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
  18 import akka.actor.ActorRef;
  19 import akka.actor.Props;
  20 import akka.actor.UntypedActor;
  21 import akka.dispatch.Dispatchers;
  22 import akka.testkit.JavaTestKit;
  23 import akka.testkit.TestActorRef;
  24 import com.google.common.base.Optional;
  25 import com.google.common.base.Stopwatch;
  26 import com.google.common.collect.ImmutableMap;
  27 import com.google.common.collect.Maps;
  28 import com.google.common.collect.Sets;
  29 import java.util.Arrays;
  30 import java.util.Collections;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.concurrent.TimeUnit;
  34 import org.junit.After;
  35 import org.junit.Before;
  36 import org.junit.Test;
  37 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  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.behaviors.AbstractLeader;
  45 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  46 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  47 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  48 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  49 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  50 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  51 import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus;
  52 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  53 import org.opendaylight.controller.cluster.raft.messages.RemoveServer;
  54 import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply;
  55 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
  56 import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply;
  57 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  58 import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
  59 import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply;
  60 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  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.persisted.SimpleReplicatedLogEntry;
  64 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
  65 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  66 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  67 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  68 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  69 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  70 import org.slf4j.Logger;
  71 import org.slf4j.LoggerFactory;
  72 import scala.concurrent.duration.FiniteDuration;
  73
  74 /**
  75  * Unit tests for RaftActorServerConfigurationSupport.
  76  *
  77  * @author Thomas Pantelis
  78  */
  79 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  80     static final String LEADER_ID = "leader";
  81     static final String FOLLOWER_ID = "follower";
  82     static final String FOLLOWER_ID2 = "follower2";
  83     static final String NEW_SERVER_ID = "new-server";
  84     static final String NEW_SERVER_ID2 = "new-server2";
  85     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  86     private static final Class<?> COMMIT_MESSAGE_CLASS = RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT.getClass();
  87     private static final boolean NO_PERSISTENCE = false;
  88     private static final boolean PERSISTENT = true;
  89
  90     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  91
  92     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
  93             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
  94             actorFactory.generateActorId(FOLLOWER_ID));
  95
  96     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
  97     private TestActorRef<MessageCollectorActor> newFollowerCollectorActor;
  98     private RaftActorContext newFollowerActorContext;
  99
 100     private final JavaTestKit testKit = new JavaTestKit(getSystem());
 101
 102     @Before
 103     public void setup() {
 104         InMemoryJournal.clear();
 105         InMemorySnapshotStore.clear();
 106     }
 107
 108     @SuppressWarnings("checkstyle:IllegalCatch")
 109     private void setupNewFollower() {
 110         DefaultConfigParamsImpl configParams = newFollowerConfigParams();
 111
 112         newFollowerCollectorActor = actorFactory.createTestActor(
 113                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 114                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
 115         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
 116                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
 117                 actorFactory.generateActorId(NEW_SERVER_ID));
 118
 119         try {
 120             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 121         } catch (Exception e) {
 122             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 123         }
 124     }
 125
 126     private static DefaultConfigParamsImpl newFollowerConfigParams() {
 127         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 128         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 129         configParams.setElectionTimeoutFactor(100000);
 130         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 131         return configParams;
 132     }
 133
 134     @After
 135     public void tearDown() throws Exception {
 136         actorFactory.close();
 137     }
 138
 139     @Test
 140     public void testAddServerWithExistingFollower() throws Exception {
 141         LOG.info("testAddServerWithExistingFollower starting");
 142         setupNewFollower();
 143         RaftActorContextImpl followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 144         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 145                 0, 3, 1).build());
 146         followerActorContext.setCommitIndex(2);
 147         followerActorContext.setLastApplied(2);
 148
 149         Follower follower = new Follower(followerActorContext);
 150         followerActor.underlyingActor().setBehavior(follower);
 151         followerActorContext.setCurrentBehavior(follower);
 152
 153         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 154                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 155                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 156                 actorFactory.generateActorId(LEADER_ID));
 157
 158         // Expect initial heartbeat from the leader.
