opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/ShardManagerTest.java

   1 /*
   2  * Copyright (c) 2014, 2015 Cisco 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
   9 package org.opendaylight.controller.cluster.datastore;
  10
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertNotNull;
  13 import static org.junit.Assert.assertNull;
  14 import static org.junit.Assert.assertSame;
  15 import static org.junit.Assert.assertTrue;
  16 import static org.mockito.Mockito.mock;
  17 import static org.mockito.Mockito.never;
  18 import static org.mockito.Mockito.times;
  19 import static org.mockito.Mockito.verify;
  20 import akka.actor.ActorRef;
  21 import akka.actor.ActorSystem;
  22 import akka.actor.AddressFromURIString;
  23 import akka.actor.PoisonPill;
  24 import akka.actor.Props;
  25 import akka.actor.Status;
  26 import akka.actor.Status.Failure;
  27 import akka.cluster.Cluster;
  28 import akka.cluster.ClusterEvent;
  29 import akka.dispatch.Dispatchers;
  30 import akka.japi.Creator;
  31 import akka.pattern.Patterns;
  32 import akka.persistence.RecoveryCompleted;
  33 import akka.testkit.JavaTestKit;
  34 import akka.testkit.TestActorRef;
  35 import akka.util.Timeout;
  36 import com.google.common.base.Optional;
  37 import com.google.common.collect.ImmutableMap;
  38 import com.google.common.collect.ImmutableSet;
  39 import com.google.common.collect.Sets;
  40 import com.google.common.util.concurrent.Uninterruptibles;
  41 import com.typesafe.config.ConfigFactory;
  42 import java.net.URI;
  43 import java.util.AbstractMap;
  44 import java.util.Arrays;
  45 import java.util.Collection;
  46 import java.util.Collections;
  47 import java.util.HashMap;
  48 import java.util.HashSet;
  49 import java.util.List;
  50 import java.util.Map;
  51 import java.util.Map.Entry;
  52 import java.util.Set;
  53 import java.util.concurrent.CountDownLatch;
  54 import java.util.concurrent.TimeUnit;
  55 import org.junit.After;
  56 import org.junit.Before;
  57 import org.junit.Test;
  58 import org.mockito.Mock;
  59 import org.mockito.Mockito;
  60 import org.mockito.MockitoAnnotations;
  61 import org.opendaylight.controller.cluster.datastore.config.Configuration;
  62 import org.opendaylight.controller.cluster.datastore.config.ConfigurationImpl;
  63 import org.opendaylight.controller.cluster.datastore.config.EmptyModuleShardConfigProvider;
  64 import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfiguration;
  65 import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
  66 import org.opendaylight.controller.cluster.datastore.exceptions.NotInitializedException;
  67 import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
  68 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  69 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  70 import org.opendaylight.controller.cluster.datastore.messages.ActorInitialized;
  71 import org.opendaylight.controller.cluster.datastore.messages.AddShardReplica;
  72 import org.opendaylight.controller.cluster.datastore.messages.CreateShard;
  73 import org.opendaylight.controller.cluster.datastore.messages.CreateShardReply;
  74 import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
  75 import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot.ShardSnapshot;
  76 import org.opendaylight.controller.cluster.datastore.messages.FindLocalShard;
  77 import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
  78 import org.opendaylight.controller.cluster.datastore.messages.LocalPrimaryShardFound;
  79 import org.opendaylight.controller.cluster.datastore.messages.LocalShardFound;
  80 import org.opendaylight.controller.cluster.datastore.messages.LocalShardNotFound;
  81 import org.opendaylight.controller.cluster.datastore.messages.PeerDown;
  82 import org.opendaylight.controller.cluster.datastore.messages.PeerUp;
  83 import org.opendaylight.controller.cluster.datastore.messages.PrimaryShardInfo;
  84 import org.opendaylight.controller.cluster.datastore.messages.RemotePrimaryShardFound;
  85 import org.opendaylight.controller.cluster.datastore.messages.RemoveShardReplica;
  86 import org.opendaylight.controller.cluster.datastore.messages.ShardLeaderStateChanged;
  87 import org.opendaylight.controller.cluster.datastore.messages.SwitchShardBehavior;
  88 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
  89 import org.opendaylight.controller.cluster.datastore.utils.MockClusterWrapper;
  90 import org.opendaylight.controller.cluster.datastore.utils.MockConfiguration;
  91 import org.opendaylight.controller.cluster.datastore.utils.PrimaryShardInfoFutureCache;
  92 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  93 import org.opendaylight.controller.cluster.notifications.RegisterRoleChangeListener;
  94 import org.opendaylight.controller.cluster.notifications.RoleChangeNotification;
  95 import org.opendaylight.controller.cluster.raft.RaftState;
  96 import org.opendaylight.controller.cluster.raft.base.messages.FollowerInitialSyncUpStatus;
  97 import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
  98 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshot;
  99 import org.opendaylight.controller.cluster.raft.messages.AddServer;
 100 import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
 101 import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
 102 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
 103 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
 104 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
 105 import org.opendaylight.controller.md.cluster.datastore.model.TestModel;
 106 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
 107 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 108 import scala.concurrent.Await;
 109 import scala.concurrent.Future;
 110 import scala.concurrent.duration.FiniteDuration;
 111
 112 public class ShardManagerTest extends AbstractActorTest {
 113     private static int ID_COUNTER = 1;
 114
 115     private final String shardMrgIDSuffix = "config" + ID_COUNTER++;
 116     private final String shardMgrID = "shard-manager-" + shardMrgIDSuffix;
 117
 118     @Mock
 119     private static CountDownLatch ready;
 120
 121     private static TestActorRef<MessageCollectorActor> mockShardActor;
 122
 123     private static String mockShardName;
 124
 125     private final DatastoreContext.Builder datastoreContextBuilder = DatastoreContext.newBuilder().
 126             dataStoreType(shardMrgIDSuffix).shardInitializationTimeout(600, TimeUnit.MILLISECONDS)
 127                    .shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(6);
 128
 129     private static ActorRef newMockShardActor(ActorSystem system, String shardName, String memberName) {
 130         String name = new ShardIdentifier(shardName, memberName,"config").toString();
 131         return TestActorRef.create(system, Props.create(MessageCollectorActor.class), name);
 132     }
 133
 134     private final PrimaryShardInfoFutureCache primaryShardInfoCache = new PrimaryShardInfoFutureCache();
 135
 136     @Before
 137     public void setUp() {
 138         MockitoAnnotations.initMocks(this);
 139
 140         InMemoryJournal.clear();
 141         InMemorySnapshotStore.clear();
 142
 143         if(mockShardActor == null) {
 144             mockShardName = new ShardIdentifier(Shard.DEFAULT_NAME, "member-1", "config").toString();
 145             mockShardActor = TestActorRef.create(getSystem(), Props.create(MessageCollectorActor.class), mockShardName);
 146         }
 147
 148         mockShardActor.underlyingActor().clear();
 149     }
 150
 151     @After
 152     public void tearDown() {
 153         InMemoryJournal.clear();
 154         InMemorySnapshotStore.clear();
 155     }
 156
 157     private Props newShardMgrProps() {
 158         return newShardMgrProps(new MockConfiguration());
 159     }
 160
 161     private static DatastoreContextFactory newDatastoreContextFactory(DatastoreContext datastoreContext) {
 162         DatastoreContextFactory mockFactory = mock(DatastoreContextFactory.class);
 163         Mockito.doReturn(datastoreContext).when(mockFactory).getBaseDatastoreContext();
 164         Mockito.doReturn(datastoreContext).when(mockFactory).getShardDatastoreContext(Mockito.anyString());
 165         return mockFactory;
 166     }
 167
 168     private Props newShardMgrProps(Configuration config) {
 169         return TestShardManager.builder(datastoreContextBuilder).configuration(config).props();
 170     }
 171
 172     private Props newPropsShardMgrWithMockShardActor() {
 173         return newPropsShardMgrWithMockShardActor("shardManager", mockShardActor, new MockClusterWrapper(),
 174                 new MockConfiguration());
 175     }
 176
 177     private Props newPropsShardMgrWithMockShardActor(final String name, final ActorRef shardActor,
 178             final ClusterWrapper clusterWrapper, final Configuration config) {
 179         Creator<ShardManager> creator = new Creator<ShardManager>() {
 180             private static final long serialVersionUID = 1L;
 181             @Override
 182             public ShardManager create() throws Exception {
 183                 return new ForwardingShardManager(ShardManager.builder().cluster(clusterWrapper).configuration(config).
