftActor.onReceiveRecover(new ApplyLogEntries(1));
476 assertEquals("commit index 1", 1, mockRaftActor.getRaftActorContext().getCommitIndex());
478 // The snapshot had 4 items + we added 2 more items during the test
479 // We start removing from 5 and we should get 1 item in the replicated log
480 mockRaftActor.onReceiveRecover(new RaftActor.DeleteEntries(5));
482 assertEquals("remove log entries", 1, replicatedLog.size());
484 mockRaftActor.onReceiveRecover(new RaftActor.UpdateElectionTerm(10, "foobar"));
486 assertEquals("election term", 10, mockRaftActor.getRaftActorContext().getTermInformation().getCurrentTerm());
487 assertEquals("voted for", "foobar", mockRaftActor.getRaftActorContext().getTermInformation().getVotedFor());
489 mockRaftActor.onReceiveRecover(mock(RecoveryCompleted.class));
495 * This test verifies that when recovery is not applicable (typically when persistence is false) the RaftActor does
496 * not process recovery messages
501 public void testHandleRecoveryWhenDataPersistenceRecoveryNotApplicable() throws Exception {
502 new JavaTestKit(getSystem()) {
504 String persistenceId = factory.generateActorId("leader-");
506 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
508 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
510 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
511 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), new DataPersistenceProviderMonitor()), persistenceId);
513 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
515 // Wait for akka's recovery to complete so it doesn't interfere.
516 mockRaftActor.waitForRecoveryComplete();
518 ByteString snapshotBytes = fromObject(Arrays.asList(
519 new MockRaftActorContext.MockPayload("A"),
520 new MockRaftActorContext.MockPayload("B"),
521 new MockRaftActorContext.MockPayload("C"),
522 new MockRaftActorContext.MockPayload("D")));
524 Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(),
525 Lists.<ReplicatedLogEntry>newArrayList(), 3, 1, 3, 1);
527 mockRaftActor.onReceiveRecover(new SnapshotOffer(new SnapshotMetadata(persistenceId, 100, 100), snapshot));
529 verify(mockRaftActor.delegate, times(0)).applyRecoverySnapshot(any(byte[].class));
531 mockRaftActor.onReceiveRecover(new ReplicatedLogImplEntry(0, 1, new MockRaftActorContext.MockPayload("A")));
533 ReplicatedLog replicatedLog = mockRaftActor.getReplicatedLog();
535 assertEquals("add replicated log entry", 0, replicatedLog.size());
537 mockRaftActor.onReceiveRecover(new ReplicatedLogImplEntry(1, 1, new MockRaftActorContext.MockPayload("A")));
539 assertEquals("add replicated log entry", 0, replicatedLog.size());
541 mockRaftActor.onReceiveRecover(new ApplyLogEntries(1));
543 assertEquals("commit index -1", -1, mockRaftActor.getRaftActorContext().getCommitIndex());
545 mockRaftActor.onReceiveRecover(new RaftActor.DeleteEntries(2));
547 assertEquals("remove log entries", 0, replicatedLog.size());
549 mockRaftActor.onReceiveRecover(new RaftActor.UpdateElectionTerm(10, "foobar"));
551 assertNotEquals("election term", 10, mockRaftActor.getRaftActorContext().getTermInformation().getCurrentTerm());
552 assertNotEquals("voted for", "foobar", mockRaftActor.getRaftActorContext().getTermInformation().getVotedFor());
554 mockRaftActor.onReceiveRecover(mock(RecoveryCompleted.class));
561 public void testUpdatingElectionTermCallsDataPersistence() throws Exception {
562 new JavaTestKit(getSystem()) {
564 String persistenceId = factory.generateActorId("leader-");
566 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
568 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
570 CountDownLatch persistLatch = new CountDownLatch(1);
571 DataPersistenceProviderMonitor dataPersistenceProviderMonitor = new DataPersistenceProviderMonitor();
572 dataPersistenceProviderMonitor.setPersistLatch(persistLatch);
574 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
575 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProviderMonitor), persistenceId);
577 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
579 mockRaftActor.getRaftActorContext().getTermInformation().updateAndPersist(10, "foobar");
581 assertEquals("Persist called", true, persistLatch.await(5, TimeUnit.SECONDS));
589 public void testAddingReplicatedLogEntryCallsDataPersistence() throws Exception {
590 new JavaTestKit(getSystem()) {
592 String persistenceId = factory.generateActorId("leader-");
594 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
596 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
598 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
