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

   1 /*
   2  * Copyright (c) 2015 Brocade Communications 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 package org.opendaylight.controller.cluster.raft;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertTrue;
  12 import static org.junit.Assert.fail;
  13 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.assertNoneMatching;
  14 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.clearMessages;
  15 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectFirstMatching;
  16 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectMatching;
  17 import akka.actor.ActorRef;
  18 import akka.actor.Props;
  19 import akka.actor.UntypedActor;
  20 import akka.dispatch.Dispatchers;
  21 import akka.testkit.JavaTestKit;
  22 import akka.testkit.TestActorRef;
  23 import com.google.common.base.Optional;
  24 import com.google.common.base.Stopwatch;
  25 import com.google.common.collect.ImmutableMap;
  26 import com.google.common.collect.Maps;
  27 import com.google.common.collect.Sets;
  28 import java.util.Arrays;
  29 import java.util.Collections;
  30 import java.util.List;
  31 import java.util.Map;
  32 import java.util.concurrent.TimeUnit;
  33 import org.junit.After;
  34 import org.junit.Before;
  35 import org.junit.Test;
  36 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  37 import org.opendaylight.controller.cluster.raft.base.messages.ApplyJournalEntries;
  38 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  39 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  40 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  41 import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout;
  42 import org.opendaylight.controller.cluster.raft.base.messages.InitiateCaptureSnapshot;
  43 import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow;
  44 import org.opendaylight.controller.cluster.raft.base.messages.UpdateElectionTerm;
  45 import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
  46 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  47 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  48 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  49 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  50 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  51 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  52 import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus;
  53 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  54 import org.opendaylight.controller.cluster.raft.messages.RemoveServer;
  55 import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply;
  56 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
  57 import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply;
  58 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  59 import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
  60 import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply;
  61 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  62 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  63 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  64 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  65 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  66 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  67 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  68 import org.slf4j.Logger;
  69 import org.slf4j.LoggerFactory;
  70 import scala.concurrent.duration.FiniteDuration;
  71
  72 /**
  73  * Unit tests for RaftActorServerConfigurationSupport.
  74  *
  75  * @author Thomas Pantelis
  76  */
  77 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  78     static final String LEADER_ID = "leader";
  79     static final String FOLLOWER_ID = "follower";
  80     static final String FOLLOWER_ID2 = "follower2";
  81     static final String NEW_SERVER_ID = "new-server";
  82     static final String NEW_SERVER_ID2 = "new-server2";
  83     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  84     private static final Class<?> COMMIT_MESSAGE_CLASS = RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT.getClass();
  85     private static final boolean NO_PERSISTENCE = false;
  86     private static final boolean PERSISTENT = true;
  87
  88     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  89
  90     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
  91             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
  92             actorFactory.generateActorId(FOLLOWER_ID));
  93
  94     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
  95     private TestActorRef<MessageCollectorActor> newFollowerCollectorActor;
  96     private RaftActorContext newFollowerActorContext;
  97
  98     private final JavaTestKit testKit = new JavaTestKit(getSystem());
  99
 100     @Before
 101     public void setup() {
 102         InMemoryJournal.clear();
 103         InMemorySnapshotStore.clear();
 104     }
 105
 106     private void setupNewFollower() {
 107         DefaultConfigParamsImpl configParams = newFollowerConfigParams();
 108
 109         newFollowerCollectorActor = actorFactory.createTestActor(
 110                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 111                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
 112         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
 113                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
 114                 actorFactory.generateActorId(NEW_SERVER_ID));
 115
 116         try {
 117             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 118         } catch (Exception e) {
 119             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 120         }
 121     }
 122
 123     private static DefaultConfigParamsImpl newFollowerConfigParams() {
 124         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 125         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 126         configParams.setElectionTimeoutFactor(100000);
 127         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 128         return configParams;
 129     }
 130
 131     @After
 132     public void tearDown() throws Exception {
 133         actorFactory.close();
 134     }
 135
 136     @Test
 137     public void testAddServerWithExistingFollower() throws Exception {
 138         LOG.info("testAddServerWithExistingFollower starting");
 139         setupNewFollower();
 140         RaftActorContextImpl followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 141         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 142                 0, 3, 1).build());
 143         followerActorContext.setCommitIndex(2);
 144         followerActorContext.setLastApplied(2);
 145
 146         Follower follower = new Follower(followerActorContext);
 147         followerActor.underlyingActor().setBehavior(follower);
 148         followerActorContext.setCurrentBehavior(follower);
 149
 150         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 151                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 152                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 153                 actorFactory.generateActorId(LEADER_ID));
 154
 155         // Expect initial heartbeat from the leader.