 184                         datastoreContextFactory(newDatastoreContextFactory(datastoreContextBuilder.build())).
 185                         waitTillReadyCountdownLatch(ready).primaryShardInfoCache(primaryShardInfoCache), name, shardActor);
 186             }
 187         };
 188
 189         return Props.create(new DelegatingShardManagerCreator(creator)).withDispatcher(Dispatchers.DefaultDispatcherId());
 190     }
 191
 192     private TestShardManager newTestShardManager() {
 193         return newTestShardManager(newShardMgrProps());
 194     }
 195
 196     private TestShardManager newTestShardManager(Props props) {
 197         TestActorRef<TestShardManager> shardManagerActor = TestActorRef.create(getSystem(), props);
 198         TestShardManager shardManager = shardManagerActor.underlyingActor();
 199         shardManager.waitForRecoveryComplete();
 200         return shardManager;
 201     }
 202
 203     @Test
 204     public void testPerShardDatastoreContext() throws Exception {
 205         final DatastoreContextFactory mockFactory = newDatastoreContextFactory(
 206                 datastoreContextBuilder.shardElectionTimeoutFactor(5).build());
 207
 208         Mockito.doReturn(DatastoreContext.newBuilderFrom(datastoreContextBuilder.build()).
 209                 shardElectionTimeoutFactor(6).build()).when(mockFactory).getShardDatastoreContext("default");
 210
 211         Mockito.doReturn(DatastoreContext.newBuilderFrom(datastoreContextBuilder.build()).
 212                 shardElectionTimeoutFactor(7).build()).when(mockFactory).getShardDatastoreContext("topology");
 213
 214         final MockConfiguration mockConfig = new MockConfiguration() {
 215             @Override
 216             public Collection<String> getMemberShardNames(String memberName) {
 217                 return Arrays.asList("default", "topology");
 218             }
 219
 220             @Override
 221             public Collection<String> getMembersFromShardName(String shardName) {
 222                 return Arrays.asList("member-1");
 223             }
 224         };
 225
 226         final TestActorRef<MessageCollectorActor> defaultShardActor = TestActorRef.create(getSystem(),
 227                 Props.create(MessageCollectorActor.class), "default");
 228         final TestActorRef<MessageCollectorActor> topologyShardActor = TestActorRef.create(getSystem(),
 229                 Props.create(MessageCollectorActor.class), "topology");
 230
 231         final Map<String, Entry<ActorRef, DatastoreContext>> shardInfoMap = Collections.synchronizedMap(
 232                 new HashMap<String, Entry<ActorRef, DatastoreContext>>());
 233         shardInfoMap.put("default", new AbstractMap.SimpleEntry<ActorRef, DatastoreContext>(defaultShardActor, null));
 234         shardInfoMap.put("topology", new AbstractMap.SimpleEntry<ActorRef, DatastoreContext>(topologyShardActor, null));
 235
 236         final CountDownLatch newShardActorLatch = new CountDownLatch(2);
 237         final Creator<ShardManager> creator = new Creator<ShardManager>() {
 238             private static final long serialVersionUID = 1L;
 239             @Override
 240             public ShardManager create() throws Exception {
 241                 return new ShardManager(ShardManager.builder().cluster(new MockClusterWrapper()).configuration(mockConfig).
 242                         datastoreContextFactory(mockFactory).waitTillReadyCountdownLatch(ready).
 243                         primaryShardInfoCache(primaryShardInfoCache)) {
 244                     @Override
 245                     protected ActorRef newShardActor(SchemaContext schemaContext, ShardInformation info) {
 246                         Entry<ActorRef, DatastoreContext> entry = shardInfoMap.get(info.getShardName());
 247                         ActorRef ref = null;
 248                         if(entry != null) {
 249                             ref = entry.getKey();
 250                             entry.setValue(info.getDatastoreContext());
 251                         }
 252
 253                         newShardActorLatch.countDown();
 254                         return ref;
 255                     }
 256                 };
 257             }
 258         };
 259
 260         JavaTestKit kit = new JavaTestKit(getSystem());
 261
 262         final ActorRef shardManager = getSystem().actorOf(Props.create(new DelegatingShardManagerCreator(creator)).
 263                     withDispatcher(Dispatchers.DefaultDispatcherId()));
 264
 265         shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), kit.getRef());
 266
 267         assertEquals("Shard actors created", true, newShardActorLatch.await(5, TimeUnit.SECONDS));
 268         assertEquals("getShardElectionTimeoutFactor", 6, shardInfoMap.get("default").getValue().
 269                 getShardElectionTimeoutFactor());
 270         assertEquals("getShardElectionTimeoutFactor", 7, shardInfoMap.get("topology").getValue().
 271                 getShardElectionTimeoutFactor());
 272
 273         DatastoreContextFactory newMockFactory = newDatastoreContextFactory(
 274                 datastoreContextBuilder.shardElectionTimeoutFactor(5).build());
 275         Mockito.doReturn(DatastoreContext.newBuilderFrom(datastoreContextBuilder.build()).
 276                 shardElectionTimeoutFactor(66).build()).when(newMockFactory).getShardDatastoreContext("default");