600 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
601 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
603 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
605 MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(10, 10, mock(Payload.class));
607 mockRaftActor.getRaftActorContext().getReplicatedLog().appendAndPersist(logEntry);
609 verify(dataPersistenceProvider).persist(eq(logEntry), any(Procedure.class));
617 public void testRemovingReplicatedLogEntryCallsDataPersistence() throws Exception {
618 new JavaTestKit(getSystem()) {
620 String persistenceId = factory.generateActorId("leader-");
622 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
624 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
626 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
628 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
629 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
631 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
633 mockRaftActor.getReplicatedLog().appendAndPersist(new MockRaftActorContext.MockReplicatedLogEntry(1, 0, mock(Payload.class)));
635 mockRaftActor.getRaftActorContext().getReplicatedLog().removeFromAndPersist(0);
637 verify(dataPersistenceProvider, times(2)).persist(anyObject(), any(Procedure.class));
645 public void testApplyLogEntriesCallsDataPersistence() throws Exception {
646 new JavaTestKit(getSystem()) {
648 String persistenceId = factory.generateActorId("leader-");
650 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
652 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
654 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
656 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
657 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
659 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
661 mockRaftActor.onReceiveCommand(new ApplyLogEntries(10));
663 verify(dataPersistenceProvider, times(1)).persist(anyObject(), any(Procedure.class));
671 public void testCaptureSnapshotReplyCallsDataPersistence() throws Exception {
672 new JavaTestKit(getSystem()) {
674 String persistenceId = factory.generateActorId("leader-");
676 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
678 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
680 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
682 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
683 MockRaftActor.props(persistenceId, Collections.<String, String>emptyMap(),
684 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
686 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
688 ByteString snapshotBytes = fromObject(Arrays.asList(
689 new MockRaftActorContext.MockPayload("A"),
690 new MockRaftActorContext.MockPayload("B"),
691 new MockRaftActorContext.MockPayload("C"),
692 new MockRaftActorContext.MockPayload("D")));
694 mockRaftActor.onReceiveCommand(new CaptureSnapshot(-1, 1,-1, 1, -1, 1));
696 RaftActorContext raftActorContext = mockRaftActor.getRaftActorContext();
698 mockRaftActor.setCurrentBehavior(new Leader(raftActorContext));
700 mockRaftActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
702 verify(dataPersistenceProvider).saveSnapshot(anyObject());
709 public void testSaveSnapshotSuccessCallsDataPersistence() throws Exception {
710 new JavaTestKit(getSystem()) {
712 String persistenceId = factory.generateActorId("leader-");
714 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
716 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
718 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
720 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
721 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
723 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
725 mockRaftActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, 0, mock(Payload.class)));
726 mockRaftActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, 1, mock(Payload.class)));
727 mockRaftActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, 2, mock(Payload.class)));
728 mockRaftActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, 3, mock(Payload.class)));
729 mockRaftActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, 4, mock(Payload.class)));
731 ByteString snapshotBytes = fromObject(Arrays.asList(
732 new MockRaftActorContext.MockPayload("A"),
733 new MockRaftActorContext.MockPayload("B"),
734 new MockRaftActorContext.MockPayload("C"),
735 new MockRaftActorContext.MockPayload("D")));
737 RaftActorContext raftActorContext = mockRaftActor.getRaftActorContext();
738 mockRaftActor.setCurrentBehavior(new Follower(raftActorContext));