 159         expectFirstMatching(followerActor, AppendEntries.class);
 160         clearMessages(followerActor);
 161
 162         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 163         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 164
 165         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 166
 167         // Leader should install snapshot - capture and verify ApplySnapshot contents
 168
 169         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 170         @SuppressWarnings("unchecked")
 171         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 172         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 173
 174         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 175         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 176         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 177
 178         // Verify ServerConfigurationPayload entry in leader's log
 179
 180         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 181         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 182         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 183         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 184         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 185         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 186                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 187
 188         // Verify ServerConfigurationPayload entry in both followers
 189
 190         expectFirstMatching(followerActor, ApplyState.class);
 191         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 192         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 193                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 194
 195         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 196         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 197         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 198                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 199
 200         // Verify new server config was applied in both followers
 201
 202         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 203
 204         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID),
 205                 newFollowerActorContext.getPeerIds());
 206
 207         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 208         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 209         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 210         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 211
 212         assertEquals("Leader persisted ReplicatedLogImplEntry entries", 0,
 213                 InMemoryJournal.get(LEADER_ID, SimpleReplicatedLogEntry.class).size());
 214         assertEquals("Leader persisted ServerConfigurationPayload entries", 1,
 215                 InMemoryJournal.get(LEADER_ID, ServerConfigurationPayload.class).size());
 216
 217         assertEquals("New follower persisted ReplicatedLogImplEntry entries", 0,
 218                 InMemoryJournal.get(NEW_SERVER_ID, SimpleReplicatedLogEntry.class).size());
 219         assertEquals("New follower persisted ServerConfigurationPayload entries", 1,
 220                 InMemoryJournal.get(NEW_SERVER_ID, ServerConfigurationPayload.class).size());
 221
 222         LOG.info("testAddServerWithExistingFollower ending");
 223     }
 224
 225     @Test
 226     public void testAddServerWithNoExistingFollower() throws Exception {
 227         LOG.info("testAddServerWithNoExistingFollower starting");
 228
 229         setupNewFollower();
 230         RaftActorContext initialActorContext = new MockRaftActorContext();
 231         initialActorContext.setCommitIndex(1);
 232         initialActorContext.setLastApplied(1);
 233         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 234                 0, 2, 1).build());
 235
 236         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 237                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 238                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 239                 actorFactory.generateActorId(LEADER_ID));
 240
 241         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 242         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 243
 244         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 245
 246         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 247
 248         // Leader should install snapshot - capture and verify ApplySnapshot contents
 249
 250         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 251         @SuppressWarnings("unchecked")
 252         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 253         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 254
 255         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 256         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 257         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 258
 259         // Verify ServerConfigurationPayload entry in leader's log
 260
 261         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 262         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 263         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 264         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 265         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 266                 votingServer(NEW_SERVER_ID));
 267
 268         // Verify ServerConfigurationPayload entry in the new follower
 269
 270         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 271         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 272         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 273                 votingServer(NEW_SERVER_ID));
 274
 275         // Verify new server config was applied in the new follower
 276
 277         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 278
 279         LOG.info("testAddServerWithNoExistingFollower ending");
 280     }
 281
 282     @Test
 283     public void testAddServersAsNonVoting() throws Exception {
 284         LOG.info("testAddServersAsNonVoting starting");
 285
 286         setupNewFollower();
 287         RaftActorContext initialActorContext = new MockRaftActorContext();
 288
 289         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 290                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 291                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 292                 actorFactory.generateActorId(LEADER_ID));
 293
 294         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 295         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 296
 297         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 298
 299         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 300
 301         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 302         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 303         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 304
 305         // Verify ServerConfigurationPayload entry in leader's log
 306
 307         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 308
 309         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 310         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 311         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 312         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 313                 nonVotingServer(NEW_SERVER_ID));
 314
 315         // Verify ServerConfigurationPayload entry in the new follower
 316
 317         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 318         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 319         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 320                 nonVotingServer(NEW_SERVER_ID));
 321
 322         // Verify new server config was applied in the new follower
 323
 324         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 325
 326         assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 327
 328         // Add another non-voting server.
 329
 330         clearMessages(leaderCollectorActor);
 331
 332         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 333         Follower newFollower2 = new Follower(follower2ActorContext);
 334         followerActor.underlyingActor().setBehavior(newFollower2);
 335
 336         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 337
 338         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 339         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 340         assertEquals("getLeaderHint", java.util.Optional.of(LEADER_ID), addServerReply.getLeaderHint());
 341
 342         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 343         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 344         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 345         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 346         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 347                 votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 348
 349         LOG.info("testAddServersAsNonVoting ending");
 350     }
 351
 352     @Test
 353     public void testAddServerWithOperationInProgress() throws Exception {
 354         LOG.info("testAddServerWithOperationInProgress starting");
 355
 356         setupNewFollower();
 357         RaftActorContext initialActorContext = new MockRaftActorContext();
 358
 359         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 360                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 361                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 362                 actorFactory.generateActorId(LEADER_ID));
 363
 364         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 365         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 366
 367         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 368
 369         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 370         Follower newFollower2 = new Follower(follower2ActorContext);
 371         followerActor.underlyingActor().setBehavior(newFollower2);
 372
 373         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 374         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.class);
 375
 376         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 377
 378         // Wait for leader's install snapshot and capture it
 379
 380         InstallSnapshot installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 381
 382         // Send a second AddServer - should get queued
 383         JavaTestKit testKit2 = new JavaTestKit(getSystem());
 384         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 385
 386         // Continue the first AddServer
 387         newFollowerRaftActorInstance.setDropMessageOfType(null);
 388         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 389
 390         // Verify both complete successfully
 391         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 392         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 393
 394         addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 395         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 396
 397         // Verify ServerConfigurationPayload entries in leader's log
 398
 399         expectMatching(leaderCollectorActor, ApplyState.class, 2);
 400         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 401         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 402         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 403         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 404                 votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 405
 406         // Verify ServerConfigurationPayload entry in the new follower
 407
 408         expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 409         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2),
 410                newFollowerActorContext.getPeerIds());
 411
 412         LOG.info("testAddServerWithOperationInProgress ending");
 413     }
 414
 415     @Test
 416     public void testAddServerWithPriorSnapshotInProgress() throws Exception {
 417         LOG.info("testAddServerWithPriorSnapshotInProgress starting");
 418
 419         setupNewFollower();
 420         RaftActorContext initialActorContext = new MockRaftActorContext();
 421
 422         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 423                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 424                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 425                 actorFactory.generateActorId(LEADER_ID));
 426
 427         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 428         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 429
 430         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 431
 432         // Drop commit message for now to delay snapshot completion
 433         leaderRaftActor.setDropMessageOfType(String.class);
 434
 435         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 436
 437         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 438
 439         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 440
 441         leaderRaftActor.setDropMessageOfType(null);
 442         leaderActor.tell(commitMsg, leaderActor);
 443
 444         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 445         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 446         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 447
 448         expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 449
 450         // Verify ServerConfigurationPayload entry in leader's log
 451
 452         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 453         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 454         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 455         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 456         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 457                 votingServer(NEW_SERVER_ID));
 458
 459         LOG.info("testAddServerWithPriorSnapshotInProgress ending");
 460     }
 461
 462     @Test
 463     public void testAddServerWithPriorSnapshotCompleteTimeout() throws Exception {
 464         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout starting");
 465
 466         setupNewFollower();
 467         RaftActorContext initialActorContext = new MockRaftActorContext();
 468
 469         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 470                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 471                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 472                 actorFactory.generateActorId(LEADER_ID));
 473
 474         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 475         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 476
 477         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 478
 479         // Drop commit message so the snapshot doesn't complete.