 156         expectFirstMatching(followerActor, AppendEntries.class);
 157         clearMessages(followerActor);
 158
 159         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 160         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 161
 162         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 163
 164         // Leader should install snapshot - capture and verify ApplySnapshot contents
 165
 166         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 167         @SuppressWarnings("unchecked")
 168         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 169         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 170
 171         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 172         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 173         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 174
 175         // Verify ServerConfigurationPayload entry in leader's log
 176
 177         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 178         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 179         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 180         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 181         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 182         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 183                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 184
 185         // Verify ServerConfigurationPayload entry in both followers
 186
 187         expectFirstMatching(followerActor, ApplyState.class);
 188         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 189         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 190                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 191
 192         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 193         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 194         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 195                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 196
 197         // Verify new server config was applied in both followers
 198
 199         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 200
 201         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID), newFollowerActorContext.getPeerIds());
 202
 203         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 204         expectFirstMatching(followerActor, ApplyState.class);
 205
 206         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 207         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 208         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 209         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 210
 211         List<ReplicatedLogImplEntry> persistedLogEntries = InMemoryJournal.get(LEADER_ID, ReplicatedLogImplEntry.class);
 212         assertEquals("Leader ReplicatedLogImplEntry entries", 1, persistedLogEntries.size());
 213         ReplicatedLogImplEntry logEntry = persistedLogEntries.get(0);
 214         assertEquals("Leader ReplicatedLogImplEntry getTerm", 1, logEntry.getTerm());
 215         assertEquals("Leader ReplicatedLogImplEntry getIndex", 3, logEntry.getIndex());
 216         assertEquals("Leader ReplicatedLogImplEntry getData", ServerConfigurationPayload.class, logEntry.getData().getClass());
 217
 218         persistedLogEntries = InMemoryJournal.get(NEW_SERVER_ID, ReplicatedLogImplEntry.class);
 219         assertEquals("New follower ReplicatedLogImplEntry entries", 1, persistedLogEntries.size());
 220         logEntry = persistedLogEntries.get(0);
 221         assertEquals("New follower ReplicatedLogImplEntry getTerm", 1, logEntry.getTerm());
 222         assertEquals("New follower ReplicatedLogImplEntry getIndex", 3, logEntry.getIndex());
 223         assertEquals("New follower ReplicatedLogImplEntry getData", ServerConfigurationPayload.class,
 224                 logEntry.getData().getClass());
 225
 226         LOG.info("testAddServerWithExistingFollower ending");
 227     }
 228
 229     @Test
 230     public void testAddServerWithNoExistingFollower() throws Exception {
 231         LOG.info("testAddServerWithNoExistingFollower starting");
 232
 233         setupNewFollower();
 234         RaftActorContext initialActorContext = new MockRaftActorContext();
 235         initialActorContext.setCommitIndex(1);
 236         initialActorContext.setLastApplied(1);
 237         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 238                 0, 2, 1).build());
 239
 240         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 241                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 242                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 243                 actorFactory.generateActorId(LEADER_ID));
 244
 245         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 246         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 247
 248         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 249
 250         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 251
 252         // Leader should install snapshot - capture and verify ApplySnapshot contents
 253
 254         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 255         @SuppressWarnings("unchecked")
 256         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 257         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 258
 259         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 260         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 261         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 262
 263         // Verify ServerConfigurationPayload entry in leader's log
 264
 265         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 266         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 267         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 268         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 269         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 270                 votingServer(NEW_SERVER_ID));
 271
 272         // Verify ServerConfigurationPayload entry in the new follower
 273
 274         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 275         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 276         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 277                 votingServer(NEW_SERVER_ID));
 278
 279         // Verify new server config was applied in the new follower
 280
 281         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 282
 283         LOG.info("testAddServerWithNoExistingFollower ending");
 284     }
 285
 286     @Test
 287     public void testAddServersAsNonVoting() throws Exception {
 288         LOG.info("testAddServersAsNonVoting starting");
 289
 290         setupNewFollower();
 291         RaftActorContext initialActorContext = new MockRaftActorContext();
 292
 293         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 294                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 295                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 296                 actorFactory.generateActorId(LEADER_ID));
 297
 298         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 299         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 300
 301         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 302
 303         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 304
 305         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 306         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 307         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 308
 309         // Verify ServerConfigurationPayload entry in leader's log
 310
 311         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 312
 313         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 314         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 315         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 316         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 317                 nonVotingServer(NEW_SERVER_ID));
 318
 319         // Verify ServerConfigurationPayload entry in the new follower
 320
 321         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 322         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 323         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 324                 nonVotingServer(NEW_SERVER_ID));
 325
 326         // Verify new server config was applied in the new follower
 327
 328         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 329
 330         assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 331
 332         // Add another non-voting server.
 333
 334         clearMessages(leaderCollectorActor);
 335
 336         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 337         Follower newFollower2 = new Follower(follower2ActorContext);
 338         followerActor.underlyingActor().setBehavior(newFollower2);
 339
 340         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 341
 342         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 343         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 344         assertEquals("getLeaderHint", java.util.Optional.of(LEADER_ID), addServerReply.getLeaderHint());
 345
 346         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 347         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 348         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 349         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 350         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 351                 votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 352
 353         LOG.info("testAddServersAsNonVoting ending");
 354     }
 355
 356     @Test
 357     public void testAddServerWithOperationInProgress() throws Exception {
 358         LOG.info("testAddServerWithOperationInProgress starting");
 359
 360         setupNewFollower();
 361         RaftActorContext initialActorContext = new MockRaftActorContext();
 362
 363         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 364                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 365                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 366                 actorFactory.generateActorId(LEADER_ID));
 367
 368         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 369         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 370
 371         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 372
 373         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 374         Follower newFollower2 = new Follower(follower2ActorContext);
 375         followerActor.underlyingActor().setBehavior(newFollower2);
 376
 377         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 378         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.class);
 379
 380         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 381
 382         // Wait for leader's install snapshot and capture it
 383
 384         InstallSnapshot installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 385
 386         // Send a second AddServer - should get queued
 387         JavaTestKit testKit2 = new JavaTestKit(getSystem());
