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 com.google.common.io.ByteSource;
  30 import java.io.OutputStream;
  31 import java.util.ArrayList;
  32 import java.util.Arrays;
  33 import java.util.Collections;
  34 import java.util.List;
  35 import java.util.Map;
  36 import java.util.concurrent.TimeUnit;
  37 import org.apache.commons.lang3.SerializationUtils;
  38 import org.junit.After;
  39 import org.junit.Before;
  40 import org.junit.Test;
  41 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  42 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  43 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  44 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  45 import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout;
  46 import org.opendaylight.controller.cluster.raft.base.messages.InitiateCaptureSnapshot;
  47 import org.opendaylight.controller.cluster.raft.base.messages.TimeoutNow;
  48 import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
  49 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  50 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  51 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  52 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  53 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  54 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  55 import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus;
  56 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  57 import org.opendaylight.controller.cluster.raft.messages.RemoveServer;
  58 import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply;
  59 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
  60 import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply;
  61 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  62 import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
  63 import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply;
  64 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  65 import org.opendaylight.controller.cluster.raft.persisted.ByteState;
  66 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  67 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
  68 import org.opendaylight.controller.cluster.raft.persisted.SimpleReplicatedLogEntry;
  69 import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm;
  70 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  71 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  72 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  73 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  74 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  75 import org.slf4j.Logger;
  76 import org.slf4j.LoggerFactory;
  77 import scala.concurrent.duration.FiniteDuration;
  78
  79 /**
  80  * Unit tests for RaftActorServerConfigurationSupport.
  81  *
  82  * @author Thomas Pantelis
  83  */
  84 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  85     static final String LEADER_ID = "leader";
  86     static final String FOLLOWER_ID = "follower";
  87     static final String FOLLOWER_ID2 = "follower2";
  88     static final String NEW_SERVER_ID = "new-server";
  89     static final String NEW_SERVER_ID2 = "new-server2";
  90     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  91     private static final Class<?> COMMIT_MESSAGE_CLASS = RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT.getClass();
  92     private static final boolean NO_PERSISTENCE = false;
  93     private static final boolean PERSISTENT = true;
  94
  95     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  96
  97     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
  98             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
  99             actorFactory.generateActorId(FOLLOWER_ID));
 100
 101     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
 102     private TestActorRef<MessageCollectorActor> newFollowerCollectorActor;
 103     private RaftActorContext newFollowerActorContext;
 104
 105     private final JavaTestKit testKit = new JavaTestKit(getSystem());
 106
 107     @Before
 108     public void setup() {
 109         InMemoryJournal.clear();
 110         InMemorySnapshotStore.clear();
 111     }
 112
 113     @SuppressWarnings("checkstyle:IllegalCatch")
 114     private void setupNewFollower() {
 115         DefaultConfigParamsImpl configParams = newFollowerConfigParams();
 116
 117         newFollowerCollectorActor = actorFactory.createTestActor(
 118                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 119                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
 120         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
 121                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
 122                 actorFactory.generateActorId(NEW_SERVER_ID));
 123
 124         try {
 125             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 126         } catch (Exception e) {
 127             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
 128         }
 129     }
 130
 131     private static DefaultConfigParamsImpl newFollowerConfigParams() {
 132         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 133         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 134         configParams.setElectionTimeoutFactor(100000);
 135         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 136         return configParams;
 137     }
 138
 139     @After
 140     public void tearDown() throws Exception {
 141         actorFactory.close();
 142     }
 143
 144     @Test
 145     public void testAddServerWithExistingFollower() throws Exception {
 146         LOG.info("testAddServerWithExistingFollower starting");
 147         setupNewFollower();
 148         RaftActorContextImpl followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 149         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 150                 0, 3, 1).build());
 151         followerActorContext.setCommitIndex(2);
 152         followerActorContext.setLastApplied(2);
 153
 154         Follower follower = new Follower(followerActorContext);
 155         followerActor.underlyingActor().setBehavior(follower);
 156         followerActorContext.setCurrentBehavior(follower);
 157
 158         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 159                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 160                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 161                 actorFactory.generateActorId(LEADER_ID));
 162
 163         // Expect initial heartbeat from the leader.
 164         expectFirstMatching(followerActor, AppendEntries.class);
 165         clearMessages(followerActor);
 166
 167         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 168         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 169
 170         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 171
 172         // Leader should install snapshot - capture and verify ApplySnapshot contents
 173
 174         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 175         List<Object> snapshotState = MockRaftActor.fromState(applySnapshot.getSnapshot().getState());
 176         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 177
 178         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 179         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 180         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 181
 182         // Verify ServerConfigurationPayload entry in leader's log
 183
 184         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 185         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 186         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 187         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 188         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 189         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 190                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 191
 192         // Verify ServerConfigurationPayload entry in both followers
 193
 194         expectFirstMatching(followerActor, ApplyState.class);
 195         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 196         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 197                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 198
 199         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 200         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 201         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 202                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 203
 204         // Verify new server config was applied in both followers
 205
 206         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 207
 208         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID),
 209                 newFollowerActorContext.getPeerIds());
 210
 211         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 212         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 213         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 214         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 215
 216         assertEquals("Leader persisted ReplicatedLogImplEntry entries", 0,
 217                 InMemoryJournal.get(LEADER_ID, SimpleReplicatedLogEntry.class).size());
 218         assertEquals("Leader persisted ServerConfigurationPayload entries", 1,
 219                 InMemoryJournal.get(LEADER_ID, ServerConfigurationPayload.class).size());
 220
 221         assertEquals("New follower persisted ReplicatedLogImplEntry entries", 0,
 222                 InMemoryJournal.get(NEW_SERVER_ID, SimpleReplicatedLogEntry.class).size());
 223         assertEquals("New follower persisted ServerConfigurationPayload entries", 1,
 224                 InMemoryJournal.get(NEW_SERVER_ID, ServerConfigurationPayload.class).size());
 225
 226         LOG.info("testAddServerWithExistingFollower ending");
 227     }
 228
 229     @Test
 230     public void testAddServerWithNoExistingFollower() throws Exception {
 231         LOG.info("testAddServerWithNoExistingFollower starting");
 232
 233         setupNewFollower();
 234         RaftActorContext initialActorContext = new MockRaftActorContext();
 235         initialActorContext.setCommitIndex(1);
 236         initialActorContext.setLastApplied(1);
 237         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 238                 0, 2, 1).build());
 239
 240         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 241                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 242                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 243                 actorFactory.generateActorId(LEADER_ID));
 244
 245         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 246         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 247
 248         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 249
 250         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 251
 252         // Leader should install snapshot - capture and verify ApplySnapshot contents
 253
 254         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 255         List<Object> snapshotState = MockRaftActor.fromState(applySnapshot.getSnapshot().getState());
 256         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 257
 258         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 259         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 260         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 261
 262         // Verify ServerConfigurationPayload entry in leader's log
 263
 264         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 265         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 266         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 267         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 268         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 269                 votingServer(NEW_SERVER_ID));
 270
 271         // Verify ServerConfigurationPayload entry in the new follower
 272
 273         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 274         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 275         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 276                 votingServer(NEW_SERVER_ID));
 277
 278         // Verify new server config was applied in the new follower
 279
 280         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 281
 282         LOG.info("testAddServerWithNoExistingFollower ending");
 283     }
 284
 285     @Test
 286     public void testAddServersAsNonVoting() throws Exception {
 287         LOG.info("testAddServersAsNonVoting starting");
 288
 289         setupNewFollower();
 290         RaftActorContext initialActorContext = new MockRaftActorContext();
 291
 292         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 293                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 294                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 295                 actorFactory.generateActorId(LEADER_ID));
 296
 297         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 298         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 299
 300         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 301
 302         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 303
 304         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 305         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 306         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 307
 308         // Verify ServerConfigurationPayload entry in leader's log
 309
 310         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 311
 312         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 313         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 314         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 315         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 316                 nonVotingServer(NEW_SERVER_ID));
 317
 318         // Verify ServerConfigurationPayload entry in the new follower
 319
 320         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 321         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 322         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 323                 nonVotingServer(NEW_SERVER_ID));
 324
 325         // Verify new server config was applied in the new follower
 326
 327         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 328
 329         assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 330
 331         // Add another non-voting server.