 480         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 481
 482         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 483
 484         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 485
 486         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 487         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 488
 489         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 490
 491         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout ending");
 492     }
 493
 494     @Test
 495     public void testAddServerWithLeaderChangeBeforePriorSnapshotComplete() throws Exception {
 496         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete starting");
 497
 498         setupNewFollower();
 499         RaftActorContext initialActorContext = new MockRaftActorContext();
 500
 501         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 502                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 503                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 504                 actorFactory.generateActorId(LEADER_ID));
 505
 506         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 507         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 508         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 509
 510         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 511
 512         // Drop the commit message so the snapshot doesn't complete yet.
 513         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 514
 515         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 516
 517         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 518
 519         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 520
 521         // Change the leader behavior to follower
 522         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 523
 524         // Drop CaptureSnapshotReply in case install snapshot is incorrectly initiated after the prior
 525         // snapshot completes. This will prevent the invalid snapshot from completing and fail the
 526         // isCapturing assertion below.
 527         leaderRaftActor.setDropMessageOfType(CaptureSnapshotReply.class);
 528
 529         // Complete the prior snapshot - this should be a no-op b/c it's no longer the leader
 530         leaderActor.tell(commitMsg, leaderActor);
 531
 532         leaderActor.tell(new RaftActorServerConfigurationSupport.ServerOperationTimeout(NEW_SERVER_ID), leaderActor);
 533
 534         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 535         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 536
 537         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 538         assertEquals("isCapturing", false, leaderActorContext.getSnapshotManager().isCapturing());
 539
 540         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete ending");
 541     }
 542
 543     @Test
 544     public void testAddServerWithLeaderChangeDuringInstallSnapshot() throws Exception {
 545         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot starting");
 546
 547         setupNewFollower();
 548         RaftActorContext initialActorContext = new MockRaftActorContext();
 549
 550         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 551                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 552                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 553                 actorFactory.generateActorId(LEADER_ID));
 554
 555         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 556         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 557
 558         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(8);
 559
 560         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 561
 562         // Drop the UnInitializedFollowerSnapshotReply to delay it.
 563         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 564
 565         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 566
 567         final UnInitializedFollowerSnapshotReply snapshotReply = expectFirstMatching(leaderCollectorActor,
 568                 UnInitializedFollowerSnapshotReply.class);
 569
 570         // Prevent election timeout when the leader switches to follower
 571         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 572
 573         // Change the leader behavior to follower
 574         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 575
 576         // Send the captured UnInitializedFollowerSnapshotReply - should be a no-op
 577         leaderRaftActor.setDropMessageOfType(null);
 578         leaderActor.tell(snapshotReply, leaderActor);
 579
 580         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 581         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 582
 583         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 584
 585         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot ending");
 586     }
 587
 588     @Test
 589     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 590         LOG.info("testAddServerWithInstallSnapshotTimeout starting");
 591
 592         setupNewFollower();
 593         RaftActorContext initialActorContext = new MockRaftActorContext();
 594
 595         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 596                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 597                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 598                 actorFactory.generateActorId(LEADER_ID));
 599
 600         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 601         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 602         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 603
 604         // Drop the InstallSnapshot message so it times out
 605         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.class);
 606
 607         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 608
 609         leaderActor.tell(new UnInitializedFollowerSnapshotReply("bogus"), leaderActor);
 610
 611         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 612         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 613
 614         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 615         assertEquals("Leader followers size", 0,
 616                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 617
 618         LOG.info("testAddServerWithInstallSnapshotTimeout ending");
 619     }
 620
 621     @Test
 622     public void testAddServerWithNoLeader() {
 623         LOG.info("testAddServerWithNoLeader starting");
 624
 625         setupNewFollower();
 626         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 627         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 628
 629         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 630                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 631                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 632                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 633                 actorFactory.generateActorId(LEADER_ID));
 634         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 635
 636         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 637                 testKit.getRef());
 638         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 639         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 640
 641         LOG.info("testAddServerWithNoLeader ending");
 642     }
 643
 644     @Test
 645     public void testAddServerWithNoConsensusReached() {
 646         LOG.info("testAddServerWithNoConsensusReached starting");
 647
 648         setupNewFollower();
 649         RaftActorContext initialActorContext = new MockRaftActorContext();
 650
 651         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 652                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 653                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 654                 actorFactory.generateActorId(LEADER_ID));
 655
 656         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 657         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 658
 659         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 660
 661         // Drop UnInitializedFollowerSnapshotReply initially
 662         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 663
 664         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 665         newFollowerCollectorActor = newCollectorActor(newFollowerRaftActorInstance, NEW_SERVER_ID);
 666
 667         // Drop AppendEntries to the new follower so consensus isn't reached
 668         newFollowerRaftActorInstance.setDropMessageOfType(AppendEntries.class);
 669
 670         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 671
 672         // Capture the UnInitializedFollowerSnapshotReply
 673         Object snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class);
 674
 675         // Send the UnInitializedFollowerSnapshotReply to resume the first request
 676         leaderRaftActor.setDropMessageOfType(null);
 677         leaderActor.tell(snapshotReply, leaderActor);
 678
 679         expectFirstMatching(newFollowerCollectorActor, AppendEntries.class);
 680
 681         // Send a second AddServer
 682         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 683
 684         // The first AddServer should succeed with OK even though consensus wasn't reached
 685         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 686         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 687         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 688
 689         // Verify ServerConfigurationPayload entry in leader's log
 690         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 691                 votingServer(NEW_SERVER_ID));