 277
 278         Mockito.doReturn(DatastoreContext.newBuilderFrom(datastoreContextBuilder.build()).
 279                 shardElectionTimeoutFactor(77).build()).when(newMockFactory).getShardDatastoreContext("topology");
 280
 281         shardManager.tell(newMockFactory, kit.getRef());
 282
 283         DatastoreContext newContext = MessageCollectorActor.expectFirstMatching(defaultShardActor, DatastoreContext.class);
 284         assertEquals("getShardElectionTimeoutFactor", 66, newContext.getShardElectionTimeoutFactor());
 285
 286         newContext = MessageCollectorActor.expectFirstMatching(topologyShardActor, DatastoreContext.class);
 287         assertEquals("getShardElectionTimeoutFactor", 77, newContext.getShardElectionTimeoutFactor());
 288
 289         defaultShardActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 290         topologyShardActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 291     }
 292
 293     @Test
 294     public void testOnReceiveFindPrimaryForNonExistentShard() throws Exception {
 295         new JavaTestKit(getSystem()) {{
 296             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 297
 298             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 299
 300             shardManager.tell(new FindPrimary("non-existent", false), getRef());
 301
 302             expectMsgClass(duration("5 seconds"), PrimaryNotFoundException.class);
 303         }};
 304     }
 305
 306     @Test
 307     public void testOnReceiveFindPrimaryForLocalLeaderShard() throws Exception {
 308         new JavaTestKit(getSystem()) {{
 309             String memberId = "member-1-shard-default-" + shardMrgIDSuffix;
 310
 311             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 312
 313             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 314             shardManager.tell(new ActorInitialized(), mockShardActor);
 315
 316             DataTree mockDataTree = mock(DataTree.class);
 317             shardManager.tell(new ShardLeaderStateChanged(memberId, memberId, Optional.of(mockDataTree),
 318                     DataStoreVersions.CURRENT_VERSION), getRef());
 319
 320             MessageCollectorActor.expectFirstMatching(mockShardActor, RegisterRoleChangeListener.class);
 321             shardManager.tell((new RoleChangeNotification(memberId, RaftState.Candidate.name(),
 322                     RaftState.Leader.name())), mockShardActor);
 323
 324             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 325
 326             LocalPrimaryShardFound primaryFound = expectMsgClass(duration("5 seconds"), LocalPrimaryShardFound.class);
 327             assertTrue("Unexpected primary path " +  primaryFound.getPrimaryPath(),
 328                     primaryFound.getPrimaryPath().contains("member-1-shard-default"));
 329             assertSame("getLocalShardDataTree", mockDataTree, primaryFound.getLocalShardDataTree() );
 330         }};
 331     }
 332
 333     @Test
 334     public void testOnReceiveFindPrimaryForNonLocalLeaderShardBeforeMemberUp() throws Exception {
 335         new JavaTestKit(getSystem()) {{
 336             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 337
 338             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 339             shardManager.tell(new ActorInitialized(), mockShardActor);
 340
 341             String memberId2 = "member-2-shard-default-" + shardMrgIDSuffix;
 342             String memberId1 = "member-1-shard-default-" + shardMrgIDSuffix;
 343             shardManager.tell(new RoleChangeNotification(memberId1,
 344                     RaftState.Candidate.name(), RaftState.Follower.name()), mockShardActor);
 345             shardManager.tell(new LeaderStateChanged(memberId1, memberId2, DataStoreVersions.CURRENT_VERSION), mockShardActor);
 346
 347             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 348
 349             expectMsgClass(duration("5 seconds"), NoShardLeaderException.class);
 350         }};
 351     }
 352
 353     @Test
 354     public void testOnReceiveFindPrimaryForNonLocalLeaderShard() throws Exception {
 355         new JavaTestKit(getSystem()) {{
 356             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 357
 358             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 359             shardManager.tell(new ActorInitialized(), mockShardActor);
 360
 361             String memberId2 = "member-2-shard-default-" + shardMrgIDSuffix;
 362             MockClusterWrapper.sendMemberUp(shardManager, "member-2", getRef().path().toString());
 363
 364             String memberId1 = "member-1-shard-default-" + shardMrgIDSuffix;
 365             shardManager.tell(new RoleChangeNotification(memberId1,
 366                     RaftState.Candidate.name(), RaftState.Follower.name()), mockShardActor);
 367             short leaderVersion = DataStoreVersions.CURRENT_VERSION - 1;
 368             shardManager.tell(new ShardLeaderStateChanged(memberId1, memberId2, Optional.<DataTree>absent(),
 369                     leaderVersion), mockShardActor);
 370
 371             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 372
 373             RemotePrimaryShardFound primaryFound = expectMsgClass(duration("5 seconds"), RemotePrimaryShardFound.class);
 374             assertTrue("Unexpected primary path " +  primaryFound.getPrimaryPath(),
 375                     primaryFound.getPrimaryPath().contains("member-2-shard-default"));
 376             assertEquals("getPrimaryVersion", leaderVersion, primaryFound.getPrimaryVersion());
 377         }};
 378     }
 379
 380     @Test
 381     public void testOnReceiveFindPrimaryForUninitializedShard() throws Exception {
 382         new JavaTestKit(getSystem()) {{
 383             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 384
 385             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 386
 387             expectMsgClass(duration("5 seconds"), NotInitializedException.class);
 388         }};
 389     }
 390
 391     @Test
 392     public void testOnReceiveFindPrimaryForInitializedShardWithNoRole() throws Exception {
 393         new JavaTestKit(getSystem()) {{
 394             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 395
 396             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 397             shardManager.tell(new ActorInitialized(), mockShardActor);
 398
 399             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 400
 401             expectMsgClass(duration("5 seconds"), NoShardLeaderException.class);
 402         }};
 403     }
 404
 405     @Test
 406     public void testOnReceiveFindPrimaryForFollowerShardWithNoInitialLeaderId() throws Exception {
 407         new JavaTestKit(getSystem()) {{
 408             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 409
 410             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 411             shardManager.tell(new ActorInitialized(), mockShardActor);
 412
 413             String memberId = "member-1-shard-default-" + shardMrgIDSuffix;
 414             shardManager.tell(new RoleChangeNotification(memberId,
 415                     RaftState.Candidate.name(), RaftState.Follower.name()), mockShardActor);
 416
 417             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 418
 419             expectMsgClass(duration("5 seconds"), NoShardLeaderException.class);
 420
 421             DataTree mockDataTree = mock(DataTree.class);
 422             shardManager.tell(new ShardLeaderStateChanged(memberId, memberId, Optional.of(mockDataTree),
 423                     DataStoreVersions.CURRENT_VERSION), mockShardActor);
 424
 425             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, false), getRef());
 426
 427             LocalPrimaryShardFound primaryFound = expectMsgClass(duration("5 seconds"), LocalPrimaryShardFound.class);
 428             assertTrue("Unexpected primary path " +  primaryFound.getPrimaryPath(),
 429                     primaryFound.getPrimaryPath().contains("member-1-shard-default"));
 430             assertSame("getLocalShardDataTree", mockDataTree, primaryFound.getLocalShardDataTree() );
 431         }};
 432     }
 433
 434     @Test
 435     public void testOnReceiveFindPrimaryWaitForShardLeader() throws Exception {
 436         new JavaTestKit(getSystem()) {{
 437             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 438
 439             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 440
 441             // We're passing waitUntilInitialized = true to FindPrimary so the response should be
 442             // delayed until we send ActorInitialized and RoleChangeNotification.
 443             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, true), getRef());
 444
 445             expectNoMsg(FiniteDuration.create(150, TimeUnit.MILLISECONDS));
 446
 447             shardManager.tell(new ActorInitialized(), mockShardActor);
 448
 449             expectNoMsg(FiniteDuration.create(150, TimeUnit.MILLISECONDS));
 450
 451             String memberId = "member-1-shard-default-" + shardMrgIDSuffix;
 452             shardManager.tell(new RoleChangeNotification(memberId,
 453                     RaftState.Candidate.name(), RaftState.Leader.name()), mockShardActor);
 454
 455             expectNoMsg(FiniteDuration.create(150, TimeUnit.MILLISECONDS));
 456
 457             DataTree mockDataTree = mock(DataTree.class);
 458             shardManager.tell(new ShardLeaderStateChanged(memberId, memberId, Optional.of(mockDataTree),
 459                     DataStoreVersions.CURRENT_VERSION), mockShardActor);
 460
 461             LocalPrimaryShardFound primaryFound = expectMsgClass(duration("5 seconds"), LocalPrimaryShardFound.class);
 462             assertTrue("Unexpected primary path " +  primaryFound.getPrimaryPath(),
 463                     primaryFound.getPrimaryPath().contains("member-1-shard-default"));
 464             assertSame("getLocalShardDataTree", mockDataTree, primaryFound.getLocalShardDataTree() );
 465
 466             expectNoMsg(FiniteDuration.create(200, TimeUnit.MILLISECONDS));
 467         }};
 468     }
 469
 470     @Test
 471     public void testOnReceiveFindPrimaryWaitForReadyWithUninitializedShard() throws Exception {
 472         new JavaTestKit(getSystem()) {{
 473             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 474
 475             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 476
 477             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, true), getRef());
 478
 479             expectMsgClass(duration("2 seconds"), NotInitializedException.class);
 480
 481             shardManager.tell(new ActorInitialized(), mockShardActor);
 482
 483             expectNoMsg(FiniteDuration.create(200, TimeUnit.MILLISECONDS));
 484         }};
 485     }
 486
 487     @Test
 488     public void testOnReceiveFindPrimaryWaitForReadyWithCandidateShard() throws Exception {
 489         new JavaTestKit(getSystem()) {{
 490             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 491
 492             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 493             shardManager.tell(new ActorInitialized(), mockShardActor);
 494             shardManager.tell(new RoleChangeNotification("member-1-shard-default-" + shardMrgIDSuffix,
 495                     null, RaftState.Candidate.name()), mockShardActor);
 496
 497             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, true), getRef());
 498
 499             expectMsgClass(duration("2 seconds"), NoShardLeaderException.class);
 500         }};
 501     }
 502
 503     @Test
 504     public void testOnReceiveFindPrimaryWaitForReadyWithIsolatedLeaderShard() throws Exception {
 505         new JavaTestKit(getSystem()) {{
 506             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 507
 508             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 509             shardManager.tell(new ActorInitialized(), mockShardActor);
 510             shardManager.tell(new RoleChangeNotification("member-1-shard-default-" + shardMrgIDSuffix,
 511                     null, RaftState.IsolatedLeader.name()), mockShardActor);
 512
 513             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, true), getRef());
 514
 515             expectMsgClass(duration("2 seconds"), NoShardLeaderException.class);
 516         }};
 517     }
 518
 519     @Test
 520     public void testOnReceiveFindPrimaryWaitForReadyWithNoRoleShard() throws Exception {
 521         new JavaTestKit(getSystem()) {{
 522             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 523
 524             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 525             shardManager.tell(new ActorInitialized(), mockShardActor);
 526
 527             shardManager.tell(new FindPrimary(Shard.DEFAULT_NAME, true), getRef());
 528
 529             expectMsgClass(duration("2 seconds"), NoShardLeaderException.class);
 530         }};
 531     }
 532
 533     @Test
 534     public void testOnReceiveFindPrimaryForRemoteShard() throws Exception {
 535         String shardManagerID = ShardManagerIdentifier.builder().type(shardMrgIDSuffix).build().toString();
 536
 537         // Create an ActorSystem ShardManager actor for member-1.