 332
 333         clearMessages(leaderCollectorActor);
 334
 335         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 336         Follower newFollower2 = new Follower(follower2ActorContext);
 337         followerActor.underlyingActor().setBehavior(newFollower2);
 338
 339         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 340
 341         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 342         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 343         assertEquals("getLeaderHint", java.util.Optional.of(LEADER_ID), addServerReply.getLeaderHint());
 344
 345         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 346         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 347         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 348         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 349         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 350                 votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 351
 352         LOG.info("testAddServersAsNonVoting ending");
 353     }
 354
 355     @Test
 356     public void testAddServerWithOperationInProgress() throws Exception {
 357         LOG.info("testAddServerWithOperationInProgress starting");
 358
 359         setupNewFollower();
 360         RaftActorContext initialActorContext = new MockRaftActorContext();
 361
 362         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 363                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 364                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 365                 actorFactory.generateActorId(LEADER_ID));
 366
 367         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 368         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 369
 370         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 371
 372         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 373         Follower newFollower2 = new Follower(follower2ActorContext);
 374         followerActor.underlyingActor().setBehavior(newFollower2);
 375
 376         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 377         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.class);
 378
 379         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 380
 381         // Wait for leader's install snapshot and capture it
 382
 383         InstallSnapshot installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 384
 385         // Send a second AddServer - should get queued
 386         JavaTestKit testKit2 = new JavaTestKit(getSystem());
 387         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 388
 389         // Continue the first AddServer
 390         newFollowerRaftActorInstance.setDropMessageOfType(null);
 391         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 392
 393         // Verify both complete successfully
 394         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 395         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 396
 397         addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 398         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 399
 400         // Verify ServerConfigurationPayload entries in leader's log
 401
 402         expectMatching(leaderCollectorActor, ApplyState.class, 2);
 403         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 404         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 405         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 406         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 407                 votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 408
 409         // Verify ServerConfigurationPayload entry in the new follower
 410
 411         expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 412         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2),
 413                newFollowerActorContext.getPeerIds());
 414
 415         LOG.info("testAddServerWithOperationInProgress ending");
 416     }
 417
 418     @Test
 419     public void testAddServerWithPriorSnapshotInProgress() throws Exception {
 420         LOG.info("testAddServerWithPriorSnapshotInProgress starting");
 421
 422         setupNewFollower();
 423         RaftActorContext initialActorContext = new MockRaftActorContext();
 424
 425         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 426                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 427                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 428                 actorFactory.generateActorId(LEADER_ID));
 429
 430         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 431         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 432
 433         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 434
 435         // Drop commit message for now to delay snapshot completion
 436         leaderRaftActor.setDropMessageOfType(String.class);
 437
 438         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 439
 440         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 441
 442         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 443
 444         leaderRaftActor.setDropMessageOfType(null);
 445         leaderActor.tell(commitMsg, leaderActor);
 446
 447         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 448         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 449         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 450
 451         expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 452
 453         // Verify ServerConfigurationPayload entry in leader's log
 454
 455         expectFirstMatching(leaderCollectorActor, ApplyState.class);
 456         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 457         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 458         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 459         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 460                 votingServer(NEW_SERVER_ID));
 461
 462         LOG.info("testAddServerWithPriorSnapshotInProgress ending");
 463     }
 464
 465     @Test
 466     public void testAddServerWithPriorSnapshotCompleteTimeout() throws Exception {
 467         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout starting");
 468
 469         setupNewFollower();
 470         RaftActorContext initialActorContext = new MockRaftActorContext();
 471
 472         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 473                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 474                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 475                 actorFactory.generateActorId(LEADER_ID));
 476
 477         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 478         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 479
 480         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 481
 482         // Drop commit message so the snapshot doesn't complete.
 483         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 484
 485         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 486
 487         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 488
 489         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 490         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 491
 492         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 493
 494         LOG.info("testAddServerWithPriorSnapshotCompleteTimeout ending");
 495     }
 496
 497     @Test
 498     public void testAddServerWithLeaderChangeBeforePriorSnapshotComplete() throws Exception {
 499         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete starting");
 500
 501         setupNewFollower();
 502         RaftActorContext initialActorContext = new MockRaftActorContext();
 503
 504         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 505                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 506                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 507                 actorFactory.generateActorId(LEADER_ID));
 508
 509         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 510         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 511         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 512
 513         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 514
 515         // Drop the commit message so the snapshot doesn't complete yet.
 516         leaderRaftActor.setDropMessageOfType(COMMIT_MESSAGE_CLASS);
 517
 518         leaderActor.tell(new InitiateCaptureSnapshot(), leaderActor);
 519
 520         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 521
 522         Object commitMsg = expectFirstMatching(leaderCollectorActor, COMMIT_MESSAGE_CLASS);
 523
 524         // Change the leader behavior to follower
 525         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 526
 527         // Drop CaptureSnapshotReply in case install snapshot is incorrectly initiated after the prior
 528         // snapshot completes. This will prevent the invalid snapshot from completing and fail the
 529         // isCapturing assertion below.
