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.concurrent.TimeUnit;
  27 import org.junit.After;
  28 import org.junit.Before;
  29 import org.junit.Test;
  30 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  31 import org.opendaylight.controller.cluster.NonPersistentDataProvider;
  32 import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload.ServerInfo;
  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 static 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(), votingServer(LEADER_ID),
 153                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 154
 155         // Verify ServerConfigurationPayload entry in both followers
 156
 157         assertEquals("Follower journal last index", 3, followerActorContext.getReplicatedLog().lastIndex());
 158         verifyServerConfigurationPayloadEntry(followerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 159                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 160
 161         assertEquals("New follower journal last index", 3, newFollowerActorContext.getReplicatedLog().lastIndex());
 162         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 163                 votingServer(FOLLOWER_ID), votingServer(NEW_SERVER_ID));
 164
 165         // Verify new server config was applied in both followers
 166
 167         assertEquals("Follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID), followerActorContext.getPeerIds());
 168
 169         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, FOLLOWER_ID), newFollowerActorContext.getPeerIds());
 170
 171         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 172         expectFirstMatching(followerActor, ApplyState.class);
 173
 174         assertEquals("Follower commit index", 3, followerActorContext.getCommitIndex());
 175         assertEquals("Follower last applied index", 3, followerActorContext.getLastApplied());
 176         assertEquals("New follower commit index", 3, newFollowerActorContext.getCommitIndex());
 177         assertEquals("New follower last applied index", 3, newFollowerActorContext.getLastApplied());
 178     }
 179
 180     @Test
 181     public void testAddServerWithNoExistingFollower() throws Exception {
 182         RaftActorContext initialActorContext = new MockRaftActorContext();
 183         initialActorContext.setCommitIndex(1);
 184         initialActorContext.setLastApplied(1);
 185         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().createEntries(
 186                 0, 2, 1).build());
 187
 188         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 189                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 190                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 191                 actorFactory.generateActorId(LEADER_ID));
 192
 193         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 194         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 195
 196         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 197
 198         // Leader should install snapshot - capture and verify ApplySnapshot contents
 199
 200         ApplySnapshot applySnapshot = expectFirstMatching(newFollowerCollectorActor, ApplySnapshot.class);
 201         List<Object> snapshotState = (List<Object>) MockRaftActor.toObject(applySnapshot.getSnapshot().getState());
 202         assertEquals("Snapshot state", snapshotState, leaderRaftActor.getState());
 203
 204         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 205         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 206         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 207
 208         // Verify ServerConfigurationPayload entry in leader's log
 209
 210         assertEquals("Leader journal last index", 2, leaderActorContext.getReplicatedLog().lastIndex());
 211         assertEquals("Leader commit index", 2, leaderActorContext.getCommitIndex());
 212         assertEquals("Leader last applied index", 2, leaderActorContext.getLastApplied());
 213         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 214                 votingServer(NEW_SERVER_ID));
 215
 216         // Verify ServerConfigurationPayload entry in the new follower
 217
 218         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 219         assertEquals("New follower journal last index", 2, newFollowerActorContext.getReplicatedLog().lastIndex());
 220         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 221                 votingServer(NEW_SERVER_ID));
 222
 223         // Verify new server config was applied in the new follower
 224
 225         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 226     }
 227
 228     @Test
 229     public void testAddServersAsNonVoting() throws Exception {
 230         RaftActorContext initialActorContext = new MockRaftActorContext();
 231         initialActorContext.setCommitIndex(-1);
 232         initialActorContext.setLastApplied(-1);
 233         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 234
 235         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 236                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 237                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 238                 actorFactory.generateActorId(LEADER_ID));
 239
 240         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 241         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 242
 243         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), false), testKit.getRef());
 244
 245         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 246         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 247         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 248
 249         // Verify ServerConfigurationPayload entry in leader's log
 250
 251         assertEquals("Leader journal last index", 0, leaderActorContext.getReplicatedLog().lastIndex());
 252         assertEquals("Leader commit index", 0, leaderActorContext.getCommitIndex());
 253         assertEquals("Leader last applied index", 0, leaderActorContext.getLastApplied());
 254         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 255                 nonVotingServer(NEW_SERVER_ID));
 256
 257         // Verify ServerConfigurationPayload entry in the new follower
 258
 259         expectFirstMatching(newFollowerCollectorActor, ApplyState.class);
 260         assertEquals("New follower journal last index", 0, newFollowerActorContext.getReplicatedLog().lastIndex());
 261         verifyServerConfigurationPayloadEntry(newFollowerActorContext.getReplicatedLog(), votingServer(LEADER_ID),
 262                 nonVotingServer(NEW_SERVER_ID));
 263
 264         // Verify new server config was applied in the new follower
 265
 266         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID), newFollowerActorContext.getPeerIds());
 267
 268         MessageCollectorActor.assertNoneMatching(newFollowerCollectorActor, InstallSnapshot.class, 500);
 269
 270         // Add another non-voting server.