 538
 539         final ActorSystem system1 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 540         Cluster.get(system1).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 541
 542         ActorRef mockShardActor1 = newMockShardActor(system1, Shard.DEFAULT_NAME, "member-1");
 543
 544         final TestActorRef<ForwardingShardManager> shardManager1 = TestActorRef.create(system1,
 545                 newPropsShardMgrWithMockShardActor("shardManager1", mockShardActor1, new ClusterWrapperImpl(system1),
 546                         new MockConfiguration()), shardManagerID);
 547
 548         // Create an ActorSystem ShardManager actor for member-2.
 549
 550         final ActorSystem system2 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member2"));
 551
 552         Cluster.get(system2).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 553
 554         final ActorRef mockShardActor2 = newMockShardActor(system2, "astronauts", "member-2");
 555
 556         MockConfiguration mockConfig2 = new MockConfiguration(ImmutableMap.<String, List<String>>builder().
 557                 put("default", Arrays.asList("member-1", "member-2")).
 558                 put("astronauts", Arrays.asList("member-2")).build());
 559
 560         final TestActorRef<ForwardingShardManager> shardManager2 = TestActorRef.create(system2,
 561                 newPropsShardMgrWithMockShardActor("shardManager2", mockShardActor2, new ClusterWrapperImpl(system2),
 562                         mockConfig2), shardManagerID);
 563
 564         new JavaTestKit(system1) {{
 565
 566             shardManager1.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 567             shardManager2.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 568
 569             shardManager2.tell(new ActorInitialized(), mockShardActor2);
 570
 571             String memberId2 = "member-2-shard-astronauts-" + shardMrgIDSuffix;
 572             short leaderVersion = DataStoreVersions.CURRENT_VERSION - 1;
 573             shardManager2.tell(new ShardLeaderStateChanged(memberId2, memberId2,
 574                     Optional.of(mock(DataTree.class)), leaderVersion), mockShardActor2);
 575             shardManager2.tell(new RoleChangeNotification(memberId2,
 576                     RaftState.Candidate.name(), RaftState.Leader.name()), mockShardActor2);
 577
 578             shardManager1.underlyingActor().waitForMemberUp();
 579
 580             shardManager1.tell(new FindPrimary("astronauts", false), getRef());
 581
 582             RemotePrimaryShardFound found = expectMsgClass(duration("5 seconds"), RemotePrimaryShardFound.class);
 583             String path = found.getPrimaryPath();
 584             assertTrue("Unexpected primary path " + path, path.contains("member-2-shard-astronauts-config"));
 585             assertEquals("getPrimaryVersion", leaderVersion, found.getPrimaryVersion());
 586
 587             shardManager2.underlyingActor().verifyFindPrimary();
 588
 589             Cluster.get(system2).down(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 590
 591             shardManager1.underlyingActor().waitForMemberRemoved();
 592
 593             shardManager1.tell(new FindPrimary("astronauts", false), getRef());
 594
 595             expectMsgClass(duration("5 seconds"), PrimaryNotFoundException.class);
 596         }};
 597
 598         JavaTestKit.shutdownActorSystem(system1);
 599         JavaTestKit.shutdownActorSystem(system2);
 600     }
 601
 602     @Test
 603     public void testShardAvailabilityOnChangeOfMemberReachability() throws Exception {
 604         String shardManagerID = ShardManagerIdentifier.builder().type(shardMrgIDSuffix).build().toString();
 605
 606         // Create an ActorSystem ShardManager actor for member-1.
 607
 608         final ActorSystem system1 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 609         Cluster.get(system1).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 610
 611         final ActorRef mockShardActor1 = newMockShardActor(system1, Shard.DEFAULT_NAME, "member-1");
 612
 613         final TestActorRef<ForwardingShardManager> shardManager1 = TestActorRef.create(system1,
 614             newPropsShardMgrWithMockShardActor("shardManager1", mockShardActor1, new ClusterWrapperImpl(system1),
 615                 new MockConfiguration()), shardManagerID);
 616
 617         // Create an ActorSystem ShardManager actor for member-2.
 618
 619         final ActorSystem system2 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member2"));
 620
 621         Cluster.get(system2).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 622
 623         final ActorRef mockShardActor2 = newMockShardActor(system2, Shard.DEFAULT_NAME, "member-2");
 624
 625         MockConfiguration mockConfig2 = new MockConfiguration(ImmutableMap.<String, List<String>>builder().
 626             put("default", Arrays.asList("member-1", "member-2")).build());
 627
 628         final TestActorRef<ForwardingShardManager> shardManager2 = TestActorRef.create(system2,
 629             newPropsShardMgrWithMockShardActor("shardManager2", mockShardActor2, new ClusterWrapperImpl(system2),
 630                 mockConfig2), shardManagerID);
 631
 632         new JavaTestKit(system1) {{
 633
 634             shardManager1.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 635             shardManager2.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 636             shardManager1.tell(new ActorInitialized(), mockShardActor1);
 637             shardManager2.tell(new ActorInitialized(), mockShardActor2);
 638
 639             String memberId2 = "member-2-shard-default-" + shardMrgIDSuffix;
 640             String memberId1 = "member-1-shard-default-" + shardMrgIDSuffix;
 641             shardManager1.tell(new ShardLeaderStateChanged(memberId1, memberId2,
 642                 Optional.of(mock(DataTree.class)), DataStoreVersions.CURRENT_VERSION), mockShardActor1);
 643             shardManager1.tell(new RoleChangeNotification(memberId1,
 644                 RaftState.Candidate.name(), RaftState.Follower.name()), mockShardActor1);
 645             shardManager2.tell(new ShardLeaderStateChanged(memberId2, memberId2, Optional.of(mock(DataTree.class)),
 646                     DataStoreVersions.CURRENT_VERSION),
 647                 mockShardActor2);
 648             shardManager2.tell(new RoleChangeNotification(memberId2,
 649                 RaftState.Candidate.name(), RaftState.Leader.name()), mockShardActor2);
 650             shardManager1.underlyingActor().waitForMemberUp();
 651
 652             shardManager1.tell(new FindPrimary("default", true), getRef());
 653
 654             RemotePrimaryShardFound found = expectMsgClass(duration("5 seconds"), RemotePrimaryShardFound.class);
 655             String path = found.getPrimaryPath();
 656             assertTrue("Unexpected primary path " + path, path.contains("member-2-shard-default-config"));
 657
 658             shardManager1.underlyingActor().onReceiveCommand(MockClusterWrapper.