 530         leaderRaftActor.setDropMessageOfType(CaptureSnapshotReply.class);
 531
 532         // Complete the prior snapshot - this should be a no-op b/c it's no longer the leader
 533         leaderActor.tell(commitMsg, leaderActor);
 534
 535         leaderActor.tell(new RaftActorServerConfigurationSupport.ServerOperationTimeout(NEW_SERVER_ID), leaderActor);
 536
 537         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 538         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 539
 540         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 541         assertEquals("isCapturing", false, leaderActorContext.getSnapshotManager().isCapturing());
 542
 543         LOG.info("testAddServerWithLeaderChangeBeforePriorSnapshotComplete ending");
 544     }
 545
 546     @Test
 547     public void testAddServerWithLeaderChangeDuringInstallSnapshot() throws Exception {
 548         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot starting");
 549
 550         setupNewFollower();
 551         RaftActorContext initialActorContext = new MockRaftActorContext();
 552
 553         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 554                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 555                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 556                 actorFactory.generateActorId(LEADER_ID));
 557
 558         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 559         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 560
 561         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(8);
 562
 563         TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 564
 565         // Drop the UnInitializedFollowerSnapshotReply to delay it.
 566         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 567
 568         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 569
 570         final UnInitializedFollowerSnapshotReply snapshotReply = expectFirstMatching(leaderCollectorActor,
 571                 UnInitializedFollowerSnapshotReply.class);
 572
 573         // Prevent election timeout when the leader switches to follower
 574         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(100);
 575
 576         // Change the leader behavior to follower
 577         leaderActor.tell(new Follower(leaderActorContext), leaderActor);
 578
 579         // Send the captured UnInitializedFollowerSnapshotReply - should be a no-op
 580         leaderRaftActor.setDropMessageOfType(null);
 581         leaderActor.tell(snapshotReply, leaderActor);
 582
 583         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 584         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 585
 586         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 587
 588         LOG.info("testAddServerWithLeaderChangeDuringInstallSnapshot ending");
 589     }
 590
 591     @Test
 592     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 593         LOG.info("testAddServerWithInstallSnapshotTimeout starting");
 594
 595         setupNewFollower();
 596         RaftActorContext initialActorContext = new MockRaftActorContext();
 597
 598         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 599                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 600                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 601                 actorFactory.generateActorId(LEADER_ID));
 602
 603         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 604         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 605         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 606
 607         // Drop the InstallSnapshot message so it times out
 608         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.class);
 609
 610         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 611
 612         leaderActor.tell(new UnInitializedFollowerSnapshotReply("bogus"), leaderActor);
 613
 614         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 615         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 616
 617         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 618         assertEquals("Leader followers size", 0,
 619                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 620
 621         LOG.info("testAddServerWithInstallSnapshotTimeout ending");
 622     }
 623
 624     @Test
 625     public void testAddServerWithNoLeader() {
 626         LOG.info("testAddServerWithNoLeader starting");
 627
 628         setupNewFollower();
 629         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 630         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 631
 632         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 633                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 634                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 635                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 636                 actorFactory.generateActorId(LEADER_ID));
 637         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 638
 639         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 640                 testKit.getRef());
 641         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 642         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 643
 644         LOG.info("testAddServerWithNoLeader ending");
 645     }
 646
 647     @Test
 648     public void testAddServerWithNoConsensusReached() {
 649         LOG.info("testAddServerWithNoConsensusReached starting");
 650
 651         setupNewFollower();
 652         RaftActorContext initialActorContext = new MockRaftActorContext();
 653
 654         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 655                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 656                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 657                 actorFactory.generateActorId(LEADER_ID));
 658
 659         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 660         final RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 661
 662         final TestActorRef<MessageCollectorActor> leaderCollectorActor = newLeaderCollectorActor(leaderRaftActor);
 663
 664         // Drop UnInitializedFollowerSnapshotReply initially
 665         leaderRaftActor.setDropMessageOfType(UnInitializedFollowerSnapshotReply.class);
 666
 667         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 668         newFollowerCollectorActor = newCollectorActor(newFollowerRaftActorInstance, NEW_SERVER_ID);
 669
 670         // Drop AppendEntries to the new follower so consensus isn't reached
 671         newFollowerRaftActorInstance.setDropMessageOfType(AppendEntries.class);
 672
 673         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 674
 675         // Capture the UnInitializedFollowerSnapshotReply
 676         Object snapshotReply = expectFirstMatching(leaderCollectorActor, UnInitializedFollowerSnapshotReply.class);
 677
 678         // Send the UnInitializedFollowerSnapshotReply to resume the first request
 679         leaderRaftActor.setDropMessageOfType(null);
 680         leaderActor.tell(snapshotReply, leaderActor);
 681
 682         expectFirstMatching(newFollowerCollectorActor, AppendEntries.class);
 683
 684         // Send a second AddServer
 685         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 686
 687         // The first AddServer should succeed with OK even though consensus wasn't reached
 688         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 689         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 690         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint().get());
 691
 692         // Verify ServerConfigurationPayload entry in leader's log
 693         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 694                 votingServer(NEW_SERVER_ID));
 695
 696         // The second AddServer should fail since consensus wasn't reached for the first
 697         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 698         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 699
 700         // Re-send the second AddServer - should also fail
 701         leaderActor.tell(new AddServer(NEW_SERVER_ID2, "", false), testKit.getRef());
 702         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 703         assertEquals("getStatus", ServerChangeStatus.PRIOR_REQUEST_CONSENSUS_TIMEOUT, addServerReply.getStatus());
 704
 705         LOG.info("testAddServerWithNoConsensusReached ending");
 706     }
 707
 708     @Test
 709     public void testAddServerWithExistingServer() {
 710         LOG.info("testAddServerWithExistingServer starting");
 711
 712         RaftActorContext initialActorContext = new MockRaftActorContext();
 713
 714         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 715                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 716                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 717                 actorFactory.generateActorId(LEADER_ID));
 718
 719         leaderActor.tell(new AddServer(FOLLOWER_ID, followerActor.path().toString(), true), testKit.getRef());
 720
 721         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 722         assertEquals("getStatus", ServerChangeStatus.ALREADY_EXISTS, addServerReply.getStatus());
 723
 724         LOG.info("testAddServerWithExistingServer ending");
 725     }
 726
 727     @Test
 728     public void testAddServerForwardedToLeader() {
 729         LOG.info("testAddServerForwardedToLeader starting");
 730
 731         setupNewFollower();
 732         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 733         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 734
 735         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 736                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 737                 actorFactory.generateActorId(LEADER_ID));
 738
 739         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 740                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 741                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 742                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 743                 actorFactory.generateActorId(FOLLOWER_ID));
 744         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 745