 388         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 389
 390         // Continue the first AddServer
 391         newFollowerRaftActorInstance.setDropMessageOfType(null);
 392         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 393
 394         // Verify both complete successfully
 395         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 396         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 397
 398         addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 399         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 400
 401         // Verify ServerConfigurationPayload entries in leader's log
 402
 403         expectMatching(leaderCollectorActor, ApplyState.class, 2);
 404         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 405         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 406         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 407         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 408                 votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 409
 410         // Verify ServerConfigurationPayload entry in the new follower
 411
 412         expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 413         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2),
 414                newFollowerActorContext.getPeerIds());
 415
 416         LOG.info("testAddServerWithOperationInProgress ending");
 417     }
 418
 419     @Test
 420     public void testAddServerWithPriorSnapshotInProgress() throws Exception {
 421         LOG.info("testAddServerWithPriorSnapshotInProgress starting");
 422
 423         setupNewFollower();
 424         RaftActorContext initialActorContext = new MockRaftActorContext();
 425
 426         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 427                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 428                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 429                 actorFactory.generateActorId(LEADER_ID));
 430
 431         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 432         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 433
 434         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 435
 436         // Drop commit message for now to delay snapshot completion
 437         leaderRaftActor.setDropMessageOfType(String.class);
 438
 439         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 440
 441         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 442
 443         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 444
 445         leaderRaftActor.setDropMessageOfType(null);
 446         leaderActor.tell(commitMsg, leaderActor);
 447
 448         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 449         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 450         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 451
 452         expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 453
 454         // Verify ServerConfigurationPayload entry in leader's log
 455
 456         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 457         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 458         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 459         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 460         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 461                 votingServer(NEW_SERVER_ID));
 462
 463         LOG.info("testAddServerWithPriorSnapshotInProgress ending");
 464     }
 465
 466     @Test
 467     public void testAddServerWithPriorSnapshotCompleteTimeout() throws Exception {
 468         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout starting");
 469
 470         setupNewFollower();
 471         RaftActorContext initialActorContext = new MockRaftActorContext();
 472
 473         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 474                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 475                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 476                 actorFactory.generateActorId(LEADER_ID));
 477
 478         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 479         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 480
 481         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 482
 483         // Drop commit message so the snapshot doesn't complete.
 484         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 485
 486         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 487
 488         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 489
 490         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 491         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 492
 493         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 494
 495         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout ending");
 496     }
 497
 498     @Test
 499     public void testAddServerWithLeaderChangeBeforePriorSnapshotComplete() throws Exception {
 500         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete starting");
 501
 502         setupNewFollower();
 503         RaftActorContext initialActorContext = new MockRaftActorContext();
 504
 505         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 506                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 507                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 508                 actorFactory.generateActorId(LEADER_ID));
 509
 510         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 511         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 512         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 513
 514         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 515
 516         // Drop the commit message so the snapshot doesn't complete yet.
 517         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 518
 519         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 520
 521         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 522
 523         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 524
 525         // Change the leader behavior to follower
 526         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 527
 528         // Drop CaptureSnapshotReply in case install snapshot is incorrectly initiated after the prior
 529         // snapshot completes. This will prevent the invalid snapshot from completing and fail the
 530         // isCapturing assertion below.
 531         leaderRaftActor.setDropMessageOfType(CaptureSnapshotReply.class);
 532
 533         // Complete the prior snapshot - this should be a no-op b/c it's no longer the leader
 534         leaderActor.tell(commitMsg, leaderActor);
 535
 536         leaderActor.tell(new RaftActorServerConfigurationSupport.ServerOperationTimeout(NEW_SERVER_ID), leaderActor);
 537
 538         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 539         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 540
 541         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 542         assertEquals("isCapturing", false, leaderActorContext.getSnapshotManager().isCapturing());
 543
 544         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete ending");
 545     }
 546
 547     @Test
 548     public void testAddServerWithLeaderChangeDuringInstallSnapshot() throws Exception {
 549         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot starting");
 550
 551         setupNewFollower();
 552         RaftActorContext initialActorContext = new MockRaftActorContext();
 553
 554         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 555                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 556                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 557                 actorFactory.generateActorId(LEADER_ID));
 558
 559         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 560         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 561
 562         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(8);
 563
 564         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 565
 566         // Drop the UnInitializedFollowerSnapshotReply to delay it.
 567         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 568
 569         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 570
 571         UnInitializedFollowerSnapshotReply snapshotReply = expectFirstMatching(leaderCollectorActor,
 572                 UnInitializedFollowerSnapshotReply.class);
 573
 574         // Prevent election timeout when the leader switches to follower
 575         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 576
 577         // Change the leader behavior to follower
 578         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 579
 580         // Send the captured UnInitializedFollowerSnapshotReply - should be a no-op
 581         leaderRaftActor.setDropMessageOfType(null);
 582         leaderActor.tell(snapshotReply, leaderActor);
 583
 584         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 585         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 586
 587         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 588
 589         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot ending");
 590     }
 591
 592     @Test
 593     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 594         LOG.info("testAddServerWithInstallSnapshotTimeout starting");
 595
 596         setupNewFollower();
 597         RaftActorContext initialActorContext = new MockRaftActorContext();
 598
 599         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 600                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 601                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 602                 actorFactory.generateActorId(LEADER_ID));
 603
 604         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 605         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 606         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 607
 608         // Drop the InstallSnapshot message so it times out
 609         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.class);
 610
 611         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 612
 613         leaderActor.tell(new UnInitializedFollowerSnapshotReply("bogus"), leaderActor);
 614
 615         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 616         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 617
 618         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 619         assertEquals("Leader followers size", 0,
 620                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 621
 622         LOG.info("testAddServerWithInstallSnapshotTimeout ending");
 623     }
 624
 625     @Test
 626     public void testAddServerWithNoLeader() {
 627         LOG.info("testAddServerWithNoLeader starting");
 628
 629         setupNewFollower();
 630         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 631         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 632
 633         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 634                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 635                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false)).