 659                 createUnreachableMember("member-2", "akka.tcp://cluster-test@127.0.0.1:2558"));
 660
 661             shardManager1.underlyingActor().waitForUnreachableMember();
 662
 663             PeerDown peerDown = MessageCollectorActor.expectFirstMatching(mockShardActor1, PeerDown.class);
 664             assertEquals("getMemberName", "member-2", peerDown.getMemberName());
 665             MessageCollectorActor.clearMessages(mockShardActor1);
 666
 667             shardManager1.underlyingActor().onReceiveCommand(MockClusterWrapper.
 668                     createMemberRemoved("member-2", "akka.tcp://cluster-test@127.0.0.1:2558"));
 669
 670             MessageCollectorActor.expectFirstMatching(mockShardActor1, PeerDown.class);
 671
 672             shardManager1.tell(new FindPrimary("default", true), getRef());
 673
 674             expectMsgClass(duration("5 seconds"), NoShardLeaderException.class);
 675
 676             shardManager1.underlyingActor().onReceiveCommand(MockClusterWrapper.
 677                 createReachableMember("member-2", "akka.tcp://cluster-test@127.0.0.1:2558"));
 678
 679             shardManager1.underlyingActor().waitForReachableMember();
 680
 681             PeerUp peerUp = MessageCollectorActor.expectFirstMatching(mockShardActor1, PeerUp.class);
 682             assertEquals("getMemberName", "member-2", peerUp.getMemberName());
 683             MessageCollectorActor.clearMessages(mockShardActor1);
 684
 685             shardManager1.tell(new FindPrimary("default", true), getRef());
 686
 687             RemotePrimaryShardFound found1 = expectMsgClass(duration("5 seconds"), RemotePrimaryShardFound.class);
 688             String path1 = found1.getPrimaryPath();
 689             assertTrue("Unexpected primary path " + path1, path1.contains("member-2-shard-default-config"));
 690
 691             shardManager1.underlyingActor().onReceiveCommand(MockClusterWrapper.
 692                     createMemberUp("member-2", "akka.tcp://cluster-test@127.0.0.1:2558"));
 693
 694             MessageCollectorActor.expectFirstMatching(mockShardActor1, PeerUp.class);
 695
 696         }};
 697
 698         JavaTestKit.shutdownActorSystem(system1);
 699         JavaTestKit.shutdownActorSystem(system2);
 700     }
 701
 702     @Test
 703     public void testShardAvailabilityChangeOnMemberUnreachableAndLeadershipChange() throws Exception {
 704         String shardManagerID = ShardManagerIdentifier.builder().type(shardMrgIDSuffix).build().toString();
 705
 706         // Create an ActorSystem ShardManager actor for member-1.
 707
 708         final ActorSystem system1 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 709         Cluster.get(system1).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 710
 711         final ActorRef mockShardActor1 = newMockShardActor(system1, Shard.DEFAULT_NAME, "member-1");
 712
 713         final TestActorRef<ForwardingShardManager> shardManager1 = TestActorRef.create(system1,
 714             newPropsShardMgrWithMockShardActor("shardManager1", mockShardActor1, new ClusterWrapperImpl(system1),
 715                 new MockConfiguration()), shardManagerID);
 716
 717         // Create an ActorSystem ShardManager actor for member-2.
 718
 719         final ActorSystem system2 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member2"));
 720
 721         Cluster.get(system2).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
 722
 723         final ActorRef mockShardActor2 = newMockShardActor(system2, Shard.DEFAULT_NAME, "member-2");
 724
 725         MockConfiguration mockConfig2 = new MockConfiguration(ImmutableMap.<String, List<String>>builder().
 726             put("default", Arrays.asList("member-1", "member-2")).build());
 727
 728         final TestActorRef<ForwardingShardManager> shardManager2 = TestActorRef.create(system2,
 729             newPropsShardMgrWithMockShardActor("shardManager2", mockShardActor2, new ClusterWrapperImpl(system2),
 730                 mockConfig2), shardManagerID);
 731
 732         new JavaTestKit(system1) {{
 733
 734             shardManager1.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 735             shardManager2.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 736             shardManager1.tell(new ActorInitialized(), mockShardActor1);
 737             shardManager2.tell(new ActorInitialized(), mockShardActor2);
 738
 739             String memberId2 = "member-2-shard-default-" + shardMrgIDSuffix;
 740             String memberId1 = "member-1-shard-default-" + shardMrgIDSuffix;
 741             shardManager1.tell(new ShardLeaderStateChanged(memberId1, memberId2,
 742                 Optional.of(mock(DataTree.class)), DataStoreVersions.CURRENT_VERSION), mockShardActor1);
 743             shardManager1.tell(new RoleChangeNotification(memberId1,
 744                 RaftState.Candidate.name(), RaftState.Follower.name()), mockShardActor1);
 745             shardManager2.tell(new ShardLeaderStateChanged(memberId2, memberId2, Optional.of(mock(DataTree.class)),
 746                     DataStoreVersions.CURRENT_VERSION),
 747                 mockShardActor2);
 748             shardManager2.tell(new RoleChangeNotification(memberId2,
 749                 RaftState.Candidate.name(), RaftState.Leader.name()), mockShardActor2);
 750             shardManager1.underlyingActor().waitForMemberUp();
 751
 752             shardManager1.tell(new FindPrimary("default", true), getRef());
 753
 754             RemotePrimaryShardFound found = expectMsgClass(duration("5 seconds"), RemotePrimaryShardFound.class);
 755             String path = found.getPrimaryPath();
 756             assertTrue("Unexpected primary path " + path, path.contains("member-2-shard-default-config"));
 757
 758             primaryShardInfoCache.putSuccessful("default", new PrimaryShardInfo(system1.actorSelection(
 759                     mockShardActor1.path()), DataStoreVersions.CURRENT_VERSION, Optional.<DataTree>absent()));
 760
 761             shardManager1.underlyingActor().onReceiveCommand(MockClusterWrapper.
 762                 createUnreachableMember("member-2", "akka.tcp://cluster-test@127.0.0.1:2558"));
 763
 764             shardManager1.underlyingActor().waitForUnreachableMember();
 765
 766             shardManager1.tell(new FindPrimary("default", true), getRef());
 767
 768             expectMsgClass(duration("5 seconds"), NoShardLeaderException.class);
 769
 770             assertNull("Expected primaryShardInfoCache entry removed", primaryShardInfoCache.getIfPresent("default"));
 771
 772             shardManager1.tell(new ShardLeaderStateChanged(memberId1, memberId1, Optional.of(mock(DataTree.class)),
 773                     DataStoreVersions.CURRENT_VERSION), mockShardActor1);
 774             shardManager1.tell(new RoleChangeNotification(memberId1,
 775                 RaftState.Follower.name(), RaftState.Leader.name()), mockShardActor1);
 776
 777             shardManager1.tell(new FindPrimary("default", true), getRef());
 778
 779             LocalPrimaryShardFound found1 = expectMsgClass(duration("5 seconds"), LocalPrimaryShardFound.class);
 780             String path1 = found1.getPrimaryPath();
 781             assertTrue("Unexpected primary path " + path1, path1.contains("member-1-shard-default-config"));
 782
 783         }};
 784
 785         JavaTestKit.shutdownActorSystem(system1);
 786         JavaTestKit.shutdownActorSystem(system2);
 787     }
 788
 789
 790     @Test
 791     public void testOnReceiveFindLocalShardForNonExistentShard() throws Exception {
 792         new JavaTestKit(getSystem()) {{
 793             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 794
 795             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 796
 797             shardManager.tell(new FindLocalShard("non-existent", false), getRef());
 798
 799             LocalShardNotFound notFound = expectMsgClass(duration("5 seconds"), LocalShardNotFound.class);
 800
 801             assertEquals("getShardName", "non-existent", notFound.getShardName());
 802         }};
 803     }
 804
 805     @Test
 806     public void testOnReceiveFindLocalShardForExistentShard() throws Exception {
 807         new JavaTestKit(getSystem()) {{
 808             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 809
 810             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 811             shardManager.tell(new ActorInitialized(), mockShardActor);
 812
 813             shardManager.tell(new FindLocalShard(Shard.DEFAULT_NAME, false), getRef());
 814
 815             LocalShardFound found = expectMsgClass(duration("5 seconds"), LocalShardFound.class);
 816
 817             assertTrue("Found path contains " + found.getPath().path().toString(),
 818                     found.getPath().path().toString().contains("member-1-shard-default-config"));
 819         }};
 820     }
 821
 822     @Test
 823     public void testOnReceiveFindLocalShardForNotInitializedShard() throws Exception {
 824         new JavaTestKit(getSystem()) {{
 825             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 826
 827             shardManager.tell(new FindLocalShard(Shard.DEFAULT_NAME, false), getRef());
 828
 829             expectMsgClass(duration("5 seconds"), NotInitializedException.class);
 830         }};
 831     }
 832
 833     @Test
 834     public void testOnReceiveFindLocalShardWaitForShardInitialized() throws Exception {
 835         new JavaTestKit(getSystem()) {{
 836             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
 837
 838             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
 839
 840             // We're passing waitUntilInitialized = true to FindLocalShard so the response should be
 841             // delayed until we send ActorInitialized.