 746         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 747                 -1, -1, (short)0), leaderActor);
 748
 749         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true),
 750                 testKit.getRef());
 751         expectFirstMatching(leaderActor, AddServer.class);
 752
 753         LOG.info("testAddServerForwardedToLeader ending");
 754     }
 755
 756     @Test
 757     public void testOnApplyState() {
 758         LOG.info("testOnApplyState starting");
 759
 760         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 761         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 762         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 763                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 764                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 765                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 766                 actorFactory.generateActorId(LEADER_ID));
 767
 768         RaftActorServerConfigurationSupport support = new RaftActorServerConfigurationSupport(
 769                 noLeaderActor.underlyingActor());
 770
 771         ReplicatedLogEntry serverConfigEntry = new SimpleReplicatedLogEntry(1, 1,
 772                 new ServerConfigurationPayload(Collections.<ServerInfo>emptyList()));
 773         boolean handled = support.handleMessage(new ApplyState(null, null, serverConfigEntry), ActorRef.noSender());
 774         assertEquals("Message handled", true, handled);
 775
 776         ReplicatedLogEntry nonServerConfigEntry = new SimpleReplicatedLogEntry(1, 1,
 777                 new MockRaftActorContext.MockPayload("1"));
 778         handled = support.handleMessage(new ApplyState(null, null, nonServerConfigEntry), ActorRef.noSender());
 779         assertEquals("Message handled", false, handled);
 780
 781         LOG.info("testOnApplyState ending");
 782     }
 783
 784     @Test
 785     public void testRemoveServerWithNoLeader() {
 786         LOG.info("testRemoveServerWithNoLeader starting");
 787
 788         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 789         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 790
 791         TestActorRef<MockRaftActor> leaderActor = actorFactory.createTestActor(
 792                 MockRaftActor.builder().id(LEADER_ID).peerAddresses(ImmutableMap.of(FOLLOWER_ID,
 793                         followerActor.path().toString())).config(configParams).persistent(Optional.of(false))
 794                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 795                 actorFactory.generateActorId(LEADER_ID));
 796         leaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 797
 798         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 799         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 800                 RemoveServerReply.class);
 801         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, removeServerReply.getStatus());
 802
 803         LOG.info("testRemoveServerWithNoLeader ending");
 804     }
 805
 806     @Test
 807     public void testRemoveServerNonExistentServer() {
 808         LOG.info("testRemoveServerNonExistentServer starting");
 809
 810         RaftActorContext initialActorContext = new MockRaftActorContext();
 811
 812         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 813                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 814                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 815                 actorFactory.generateActorId(LEADER_ID));
 816
 817         leaderActor.tell(new RemoveServer(NEW_SERVER_ID), testKit.getRef());
 818         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 819                 RemoveServerReply.class);
 820         assertEquals("getStatus", ServerChangeStatus.DOES_NOT_EXIST, removeServerReply.getStatus());
 821
 822         LOG.info("testRemoveServerNonExistentServer ending");
 823     }
 824
 825     @Test
 826     public void testRemoveServerForwardToLeader() {
 827         LOG.info("testRemoveServerForwardToLeader starting");
 828
 829         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 830         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 831
 832         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 833                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 834                 actorFactory.generateActorId(LEADER_ID));
 835
 836         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 837                 MockRaftActor.builder().id(FOLLOWER_ID).peerAddresses(ImmutableMap.of(LEADER_ID,
 838                         leaderActor.path().toString())).config(configParams).persistent(Optional.of(false))
 839                         .props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 840                 actorFactory.generateActorId(FOLLOWER_ID));
 841         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 842
 843         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 844                 -1, -1, (short)0), leaderActor);
 845
 846         followerRaftActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 847         expectFirstMatching(leaderActor, RemoveServer.class);
 848
 849         LOG.info("testRemoveServerForwardToLeader ending");
 850     }
 851
 852     @Test
 853     public void testRemoveServer() {
 854         LOG.info("testRemoveServer starting");
 855
 856         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 857         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 858         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 859
 860         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 861         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 862         RaftActorContext initialActorContext = new MockRaftActorContext();
 863
 864         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 865                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 866                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 867                 actorFactory.generateActorId(LEADER_ID));
 868
 869         final TestActorRef<MessageCollectorActor> leaderCollector =
 870                 newLeaderCollectorActor(leaderActor.underlyingActor());
 871
 872         TestActorRef<MessageCollectorActor> collector = actorFactory.createTestActor(MessageCollectorActor.props()
 873                 .withDispatcher(Dispatchers.DefaultDispatcherId()),
 874                         actorFactory.generateActorId("collector"));
 875         actorFactory.createTestActor(
 876                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 877                         configParams, NO_PERSISTENCE, collector).withDispatcher(Dispatchers.DefaultDispatcherId()),
 878                 followerActorId);
 879
 880         leaderActor.tell(new RemoveServer(FOLLOWER_ID), testKit.getRef());
 881         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 882                 RemoveServerReply.class);
 883         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 884
 885         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
 886         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 887         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 888                 votingServer(LEADER_ID));
 889
 890         RaftActorBehavior currentBehavior = leaderActor.underlyingActor().getCurrentBehavior();
 891         assertTrue("Expected Leader", currentBehavior instanceof Leader);
 892         assertEquals("Follower ids size", 0, ((Leader)currentBehavior).getFollowerIds().size());
 893
 894         MessageCollectorActor.expectFirstMatching(collector, ServerRemoved.class);
 895
 896         LOG.info("testRemoveServer ending");
 897     }
 898
 899     @Test
 900     public void testRemoveServerLeader() {
 901         LOG.info("testRemoveServerLeader starting");
 902
 903         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 904         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 905         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 906
 907         final String followerActorId = actorFactory.generateActorId(FOLLOWER_ID);
 908         final String followerActorPath = actorFactory.createTestActorPath(followerActorId);
 909         RaftActorContext initialActorContext = new MockRaftActorContext();
 910
 911         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 912                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActorPath),
 913                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 914                 actorFactory.generateActorId(LEADER_ID));
 915
 916         final TestActorRef<MessageCollectorActor> leaderCollector =
 917                 newLeaderCollectorActor(leaderActor.underlyingActor());
 918
 919         final TestActorRef<MessageCollectorActor> followerCollector =
 920                 actorFactory.createTestActor(MessageCollectorActor.props()
 921                 .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId("collector"));
 922         actorFactory.createTestActor(
 923                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString()),
 924                         configParams, NO_PERSISTENCE, followerCollector)
 925                         .withDispatcher(Dispatchers.DefaultDispatcherId()),
 926                 followerActorId);
 927
 928         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 929         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 930                 RemoveServerReply.class);
 931         assertEquals("getStatus", ServerChangeStatus.OK, removeServerReply.getStatus());
 932
 933         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(followerCollector, ApplyState.class);
 934         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
 935         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
 936                 votingServer(FOLLOWER_ID));
 937
 938         MessageCollectorActor.expectFirstMatching(leaderCollector, ServerRemoved.class);
 939
 940         LOG.info("testRemoveServerLeader ending");
 941     }
 942
 943     @Test
 944     public void testRemoveServerLeaderWithNoFollowers() {
 945         LOG.info("testRemoveServerLeaderWithNoFollowers starting");
 946
 947         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 948                 MockLeaderRaftActor.props(Collections.<String, String>emptyMap(),