 636                         props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 637                 actorFactory.generateActorId(LEADER_ID));
 638         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 639
 640         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 641         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 642         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 643
 644         LOG.info("testAddServerWithNoLeader ending");
 645     }
 646
 647     @Test
 648     public void testAddServerWithNoConsensusReached() {
 649         LOG.info("testAddServerWithNoConsensusReached starting");
 650
 651         setupNewFollower();
 652         RaftActorContext initialActorContext = new MockRaftActorContext();
 653
 654         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 655                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 656                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 657                 actorFactory.generateActorId(LEADER_ID));
 658
 659         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 660         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 661
 662         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 663
 664         // Drop UnInitializedFollowerSnapshotReply initially
 665         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 666
 667         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 668         TestActorRef<MessageCollectorActor> newFollowerCollectorActor =
 669                 newCollectorActor(newFollowerRaftActorInstance, NEW_SERVER_ID);
 670
 671         // Drop AppendEntries to the new follower so consensus isn't reached
 672         newFollowerRaftActorInstance.setDropMessageOfType(AppendEntries.class);
 673
 674         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 675
 676         // Capture the UnInitializedFollowerSnapshotReply
 677         Object snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class);
 678
 679         // Send the UnInitializedFollowerSnapshotReply to resume the first request
 680         leaderRaftActor.setDropMessageOfType(null);
 681         leaderActor.tell(snapshotReply, leaderActor);
 682
 683         expectFirstMatching(newFollowerCollectorActor, AppendEntries.class);
 684
 685         // Send a second AddServer
 686         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 687
 688         // The first AddServer should succeed with OK even though consensus wasn't reached
 689         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 690         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 691         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 692
 693         // Verify ServerConfigurationPayload entry in leader's log
 694         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 695                 votingServer(NEW_SERVER_ID));
 696
 697         // The second AddServer should fail since consensus wasn't reached for the first
 698         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 699         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 700
 701         // Re-send the second AddServer - should also fail
 702         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 703         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 704         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 705
 706         LOG.info("testAddServerWithNoConsensusReached ending");
 707     }
 708
 709     @Test
 710     public void testAddServerWithExistingServer() {
 711         LOG.info("testAddServerWithExistingServer starting");
 712
 713         RaftActorContext initialActorContext = new MockRaftActorContext();
 714
 715         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 716                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 717                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 718                 actorFactory.generateActorId(LEADER_ID));
 719
 720         leaderActor.tell(new AddServer(FOLLOWER_ID, followerActor.path().toString(), true), testKit.getRef());
 721
 722         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 723         assertEquals("getStatus", ServerChangeStatus.ALREADY_EXISTS, addServerReply.getStatus());
 724
 725         LOG.info("testAddServerWithExistingServer ending");
 726     }
 727
 728     @Test
 729     public void testAddServerForwardedToLeader() {
 730         LOG.info("testAddServerForwardedToLeader starting");
 731
 732         setupNewFollower();
 733         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 734         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 735
 736         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 737                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 738                 actorFactory.generateActorId(LEADER_ID));
 739
 740         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 741                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 742                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false)).
 743                         props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 744                 actorFactory.generateActorId(FOLLOWER_ID));
 745         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 746
 747         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 748                 -1, -1, (short)0), leaderActor);
 749
 750         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 751         expectFirstMatching(leaderActor, AddServer.class);
 752
 753         LOG.info("testAddServerForwardedToLeader ending");
 754     }
 755
 756     @Test
 757     public void testOnApplyState() {
 758         LOG.info("testOnApplyState starting");
 759
 760         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 761         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 762         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 763                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 764                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false)).
 765                         props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 766                 actorFactory.generateActorId(LEADER_ID));
 767
 768         RaftActorServerConfigurationSupport support = new RaftActorServerConfigurationSupport(noLeaderActor.underlyingActor());
 769
 770         ReplicatedLogEntry serverConfigEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1,
 771                 new ServerConfigurationPayload(Collections.<ServerInfo>emptyList()));
 772         boolean handled = support.handleMessage(new ApplyState(null, null, serverConfigEntry), ActorRef.noSender());
 773         assertEquals("Message handled", true, handled);
 774
 775         ReplicatedLogEntry nonServerConfigEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1,
 776                 new MockRaftActorContext.MockPayload("1"));
 777         handled = support.handleMessage(new ApplyState(null, null, nonServerConfigEntry), ActorRef.noSender());
 778         assertEquals("Message handled", false, handled);
 779
 780         LOG.info("testOnApplyState ending");
 781     }
 782
 783     @Test
 784     public void testRemoveServerWithNoLeader() {
 785         LOG.info("testRemoveServerWithNoLeader starting");
 786
 787         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 788         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 789
 790         TestActorRef<MockRaftActor> leaderActor = actorFactory.createTestActor(
 791                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 792                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false)).
 793                         props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 794                 actorFactory.generateActorId(LEADER_ID));
 795         leaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 796
 797         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 798         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class);
 799         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, removeServerReply.getStatus());
 800
 801         LOG.info("testRemoveServerWithNoLeader ending");
 802     }
 803
 804     @Test
 805     public void testRemoveServerNonExistentServer() {
 806         LOG.info("testRemoveServerNonExistentServer starting");
 807
 808         RaftActorContext initialActorContext = new MockRaftActorContext();
 809
 810         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 811                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 812                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 813                 actorFactory.generateActorId(LEADER_ID));
 814
 815         leaderActor.tell(new RemoveServer(NEW_SERVER_ID), testKit.getRef());
 816         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class);
 817         assertEquals("getStatus", ServerChangeStatus.DOES_NOT_EXIST, removeServerReply.getStatus());
 818
 819         LOG.info("testRemoveServerNonExistentServer ending");
 820     }
 821
 822     @Test
 823     public void testRemoveServerForwardToLeader() {
 824         LOG.info("testRemoveServerForwardToLeader starting");
 825
 826         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 827         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 828
 829         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 830                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 831                 actorFactory.generateActorId(LEADER_ID));
 832
 833         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 834                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 835                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false)).