740 long replicatedToAllIndex = 1;
741 mockRaftActor.onReceiveCommand(new CaptureSnapshot(-1, 1, 2, 1, replicatedToAllIndex, 1));
743 verify(mockRaftActor.delegate).createSnapshot();
745 mockRaftActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
747 mockRaftActor.onReceiveCommand(new SaveSnapshotSuccess(new SnapshotMetadata("foo", 100, 100)));
749 verify(dataPersistenceProvider).deleteSnapshots(any(SnapshotSelectionCriteria.class));
751 verify(dataPersistenceProvider).deleteMessages(100);
753 assertEquals(3, mockRaftActor.getReplicatedLog().size());
754 assertEquals(1, mockRaftActor.getCurrentBehavior().getReplicatedToAllIndex());
756 assertNotNull(mockRaftActor.getReplicatedLog().get(2));
757 assertNotNull(mockRaftActor.getReplicatedLog().get(3));
758 assertNotNull(mockRaftActor.getReplicatedLog().get(4));
760 // Index 2 will not be in the log because it was removed due to snapshotting
761 assertNull(mockRaftActor.getReplicatedLog().get(1));
762 assertNull(mockRaftActor.getReplicatedLog().get(0));
769 public void testApplyState() throws Exception {
771 new JavaTestKit(getSystem()) {
773 String persistenceId = factory.generateActorId("leader-");
775 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
777 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
779 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
781 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
782 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
784 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
786 ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5,
787 new MockRaftActorContext.MockPayload("F"));
789 mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, "apply-state", entry));
791 verify(mockRaftActor.delegate).applyState(eq(mockActorRef), eq("apply-state"), anyObject());
798 public void testApplySnapshot() throws Exception {
799 new JavaTestKit(getSystem()) {
801 String persistenceId = factory.generateActorId("leader-");
803 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
805 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
807 DataPersistenceProviderMonitor dataPersistenceProviderMonitor = new DataPersistenceProviderMonitor();
809 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
810 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProviderMonitor), persistenceId);
812 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
814 ReplicatedLog oldReplicatedLog = mockRaftActor.getReplicatedLog();
816 oldReplicatedLog.append(new MockRaftActorContext.MockReplicatedLogEntry(1, 0, mock(Payload.class)));
817 oldReplicatedLog.append(new MockRaftActorContext.MockReplicatedLogEntry(1, 1, mock(Payload.class)));
818 oldReplicatedLog.append(
819 new MockRaftActorContext.MockReplicatedLogEntry(1, 2,
820 mock(Payload.class)));
822 ByteString snapshotBytes = fromObject(Arrays.asList(
823 new MockRaftActorContext.MockPayload("A"),
824 new MockRaftActorContext.MockPayload("B"),
825 new MockRaftActorContext.MockPayload("C"),
826 new MockRaftActorContext.MockPayload("D")));
828 Snapshot snapshot = mock(Snapshot.class);
830 doReturn(snapshotBytes.toByteArray()).when(snapshot).getState();
832 doReturn(3L).when(snapshot).getLastAppliedIndex();
834 mockRaftActor.onReceiveCommand(new ApplySnapshot(snapshot));
836 verify(mockRaftActor.delegate).applySnapshot(eq(snapshot.getState()));
838 assertTrue("The replicatedLog should have changed",
839 oldReplicatedLog != mockRaftActor.getReplicatedLog());
841 assertEquals("lastApplied should be same as in the snapshot",
842 (Long) 3L, mockRaftActor.getLastApplied());
844 assertEquals(0, mockRaftActor.getReplicatedLog().size());
851 public void testSaveSnapshotFailure() throws Exception {
852 new JavaTestKit(getSystem()) {
854 String persistenceId = factory.generateActorId("leader-");
856 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
858 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
860 DataPersistenceProviderMonitor dataPersistenceProviderMonitor = new DataPersistenceProviderMonitor();
862 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.props(persistenceId,
863 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), dataPersistenceProviderMonitor), persistenceId);
865 MockRaftActor mockRaftActor = mockActorRef.underlyingActor();
867 ByteString snapshotBytes = fromObject(Arrays.asList(
868 new MockRaftActorContext.MockPayload("A"),
869 new MockRaftActorContext.MockPayload("B"),
870 new MockRaftActorContext.MockPayload("C"),
871 new MockRaftActorContext.MockPayload("D")));
873 RaftActorContext raftActorContext = mockRaftActor.getRaftActorContext();