 949                         new MockRaftActorContext()).withDispatcher(Dispatchers.DefaultDispatcherId()),
 950                 actorFactory.generateActorId(LEADER_ID));
 951
 952         leaderActor.tell(new RemoveServer(LEADER_ID), testKit.getRef());
 953         RemoveServerReply removeServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"),
 954                 RemoveServerReply.class);
 955         assertEquals("getStatus", ServerChangeStatus.NOT_SUPPORTED, removeServerReply.getStatus());
 956
 957         LOG.info("testRemoveServerLeaderWithNoFollowers ending");
 958     }
 959
 960     @Test
 961     public void testChangeServersVotingStatus() {
 962         LOG.info("testChangeServersVotingStatus starting");
 963
 964         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 965         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 966         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 967
 968         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
 969         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
 970         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
 971         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
 972
 973         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 974                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
 975                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
 976                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
 977         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
 978
 979         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
 980                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 981                 actorFactory.generateActorId("collector"));
 982         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
 983                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 984                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
 985                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
 986
 987         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
 988                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 989                 actorFactory.generateActorId("collector"));
 990         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
 991                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
 992                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
 993                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
 994
 995         // Send first ChangeServersVotingStatus message
 996
 997         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, false, FOLLOWER_ID2, false)),
 998                 testKit.getRef());
 999         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1000         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1001
1002         final ApplyState applyState = MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1003         assertEquals(0L, applyState.getReplicatedLogEntry().getIndex());
1004         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1005                 votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1006
1007         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1008         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1009                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1010                 nonVotingServer(FOLLOWER_ID2));
1011
1012         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1013         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1014                 .getReplicatedLog(), votingServer(LEADER_ID), nonVotingServer(FOLLOWER_ID),
1015                 nonVotingServer(FOLLOWER_ID2));
1016
1017         MessageCollectorActor.clearMessages(leaderCollector);
1018         MessageCollectorActor.clearMessages(follower1Collector);
1019         MessageCollectorActor.clearMessages(follower2Collector);
1020
1021         // Send second ChangeServersVotingStatus message
1022
1023         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(FOLLOWER_ID, true)), testKit.getRef());
1024         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1025         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1026
1027         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1028         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1029                 votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1030
1031         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1032         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1033                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1034
1035         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1036         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1037                 .getReplicatedLog(), votingServer(LEADER_ID), votingServer(FOLLOWER_ID), nonVotingServer(FOLLOWER_ID2));
1038
1039         LOG.info("testChangeServersVotingStatus ending");
1040     }
1041
1042     @Test
1043     public void testChangeLeaderToNonVoting() {
1044         LOG.info("testChangeLeaderToNonVoting starting");
1045
1046         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1047         configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS));
1048
1049         final String follower1ActorId = actorFactory.generateActorId(FOLLOWER_ID);
1050         final String follower1ActorPath = actorFactory.createTestActorPath(follower1ActorId);
1051         final String follower2ActorId = actorFactory.generateActorId(FOLLOWER_ID2);
1052         final String follower2ActorPath = actorFactory.createTestActorPath(follower2ActorId);
1053
1054         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1055                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, follower1ActorPath,
1056                         FOLLOWER_ID2, follower2ActorPath), new MockRaftActorContext())
1057                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1058         TestActorRef<MessageCollectorActor> leaderCollector = newLeaderCollectorActor(leaderActor.underlyingActor());
1059
1060         TestActorRef<MessageCollectorActor> follower1Collector = actorFactory.createTestActor(
1061                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1062                 actorFactory.generateActorId("collector"));
1063         final TestActorRef<CollectingMockRaftActor> follower1RaftActor = actorFactory.createTestActor(
1064                 CollectingMockRaftActor.props(FOLLOWER_ID, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1065                         FOLLOWER_ID2, follower2ActorPath), configParams, NO_PERSISTENCE, follower1Collector)
1066                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower1ActorId);
1067
1068         TestActorRef<MessageCollectorActor> follower2Collector = actorFactory.createTestActor(
1069                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1070                 actorFactory.generateActorId("collector"));
1071         final TestActorRef<CollectingMockRaftActor> follower2RaftActor = actorFactory.createTestActor(
1072                 CollectingMockRaftActor.props(FOLLOWER_ID2, ImmutableMap.of(LEADER_ID, leaderActor.path().toString(),
1073                         FOLLOWER_ID, follower1ActorPath), configParams, NO_PERSISTENCE, follower2Collector)
1074                         .withDispatcher(Dispatchers.DefaultDispatcherId()), follower2ActorId);
1075
1076         // Send ChangeServersVotingStatus message
1077
1078         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1079         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1080         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1081
1082         MessageCollectorActor.expectFirstMatching(leaderCollector, ApplyState.class);
1083         verifyServerConfigurationPayloadEntry(leaderActor.underlyingActor().getRaftActorContext().getReplicatedLog(),
1084                 nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1085
1086         MessageCollectorActor.expectFirstMatching(follower1Collector, ApplyState.class);
1087         verifyServerConfigurationPayloadEntry(follower1RaftActor.underlyingActor().getRaftActorContext()
1088                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1089
1090         MessageCollectorActor.expectFirstMatching(follower2Collector, ApplyState.class);
1091         verifyServerConfigurationPayloadEntry(follower2RaftActor.underlyingActor().getRaftActorContext()
1092                 .getReplicatedLog(), nonVotingServer(LEADER_ID), votingServer(FOLLOWER_ID), votingServer(FOLLOWER_ID2));
1093
1094         verifyRaftState(RaftState.Leader, follower1RaftActor.underlyingActor(), follower2RaftActor.underlyingActor());
1095         verifyRaftState(RaftState.Follower, leaderActor.underlyingActor());
1096
1097         MessageCollectorActor.expectMatching(leaderCollector, AppendEntries.class, 2);
1098
1099         LOG.info("testChangeLeaderToNonVoting ending");
1100     }
1101
1102     @Test
1103     public void testChangeLeaderToNonVotingInSingleNode() {
1104         LOG.info("testChangeLeaderToNonVotingInSingleNode starting");
1105
1106         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
1107                 MockLeaderRaftActor.props(ImmutableMap.of(), new MockRaftActorContext())
1108                         .withDispatcher(Dispatchers.DefaultDispatcherId()), actorFactory.generateActorId(LEADER_ID));
1109
1110         leaderActor.tell(new ChangeServersVotingStatus(ImmutableMap.of(LEADER_ID, false)), testKit.getRef());
1111         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1112         assertEquals("getStatus", ServerChangeStatus.INVALID_REQUEST, reply.getStatus());
1113
1114         LOG.info("testChangeLeaderToNonVotingInSingleNode ending");
1115     }
1116
1117     @Test
1118     public void testChangeToVotingWithNoLeader() {
1119         LOG.info("testChangeToVotingWithNoLeader starting");
1120
1121         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1122         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1123         configParams.setElectionTimeoutFactor(5);
1124
1125         final String node1ID = "node1";
1126         final String node2ID = "node2";
1127
1128         // Set up a persisted ServerConfigurationPayload. Initially node1 and node2 will come up as non-voting.