 836                         props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 837                 actorFactory.generateActorId(FOLLOWER_ID));
 838         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 839
 840         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 841                 -1, -1, (short)0), leaderActor);
 842
 843         followerRaftActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 844         expectFirstMatching(leaderActor, RemoveServer.class);
 845
 846         LOG.info("testRemoveServerForwardToLeader ending");
 847     }
 848
 849     @Test
 850     public void testRemoveServer() {
 851         LOG.info("testRemoveServer starting");
 852
 853         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 854         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 855         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 856
 857         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 858         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 859         RaftActorContext initialActorContext = new MockRaftActorContext();
 860
 861         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 862                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 863                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 864                 actorFactory.generateActorId(LEADER_ID));
 865
 866         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 867
 868         TestActorRef<MessageCollectorActor> collector =
 869                 actorFactory.createTestActor(MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 870                         actorFactory.generateActorId("collector"));
 871         TestActorRef<CollectingMockRaftActor> followerRaftActor = actorFactory.createTestActor(
 872                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 873                         configParams, NO_PERSISTENCE, collector).withDispatcher(Dispatchers.DefaultDispatcherId()),
 874                 followerActorId);
 875
 876         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 877         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class);
 878         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 879
 880         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
 881         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 882         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(), votingServer(LEADER_ID));
 883
 884         RaftActorBehavior currentBehavior = leaderActor.underlyingActor().getCurrentBehavior();
 885         assertTrue("Expected Leader", currentBehavior instanceof Leader);
 886         assertEquals("Follower ids size", 0, ((Leader)currentBehavior).getFollowerIds().size());
 887
 888         MessageCollectorActor.expectFirstMatching(collector, ServerRemoved.class);
 889
 890         LOG.info("testRemoveServer ending");
 891     }
 892
 893     @Test
 894     public void testRemoveServerLeader() {
 895         LOG.info("testRemoveServerLeader starting");
 896
 897         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 898         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 899         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 900
 901         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 902         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 903         RaftActorContext initialActorContext = new MockRaftActorContext();
 904
 905         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 906                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 907                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 908                 actorFactory.generateActorId(LEADER_ID));
 909
 910         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 911
 912         TestActorRef<MessageCollectorActor> followerCollector = actorFactory.createTestActor(MessageCollectorActor.props().
 913                 withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector"));
 914         actorFactory.createTestActor(
 915                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 916                         configParams, NO_PERSISTENCE, followerCollector).withDispatcher(Dispatchers.DefaultDispatcherId()),
 917                 followerActorId);
 918
 919         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 920         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class);
 921         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 922
 923         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(followerCollector, ApplyState.class);
 924         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 925         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 926                 votingServer(FOLLOWER_ID));
 927
 928         MessageCollectorActor.expectFirstMatching(leaderCollector, ServerRemoved.class);
 929
 930         LOG.info("testRemoveServerLeader ending");
 931     }
 932
 933     @Test
 934     public void testRemoveServerLeaderWithNoFollowers() {
 935         LOG.info("testRemoveServerLeaderWithNoFollowers starting");
 936
 937         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 938                 MockLeaderRaftActor.props(Collections.<String, String>emptyMap(),
 939                         new MockRaftActorContext()).withDispatcher(Dispatchers.DefaultDispatcherId()),
 940                 actorFactory.generateActorId(LEADER_ID));
 941
 942         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 943         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), RemoveServerReply.class);
 944         assertEquals("getStatus", ServerChangeStatus.NOT_SUPPORTED, removeServerReply.getStatus());
 945
 946         LOG.info("testRemoveServerLeaderWithNoFollowers ending");
 947     }
 948
 949     @Test
 950     public void testChangeServersVotingStatus() {
 951         LOG.info("testChangeServersVotingStatus starting");
 952
 953         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 954         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 955         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 956
 957         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
 958         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
 959         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
 960         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
 961
 962         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 963                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
 964                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext()).
 965                         withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
 966         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 967
 968         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
 969                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 970                 actorFactory.generateActorId("collector"));
 971         TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
 972                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 973                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector).
 974                         withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
 975
 976         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
 977                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 978                 actorFactory.generateActorId("collector"));
 979         TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
 980                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 981                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector).
 982                         withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
 983
 984         // Send first ChangeServersVotingStatus message
 985
 986         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, false, FOLLOWER_ID2, false)),
 987                 testKit.getRef());
 988         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
 989         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
 990
 991         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
 992         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 993         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 994                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
 995
 996         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
 997         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 998                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
 999
1000         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1001         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1002                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1003
1004         MessageCollectorActor.clearMessages(leaderCollector);
1005         MessageCollectorActor.clearMessages(follower1Collector);
1006         MessageCollectorActor.clearMessages(follower2Collector);
1007
1008         // Send second ChangeServersVotingStatus message
1009
1010         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, true)), testKit.getRef());
1011         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1012         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1013
1014         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1015         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1016                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1017
1018         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1019         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1020                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1021
1022         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1023         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1024                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1025
1026         LOG.info("testChangeServersVotingStatus ending");
1027     }
1028
1029     @Test
1030     public void testChangeLeaderToNonVoting() {
1031         LOG.info("testChangeLeaderToNonVoting starting");
1032
1033         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1034         configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS));
1035
1036         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
1037         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
1038         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
1039         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
1040
1041         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1042                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
1043                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext()).
1044                         withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1045         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
1046
1047         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
1048                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1049                 actorFactory.generateActorId("collector"));
1050         TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
1051                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1052                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector).
