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.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.clearMessages;
  12 import static org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor.expectFirstMatching;
  13 import akka.actor.ActorRef;
  14 import akka.actor.Props;
  15 import akka.actor.UntypedActor;
  16 import akka.dispatch.Dispatchers;
  17 import akka.testkit.JavaTestKit;
  18 import akka.testkit.TestActorRef;
  19 import com.google.common.base.Optional;
  20 import com.google.common.collect.ImmutableMap;
  21 import com.google.common.collect.Maps;
  22 import com.google.common.collect.Sets;
  23 import java.util.Collections;
  24 import java.util.List;
  25 import java.util.Map;
  26 //import java.util.List;
  27 import java.util.concurrent.TimeUnit;
  28 import org.junit.After;
  29 import org.junit.Before;
  30 import org.junit.Test;
  31 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  32 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  33 import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
  34 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
  35 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  36 import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
  37 import org.opendaylight.controller.cluster.raft.behaviors.Follower;
  38 import org.opendaylight.controller.cluster.raft.behaviors.Leader;
  39 import org.opendaylight.controller.cluster.raft.messages.AddServer;
  40 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
  41 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
  42 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
  43 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
  44 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  45 import org.opendaylight.controller.cluster.raft.utils.ForwardMessageToBehaviorActor;
  46 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  47 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  48 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  49 import org.slf4j.Logger;
  50 import org.slf4j.LoggerFactory;
  51 import scala.concurrent.duration.FiniteDuration;
  52
  53 /**
  54  * Unit tests for RaftActorServerConfigurationSupport.
  55  *
  56  * @author Thomas Pantelis
  57  */
  58 public class RaftActorServerConfigurationSupportTest extends AbstractActorTest {
  59     static final String LEADER_ID = "leader";
  60     static final String FOLLOWER_ID = "follower";
  61     static final String NEW_SERVER_ID = "new-server";
  62     static final String NEW_SERVER_ID2 = "new-server2";
  63     private static final Logger LOG = LoggerFactory.getLogger(RaftActorServerConfigurationSupportTest.class);
  64     private static final DataPersistenceProvider NO_PERSISTENCE = new NonPersistentDataProvider();
  65
  66     private final TestActorFactory actorFactory = new TestActorFactory(getSystem());
  67
  68     private final TestActorRef<ForwardMessageToBehaviorActor> followerActor = actorFactory.createTestActor(
  69             Props.create(ForwardMessageToBehaviorActor.class).withDispatcher(Dispatchers.DefaultDispatcherId()),
  70             actorFactory.generateActorId(FOLLOWER_ID));
  71
  72     private TestActorRef<MockNewFollowerRaftActor> newFollowerRaftActor;
  73     private TestActorRef<MessageCollectorActor> newFollowerCollectorActor;
  74     private RaftActorContext newFollowerActorContext;
  75
  76     private final JavaTestKit testKit = new JavaTestKit(getSystem());
  77
  78     @Before
  79     public void setup() {
  80         InMemoryJournal.clear();
  81         InMemorySnapshotStore.clear();
  82
  83         DefaultConfigParamsImpl configParams = newFollowerConfigParams();
  84
  85         newFollowerCollectorActor = actorFactory.createTestActor(
  86                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
  87                 actorFactory.generateActorId(NEW_SERVER_ID + "Collector"));
  88         newFollowerRaftActor = actorFactory.createTestActor(MockNewFollowerRaftActor.props(
  89                 configParams, newFollowerCollectorActor).withDispatcher(Dispatchers.DefaultDispatcherId()),
  90                 actorFactory.generateActorId(NEW_SERVER_ID));
  91
  92         try {
  93             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
  94         } catch (Exception e) {
  95             newFollowerActorContext = newFollowerRaftActor.underlyingActor().getRaftActorContext();
  96         }
  97     }
  98
  99     private DefaultConfigParamsImpl newFollowerConfigParams() {
 100         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 101         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 102         configParams.setElectionTimeoutFactor(100000);
 103         configParams.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName());
 104         return configParams;
 105     }
 106
 107     @After
 108     public void tearDown() throws Exception {
 109         actorFactory.close();
 110     }
 111
 112     @Test
 113     public void testAddServerWithExistingFollower() throws Exception {
 114         RaftActorContext followerActorContext = newFollowerContext(FOLLOWER_ID, followerActor);
 115         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 116                 0, 3, 1).build());
 117         followerActorContext.setCommitIndex(2);
 118         followerActorContext.setLastApplied(2);
 119
 120         Follower follower = new Follower(followerActorContext);
 121         followerActor.underlyingActor().setBehavior(follower);
 122
 123         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 124                 MockLeaderRaftActor.props(ImmutableMap.of(FOLLOWER_ID, followerActor.path().toString()),
 125                         followerActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 126                 actorFactory.generateActorId(LEADER_ID));
 127
 128         // Expect initial heartbeat from the leader.