1129         // via the server config. The server config will also contain 2 voting peers that are down (ie no
1130         // actors created).
1131
1132         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1133                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false),
1134                 new ServerInfo("downNode1", true), new ServerInfo("downNode2", true)));
1135         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1136
1137         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "downNode1"));
1138         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1139         InMemoryJournal.addEntry(node1ID, 3, new ApplyJournalEntries(0));
1140         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "downNode2"));
1141         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1142         InMemoryJournal.addEntry(node2ID, 3, new ApplyJournalEntries(0));
1143
1144         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1145                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1146                 actorFactory.generateActorId("collector"));
1147         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1148                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1149                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1150         CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1151
1152         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1153                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1154                 actorFactory.generateActorId("collector"));
1155         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1156                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1157                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1158         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1159
1160         node1RaftActor.waitForInitializeBehaviorComplete();
1161         node2RaftActor.waitForInitializeBehaviorComplete();
1162
1163         // Verify the intended server config was loaded and applied.
1164         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1165                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1166                 votingServer("downNode2"));
1167         assertEquals("isVotingMember", false, node1RaftActor.getRaftActorContext().isVotingMember());
1168         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1169         assertEquals("getLeaderId", null, node1RaftActor.getLeaderId());
1170
1171         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1172                 nonVotingServer(node1ID), nonVotingServer(node2ID), votingServer("downNode1"),
1173                 votingServer("downNode2"));
1174         assertEquals("isVotingMember", false, node2RaftActor.getRaftActorContext().isVotingMember());
1175
1176         // For the test, we send a ChangeServersVotingStatus message to node1 to flip the voting states for
1177         // each server, ie node1 and node2 to voting and the 2 down nodes to non-voting. This should cause
1178         // node1 to try to elect itself as leader in order to apply the new server config. Since the 2
1179         // down nodes are switched to non-voting, node1 should only need a vote from node2.
1180
1181         // First send the message such that node1 has no peer address for node2 - should fail.
1182
1183         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1184                 node2ID, true, "downNode1", false, "downNode2", false));
1185         node1RaftActorRef.tell(changeServers, testKit.getRef());
1186         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1187         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1188
1189         // Send an AppendEntries so node1 has a leaderId
1190
1191         MessageCollectorActor.clearMessages(node1Collector);
1192
1193         long term = node1RaftActor.getRaftActorContext().getTermInformation().getCurrentTerm();
1194         node1RaftActorRef.tell(new AppendEntries(term, "downNode1", -1L, -1L,
1195                 Collections.<ReplicatedLogEntry>emptyList(), 0, -1, (short)1), ActorRef.noSender());
1196
1197         // Wait for the ElectionTimeout to clear the leaderId. he leaderId must be null so on the
1198         // ChangeServersVotingStatus message, it will try to elect a leader.
1199
1200         MessageCollectorActor.expectFirstMatching(node1Collector, ElectionTimeout.class);
1201
1202         // Update node2's peer address and send the message again
1203
1204         node1RaftActor.setPeerAddress(node2ID, node2RaftActorRef.path().toString());
1205
1206         node1RaftActorRef.tell(changeServers, testKit.getRef());
1207         reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1208         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1209
1210         ApplyJournalEntries apply = MessageCollectorActor.expectFirstMatching(node1Collector,
1211                 ApplyJournalEntries.class);
1212         assertEquals("getToIndex", 1, apply.getToIndex());
1213         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1214                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1215                 nonVotingServer("downNode2"));
1216         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1217         assertEquals("getRaftState", RaftState.Leader, node1RaftActor.getRaftState());
1218
1219         apply = MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1220         assertEquals("getToIndex", 1, apply.getToIndex());
1221         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1222                 votingServer(node1ID), votingServer(node2ID), nonVotingServer("downNode1"),
1223                 nonVotingServer("downNode2"));
1224         assertEquals("isVotingMember", true, node2RaftActor.getRaftActorContext().isVotingMember());
1225         assertEquals("getRaftState", RaftState.Follower, node2RaftActor.getRaftState());
1226
1227         LOG.info("testChangeToVotingWithNoLeader ending");
1228     }
1229
1230     @Test
1231     public void testChangeToVotingWithNoLeaderAndElectionTimeout() {
1232         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout starting");
1233
1234         final String node1ID = "node1";
1235         final String node2ID = "node2";
1236
1237         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1238                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1239                         ? actorFactory.createTestActorPath(node2ID) : null;
1240
1241         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1242                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1243         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1244
1245         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1246         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1247         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1248         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1249
1250         DefaultConfigParamsImpl configParams1 = new DefaultConfigParamsImpl();
1251         configParams1.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1252         configParams1.setElectionTimeoutFactor(1);
1253         configParams1.setPeerAddressResolver(peerAddressResolver);
1254         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1255                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1256                 actorFactory.generateActorId("collector"));
1257         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1258                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams1,
1259                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1260         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1261
1262         DefaultConfigParamsImpl configParams2 = new DefaultConfigParamsImpl();
1263         configParams2.setElectionTimeoutFactor(1000000);
1264         configParams2.setPeerAddressResolver(peerAddressResolver);
1265         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1266                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1267                 actorFactory.generateActorId("collector"));
1268         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1269                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams2,
1270                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1271         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1272
1273         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1274         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1275         // RequestVote messages in node2 which should cause node1 to time out and revert back to the previous
1276         // server config and fail with NO_LEADER. Note that node1 shouldn't forward the request to node2 b/c
1277         // node2 was previously voting.