 692
 693         // The second AddServer should fail since consensus wasn't reached for the first
 694         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 695         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 696
 697         // Re-send the second AddServer - should also fail
 698         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 699         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 700         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 701
 702         LOG.info("testAddServerWithNoConsensusReached ending");
 703     }
 704
 705     @Test
 706     public void testAddServerWithExistingServer() {
 707         LOG.info("testAddServerWithExistingServer starting");
 708
 709         RaftActorContext initialActorContext = new MockRaftActorContext();
 710
 711         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 712                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 713                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 714                 actorFactory.generateActorId(LEADER_ID));
 715
 716         leaderActor.tell(new AddServer(FOLLOWER_ID, followerActor.path().toString(), true), testKit.getRef());
 717
 718         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 719         assertEquals("getStatus", ServerChangeStatus.ALREADY_EXISTS, addServerReply.getStatus());
 720
 721         LOG.info("testAddServerWithExistingServer ending");
 722     }
 723
 724     @Test
 725     public void testAddServerForwardedToLeader() {
 726         LOG.info("testAddServerForwardedToLeader starting");
 727
 728         setupNewFollower();
 729         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 730         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 731
 732         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 733                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 734                 actorFactory.generateActorId(LEADER_ID));
 735
 736         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 737                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 738                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 739                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 740                 actorFactory.generateActorId(FOLLOWER_ID));
 741         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 742
 743         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 744                 -1, -1, (short)0), leaderActor);
 745
 746         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 747                 testKit.getRef());
 748         expectFirstMatching(leaderActor, AddServer.class);
 749
 750         LOG.info("testAddServerForwardedToLeader ending");
 751     }
 752
 753     @Test
 754     public void testOnApplyState() {
 755         LOG.info("testOnApplyState starting");
 756
 757         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 758         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 759         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 760                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 761                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 762                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 763                 actorFactory.generateActorId(LEADER_ID));
 764
 765         RaftActorServerConfigurationSupport support = new RaftActorServerConfigurationSupport(
 766                 noLeaderActor.underlyingActor());
 767
 768         ReplicatedLogEntry serverConfigEntry = new SimpleReplicatedLogEntry(1, 1,
 769                 new ServerConfigurationPayload(Collections.<ServerInfo>emptyList()));
 770         boolean handled = support.handleMessage(new ApplyState(null, null, serverConfigEntry), ActorRef.noSender());
 771         assertEquals("Message handled", true, handled);
 772
 773         ReplicatedLogEntry nonServerConfigEntry = new SimpleReplicatedLogEntry(1, 1,
 774                 new MockRaftActorContext.MockPayload("1"));
 775         handled = support.handleMessage(new ApplyState(null, null, nonServerConfigEntry), ActorRef.noSender());
 776         assertEquals("Message handled", false, handled);
 777
 778         LOG.info("testOnApplyState ending");
 779     }
 780
 781     @Test
 782     public void testRemoveServerWithNoLeader() {
 783         LOG.info("testRemoveServerWithNoLeader starting");
 784
 785         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 786         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 787
 788         TestActorRef<MockRaftActor> leaderActor = actorFactory.createTestActor(
 789                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 790                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 791                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 792                 actorFactory.generateActorId(LEADER_ID));
 793         leaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 794
 795         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 796         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 797                 RemoveServerReply.class);
 798         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, removeServerReply.getStatus());
 799
 800         LOG.info("testRemoveServerWithNoLeader ending");
 801     }
 802
 803     @Test
 804     public void testRemoveServerNonExistentServer() {
 805         LOG.info("testRemoveServerNonExistentServer starting");
 806
 807         RaftActorContext initialActorContext = new MockRaftActorContext();
 808
 809         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 810                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 811                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 812                 actorFactory.generateActorId(LEADER_ID));
 813
 814         leaderActor.tell(new RemoveServer(NEW_SERVER_ID), testKit.getRef());
 815         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 816                 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         final TestActorRef<MessageCollectorActor> leaderCollector =
 867                 newLeaderCollectorActor(leaderActor.underlyingActor());
 868
 869         TestActorRef<MessageCollectorActor> collector = actorFactory.createTestActor(MessageCollectorActor.props()
 870                 .withDispatcher(Dispatchers.DefaultDispatcherId()),
 871                         actorFactory.generateActorId("collector"));
 872         actorFactory.createTestActor(
 873                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 874                         configParams, NO_PERSISTENCE, collector).withDispatcher(Dispatchers.DefaultDispatcherId()),
 875                 followerActorId);
 876
 877         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 878         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 879                 RemoveServerReply.class);
 880         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 881
 882         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
 883         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 884         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 885                 votingServer(LEADER_ID));
 886
 887         RaftActorBehavior currentBehavior = leaderActor.underlyingActor().getCurrentBehavior();
 888         assertTrue("Expected Leader", currentBehavior instanceof Leader);
 889         assertEquals("Follower ids size", 0, ((Leader)currentBehavior).getFollowerIds().size());
 890
 891         MessageCollectorActor.expectFirstMatching(collector, ServerRemoved.class);
 892
 893         LOG.info("testRemoveServer ending");
 894     }
 895
 896     @Test
 897     public void testRemoveServerLeader() {
 898         LOG.info("testRemoveServerLeader starting");
 899
 900         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 901         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 902         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 903
 904         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 905         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 906         RaftActorContext initialActorContext = new MockRaftActorContext();
 907
 908         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 909                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 910                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 911                 actorFactory.generateActorId(LEADER_ID));
 912
 913         final TestActorRef<MessageCollectorActor> leaderCollector =
 914                 newLeaderCollectorActor(leaderActor.underlyingActor());
 915
 916         final TestActorRef<MessageCollectorActor> followerCollector =
 917                 actorFactory.createTestActor(MessageCollectorActor.props()
 918                 .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector"));
 919         actorFactory.createTestActor(
 920                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 921                         configParams, NO_PERSISTENCE, followerCollector)
 922                         .withDispatcher(Dispatchers.DefaultDispatcherId()),
 923                 followerActorId);
 924
 925         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 926         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 927                 RemoveServerReply.class);
 928         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 929
 930         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(followerCollector, ApplyState.class);
 931         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 932         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 933                 votingServer(FOLLOWER_ID));