875 mockRaftActor.setCurrentBehavior(new Leader(raftActorContext));
877 mockRaftActor.onReceiveCommand(new CaptureSnapshot(-1, 1, -1, 1, -1, 1));
879 mockRaftActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
881 mockRaftActor.onReceiveCommand(new SaveSnapshotFailure(new SnapshotMetadata("foobar", 10L, 1234L),
884 assertEquals("Snapshot index should not have advanced because save snapshot failed", -1,
885 mockRaftActor.getReplicatedLog().getSnapshotIndex());
892 public void testRaftRoleChangeNotifier() throws Exception {
893 new JavaTestKit(getSystem()) {{
894 ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
895 MessageCollectorActor.waitUntilReady(notifierActor);
897 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
898 long heartBeatInterval = 100;
899 config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
900 config.setElectionTimeoutFactor(1);
902 String persistenceId = factory.generateActorId("notifier-");
904 factory.createTestActor(MockRaftActor.props(persistenceId,
905 Collections.<String, String>emptyMap(), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
907 List<RoleChanged> matches = null;
908 for(int i = 0; i < 5000 / heartBeatInterval; i++) {
909 matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
910 assertNotNull(matches);
911 if(matches.size() == 3) {
914 Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
917 assertEquals(3, matches.size());
919 // check if the notifier got a role change from null to Follower
920 RoleChanged raftRoleChanged = matches.get(0);
921 assertEquals(persistenceId, raftRoleChanged.getMemberId());
922 assertNull(raftRoleChanged.getOldRole());
923 assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
925 // check if the notifier got a role change from Follower to Candidate
926 raftRoleChanged = matches.get(1);
927 assertEquals(persistenceId, raftRoleChanged.getMemberId());
928 assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
929 assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
931 // check if the notifier got a role change from Candidate to Leader
932 raftRoleChanged = matches.get(2);
933 assertEquals(persistenceId, raftRoleChanged.getMemberId());
934 assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole());
935 assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole());
940 public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception {
941 new JavaTestKit(getSystem()) {
943 String persistenceId = factory.generateActorId("leader-");
944 String follower1Id = factory.generateActorId("follower-");
946 ActorRef followerActor1 =
947 factory.createActor(Props.create(MessageCollectorActor.class));
949 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
950 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
951 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
953 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
955 Map<String, String> peerAddresses = new HashMap<>();
956 peerAddresses.put(follower1Id, followerActor1.path().toString());
958 TestActorRef<MockRaftActor> mockActorRef = TestActorRef.create(getSystem(),
959 MockRaftActor.props(persistenceId, peerAddresses,
960 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
962 MockRaftActor leaderActor = mockActorRef.underlyingActor();
963 leaderActor.getRaftActorContext().setCommitIndex(4);
964 leaderActor.getRaftActorContext().setLastApplied(4);
965 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
967 leaderActor.waitForInitializeBehaviorComplete();
969 // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
971 Leader leader = new Leader(leaderActor.getRaftActorContext());
972 leaderActor.setCurrentBehavior(leader);
973 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
975 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
976 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build());
978 assertEquals(8, leaderActor.getReplicatedLog().size());
980 leaderActor.onReceiveCommand(new CaptureSnapshot(6, 1, 4, 1, 4, 1));
982 leaderActor.getRaftActorContext().setSnapshotCaptureInitiated(true);
983 verify(leaderActor.delegate).createSnapshot();
985 assertEquals(8, leaderActor.getReplicatedLog().size());
987 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
988 //fake snapshot on index 5
989 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1));
991 assertEquals(8, leaderActor.getReplicatedLog().size());
993 //fake snapshot on index 6
994 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
995 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1));
996 assertEquals(8, leaderActor.getReplicatedLog().size());