1278
1279         node2RaftActor.setDropMessageOfType(RequestVote.class);
1280
1281         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true));
1282         node1RaftActorRef.tell(changeServers, testKit.getRef());
1283         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1284         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, reply.getStatus());
1285
1286         assertEquals("Server config", Sets.newHashSet(nonVotingServer(node1ID), votingServer(node2ID)),
1287                 Sets.newHashSet(node1RaftActor.getRaftActorContext().getPeerServerInfo(true).getServerConfig()));
1288         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1289
1290         LOG.info("testChangeToVotingWithNoLeaderAndElectionTimeout ending");
1291     }
1292
1293     @Test
1294     public void testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout() {
1295         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout starting");
1296
1297         final String node1ID = "node1";
1298         final String node2ID = "node2";
1299
1300         final PeerAddressResolver peerAddressResolver = peerId -> peerId.equals(node1ID)
1301                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1302                         ? actorFactory.createTestActorPath(node2ID) : null;
1303
1304         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1305         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1306         configParams.setElectionTimeoutFactor(3);
1307         configParams.setPeerAddressResolver(peerAddressResolver);
1308
1309         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1310                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, false)));
1311         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1312
1313         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1314         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1315         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1316         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1317         InMemoryJournal.addEntry(node2ID, 3, new SimpleReplicatedLogEntry(1, 1,
1318                 new MockRaftActorContext.MockPayload("2")));
1319         InMemoryJournal.addEntry(node2ID, 4, new ApplyJournalEntries(1));
1320
1321         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1322                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1323                 actorFactory.generateActorId("collector"));
1324         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1325                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1326                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1327         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1328
1329         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1330                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1331                 actorFactory.generateActorId("collector"));
1332         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1333                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1334                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1335         final CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1336
1337         // Send a ChangeServersVotingStatus message to node1 to change mode1 to voting. This should cause
1338         // node1 to try to elect itself as leader in order to apply the new server config. However node1's log
1339         // is behind node2's so node2 should not grant node1's vote. This should cause node1 to time out and
1340         // forward the request to node2.
1341
1342         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(
1343                 ImmutableMap.of(node1ID, true, node2ID, true));
1344         node1RaftActorRef.tell(changeServers, testKit.getRef());
1345         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1346         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1347
1348         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1349         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1350                 votingServer(node1ID), votingServer(node2ID));
1351         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1352
1353         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1354         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1355                 votingServer(node1ID), votingServer(node2ID));
1356         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1357         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1358
1359         LOG.info("testChangeToVotingWithNoLeaderAndForwardedToOtherNodeAfterElectionTimeout ending");
1360     }
1361
1362     @Test
1363     public void testChangeToVotingWithNoLeaderAndOtherLeaderElected() {
1364         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected starting");
1365
1366         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1367         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1368         configParams.setElectionTimeoutFactor(100000);
1369
1370         final String node1ID = "node1";
1371         final String node2ID = "node2";
1372
1373         configParams.setPeerAddressResolver(peerId -> peerId.equals(node1ID)
1374                 ? actorFactory.createTestActorPath(node1ID) : peerId.equals(node2ID)
1375                         ? actorFactory.createTestActorPath(node2ID) : null);
1376
1377         ServerConfigurationPayload persistedServerConfig = new ServerConfigurationPayload(Arrays.asList(
1378                 new ServerInfo(node1ID, false), new ServerInfo(node2ID, true)));
1379         SimpleReplicatedLogEntry persistedServerConfigEntry = new SimpleReplicatedLogEntry(0, 1, persistedServerConfig);
1380
1381         InMemoryJournal.addEntry(node1ID, 1, new UpdateElectionTerm(1, "node1"));
1382         InMemoryJournal.addEntry(node1ID, 2, persistedServerConfigEntry);
1383         InMemoryJournal.addEntry(node2ID, 1, new UpdateElectionTerm(1, "node1"));
1384         InMemoryJournal.addEntry(node2ID, 2, persistedServerConfigEntry);
1385
1386         TestActorRef<MessageCollectorActor> node1Collector = actorFactory.createTestActor(
1387                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1388                 actorFactory.generateActorId("collector"));
1389         TestActorRef<CollectingMockRaftActor> node1RaftActorRef = actorFactory.createTestActor(
1390                 CollectingMockRaftActor.props(node1ID, ImmutableMap.<String, String>of(), configParams,
1391                         PERSISTENT, node1Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node1ID);
1392         final CollectingMockRaftActor node1RaftActor = node1RaftActorRef.underlyingActor();
1393
1394         TestActorRef<MessageCollectorActor> node2Collector = actorFactory.createTestActor(
1395                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1396                 actorFactory.generateActorId("collector"));
1397         TestActorRef<CollectingMockRaftActor> node2RaftActorRef = actorFactory.createTestActor(
1398                 CollectingMockRaftActor.props(node2ID, ImmutableMap.<String, String>of(), configParams,
1399                         PERSISTENT, node2Collector).withDispatcher(Dispatchers.DefaultDispatcherId()), node2ID);
1400         CollectingMockRaftActor node2RaftActor = node2RaftActorRef.underlyingActor();
1401
1402         // Send a ChangeServersVotingStatus message to node1 to change node1 to voting. This should cause
1403         // node1 to try to elect itself as leader in order to apply the new server config. But we'll drop
1404         // RequestVote messages in node2 and make it the leader so node1 should forward the server change
1405         // request to node2 when node2 is elected.