 934
 935         MessageCollectorActor.expectFirstMatching(leaderCollector, ServerRemoved.class);
 936
 937         LOG.info("testRemoveServerLeader ending");
 938     }
 939
 940     @Test
 941     public void testRemoveServerLeaderWithNoFollowers() {
 942         LOG.info("testRemoveServerLeaderWithNoFollowers starting");
 943
 944         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 945                 MockLeaderRaftActor.props(Collections.<String, String>emptyMap(),
 946                         new MockRaftActorContext()).withDispatcher(Dispatchers.DefaultDispatcherId()),
 947                 actorFactory.generateActorId(LEADER_ID));
 948
 949         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 950         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 951                 RemoveServerReply.class);
 952         assertEquals("getStatus", ServerChangeStatus.NOT_SUPPORTED, removeServerReply.getStatus());
 953
 954         LOG.info("testRemoveServerLeaderWithNoFollowers ending");
 955     }
 956
 957     @Test
 958     public void testChangeServersVotingStatus() {
 959         LOG.info("testChangeServersVotingStatus starting");
 960
 961         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 962         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 963         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 964
 965         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
 966         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
 967         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
 968         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
 969
 970         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 971                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
 972                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
 973                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
 974         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 975
 976         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
 977                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 978                 actorFactory.generateActorId("collector"));
 979         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
 980                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 981                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
 982                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
 983
 984         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
 985                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 986                 actorFactory.generateActorId("collector"));
 987         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
 988                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 989                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
 990                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
 991
 992         // Send first ChangeServersVotingStatus message
 993
 994         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, false, FOLLOWER_ID2, false)),
 995                 testKit.getRef());
 996         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
 997         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
 998
 999         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1000         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
1001         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1002                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1003
1004         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1005         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1006                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1007                 nonVotingServer(FOLLOWER_ID2));
1008
1009         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1010         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1011                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1012                 nonVotingServer(FOLLOWER_ID2));
1013
1014         MessageCollectorActor.clearMessages(leaderCollector);
1015         MessageCollectorActor.clearMessages(follower1Collector);
1016         MessageCollectorActor.clearMessages(follower2Collector);
1017
1018         // Send second ChangeServersVotingStatus message
1019
1020         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, true)), testKit.getRef());
1021         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1022         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1023
1024         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1025         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1026                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1027
1028         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1029         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1030                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1031
1032         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1033         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1034                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1035
1036         LOG.info("testChangeServersVotingStatus ending");
1037     }
1038
1039     @Test
1040     public void testChangeLeaderToNonVoting() {
1041         LOG.info("testChangeLeaderToNonVoting starting");
1042
1043         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1044         configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS));
1045
1046         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
1047         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
1048         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
1049         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
1050
1051         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1052                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
1053                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
1054                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1055         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
1056
1057         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
1058                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1059                 actorFactory.generateActorId("collector"));
1060         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
1061                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1062                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
1063                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
1064
1065         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
1066                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1067                 actorFactory.generateActorId("collector"));
1068         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
1069                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1070                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
1071                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
1072
1073         // Send ChangeServersVotingStatus message
1074
1075         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1076         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1077         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1078
1079         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1080         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1081                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1082
1083         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1084         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1085                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1086
1087         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1088         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1089                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1090
1091         verifyRaftState(RaftState.Leader, follower1RaftActor.underlyingActor(), follower2RaftActor.underlyingActor());
1092         verifyRaftState(RaftState.Follower, leaderActor.underlyingActor());
1093
1094         MessageCollectorActor.expectMatching(leaderCollector, AppendEntries.class, 2);
1095
1096         LOG.info("testChangeLeaderToNonVoting ending");
1097     }
1098
1099     @Test
1100     public void testChangeLeaderToNonVotingInSingleNode() {
1101         LOG.info("testChangeLeaderToNonVotingInSingleNode starting");
1102
1103         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1104                 MockLeaderRaftActor.props(ImmutableMap.of(), new MockRaftActorContext())
1105                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1106
1107         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1108         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1109         assertEquals("getStatus", ServerChangeStatus.INVALID_REQUEST, reply.getStatus());
1110
1111         LOG.info("testChangeLeaderToNonVotingInSingleNode ending");
1112     }
1113
1114     @Test
1115     public void testChangeToVotingWithNoLeader() {
1116         LOG.info("testChangeToVotingWithNoLeader starting");
1117
1118         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1119         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1120         configParams.setElectionTimeoutFactor(5);
1121
1122         final String node1ID = "node1";
1123         final String node2ID = "node2";
1124
1125         // Set up a persisted ServerConfigurationPayload. Initially node1 and node2 will come up as non-voting.