 129         expectFirstMatching(followerActor, AppendEntries.class);
 130         clearMessages(followerActor);
 131
 132         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 133
 134         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 135
 136         // Leader should install snapshot - capture and verify ApplySnapshot contents
 137
 138         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 139         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 140         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 141
 142         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 143         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 144         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 145
 146         // Verify ServerConfigurationPayload entry in leader's log
 147
 148         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 149         assertEquals("Leader journal last index", 3, leaderActorContext.getReplicatedLog().lastIndex());
 150         assertEquals("Leader commit index", 3, leaderActorContext.getCommitIndex());
 151         assertEquals("Leader last applied index", 3, leaderActorContext.getLastApplied());
 152         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), LEADER_ID, FOLLOWER_ID, NEW_SERVER_ID);
 153
 154         // Verify ServerConfigurationPayload entry in both followers
 155
 156         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 157         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), LEADER_ID, FOLLOWER_ID, NEW_SERVER_ID);
 158
 159         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 160         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), LEADER_ID, FOLLOWER_ID, NEW_SERVER_ID);
 161
 162         // Verify new server config was applied in both followers
 163
 164         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 165
 166         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID), newFollowerActorContext.getPeerIds());
 167
 168         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 169         expectFirstMatching(followerActor, ApplyState.class);
 170
 171         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 172         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 173         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 174         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 175     }
 176
 177     @Test
 178     public void testAddServerWithNoExistingFollower() throws Exception {
 179         RaftActorContext initialActorContext = new MockRaftActorContext();
 180         initialActorContext.setCommitIndex(1);
 181         initialActorContext.setLastApplied(1);
 182         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 183                 0, 2, 1).build());
 184
 185         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 186                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 187                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 188                 actorFactory.generateActorId(LEADER_ID));
 189
 190         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 191         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 192
 193         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 194
 195         // Leader should install snapshot - capture and verify ApplySnapshot contents
 196
 197         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 198         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 199         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 200
 201         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 202         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 203         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 204
 205         // Verify ServerConfigurationPayload entry in leader's log
 206
 207         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 208         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 209         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 210         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 211
 212         // Verify ServerConfigurationPayload entry in the new follower
 213
 214         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 215         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 216         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 217
 218         // Verify new server config was applied in the new follower
 219
 220         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 221     }
 222
 223     @Test
 224     public void testAddServersAsNonVoting() throws Exception {
 225         RaftActorContext initialActorContext = new MockRaftActorContext();
 226         initialActorContext.setCommitIndex(-1);
 227         initialActorContext.setLastApplied(-1);
 228         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 229
 230         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 231                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 232                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 233                 actorFactory.generateActorId(LEADER_ID));
 234
 235         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 236         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 237
 238         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 239
 240         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 241         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 242         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 243
 244         // Verify ServerConfigurationPayload entry in leader's log
 245
 246         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 247         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 248         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 249         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 250
 251         // Verify ServerConfigurationPayload entry in the new follower
 252
 253         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 254         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 255         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), LEADER_ID, NEW_SERVER_ID);
 256
 257         // Verify new server config was applied in the new follower
 258
 259         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 260
 261         MessageCollectorActor.assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 262
 263         // Add another non-voting server.
 264
 265         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 266         Follower newFollower2 = new Follower(follower2ActorContext);
 267         followerActor.underlyingActor().setBehavior(newFollower2);
 268
 269         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 270
 271         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 272         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 273         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 274
 275         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 276         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 277         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 278         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 279                 LEADER_ID, NEW_SERVER_ID, NEW_SERVER_ID2);
 280     }
 281
 282     @Test
 283     public void testAddServerWithOperationInProgress() throws Exception {
 284         RaftActorContext initialActorContext = new MockRaftActorContext();
 285         initialActorContext.setCommitIndex(-1);
 286         initialActorContext.setLastApplied(-1);
 287         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 288
 289         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 290                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 291                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 292                 actorFactory.generateActorId(LEADER_ID));
 293
 294         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 295         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 296
 297         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 298         Follower newFollower2 = new Follower(follower2ActorContext);
 299         followerActor.underlyingActor().setBehavior(newFollower2);
 300
 301         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 302         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS);
 303
 304         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 305
 306         // Wait for leader's install snapshot and capture it
 307
 308         Object installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 309
 310         JavaTestKit testKit2 = new JavaTestKit(getSystem());