1406
1407         node2RaftActor.setDropMessageOfType(RequestVote.class);
1408
1409         ChangeServersVotingStatus changeServers = new ChangeServersVotingStatus(ImmutableMap.of(node1ID, true,
1410                 node2ID, true));
1411         node1RaftActorRef.tell(changeServers, testKit.getRef());
1412
1413         MessageCollectorActor.expectFirstMatching(node2Collector, RequestVote.class);
1414
1415         node2RaftActorRef.tell(TimeoutNow.INSTANCE, ActorRef.noSender());
1416
1417         ServerChangeReply reply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), ServerChangeReply.class);
1418         assertEquals("getStatus", ServerChangeStatus.OK, reply.getStatus());
1419
1420         MessageCollectorActor.expectFirstMatching(node1Collector, ApplyJournalEntries.class);
1421         verifyServerConfigurationPayloadEntry(node1RaftActor.getRaftActorContext().getReplicatedLog(),
1422                 votingServer(node1ID), votingServer(node2ID));
1423         assertEquals("isVotingMember", true, node1RaftActor.getRaftActorContext().isVotingMember());
1424         assertEquals("getRaftState", RaftState.Follower, node1RaftActor.getRaftState());
1425
1426         MessageCollectorActor.expectFirstMatching(node2Collector, ApplyJournalEntries.class);
1427         verifyServerConfigurationPayloadEntry(node2RaftActor.getRaftActorContext().getReplicatedLog(),
1428                 votingServer(node1ID), votingServer(node2ID));
1429         assertEquals("getRaftState", RaftState.Leader, node2RaftActor.getRaftState());
1430
1431         LOG.info("testChangeToVotingWithNoLeaderAndOtherLeaderElected ending");
1432     }
1433
1434     private static void verifyRaftState(RaftState expState, RaftActor... raftActors) {
1435         Stopwatch sw = Stopwatch.createStarted();
1436         while (sw.elapsed(TimeUnit.SECONDS) <= 5) {
1437             for (RaftActor raftActor : raftActors) {
1438                 if (raftActor.getRaftState() == expState) {
1439                     return;
1440                 }
1441             }
1442         }
1443
1444         fail("None of the RaftActors have state " + expState);
1445     }
1446
1447     private static ServerInfo votingServer(String id) {
1448         return new ServerInfo(id, true);
1449     }
1450
1451     private static ServerInfo nonVotingServer(String id) {
1452         return new ServerInfo(id, false);
1453     }
1454
1455     private TestActorRef<MessageCollectorActor> newLeaderCollectorActor(MockLeaderRaftActor leaderRaftActor) {
1456         return newCollectorActor(leaderRaftActor, LEADER_ID);
1457     }
1458
1459     private TestActorRef<MessageCollectorActor> newCollectorActor(AbstractMockRaftActor raftActor, String id) {
1460         TestActorRef<MessageCollectorActor> collectorActor = actorFactory.createTestActor(
1461                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
1462                 actorFactory.generateActorId(id + "Collector"));
1463         raftActor.setCollectorActor(collectorActor);
1464         return collectorActor;
1465     }
1466
1467     private static void verifyServerConfigurationPayloadEntry(ReplicatedLog log, ServerInfo... expected) {
1468         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
1469         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
1470         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
1471         assertEquals("Server config", Sets.newHashSet(expected), Sets.newHashSet(payload.getServerConfig()));
1472     }
1473
1474     private static RaftActorContextImpl newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
1475         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1476         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1477         configParams.setElectionTimeoutFactor(100000);
1478         NonPersistentDataProvider noPersistence = new NonPersistentDataProvider();
1479         ElectionTermImpl termInfo = new ElectionTermImpl(noPersistence, id, LOG);
1480         termInfo.update(1, LEADER_ID);
1481         return new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
1482                 id, termInfo, -1, -1, ImmutableMap.of(LEADER_ID, ""), configParams,
1483                 noPersistence, applyState -> actor.tell(applyState, actor), LOG);
1484     }
1485
1486     abstract static class AbstractMockRaftActor extends MockRaftActor {
1487         private volatile TestActorRef<MessageCollectorActor> collectorActor;
1488         private volatile Class<?> dropMessageOfType;
1489
1490         AbstractMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1491                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1492             super(builder().id(id).peerAddresses(peerAddresses).config(config.get())
1493                     .persistent(Optional.of(persistent)));
1494             this.collectorActor = collectorActor;
1495         }
1496
1497         void setDropMessageOfType(Class<?> dropMessageOfType) {
1498             this.dropMessageOfType = dropMessageOfType;
1499         }
1500
1501         void setCollectorActor(TestActorRef<MessageCollectorActor> collectorActor) {
1502             this.collectorActor = collectorActor;
1503         }
1504
1505         @Override
1506         public void handleCommand(Object message) {
1507             if (dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
1508                 super.handleCommand(message);
1509             }
1510
1511             if (collectorActor != null) {
1512                 collectorActor.tell(message, getSender());
1513             }
1514         }
1515     }
1516
1517     public static class CollectingMockRaftActor extends AbstractMockRaftActor {
1518
1519         CollectingMockRaftActor(String id, Map<String, String> peerAddresses, Optional<ConfigParams> config,
1520                 boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1521             super(id, peerAddresses, config, persistent, collectorActor);
1522             snapshotCohortDelegate = new RaftActorSnapshotCohort() {
1523                 @Override
1524                 public void createSnapshot(ActorRef actorRef, java.util.Optional<OutputStream> installSnapshotStream) {
1525                     actorRef.tell(new CaptureSnapshotReply(ByteState.empty(), installSnapshotStream), actorRef);
1526                 }
1527
1528                 @Override
1529                 public void applySnapshot(
1530                         org.opendaylight.controller.cluster.raft.persisted.Snapshot.State snapshotState) {
1531                 }
1532
1533                 @Override
1534                 public org.opendaylight.controller.cluster.raft.persisted.Snapshot.State deserializeSnapshot(
1535                         ByteSource snapshotBytes) {
1536                     throw new UnsupportedOperationException();
1537                 }
1538             };
1539         }
1540
1541         public static Props props(final String id, final Map<String, String> peerAddresses,
1542                 ConfigParams config, boolean persistent, TestActorRef<MessageCollectorActor> collectorActor) {
1543
1544             return Props.create(CollectingMockRaftActor.class, id, peerAddresses, Optional.of(config),
1545                     persistent, collectorActor);
1546         }
1547
1548     }
1549
1550     public static class MockLeaderRaftActor extends AbstractMockRaftActor {
1551         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
1552                 RaftActorContext fromContext) {
1553             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE, null);
1554             setPersistence(false);
1555
1556             RaftActorContext context = getRaftActorContext();
1557             for (int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
1558                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
1559                 getState().add(entry.getData());
1560                 context.getReplicatedLog().append(entry);
1561             }
1562
1563             context.setCommitIndex(fromContext.getCommitIndex());
1564             context.setLastApplied(fromContext.getLastApplied());
1565             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
1566                     fromContext.getTermInformation().getVotedFor());
1567         }
1568
1569         @Override
1570         protected void initializeBehavior() {
1571             changeCurrentBehavior(new Leader(getRaftActorContext()));
1572             initializeBehaviorComplete.countDown();
1573         }
1574
1575         @Override
1576         @SuppressWarnings("checkstyle:IllegalCatch")
1577         public void createSnapshot(ActorRef actorRef, java.util.Optional<OutputStream> installSnapshotStream) {
1578             MockSnapshotState snapshotState = new MockSnapshotState(new ArrayList<>(getState()));
1579             if (installSnapshotStream.isPresent()) {
1580                 SerializationUtils.serialize(snapshotState, installSnapshotStream.get());
1581             }
1582
1583             actorRef.tell(new CaptureSnapshotReply(snapshotState, installSnapshotStream), actorRef);
1584         }
1585
1586         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
1587             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
1588             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
1589             configParams.setElectionTimeoutFactor(10);
1590             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
1591         }
1592     }
1593
1594     public static class MockNewFollowerRaftActor extends AbstractMockRaftActor {
1595         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1596             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), NO_PERSISTENCE,
1597                     collectorActor);
1598             setPersistence(false);
1599         }
1600
1601         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
1602             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
1603         }
1604     }
1605 }