1126         // via the server config. The server config will also contain 2 voting peers that are down (ie no
1127         // actors created).
1128
1129         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1130                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false),
1131                 new ServerInfo("downNode1", true), new ServerInfo("downNode2", true)));
1132         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1133
1134         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "downNode1"));
1135         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1136         InMemoryJournal.addEntry(node1ID, 3, new ApplyJournalEntries(0));
1137         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "downNode2"));
1138         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1139         InMemoryJournal.addEntry(node2ID, 3, new ApplyJournalEntries(0));
1140
1141         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1142                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1143                 actorFactory.generateActorId("collector"));
1144         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1145                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1146                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1147         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1148
1149         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1150                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1151                 actorFactory.generateActorId("collector"));
1152         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1153                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1154                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1155         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1156
1157         node1RaftActor.waitForInitializeBehaviorComplete();
1158         node2RaftActor.waitForInitializeBehaviorComplete();
1159
1160         // Verify the intended server config was loaded and applied.
1161         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1162                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1163                 votingServer("downNode2"));
1164         assertEquals("isVotingMember", false, node1RaftActor.getRaftActorContext().isVotingMember());
1165         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1166         assertEquals("getLeaderId", null, node1RaftActor.getLeaderId());
1167
1168         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1169                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1170                 votingServer("downNode2"));
1171         assertEquals("isVotingMember", false, node2RaftActor.getRaftActorContext().isVotingMember());
1172
1173         // For the test, we send a ChangeServersVotingStatus message to node1 to flip the voting states for
1174         // each server, ie node1 and node2 to voting and the 2 down nodes to non-voting. This should cause
1175         // node1 to try to elect itself as leader in order to apply the new server config. Since the 2
1176         // down nodes are switched to non-voting, node1 should only need a vote from node2.
1177
1178         // First send the message such that node1 has no peer address for node2 - should fail.
1179
1180         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1181                 node2ID, true, "downNode1", false, "downNode2", false));
1182         node1RaftActorRef.tell(changeServers, testKit.getRef());
1183         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1184         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1185
1186         // Send an AppendEntries so node1 has a leaderId
1187
1188         MessageCollectorActor.clearMessages(node1Collector);
1189
1190         long term = node1RaftActor.getRaftActorContext().getTermInformation().getCurrentTerm();
1191         node1RaftActorRef.tell(new AppendEntries(term, "downNode1", -1L, -1L,
1192                 Collections.<ReplicatedLogEntry>emptyList(), 0, -1, (short)1), ActorRef.noSender());
1193
1194         // Wait for the ElectionTimeout to clear the leaderId. he leaderId must be null so on the
1195         // ChangeServersVotingStatus message, it will try to elect a leader.
1196
1197         MessageCollectorActor.expectFirstMatching(node1Collector, ElectionTimeout.class);
1198
1199         // Update node2's peer address and send the message again
1200
1201         node1RaftActor.setPeerAddress(node2ID, node2RaftActorRef.path().toString());
1202
1203         node1RaftActorRef.tell(changeServers, testKit.getRef());
1204         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1205         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1206
1207         ApplyJournalEntries apply = MessageCollectorActor.expectFirstMatching(node1Collector,
1208                 ApplyJournalEntries.class);
1209         assertEquals("getToIndex", 1, apply.getToIndex());
1210         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1211                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1212                 nonVotingServer("downNode2"));
1213         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1214         assertEquals("getRaftState", RaftState.Leader, node1RaftActor.getRaftState());
1215
1216         apply = MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1217         assertEquals("getToIndex", 1, apply.getToIndex());
1218         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1219                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1220                 nonVotingServer("downNode2"));
1221         assertEquals("isVotingMember", true, node2RaftActor.getRaftActorContext().isVotingMember());
1222         assertEquals("getRaftState", RaftState.Follower, node2RaftActor.getRaftState());
1223
1224         LOG.info("testChangeToVotingWithNoLeader ending");
1225     }
1226
1227     @Test
1228     public void testChangeToVotingWithNoLeaderAndElectionTimeout() {
1229         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout starting");
1230
1231         final String node1ID = "node1";
1232         final String node2ID = "node2";
1233
1234         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1235                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1236                         ? actorFactory.createTestActorPath(node2ID) : null;
1237
1238         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1239                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1240         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1241
1242         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1243         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1244         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1245         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1246
1247         DefaultConfigParamsImpl configParams1 = new DefaultConfigParamsImpl();
1248         configParams1.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1249         configParams1.setElectionTimeoutFactor(1);
1250         configParams1.setPeerAddressResolver(peerAddressResolver);
1251         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1252                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1253                 actorFactory.generateActorId("collector"));
1254         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1255                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams1,
1256                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1257         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1258
1259         DefaultConfigParamsImpl configParams2 = new DefaultConfigParamsImpl();
1260         configParams2.setElectionTimeoutFactor(1000000);
1261         configParams2.setPeerAddressResolver(peerAddressResolver);
1262         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1263                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1264                 actorFactory.generateActorId("collector"));
1265         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1266                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams2,
1267                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1268         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1269
1270         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1271         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1272         // RequestVote messages in node2 which should cause node1 to time out and revert back to the previous
1273         // server config and fail with NO_LEADER. Note that node1 shouldn't forward the request to node2 b/c
1274         // node2 was previously voting.