 311         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 312
 313         newFollowerRaftActorInstance.setDropMessageOfType(null);
 314         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 315
 316         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 317         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 318
 319         addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 320         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 321
 322         // Verify ServerConfigurationPayload entries in leader's log
 323
 324         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 325         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 326         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 327         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 328                 LEADER_ID, NEW_SERVER_ID, NEW_SERVER_ID2);
 329
 330         // Verify ServerConfigurationPayload entry in the new follower
 331
 332         MessageCollectorActor.expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 333
 334         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2),
 335                newFollowerActorContext.getPeerIds());
 336     }
 337
 338     @Test
 339     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 340         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS);
 341
 342         RaftActorContext initialActorContext = new MockRaftActorContext();
 343         initialActorContext.setCommitIndex(-1);
 344         initialActorContext.setLastApplied(-1);
 345         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 346
 347         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 348                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 349                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 350                 actorFactory.generateActorId(LEADER_ID));
 351
 352         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 353         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 354         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 355
 356         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 357
 358         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 359         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 360
 361         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 362         assertEquals("Leader followers size", 0,
 363                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 364     }
 365
 366     @Test
 367     public void testAddServerWithNoLeader() {
 368         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 369         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 370
 371         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 372                 MockRaftActor.props(LEADER_ID, ImmutableMap.<String,String>of(FOLLOWER_ID, followerActor.path().toString()),
 373                         Optional.<ConfigParams>of(configParams), NO_PERSISTENCE).withDispatcher(Dispatchers.DefaultDispatcherId()),
 374                 actorFactory.generateActorId(LEADER_ID));
 375         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 376
 377         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 378         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 379         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 380     }
 381
 382     @Test
 383     public void testAddServerForwardedToLeader() {
 384         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 385         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 386
 387         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 388                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 389                 actorFactory.generateActorId(LEADER_ID));
 390
 391         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 392                 MockRaftActor.props(FOLLOWER_ID, ImmutableMap.<String,String>of(LEADER_ID, leaderActor.path().toString()),
 393                         Optional.<ConfigParams>of(configParams), NO_PERSISTENCE).withDispatcher(Dispatchers.DefaultDispatcherId()),
 394                 actorFactory.generateActorId(FOLLOWER_ID));
 395         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 396
 397         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 398                 -1, -1, (short)0), leaderActor);
 399
 400         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 401         expectFirstMatching(leaderActor, AddServer.class);
 402     }
 403
 404     private void verifyServerConfigurationPayloadEntry(ReplicatedLog log, String... cNew) {
 405         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
 406         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
 407         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
 408         assertEquals("getNewServerConfig", Sets.newHashSet(cNew), Sets.newHashSet(payload.getNewServerConfig()));
 409     }
 410
 411     private RaftActorContext newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
 412         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 413         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 414         configParams.setElectionTimeoutFactor(100000);
 415         ElectionTermImpl termInfo = new ElectionTermImpl(NO_PERSISTENCE, id, LOG);
 416         termInfo.update(1, LEADER_ID);
 417         RaftActorContext followerActorContext = new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
 418                 id, termInfo, -1, -1,
 419                 ImmutableMap.of(LEADER_ID, ""), configParams, NO_PERSISTENCE, LOG);
 420         followerActorContext.setCommitIndex(-1);
 421         followerActorContext.setLastApplied(-1);
 422         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 423
 424         return followerActorContext;
 425     }
 426
 427     public static class MockLeaderRaftActor extends MockRaftActor {
 428         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
 429                 RaftActorContext fromContext) {
 430             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE);
 431
 432             RaftActorContext context = getRaftActorContext();
 433             for(int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
 434                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
 435                 getState().add(entry.getData());
 436                 context.getReplicatedLog().append(entry);
 437             }
 438
 439             context.setCommitIndex(fromContext.getCommitIndex());
 440             context.setLastApplied(fromContext.getLastApplied());
 441             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
 442                     fromContext.getTermInformation().getVotedFor());
 443         }
 444
 445         @Override
 446         protected void initializeBehavior() {
 447             changeCurrentBehavior(new Leader(getRaftActorContext()));
 448             initializeBehaviorComplete.countDown();
 449         }
 450
 451         @Override
 452         public void createSnapshot(ActorRef actorRef) {
 453             try {
 454                 actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef);
 455             } catch (Exception e) {
 456                 LOG.error("createSnapshot failed", e);
 457             }
 458         }
 459
 460         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
 461             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 462             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 463             configParams.setElectionTimeoutFactor(10);
 464             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
 465         }
 466     }
 467
 468     public static class MockNewFollowerRaftActor extends MockRaftActor {
 469         private final TestActorRef<MessageCollectorActor> collectorActor;
 470         private volatile Class<?> dropMessageOfType;
 471
 472         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
 473             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), null);
 474             this.collectorActor = collectorActor;
 475         }
 476
 477         void setDropMessageOfType(Class<?> dropMessageOfType) {
 478             this.dropMessageOfType = dropMessageOfType;
 479         }
 480
 481         @Override
 482         public void handleCommand(Object message) {
 483             if(dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
 484                 super.handleCommand(message);
 485             }
 486
 487             collectorActor.tell(message, getSender());
 488         }
 489
 490         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
 491             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
 492         }
 493     }
 494 }