 842             Future<Object> future = Patterns.ask(shardManager, new FindLocalShard(Shard.DEFAULT_NAME, true),
 843                     new Timeout(5, TimeUnit.SECONDS));
 844
 845             shardManager.tell(new ActorInitialized(), mockShardActor);
 846
 847             Object resp = Await.result(future, duration("5 seconds"));
 848             assertTrue("Expected: LocalShardFound, Actual: " + resp, resp instanceof LocalShardFound);
 849         }};
 850     }
 851
 852     @Test
 853     public void testOnRecoveryJournalIsCleaned() {
 854         InMemoryJournal.addEntry(shardMgrID, 1L, new ShardManager.SchemaContextModules(
 855                 ImmutableSet.of("foo")));
 856         InMemoryJournal.addEntry(shardMgrID, 2L, new ShardManager.SchemaContextModules(
 857                 ImmutableSet.of("bar")));
 858         InMemoryJournal.addDeleteMessagesCompleteLatch(shardMgrID);
 859
 860         new JavaTestKit(getSystem()) {{
 861             TestActorRef<TestShardManager> shardManager = TestActorRef.create(getSystem(), newShardMgrProps());
 862
 863             shardManager.underlyingActor().waitForRecoveryComplete();
 864             InMemoryJournal.waitForDeleteMessagesComplete(shardMgrID);
 865
 866             // Journal entries up to the last one should've been deleted
 867             Map<Long, Object> journal = InMemoryJournal.get(shardMgrID);
 868             synchronized (journal) {
 869                 assertEquals("Journal size", 0, journal.size());
 870             }
 871         }};
 872     }
 873
 874     @Test
 875     public void testRoleChangeNotificationAndShardLeaderStateChangedReleaseReady() throws Exception {
 876         TestShardManager shardManager = newTestShardManager();
 877
 878         String memberId = "member-1-shard-default-" + shardMrgIDSuffix;
 879         shardManager.onReceiveCommand(new RoleChangeNotification(
 880                 memberId, RaftState.Candidate.name(), RaftState.Leader.name()));
 881
 882         verify(ready, never()).countDown();
 883
 884         shardManager.onReceiveCommand(new ShardLeaderStateChanged(memberId, memberId,
 885                 Optional.of(mock(DataTree.class)), DataStoreVersions.CURRENT_VERSION));
 886
 887         verify(ready, times(1)).countDown();
 888     }
 889
 890     @Test
 891     public void testRoleChangeNotificationToFollowerWithShardLeaderStateChangedReleaseReady() throws Exception {
 892         new JavaTestKit(getSystem()) {{
 893             TestShardManager shardManager = newTestShardManager();
 894
 895             String memberId = "member-1-shard-default-" + shardMrgIDSuffix;
 896             shardManager.onReceiveCommand(new RoleChangeNotification(
 897                     memberId, null, RaftState.Follower.name()));
 898
 899             verify(ready, never()).countDown();
 900
 901             shardManager.onReceiveCommand(MockClusterWrapper.createMemberUp("member-2", getRef().path().toString()));
 902
 903             shardManager.onReceiveCommand(new ShardLeaderStateChanged(memberId,
 904                     "member-2-shard-default-" + shardMrgIDSuffix, Optional.of(mock(DataTree.class)),
 905                     DataStoreVersions.CURRENT_VERSION));
 906
 907             verify(ready, times(1)).countDown();
 908         }};
 909     }
 910
 911     @Test
 912     public void testReadyCountDownForMemberUpAfterLeaderStateChanged() throws Exception {
 913         new JavaTestKit(getSystem()) {{
 914             TestShardManager shardManager = newTestShardManager();
 915
 916             String memberId = "member-1-shard-default-" + shardMrgIDSuffix;
 917             shardManager.onReceiveCommand(new RoleChangeNotification(memberId, null, RaftState.Follower.name()));
 918
 919             verify(ready, never()).countDown();
 920
 921             shardManager.onReceiveCommand(new ShardLeaderStateChanged(memberId,
 922                     "member-2-shard-default-" + shardMrgIDSuffix, Optional.of(mock(DataTree.class)),
 923                     DataStoreVersions.CURRENT_VERSION));
 924
 925             shardManager.onReceiveCommand(MockClusterWrapper.createMemberUp("member-2", getRef().path().toString()));
 926
 927             verify(ready, times(1)).countDown();
 928         }};
 929     }
 930
 931     @Test
 932     public void testRoleChangeNotificationDoNothingForUnknownShard() throws Exception {
 933         TestShardManager shardManager = newTestShardManager();
 934
 935         shardManager.onReceiveCommand(new RoleChangeNotification(
 936                 "unknown", RaftState.Candidate.name(), RaftState.Leader.name()));
 937
 938         verify(ready, never()).countDown();
 939     }
 940
 941     @Test
 942     public void testByDefaultSyncStatusIsFalse() throws Exception{
 943         TestShardManager shardManager = newTestShardManager();
 944
 945         assertEquals(false, shardManager.getMBean().getSyncStatus());
 946     }
 947
 948     @Test
 949     public void testWhenShardIsLeaderSyncStatusIsTrue() throws Exception{
 950         TestShardManager shardManager = newTestShardManager();
 951
 952         shardManager.onReceiveCommand(new RoleChangeNotification("member-1-shard-default-" + shardMrgIDSuffix,
 953                 RaftState.Follower.name(), RaftState.Leader.name()));
 954
 955         assertEquals(true, shardManager.getMBean().getSyncStatus());
 956     }
 957
 958     @Test
 959     public void testWhenShardIsCandidateSyncStatusIsFalse() throws Exception{
 960         TestShardManager shardManager = newTestShardManager();
 961
 962         String shardId = "member-1-shard-default-" + shardMrgIDSuffix;
 963         shardManager.onReceiveCommand(new RoleChangeNotification(shardId,
 964                 RaftState.Follower.name(), RaftState.Candidate.name()));
 965
 966         assertEquals(false, shardManager.getMBean().getSyncStatus());
 967
 968         // Send a FollowerInitialSyncStatus with status = true for the replica whose current state is candidate
 969         shardManager.onReceiveCommand(new FollowerInitialSyncUpStatus(
 970                 true, shardId));
 971
 972         assertEquals(false, shardManager.getMBean().getSyncStatus());
 973     }
 974
 975     @Test
 976     public void testWhenShardIsFollowerSyncStatusDependsOnFollowerInitialSyncStatus() throws Exception{
 977         TestShardManager shardManager = newTestShardManager();
 978
 979         String shardId = "member-1-shard-default-" + shardMrgIDSuffix;
 980         shardManager.onReceiveCommand(new RoleChangeNotification(shardId,
 981                 RaftState.Candidate.name(), RaftState.Follower.name()));
 982
 983         // Initially will be false
 984         assertEquals(false, shardManager.getMBean().getSyncStatus());
 985
 986         // Send status true will make sync status true
 987         shardManager.onReceiveCommand(new FollowerInitialSyncUpStatus(true, shardId));
 988
 989         assertEquals(true, shardManager.getMBean().getSyncStatus());
 990
 991         // Send status false will make sync status false
 992         shardManager.onReceiveCommand(new FollowerInitialSyncUpStatus(false, shardId));
 993