998 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
1000 assertEquals(8, leaderActor.getReplicatedLog().size());
1002 ByteString snapshotBytes = fromObject(Arrays.asList(
1003 new MockRaftActorContext.MockPayload("foo-0"),
1004 new MockRaftActorContext.MockPayload("foo-1"),
1005 new MockRaftActorContext.MockPayload("foo-2"),
1006 new MockRaftActorContext.MockPayload("foo-3"),
1007 new MockRaftActorContext.MockPayload("foo-4")));
1008 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
1009 assertFalse(leaderActor.getRaftActorContext().isSnapshotCaptureInitiated());
1011 // capture snapshot reply should remove the snapshotted entries only
1012 assertEquals(3, leaderActor.getReplicatedLog().size());
1013 assertEquals(7, leaderActor.getReplicatedLog().lastIndex());
1015 // add another non-replicated entry
1016 leaderActor.getReplicatedLog().append(
1017 new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8")));
1019 //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied
1020 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1));
1021 assertEquals(2, leaderActor.getReplicatedLog().size());
1022 assertEquals(8, leaderActor.getReplicatedLog().lastIndex());
1029 public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception {
1030 new JavaTestKit(getSystem()) {
1032 String persistenceId = factory.generateActorId("follower-");
1033 String leaderId = factory.generateActorId("leader-");
1036 ActorRef leaderActor1 =
1037 factory.createActor(Props.create(MessageCollectorActor.class));
1039 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1040 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
1041 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
1043 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
1045 Map<String, String> peerAddresses = new HashMap<>();
1046 peerAddresses.put(leaderId, leaderActor1.path().toString());
1048 TestActorRef<MockRaftActor> mockActorRef = TestActorRef.create(getSystem(),
1049 MockRaftActor.props(persistenceId, peerAddresses,
1050 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
1052 MockRaftActor followerActor = mockActorRef.underlyingActor();
1053 followerActor.getRaftActorContext().setCommitIndex(4);
1054 followerActor.getRaftActorContext().setLastApplied(4);
1055 followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
1057 followerActor.waitForInitializeBehaviorComplete();
1060 Follower follower = new Follower(followerActor.getRaftActorContext());
1061 followerActor.setCurrentBehavior(follower);
1062 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
1064 // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot
1065 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
1066 followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build());
1068 // log has indices 0-5
1069 assertEquals(6, followerActor.getReplicatedLog().size());
1072 followerActor.onReceiveCommand(new CaptureSnapshot(5, 1, 4, 1, 4, 1));
1074 followerActor.getRaftActorContext().setSnapshotCaptureInitiated(true);
1075 verify(followerActor.delegate).createSnapshot();
1077 assertEquals(6, followerActor.getReplicatedLog().size());
1079 //fake snapshot on index 6
1080 List<ReplicatedLogEntry> entries =
1082 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6,
1083 new MockRaftActorContext.MockPayload("foo-6"))
1085 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5));
1086 assertEquals(7, followerActor.getReplicatedLog().size());
1088 //fake snapshot on index 7
1089 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
1093 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7,
1094 new MockRaftActorContext.MockPayload("foo-7"))
1096 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6));
1097 assertEquals(8, followerActor.getReplicatedLog().size());
1099 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state());
1102 ByteString snapshotBytes = fromObject(Arrays.asList(
1103 new MockRaftActorContext.MockPayload("foo-0"),
1104 new MockRaftActorContext.MockPayload("foo-1"),
1105 new MockRaftActorContext.MockPayload("foo-2"),
1106 new MockRaftActorContext.MockPayload("foo-3"),
1107 new MockRaftActorContext.MockPayload("foo-4")));
1108 followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
1109 assertFalse(followerActor.getRaftActorContext().isSnapshotCaptureInitiated());
1111 // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex
1112 assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log
1113 assertEquals(7, followerActor.getReplicatedLog().lastIndex());
1117 (ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8,