1275
1276         node2RaftActor.setDropMessageOfType(RequestVote.class);
1277
1278         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true));
1279         node1RaftActorRef.tell(changeServers, testKit.getRef());
1280         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1281         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1282
1283         assertEquals("Server config", Sets.newHashSet(nonVotingServer(node1ID), votingServer(node2ID)),
1284                 Sets.newHashSet(node1RaftActor.getRaftActorContext().getPeerServerInfo(true).getServerConfig()));
1285         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1286
1287         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout ending");
1288     }
1289
1290     @Test
1291     public void testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout() {
1292         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout starting");
1293
1294         final String node1ID = "node1";
1295         final String node2ID = "node2";
1296
1297         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1298                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1299                         ? actorFactory.createTestActorPath(node2ID) : null;
1300
1301         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1302         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1303         configParams.setElectionTimeoutFactor(3);
1304         configParams.setPeerAddressResolver(peerAddressResolver);
1305
1306         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1307                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false)));
1308         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1309
1310         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1311         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1312         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1313         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1314         InMemoryJournal.addEntry(node2ID, 3, new SimpleReplicatedLogEntry(1, 1,
1315                 new MockRaftActorContext.MockPayload("2")));
1316         InMemoryJournal.addEntry(node2ID, 4, new ApplyJournalEntries(1));
1317
1318         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1319                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1320                 actorFactory.generateActorId("collector"));
1321         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1322                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1323                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1324         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1325
1326         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1327                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1328                 actorFactory.generateActorId("collector"));
1329         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1330                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1331                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1332         final CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1333
1334         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1335         // node1 to try to elect itself as leader in order to apply the new server config. However node1's log
1336         // is behind node2's so node2 should not grant node1's vote. This should cause node1 to time out and
1337         // forward the request to node2.
1338
1339         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(
1340                 ImmutableMap.of(node1ID, true, node2ID, true));
1341         node1RaftActorRef.tell(changeServers, testKit.getRef());
1342         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1343         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1344
1345         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1346         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1347                 votingServer(node1ID), votingServer(node2ID));
1348         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1349
1350         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1351         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1352                 votingServer(node1ID), votingServer(node2ID));
1353         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1354         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1355
1356         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout ending");
1357     }
1358
1359     @Test
1360     public void testChangeToVotingWithNoLeaderAndOtherLeaderElected() {
1361         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected starting");
1362
1363         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1364         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1365         configParams.setElectionTimeoutFactor(100000);
1366
1367         final String node1ID = "node1";
1368         final String node2ID = "node2";
1369
1370         configParams.setPeerAddressResolver(peerId -> peerId.equals(node1ID)
1371                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1372                         ? actorFactory.createTestActorPath(node2ID) : null);
1373
1374         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1375                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1376         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1377
1378         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1379         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1380         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1381         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1382
1383         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1384                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1385                 actorFactory.generateActorId("collector"));
1386         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1387                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1388                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1389         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1390
1391         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1392                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1393                 actorFactory.generateActorId("collector"));
1394         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1395                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1396                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1397         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1398
1399         // Send a ChangeServersVotingStatus message to node1 to change node1 to voting. This should cause
1400         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1401         // RequestVote messages in node2 and make it the leader so node1 should forward the server change
1402         // request to node2 when node2 is elected.