 994         assertEquals(false, shardManager.getMBean().getSyncStatus());
 995
 996     }
 997
 998     @Test
 999     public void testWhenMultipleShardsPresentSyncStatusMustBeTrueForAllShards() throws Exception{
1000         TestShardManager shardManager = newTestShardManager(newShardMgrProps(new MockConfiguration() {
1001             @Override
1002             public List<String> getMemberShardNames(String memberName) {
1003                 return Arrays.asList("default", "astronauts");
1004             }
1005         }));
1006
1007         // Initially will be false
1008         assertEquals(false, shardManager.getMBean().getSyncStatus());
1009
1010         // Make default shard leader
1011         String defaultShardId = "member-1-shard-default-" + shardMrgIDSuffix;
1012         shardManager.onReceiveCommand(new RoleChangeNotification(defaultShardId,
1013                 RaftState.Follower.name(), RaftState.Leader.name()));
1014
1015         // default = Leader, astronauts is unknown so sync status remains false
1016         assertEquals(false, shardManager.getMBean().getSyncStatus());
1017
1018         // Make astronauts shard leader as well
1019         String astronautsShardId = "member-1-shard-astronauts-" + shardMrgIDSuffix;
1020         shardManager.onReceiveCommand(new RoleChangeNotification(astronautsShardId,
1021                 RaftState.Follower.name(), RaftState.Leader.name()));
1022
1023         // Now sync status should be true
1024         assertEquals(true, shardManager.getMBean().getSyncStatus());
1025
1026         // Make astronauts a Follower
1027         shardManager.onReceiveCommand(new RoleChangeNotification(astronautsShardId,
1028                 RaftState.Leader.name(), RaftState.Follower.name()));
1029
1030         // Sync status is not true
1031         assertEquals(false, shardManager.getMBean().getSyncStatus());
1032
1033         // Make the astronauts follower sync status true
1034         shardManager.onReceiveCommand(new FollowerInitialSyncUpStatus(true, astronautsShardId));
1035
1036         // Sync status is now true
1037         assertEquals(true, shardManager.getMBean().getSyncStatus());
1038
1039     }
1040
1041     @Test
1042     public void testOnReceiveSwitchShardBehavior() throws Exception {
1043         new JavaTestKit(getSystem()) {{
1044             final ActorRef shardManager = getSystem().actorOf(newPropsShardMgrWithMockShardActor());
1045
1046             shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
1047             shardManager.tell(new ActorInitialized(), mockShardActor);
1048
1049             shardManager.tell(new SwitchShardBehavior(mockShardName, "Leader", 1000), getRef());
1050
1051             SwitchBehavior switchBehavior = MessageCollectorActor.expectFirstMatching(mockShardActor, SwitchBehavior.class);
1052
1053             assertEquals(RaftState.Leader, switchBehavior.getNewState());
1054             assertEquals(1000, switchBehavior.getNewTerm());
1055         }};
1056     }
1057
1058     @Test
1059     public void testOnReceiveCreateShard() {
1060         new JavaTestKit(getSystem()) {{
1061             datastoreContextBuilder.shardInitializationTimeout(1, TimeUnit.MINUTES).persistent(true);
1062
1063             ActorRef shardManager = getSystem().actorOf(newShardMgrProps(
1064                     new ConfigurationImpl(new EmptyModuleShardConfigProvider())));
1065
1066             SchemaContext schemaContext = TestModel.createTestContext();
1067             shardManager.tell(new UpdateSchemaContext(schemaContext), ActorRef.noSender());
1068
1069             DatastoreContext datastoreContext = DatastoreContext.newBuilder().shardElectionTimeoutFactor(100).
1070                     persistent(false).build();
1071             Shard.Builder shardBuilder = Shard.builder();
1072
1073             ModuleShardConfiguration config = new ModuleShardConfiguration(URI.create("foo-ns"), "foo-module",
1074                     "foo", null, Arrays.asList("member-1", "member-5", "member-6"));
1075             shardManager.tell(new CreateShard(config, shardBuilder, datastoreContext), getRef());
1076
1077             expectMsgClass(duration("5 seconds"), CreateShardReply.class);
1078
1079             shardManager.tell(new FindLocalShard("foo", true), getRef());
1080
1081             expectMsgClass(duration("5 seconds"), LocalShardFound.class);
1082
1083             assertEquals("isRecoveryApplicable", false, shardBuilder.getDatastoreContext().isPersistent());
1084             assertTrue("Epxected ShardPeerAddressResolver", shardBuilder.getDatastoreContext().getShardRaftConfig().
1085                     getPeerAddressResolver() instanceof ShardPeerAddressResolver);
1086             assertEquals("peerMembers", Sets.newHashSet(new ShardIdentifier("foo", "member-5", shardMrgIDSuffix).toString(),
1087                     new ShardIdentifier("foo", "member-6", shardMrgIDSuffix).toString()),
1088                     shardBuilder.getPeerAddresses().keySet());
1089             assertEquals("ShardIdentifier", new ShardIdentifier("foo", "member-1", shardMrgIDSuffix),
1090                     shardBuilder.getId());
1091             assertSame("schemaContext", schemaContext, shardBuilder.getSchemaContext());
1092
1093             // Send CreateShard with same name - should fail.
1094
1095             shardManager.tell(new CreateShard(config, shardBuilder, null), getRef());
1096
1097             expectMsgClass(duration("5 seconds"), akka.actor.Status.Failure.class);
1098         }};
1099     }
1100
1101     @Test
1102     public void testOnReceiveCreateShardWithNoInitialSchemaContext() {
1103         new JavaTestKit(getSystem()) {{
1104             ActorRef shardManager = getSystem().actorOf(newShardMgrProps(
1105                     new ConfigurationImpl(new EmptyModuleShardConfigProvider())));
1106
1107             Shard.Builder shardBuilder = Shard.builder();
1108
1109             ModuleShardConfiguration config = new ModuleShardConfiguration(URI.create("foo-ns"), "foo-module",
1110                     "foo", null, Arrays.asList("member-1"));
1111             shardManager.tell(new CreateShard(config, shardBuilder, null), getRef());
1112
1113             expectMsgClass(duration("5 seconds"), CreateShardReply.class);
1114
1115             SchemaContext schemaContext = TestModel.createTestContext();
1116             shardManager.tell(new UpdateSchemaContext(schemaContext), ActorRef.noSender());
1117
1118             shardManager.tell(new FindLocalShard("foo", true), getRef());
1119
1120             expectMsgClass(duration("5 seconds"), LocalShardFound.class);
1121
1122             assertSame("schemaContext", schemaContext, shardBuilder.getSchemaContext());
1123             assertNotNull("schemaContext is null", shardBuilder.getDatastoreContext());
1124         }};
1125     }
1126
1127     @Test
1128     public void testGetSnapshot() throws Throwable {
1129         JavaTestKit kit = new JavaTestKit(getSystem());
1130
1131         MockConfiguration mockConfig = new MockConfiguration(ImmutableMap.<String, List<String>>builder().
1132                    put("shard1", Arrays.asList("member-1")).