 271
 272         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 273         Follower newFollower2 = new Follower(follower2ActorContext);
 274         followerActor.underlyingActor().setBehavior(newFollower2);
 275
 276         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit.getRef());
 277
 278         addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 279         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 280         assertEquals("getLeaderHint", LEADER_ID, addServerReply.getLeaderHint());
 281
 282         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 283         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 284         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 285         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 286                 votingServer(LEADER_ID), nonVotingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 287     }
 288
 289     @Test
 290     public void testAddServerWithOperationInProgress() throws Exception {
 291         RaftActorContext initialActorContext = new MockRaftActorContext();
 292         initialActorContext.setCommitIndex(-1);
 293         initialActorContext.setLastApplied(-1);
 294         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 295
 296         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 297                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 298                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 299                 actorFactory.generateActorId(LEADER_ID));
 300
 301         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 302         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 303
 304         RaftActorContext follower2ActorContext = newFollowerContext(NEW_SERVER_ID2, followerActor);
 305         Follower newFollower2 = new Follower(follower2ActorContext);
 306         followerActor.underlyingActor().setBehavior(newFollower2);
 307
 308         MockNewFollowerRaftActor newFollowerRaftActorInstance = newFollowerRaftActor.underlyingActor();
 309         newFollowerRaftActorInstance.setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS);
 310
 311         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 312
 313         // Wait for leader's install snapshot and capture it
 314
 315         Object installSnapshot = expectFirstMatching(newFollowerCollectorActor, InstallSnapshot.class);
 316
 317         JavaTestKit testKit2 = new JavaTestKit(getSystem());
 318         leaderActor.tell(new AddServer(NEW_SERVER_ID2, followerActor.path().toString(), false), testKit2.getRef());
 319
 320         newFollowerRaftActorInstance.setDropMessageOfType(null);
 321         newFollowerRaftActor.tell(installSnapshot, leaderActor);
 322
 323         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 324         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 325
 326         addServerReply = testKit2.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 327         assertEquals("getStatus", ServerChangeStatus.OK, addServerReply.getStatus());
 328
 329         // Verify ServerConfigurationPayload entries in leader's log
 330
 331         assertEquals("Leader journal last index", 1, leaderActorContext.getReplicatedLog().lastIndex());
 332         assertEquals("Leader commit index", 1, leaderActorContext.getCommitIndex());
 333         assertEquals("Leader last applied index", 1, leaderActorContext.getLastApplied());
 334         verifyServerConfigurationPayloadEntry(leaderActorContext.getReplicatedLog(),
 335                 votingServer(LEADER_ID), votingServer(NEW_SERVER_ID), nonVotingServer(NEW_SERVER_ID2));
 336
 337         // Verify ServerConfigurationPayload entry in the new follower
 338
 339         MessageCollectorActor.expectMatching(newFollowerCollectorActor, ApplyState.class, 2);
 340
 341         assertEquals("New follower peers", Sets.newHashSet(LEADER_ID, NEW_SERVER_ID2),
 342                newFollowerActorContext.getPeerIds());
 343     }
 344
 345     @Test
 346     public void testAddServerWithInstallSnapshotTimeout() throws Exception {
 347         newFollowerRaftActor.underlyingActor().setDropMessageOfType(InstallSnapshot.SERIALIZABLE_CLASS);
 348
 349         RaftActorContext initialActorContext = new MockRaftActorContext();
 350         initialActorContext.setCommitIndex(-1);