1118 new MockRaftActorContext.MockPayload("foo-7"))
1120 // send an additional entry 8 with leaderCommit = 7
1121 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7));
1123 // 7 and 8, as lastapplied is 7
1124 assertEquals(2, followerActor.getReplicatedLog().size());
1131 public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception {
1132 new JavaTestKit(getSystem()) {
1134 String persistenceId = factory.generateActorId("leader-");
1135 String follower1Id = factory.generateActorId("follower-");
1136 String follower2Id = factory.generateActorId("follower-");
1138 ActorRef followerActor1 =
1139 factory.createActor(Props.create(MessageCollectorActor.class), follower1Id);
1140 ActorRef followerActor2 =
1141 factory.createActor(Props.create(MessageCollectorActor.class), follower2Id);
1143 DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
1144 config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
1145 config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS));
1147 DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class);
1149 Map<String, String> peerAddresses = new HashMap<>();
1150 peerAddresses.put(follower1Id, followerActor1.path().toString());
1151 peerAddresses.put(follower2Id, followerActor2.path().toString());
1153 TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(
1154 MockRaftActor.props(persistenceId, peerAddresses,
1155 Optional.<ConfigParams>of(config), dataPersistenceProvider), persistenceId);
1157 MockRaftActor leaderActor = mockActorRef.underlyingActor();
1158 leaderActor.getRaftActorContext().setCommitIndex(9);
1159 leaderActor.getRaftActorContext().setLastApplied(9);
1160 leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId);
1162 leaderActor.waitForInitializeBehaviorComplete();
1164 Leader leader = new Leader(leaderActor.getRaftActorContext());
1165 leaderActor.setCurrentBehavior(leader);
1166 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
1168 // create 5 entries in the log
1169 MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder();
1170 leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build());
1172 //set the snapshot index to 4 , 0 to 4 are snapshotted
1173 leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4);
1174 //setting replicatedToAllIndex = 9, for the log to clear
1175 leader.setReplicatedToAllIndex(9);
1176 assertEquals(5, leaderActor.getReplicatedLog().size());
1177 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
1179 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1));
1180 assertEquals(5, leaderActor.getReplicatedLog().size());
1181 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
1183 // set the 2nd follower nextIndex to 1 which has been snapshotted
1184 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1));
1185 assertEquals(5, leaderActor.getReplicatedLog().size());
1186 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state());
1188 // simulate a real snapshot
1189 leaderActor.onReceiveCommand(new SendHeartBeat());
1190 assertEquals(5, leaderActor.getReplicatedLog().size());
1191 assertEquals(String.format("expected to be Leader but was %s. Current Leader = %s ",
1192 leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId())
1193 , RaftState.Leader, leaderActor.getCurrentBehavior().state());
1196 //reply from a slow follower does not initiate a fake snapshot
1197 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1));
1198 assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size());
1200 ByteString snapshotBytes = fromObject(Arrays.asList(
1201 new MockRaftActorContext.MockPayload("foo-0"),
1202 new MockRaftActorContext.MockPayload("foo-1"),
1203 new MockRaftActorContext.MockPayload("foo-2"),
1204 new MockRaftActorContext.MockPayload("foo-3"),
1205 new MockRaftActorContext.MockPayload("foo-4")));
1206 leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray()));
1207 assertFalse(leaderActor.getRaftActorContext().isSnapshotCaptureInitiated());
1209 assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size());
1211 //reply from a slow follower after should not raise errors
1212 leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1));
1213 assertEquals(0, leaderActor.getReplicatedLog().size());
1218 private ByteString fromObject(Object snapshot) throws Exception {
1219 ByteArrayOutputStream b = null;
1220 ObjectOutputStream o = null;
1222 b = new ByteArrayOutputStream();
1223 o = new ObjectOutputStream(b);
1224 o.writeObject(snapshot);
1225 byte[] snapshotBytes = b.toByteArray();
1226 return ByteString.copyFrom(snapshotBytes);