1403
1404         node2RaftActor.setDropMessageOfType(RequestVote.class);
1405
1406         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1407                 node2ID, true));
1408         node1RaftActorRef.tell(changeServers, testKit.getRef());
1409
1410         MessageCollectorActor.expectFirstMatching(node2Collector, RequestVote.class);
1411
1412         node2RaftActorRef.tell(TimeoutNow.INSTANCE, ActorRef.noSender());
1413
1414         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1415         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1416
1417         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1418         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1419                 votingServer(node1ID), votingServer(node2ID));
1420         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1421         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1422
1423         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1424         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1425                 votingServer(node1ID), votingServer(node2ID));
1426         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1427
1428         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected ending");
1429     }
1430
1431     private static void verifyRaftState(RaftState expState, RaftActor... raftActors) {
1432         Stopwatch sw = Stopwatch.createStarted();
1433         while (sw.elapsed(TimeUnit.SECONDS) <= 5) {
1434             for (RaftActor raftActor : raftActors) {
1435                 if (raftActor.getRaftState() == expState) {
1436                     return;
1437                 }
1438             }
1439         }
1440
1441         fail("None of the RaftActors have state " + expState);
1442     }
1443
1444     private static ServerInfo votingServer(String id) {
1445         return new ServerInfo(id, true);
1446     }
1447
1448     private static ServerInfo nonVotingServer(String id) {
1449         return new ServerInfo(id, false);
1450     }
1451
1452     private TestActorRef<MessageCollectorActor> newLeaderCollectorActor(MockLeaderRaftActor leaderRaftActor) {
1453         return newCollectorActor(leaderRaftActor, LEADER_ID);
1454     }
1455
1456     private TestActorRef<MessageCollectorActor> newCollectorActor(AbstractMockRaftActor raftActor, String id) {
1457         TestActorRef<MessageCollectorActor> collectorActor = actorFactory.createTestActor(
1458                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1459                 actorFactory.generateActorId(id + "Collector"));
1460         raftActor.setCollectorActor(collectorActor);
1461         return collectorActor;
1462     }
1463
1464     private static void verifyServerConfigurationPayloadEntry(ReplicatedLog log, ServerInfo... expected) {
1465         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
1466         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
1467         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
1468         assertEquals("Server config", Sets.newHashSet(expected), Sets.newHashSet(payload.getServerConfig()));
1469     }
1470
1471     private static RaftActorContextImpl newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
1472         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1473         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1474         configParams.setElectionTimeoutFactor(100000);
1475         NonPersistentDataProvider noPersistence = new NonPersistentDataProvider();
1476         ElectionTermImpl termInfo = new ElectionTermImpl(noPersistence, id, LOG);
1477         termInfo.update(1, LEADER_ID);
1478         return new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
1479                 id, termInfo, -1, -1, ImmutableMap.of(LEADER_ID, ""), configParams,
1480                 noPersistence, applyState -> actor.tell(applyState, actor), LOG);
1481     }
1482
1483     abstract static class AbstractMockRaftActor extends MockRaftActor {
1484         private volatile TestActorRef<MessageCollectorActor> collectorActor;
1485         private volatile Class<?> dropMessageOfType;
1486
1487         AbstractMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1488                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1489             super(builder().id(id).peerAddresses(peerAddresses).config(config.get())
1490                     .persistent(Optional.of(persistent)));
1491             this.collectorActor = collectorActor;
1492         }
1493
1494         void setDropMessageOfType(Class<?> dropMessageOfType) {
1495             this.dropMessageOfType = dropMessageOfType;
1496         }
1497
1498         void setCollectorActor(TestActorRef<MessageCollectorActor> collectorActor) {
1499             this.collectorActor = collectorActor;
1500         }
1501
1502         @Override
1503         public void handleCommand(Object message) {
1504             if (dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
1505                 super.handleCommand(message);
1506             }
1507
1508             if (collectorActor != null) {
1509                 collectorActor.tell(message, getSender());
1510             }
1511         }
1512     }
1513
1514     public static class CollectingMockRaftActor extends AbstractMockRaftActor {
1515
1516         CollectingMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1517                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1518             super(id, peerAddresses, config, persistent, collectorActor);
1519             snapshotCohortDelegate = new RaftActorSnapshotCohort() {
1520                 @Override
1521                 public void createSnapshot(ActorRef actorRef) {
1522                     actorRef.tell(new CaptureSnapshotReply(new byte[0]), actorRef);
1523                 }
1524
1525                 @Override
1526                 public void applySnapshot(byte[] snapshotBytes) {
1527                 }
1528             };
1529         }
1530
1531         public static Props props(final String id, final Map<String, String> peerAddresses,
1532                 ConfigParams config, boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1533
1534             return Props.create(CollectingMockRaftActor.class, id, peerAddresses, Optional.of(config),
1535                     persistent, collectorActor);
1536         }
1537
1538     }
1539
1540     public static class MockLeaderRaftActor extends AbstractMockRaftActor {
1541         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
1542                 RaftActorContext fromContext) {
1543             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE, null);
1544             setPersistence(false);
1545
1546             RaftActorContext context = getRaftActorContext();
1547             for (int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
1548                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
1549                 getState().add(entry.getData());
1550                 context.getReplicatedLog().append(entry);
1551             }
1552
1553             context.setCommitIndex(fromContext.getCommitIndex());
1554             context.setLastApplied(fromContext.getLastApplied());
1555             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
1556                     fromContext.getTermInformation().getVotedFor());
1557         }
1558
1559         @Override
1560         protected void initializeBehavior() {
1561             changeCurrentBehavior(new Leader(getRaftActorContext()));
1562             initializeBehaviorComplete.countDown();
1563         }
1564
1565         @Override
1566         @SuppressWarnings("checkstyle:IllegalCatch")
1567         public void createSnapshot(ActorRef actorRef) {
1568             try {
1569                 actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef);
1570             } catch (Exception e) {
1571                 LOG.error("createSnapshot failed", e);
1572             }
1573         }
1574
1575         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
1576             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1577             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1578             configParams.setElectionTimeoutFactor(10);
1579             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
1580         }
1581     }
1582
1583     public static class MockNewFollowerRaftActor extends AbstractMockRaftActor {
1584         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1585             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), NO_PERSISTENCE,
1586                     collectorActor);
1587             setPersistence(false);
1588         }
1589
1590         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1591             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
1592         }
1593     }
1594 }