 351         initialActorContext.setLastApplied(-1);
 352         initialActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 353
 354         TestActorRef<MockLeaderRaftActor> leaderActor = actorFactory.createTestActor(
 355                 MockLeaderRaftActor.props(ImmutableMap.<String, String>of(),
 356                         initialActorContext).withDispatcher(Dispatchers.DefaultDispatcherId()),
 357                 actorFactory.generateActorId(LEADER_ID));
 358
 359         MockLeaderRaftActor leaderRaftActor = leaderActor.underlyingActor();
 360         RaftActorContext leaderActorContext = leaderRaftActor.getRaftActorContext();
 361         ((DefaultConfigParamsImpl)leaderActorContext.getConfigParams()).setElectionTimeoutFactor(1);
 362
 363         leaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 364
 365         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 366         assertEquals("getStatus", ServerChangeStatus.TIMEOUT, addServerReply.getStatus());
 367
 368         assertEquals("Leader peers size", 0, leaderActorContext.getPeerIds().size());
 369         assertEquals("Leader followers size", 0,
 370                 ((AbstractLeader)leaderRaftActor.getCurrentBehavior()).getFollowerIds().size());
 371     }
 372
 373     @Test
 374     public void testAddServerWithNoLeader() {
 375         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 376         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 377
 378         TestActorRef<MockRaftActor> noLeaderActor = actorFactory.createTestActor(
 379                 MockRaftActor.props(LEADER_ID, ImmutableMap.<String,String>of(FOLLOWER_ID, followerActor.path().toString()),
 380                         Optional.<ConfigParams>of(configParams), NO_PERSISTENCE).withDispatcher(Dispatchers.DefaultDispatcherId()),
 381                 actorFactory.generateActorId(LEADER_ID));
 382         noLeaderActor.underlyingActor().waitForInitializeBehaviorComplete();
 383
 384         noLeaderActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 385         AddServerReply addServerReply = testKit.expectMsgClass(JavaTestKit.duration("5 seconds"), AddServerReply.class);
 386         assertEquals("getStatus", ServerChangeStatus.NO_LEADER, addServerReply.getStatus());
 387     }
 388
 389     @Test
 390     public void testAddServerForwardedToLeader() {
 391         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 392         configParams.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS));
 393
 394         TestActorRef<MessageCollectorActor> leaderActor = actorFactory.createTestActor(
 395                 MessageCollectorActor.props().withDispatcher(Dispatchers.DefaultDispatcherId()),
 396                 actorFactory.generateActorId(LEADER_ID));
 397
 398         TestActorRef<MockRaftActor> followerRaftActor = actorFactory.createTestActor(
 399                 MockRaftActor.props(FOLLOWER_ID, ImmutableMap.<String,String>of(LEADER_ID, leaderActor.path().toString()),
 400                         Optional.<ConfigParams>of(configParams), NO_PERSISTENCE).withDispatcher(Dispatchers.DefaultDispatcherId()),
 401                 actorFactory.generateActorId(FOLLOWER_ID));
 402         followerRaftActor.underlyingActor().waitForInitializeBehaviorComplete();
 403
 404         followerRaftActor.tell(new AppendEntries(1, LEADER_ID, 0, 1, Collections.<ReplicatedLogEntry>emptyList(),
 405                 -1, -1, (short)0), leaderActor);
 406
 407         followerRaftActor.tell(new AddServer(NEW_SERVER_ID, newFollowerRaftActor.path().toString(), true), testKit.getRef());
 408         expectFirstMatching(leaderActor, AddServer.class);
 409     }
 410
 411     private ServerInfo votingServer(String id) {
 412         return new ServerInfo(id, true);
 413     }
 414
 415     private ServerInfo nonVotingServer(String id) {
 416         return new ServerInfo(id, false);
 417     }
 418
 419     private static void verifyServerConfigurationPayloadEntry(ReplicatedLog log, ServerInfo... expected) {
 420         ReplicatedLogEntry logEntry = log.get(log.lastIndex());
 421         assertEquals("Last log entry payload class", ServerConfigurationPayload.class, logEntry.getData().getClass());
 422         ServerConfigurationPayload payload = (ServerConfigurationPayload)logEntry.getData();