1053                         withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
1054
1055         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
1056                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1057                 actorFactory.generateActorId("collector"));
1058         TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
1059                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1060                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector).
1061                         withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
1062
1063         // Send ChangeServersVotingStatus message
1064
1065         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1066         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1067         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1068
1069         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1070         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1071                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1072
1073         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1074         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1075                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1076
1077         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1078         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1079                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1080
1081         verifyRaftState(RaftState.Leader, follower1RaftActor.underlyingActor(), follower2RaftActor.underlyingActor());
1082         verifyRaftState(RaftState.Follower, leaderActor.underlyingActor());
1083
1084         MessageCollectorActor.expectMatching(leaderCollector, AppendEntries.class, 2);
1085
1086         LOG.info("testChangeLeaderToNonVoting ending");
1087     }
1088
1089     @Test
1090     public void testChangeLeaderToNonVotingInSingleNode() {
1091         LOG.info("testChangeLeaderToNonVotingInSingleNode starting");
1092
1093         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1094                 MockLeaderRaftActor.props(ImmutableMap.of(), new MockRaftActorContext()).
1095                         withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1096
1097         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1098         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1099         assertEquals("getStatus", ServerChangeStatus.INVALID_REQUEST, reply.getStatus());
1100
1101         LOG.info("testChangeLeaderToNonVotingInSingleNode ending");
1102     }
1103
1104     @Test
1105     public void testChangeToVotingWithNoLeader() {
1106         LOG.info("testChangeToVotingWithNoLeader starting");
1107
1108         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1109         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1110         configParams.setElectionTimeoutFactor(5);
1111
1112         final String node1ID = "node1";
1113         final String node2ID = "node2";
1114
1115         // Set up a persisted ServerConfigurationPayload. Initially node1 and node2 will come up as non-voting.
1116         // via the server config. The server config will also contain 2 voting peers that are down (ie no
1117         // actors created).
1118
1119         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1120                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false),
1121                 new ServerInfo("downNode1", true), new ServerInfo("downNode2", true)));
1122         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1123
1124         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "downNode1"));
1125         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1126         InMemoryJournal.addEntry(node1ID, 3, new ApplyJournalEntries(0));
1127         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "downNode2"));
1128         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1129         InMemoryJournal.addEntry(node2ID, 3, new ApplyJournalEntries(0));
1130
1131         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1132                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1133                 actorFactory.generateActorId("collector"));
1134         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1135                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1136                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1137         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1138
1139         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1140                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1141                 actorFactory.generateActorId("collector"));
1142         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1143                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1144                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1145         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1146
1147         node1RaftActor.waitForInitializeBehaviorComplete();
1148         node2RaftActor.waitForInitializeBehaviorComplete();
1149
1150         // Verify the intended server config was loaded and applied.
1151         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1152                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1153                 votingServer("downNode2"));
1154         assertEquals("isVotingMember", false, node1RaftActor.getRaftActorContext().isVotingMember());
1155         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1156         assertEquals("getLeaderId", null, node1RaftActor.getLeaderId());
1157
1158         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1159                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1160                 votingServer("downNode2"));
1161         assertEquals("isVotingMember", false, node2RaftActor.getRaftActorContext().isVotingMember());
1162
1163         // For the test, we send a ChangeServersVotingStatus message to node1 to flip the voting states for
1164         // each server, ie node1 and node2 to voting and the 2 down nodes to non-voting. This should cause
1165         // node1 to try to elect itself as leader in order to apply the new server config. Since the 2
1166         // down nodes are switched to non-voting, node1 should only need a vote from node2.
1167
1168         // First send the message such that node1 has no peer address for node2 - should fail.
1169
1170         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1171                 node2ID, true, "downNode1", false, "downNode2", false));
1172         node1RaftActorRef.tell(changeServers, testKit.getRef());
1173         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1174         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1175
1176         // Send an AppendEntries so node1 has a leaderId
1177
1178         MessageCollectorActor.clearMessages(node1Collector);
1179
1180         long term = node1RaftActor.getRaftActorContext().getTermInformation().getCurrentTerm();
1181         node1RaftActorRef.tell(new AppendEntries(term, "downNode1", -1L, -1L,
1182                 Collections.<ReplicatedLogEntry>emptyList(), 0, -1, (short)1), ActorRef.noSender());
1183
1184         // Wait for the ElectionTimeout to clear the leaderId. he leaderId must be null so on the
1185         // ChangeServersVotingStatus message, it will try to elect a leader.