 423         assertEquals("getNewServerConfig", Sets.newHashSet(expected), Sets.newHashSet(payload.getServerConfig()));
 424     }
 425
 426     private static RaftActorContext newFollowerContext(String id, TestActorRef<? extends UntypedActor> actor) {
 427         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 428         configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 429         configParams.setElectionTimeoutFactor(100000);
 430         ElectionTermImpl termInfo = new ElectionTermImpl(NO_PERSISTENCE, id, LOG);
 431         termInfo.update(1, LEADER_ID);
 432         RaftActorContext followerActorContext = new RaftActorContextImpl(actor, actor.underlyingActor().getContext(),
 433                 id, termInfo, -1, -1,
 434                 ImmutableMap.of(LEADER_ID, ""), configParams, NO_PERSISTENCE, LOG);
 435         followerActorContext.setCommitIndex(-1);
 436         followerActorContext.setLastApplied(-1);
 437         followerActorContext.setReplicatedLog(new MockRaftActorContext.MockReplicatedLogBuilder().build());
 438
 439         return followerActorContext;
 440     }
 441
 442     public static class MockLeaderRaftActor extends MockRaftActor {
 443         public MockLeaderRaftActor(Map<String, String> peerAddresses, ConfigParams config,
 444                 RaftActorContext fromContext) {
 445             super(LEADER_ID, peerAddresses, Optional.of(config), NO_PERSISTENCE);
 446
 447             RaftActorContext context = getRaftActorContext();
 448             for(int i = 0; i < fromContext.getReplicatedLog().size(); i++) {
 449                 ReplicatedLogEntry entry = fromContext.getReplicatedLog().get(i);
 450                 getState().add(entry.getData());
 451                 context.getReplicatedLog().append(entry);
 452             }
 453
 454             context.setCommitIndex(fromContext.getCommitIndex());
 455             context.setLastApplied(fromContext.getLastApplied());
 456             context.getTermInformation().update(fromContext.getTermInformation().getCurrentTerm(),
 457                     fromContext.getTermInformation().getVotedFor());
 458         }
 459
 460         @Override
 461         protected void initializeBehavior() {
 462             changeCurrentBehavior(new Leader(getRaftActorContext()));
 463             initializeBehaviorComplete.countDown();
 464         }
 465
 466         @Override
 467         public void createSnapshot(ActorRef actorRef) {
 468             try {
 469                 actorRef.tell(new CaptureSnapshotReply(RaftActorTest.fromObject(getState()).toByteArray()), actorRef);
 470             } catch (Exception e) {
 471                 LOG.error("createSnapshot failed", e);
 472             }
 473         }
 474
 475         static Props props(Map<String, String> peerAddresses, RaftActorContext fromContext) {
 476             DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
 477             configParams.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS));
 478             configParams.setElectionTimeoutFactor(10);
 479             return Props.create(MockLeaderRaftActor.class, peerAddresses, configParams, fromContext);
 480         }
 481     }
 482
 483     public static class MockNewFollowerRaftActor extends MockRaftActor {
 484         private final TestActorRef<MessageCollectorActor> collectorActor;
 485         private volatile Class<?> dropMessageOfType;
 486
 487         public MockNewFollowerRaftActor(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
 488             super(NEW_SERVER_ID, Maps.<String, String>newHashMap(), Optional.of(config), null);
 489             this.collectorActor = collectorActor;
 490         }
 491
 492         void setDropMessageOfType(Class<?> dropMessageOfType) {
 493             this.dropMessageOfType = dropMessageOfType;
 494         }
 495
 496         @Override
 497         public void handleCommand(Object message) {
 498             if(dropMessageOfType == null || !dropMessageOfType.equals(message.getClass())) {
 499                 super.handleCommand(message);
 500             }
 501
 502             collectorActor.tell(message, getSender());
 503         }
 504
 505         static Props props(ConfigParams config, TestActorRef<MessageCollectorActor> collectorActor) {
 506             return Props.create(MockNewFollowerRaftActor.class, config, collectorActor);
 507         }
 508     }
 509 }