1186
1187         MessageCollectorActor.expectFirstMatching(node1Collector, ElectionTimeout.class);
1188
1189         // Update node2's peer address and send the message again
1190
1191         node1RaftActor.setPeerAddress(node2ID, node2RaftActorRef.path().toString());
1192
1193         node1RaftActorRef.tell(changeServers, testKit.getRef());
1194         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1195         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1196
1197         ApplyJournalEntries apply = MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1198         assertEquals("getToIndex", 1, apply.getToIndex());
1199         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1200                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1201                 nonVotingServer("downNode2"));
1202         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1203         assertEquals("getRaftState", RaftState.Leader, node1RaftActor.getRaftState());
1204
1205         apply = MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1206         assertEquals("getToIndex", 1, apply.getToIndex());
1207         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1208                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1209                 nonVotingServer("downNode2"));
1210         assertEquals("isVotingMember", true, node2RaftActor.getRaftActorContext().isVotingMember());
1211         assertEquals("getRaftState", RaftState.Follower, node2RaftActor.getRaftState());
1212
1213         LOG.info("testChangeToVotingWithNoLeader ending");
1214     }
1215
1216     @Test
1217     public void testChangeToVotingWithNoLeaderAndElectionTimeout() {
1218         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout starting");
1219
1220         final String node1ID = "node1";
1221         final String node2ID = "node2";
1222
1223         PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID) ? actorFactory.createTestActorPath(node1ID) :
1224             peerId.equals(node2ID) ? actorFactory.createTestActorPath(node2ID) : null;
1225
1226         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1227                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1228         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1229
1230         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1231         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1232         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1233         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1234
1235         DefaultConfigParamsImpl configParams1 = new DefaultConfigParamsImpl();
1236         configParams1.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1237         configParams1.setElectionTimeoutFactor(1);
1238         configParams1.setPeerAddressResolver(peerAddressResolver);
1239         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1240                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1241                 actorFactory.generateActorId("collector"));
1242         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1243                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams1,
1244                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1245         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1246
1247         DefaultConfigParamsImpl configParams2 = new DefaultConfigParamsImpl();
1248         configParams2.setElectionTimeoutFactor(1000000);
1249         configParams2.setPeerAddressResolver(peerAddressResolver);
1250         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1251                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1252                 actorFactory.generateActorId("collector"));
1253         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1254                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams2,
1255                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1256         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1257
1258         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1259         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1260         // RequestVote messages in node2 which should cause node1 to time out and revert back to the previous
1261         // server config and fail with NO_LEADER. Note that node1 shouldn't forward the request to node2 b/c
1262         // node2 was previously voting.
1263
1264         node2RaftActor.setDropMessageOfType(RequestVote.class);
1265
1266         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true));
1267         node1RaftActorRef.tell(changeServers, testKit.getRef());
1268         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1269         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1270
1271         assertEquals("Server config", Sets.newHashSet(nonVotingServer(node1ID), votingServer(node2ID)),
1272                 Sets.newHashSet(node1RaftActor.getRaftActorContext().getPeerServerInfo(true).getServerConfig()));
1273         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1274
1275         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout ending");
1276     }
1277
1278     @Test
1279     public void testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout() {
1280         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout starting");
1281
1282         final String node1ID = "node1";
1283         final String node2ID = "node2";
1284
1285         PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID) ? actorFactory.createTestActorPath(node1ID) :
1286             peerId.equals(node2ID) ? actorFactory.createTestActorPath(node2ID) : null;
1287
1288         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1289         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1290         configParams.setElectionTimeoutFactor(3);
1291         configParams.setPeerAddressResolver(peerAddressResolver);
1292
1293         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1294                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false)));
1295         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1296
1297         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1298         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1299         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1300         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1301         InMemoryJournal.addEntry(node2ID, 3, new ReplicatedLogImplEntry(1, 1,
1302                 new MockRaftActorContext.MockPayload("2")));
1303         InMemoryJournal.addEntry(node2ID, 4, new ApplyJournalEntries(1));
1304
1305         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1306                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1307                 actorFactory.generateActorId("collector"));
1308         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1309                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1310                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1311         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1312
1313         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1314                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1315                 actorFactory.generateActorId("collector"));
1316         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1317                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1318                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1319         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1320
1321         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1322         // node1 to try to elect itself as leader in order to apply the new server config. However node1's log
1323         // is behind node2's so node2 should not grant node1's vote. This should cause node1 to time out and
1324         // forward the request to node2.
1325
1326         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(
1327                 ImmutableMap.of(node1ID, true, node2ID, true));
1328         node1RaftActorRef.tell(changeServers, testKit.getRef());
1329         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1330         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1331
1332         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1333         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1334                 votingServer(node1ID), votingServer(node2ID));
1335         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1336
1337         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1338         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1339                 votingServer(node1ID), votingServer(node2ID));
1340         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1341         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1342
1343         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout ending");
1344     }
1345
1346     @Test
1347     public void testChangeToVotingWithNoLeaderAndOtherLeaderElected() {
1348         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected starting");
1349
1350         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1351         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1352         configParams.setElectionTimeoutFactor(100000);
1353
1354         final String node1ID = "node1";
1355         final String node2ID = "node2";
1356
1357         configParams.setPeerAddressResolver(peerId -> peerId.equals(node1ID) ? actorFactory.createTestActorPath(node1ID) :
1358             peerId.equals(node2ID) ? actorFactory.createTestActorPath(node2ID) : null);
1359
1360         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1361                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1362         ReplicatedLogImplEntry persistedServerConfigEntry = new ReplicatedLogImplEntry(0, 1, persistedServerConfig);
1363
1364         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1365         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1366         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1367         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1368
1369         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1370                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1371                 actorFactory.generateActorId("collector"));
1372         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1373                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1374                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1375         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1376
1377         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1378                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1379                 actorFactory.generateActorId("collector"));
1380         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1381                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1382                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1383         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1384
1385         // Send a ChangeServersVotingStatus message to node1 to change node1 to voting. This should cause
1386         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1387         // RequestVote messages in node2 and make it the leader so node1 should forward the server change
1388         // request to node2 when node2 is elected.
1389
1390         node2RaftActor.setDropMessageOfType(RequestVote.class);
1391
1392         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1393                 node2ID, true));
1394         node1RaftActorRef.tell(changeServers, testKit.getRef());
1395
1396         MessageCollectorActor.expectFirstMatching(node2Collector, RequestVote.class);
1397
1398         node2RaftActorRef.tell(TimeoutNow.INSTANCE, ActorRef.noSender());
1399
1400         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1401         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1402
1403         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1404         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1405                 votingServer(node1ID), votingServer(node2ID));
1406         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1407         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1408
1409         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1410         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1411                 votingServer(node1ID), votingServer(node2ID));
1412         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1413
1414         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected ending");
1415     }
1416
1417     private static void verifyRaftState(RaftState expState, RaftActor... raftActors) {
1418         Stopwatch sw = Stopwatch.createStarted();
1419         while(sw.elapsed(TimeUnit.SECONDS) <= 5) {
1420             for(RaftActor raftActor: raftActors) {
1421                 if(raftActor.getRaftState() == expState) {
1422                     return;
1423                 }
1424             }
1425         }
1426
1427         fail("None of the RaftActors have state " + expState);
1428     }
1429
1430     private static ServerInfo votingServer(String id) {
1431         return new ServerInfo(id, true);
1432     }
1433
1434     private static ServerInfo nonVotingServer(String id) {
1435         return new ServerInfo(id, false);
1436     }
1437
1438     private TestActorRef<MessageCollectorActor> newLeaderCollectorActor(MockLeaderRaftActor leaderRaftActor) {
1439         return newCollectorActor(leaderRaftActor, LEADER_ID);
1440     }
1441
1442     private TestActorRef<MessageCollectorActor> newCollectorActor(AbstractMockRaftActor raftActor, String id) {
1443         TestActorRef<MessageCollectorActor> collectorActor = actorFactory.createTestActor(
1444                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1445                 actorFactory.generateActorId(id + "Collector"));
1446         raftActor.setCollectorActor(collectorActor);
1447         return collectorActor;
1448     }
1449
1450     private static void verifyServerConfigurationPayloadEntry(ReplicatedLog log, ServerInfo... expected) {
1451         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
1452         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
1453         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
1454         assertEquals("Server config", Sets.newHashSet(expected), Sets.newHashSet(payload.getServerConfig()));
1455     }
1456
1457     private static RaftActorContextImpl newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
1458         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1459         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1460         configParams.setElectionTimeoutFactor(100000);
1461         NonPersistentDataProvider noPersistence = new NonPersistentDataProvider();
1462         ElectionTermImpl termInfo = new ElectionTermImpl(noPersistence, id, LOG);
1463         termInfo.update(1, LEADER_ID);
1464         return new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
1465                 id, termInfo, -1, -1, ImmutableMap.of(LEADER_ID, ""), configParams, noPersistence, LOG);
1466     }
1467
1468     static abstract class AbstractMockRaftActor extends MockRaftActor {
1469         private volatile TestActorRef<MessageCollectorActor> collectorActor;
1470         private volatile Class<?> dropMessageOfType;
1471
1472         AbstractMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1473                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1474             super(builder().id(id).peerAddresses(peerAddresses).config(config.get()).
1475                     persistent(Optional.of(persistent)));
1476             this.collectorActor = collectorActor;
1477         }
1478
1479         void setDropMessageOfType(Class<?> dropMessageOfType) {
1480             this.dropMessageOfType = dropMessageOfType;
1481         }
1482
1483         void setCollectorActor(TestActorRef<MessageCollectorActor> collectorActor) {
1484             this.collectorActor = collectorActor;
1485         }
1486
1487         @Override
1488         public void handleCommand(Object message) {
1489             if(dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
1490                 super.handleCommand(message);
1491             }
1492
1493             if(collectorActor != null) {
1494                 collectorActor.tell(message, getSender());
1495             }
1496         }
1497     }
1498
1499     public static class CollectingMockRaftActor extends AbstractMockRaftActor {
1500
1501         CollectingMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1502                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1503             super(id, peerAddresses, config, persistent, collectorActor);
1504             snapshotCohortDelegate = new RaftActorSnapshotCohort() {
1505                 @Override
1506                 public void createSnapshot(ActorRef actorRef) {
1507                     actorRef.tell(new CaptureSnapshotReply(new byte[0]), actorRef);
1508                 }
1509
1510                 @Override
1511                 public void applySnapshot(byte[] snapshotBytes) {
1512                 }
1513             };
1514         }
1515
1516         public static Props props(final String id, final Map<String, String> peerAddresses,
1517                 ConfigParams config, boolean persistent, TestActorRef<MessageCollectorActor> collectorActor){
1518
1519             return Props.create(CollectingMockRaftActor.class, id, peerAddresses, Optional.of(config),
1520                     persistent, collectorActor);
1521         }
1522
1523     }
1524
1525     public static class MockLeaderRaftActor extends AbstractMockRaftActor {
1526         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
1527                 RaftActorContext fromContext) {
1528             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE, null);
1529             setPersistence(false);
1530
1531             RaftActorContext context = getRaftActorContext();
1532             for(int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
1533                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
1534                 getState().add(entry.getData());
1535                 context.getReplicatedLog().append(entry);
1536             }
1537
1538             context.setCommitIndex(fromContext.getCommitIndex());
1539             context.setLastApplied(fromContext.getLastApplied());
1540             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
1541                     fromContext.getTermInformation().getVotedFor());
1542         }
1543
1544         @Override
1545         protected void initializeBehavior() {
1546             changeCurrentBehavior(new Leader(getRaftActorContext()));
1547             initializeBehaviorComplete.countDown();
1548         }
1549
1550         @Override
1551         public void createSnapshot(ActorRef actorRef) {
1552             try {
1553                 actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef);
1554             } catch (Exception e) {
1555                 LOG.error("createSnapshot failed", e);
1556             }
1557         }
1558
1559         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
1560             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1561             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1562             configParams.setElectionTimeoutFactor(10);
1563             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
1564         }
1565     }
1566
1567     public static class MockNewFollowerRaftActor extends AbstractMockRaftActor {
1568         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1569             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), NO_PERSISTENCE, collectorActor);
1570             setPersistence(false);
1571         }
1572
1573         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1574             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
1575         }
1576     }
1577 }