1133                    put("shard2", Arrays.asList("member-1")).build());
1134
1135         ActorRef shardManager = getSystem().actorOf(newShardMgrProps(mockConfig).withDispatcher(
1136                 Dispatchers.DefaultDispatcherId()));
1137
1138         shardManager.tell(GetSnapshot.INSTANCE, kit.getRef());
1139         Failure failure = kit.expectMsgClass(Failure.class);
1140         assertEquals("Failure cause type", IllegalStateException.class, failure.cause().getClass());
1141
1142         kit = new JavaTestKit(getSystem());
1143
1144         shardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), ActorRef.noSender());
1145
1146         shardManager.tell(new FindLocalShard("shard1", true), kit.getRef());
1147         kit.expectMsgClass(LocalShardFound.class);
1148         shardManager.tell(new FindLocalShard("shard2", true), kit.getRef());
1149         kit.expectMsgClass(LocalShardFound.class);
1150
1151         shardManager.tell(GetSnapshot.INSTANCE, kit.getRef());
1152
1153         DatastoreSnapshot datastoreSnapshot = kit.expectMsgClass(DatastoreSnapshot.class);
1154
1155         assertEquals("getType", shardMrgIDSuffix, datastoreSnapshot.getType());
1156         List<ShardSnapshot> shardSnapshots = datastoreSnapshot.getShardSnapshots();
1157         Set<String> actualShardNames = new HashSet<>();
1158         for(ShardSnapshot s: shardSnapshots) {
1159             actualShardNames.add(s.getName());
1160         }
1161
1162         assertEquals("Shard names", Sets.newHashSet("shard1", "shard2"), actualShardNames);
1163
1164         shardManager.tell(PoisonPill.getInstance(), ActorRef.noSender());
1165     }
1166
1167     @Test
1168     public void testAddShardReplicaForNonExistentShard() throws Exception {
1169         new JavaTestKit(getSystem()) {{
1170             ActorRef shardManager = getSystem().actorOf(newShardMgrProps(
1171                     new ConfigurationImpl(new EmptyModuleShardConfigProvider())));
1172
1173             shardManager.tell(new AddShardReplica("model-inventory"), getRef());
1174             Status.Failure resp = expectMsgClass(duration("2 seconds"), Status.Failure.class);
1175
1176             assertEquals("Failure obtained", true,
1177                           (resp.cause() instanceof IllegalArgumentException));
1178         }};
1179     }
1180
1181     @Test
1182     public void testAddShardReplicaForAlreadyCreatedShard() throws Exception {
1183         new JavaTestKit(getSystem()) {{
1184             ActorRef shardManager = getSystem().actorOf(newShardMgrProps());
1185             shardManager.tell(new AddShardReplica("default"), getRef());
1186             Status.Failure resp = expectMsgClass(duration("2 seconds"), Status.Failure.class);
1187             assertEquals("Failure obtained", true,
1188                           (resp.cause() instanceof IllegalArgumentException));
1189         }};
1190     }
1191
1192     @Test
1193     public void testAddShardReplica() throws Exception {
1194         MockConfiguration mockConfig =
1195                 new MockConfiguration(ImmutableMap.<String, List<String>>builder().
1196                    put("default", Arrays.asList("member-1", "member-2")).
1197                    put("astronauts", Arrays.asList("member-2")).build());
1198
1199         String shardManagerID = ShardManagerIdentifier.builder().type(shardMrgIDSuffix).build().toString();
1200
1201         // Create an ActorSystem ShardManager actor for member-1.
1202         final ActorSystem system1 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
1203         Cluster.get(system1).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
1204         ActorRef mockDefaultShardActor = newMockShardActor(system1, Shard.DEFAULT_NAME, "member-1");
1205         final TestActorRef<ForwardingShardManager> newReplicaShardManager = TestActorRef.create(system1,
1206                 newPropsShardMgrWithMockShardActor("shardManager1", mockDefaultShardActor,
1207                    new ClusterWrapperImpl(system1), mockConfig), shardManagerID);
1208
1209         // Create an ActorSystem ShardManager actor for member-2.
1210         final ActorSystem system2 = ActorSystem.create("cluster-test",
1211             ConfigFactory.load().getConfig("Member2"));
1212         Cluster.get(system2).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
1213
1214         String name = new ShardIdentifier("astronauts", "member-2", "config").toString();
1215         final TestActorRef<MockRespondActor> mockShardLeaderActor =
1216             TestActorRef.create(system2, Props.create(MockRespondActor.class), name);
1217         final TestActorRef<ForwardingShardManager> leaderShardManager = TestActorRef.create(system2,
1218                 newPropsShardMgrWithMockShardActor("shardManager2", mockShardLeaderActor,
1219                         new ClusterWrapperImpl(system2), mockConfig), shardManagerID);
1220
1221         new JavaTestKit(system1) {{
1222
1223             newReplicaShardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
1224             leaderShardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
1225
1226             leaderShardManager.tell(new ActorInitialized(), mockShardLeaderActor);
1227
1228             String memberId2 = "member-2-shard-astronauts-" + shardMrgIDSuffix;
1229             short leaderVersion = DataStoreVersions.CURRENT_VERSION - 1;
1230             leaderShardManager.tell(new ShardLeaderStateChanged(memberId2, memberId2,
1231                     Optional.of(mock(DataTree.class)), leaderVersion), mockShardLeaderActor);
1232             leaderShardManager.tell(new RoleChangeNotification(memberId2,
1233                     RaftState.Candidate.name(), RaftState.Leader.name()), mockShardLeaderActor);
1234
1235             newReplicaShardManager.underlyingActor().waitForMemberUp();
1236             leaderShardManager.underlyingActor().waitForMemberUp();
1237
1238             //construct a mock response message
1239             AddServerReply response = new AddServerReply(ServerChangeStatus.OK, memberId2);
1240             mockShardLeaderActor.underlyingActor().updateResponse(response);
1241             newReplicaShardManager.tell(new AddShardReplica("astronauts"), getRef());
1242             AddServer addServerMsg = MessageCollectorActor.expectFirstMatching(mockShardLeaderActor,
1243                 AddServer.class);
1244             String addServerId = "member-1-shard-astronauts-" + shardMrgIDSuffix;
1245             assertEquals("AddServer serverId", addServerId, addServerMsg.getNewServerId());
1246             newReplicaShardManager.underlyingActor()
1247                 .verifySnapshotPersisted(Sets.newHashSet("default", "astronauts"));
1248             expectMsgClass(duration("5 seconds"), Status.Success.class);
1249         }};
1250
1251         JavaTestKit.shutdownActorSystem(system1);
1252         JavaTestKit.shutdownActorSystem(system2);
1253     }
1254
1255     @Test
1256     public void testAddShardReplicaWithFindPrimaryTimeout() throws Exception {
1257         MockConfiguration mockConfig =
1258                 new MockConfiguration(ImmutableMap.<String, List<String>>builder().
1259                    put("default", Arrays.asList("member-1", "member-2")).
1260                    put("astronauts", Arrays.asList("member-2")).build());
1261
1262         String shardManagerID = ShardManagerIdentifier.builder().type(shardMrgIDSuffix).build().toString();
1263
1264         // Create an ActorSystem ShardManager actor for member-1.
1265         final ActorSystem system1 = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
1266         Cluster.get(system1).join(AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558"));
1267         ActorRef mockDefaultShardActor = newMockShardActor(system1, Shard.DEFAULT_NAME, "member-1");
1268         final TestActorRef<ForwardingShardManager> newReplicaShardManager = TestActorRef.create(system1,
1269                 newPropsShardMgrWithMockShardActor("shardManager1", mockDefaultShardActor,
1270                    new ClusterWrapperImpl(system1), mockConfig), shardManagerID);
1271
1272         new JavaTestKit(system1) {{
1273
1274             newReplicaShardManager.tell(new UpdateSchemaContext(TestModel.createTestContext()), getRef());
1275             MockClusterWrapper.sendMemberUp(newReplicaShardManager, "member-2", getRef().path().toString());
1276             newReplicaShardManager.underlyingActor().waitForMemberUp();
1277
1278             newReplicaShardManager.tell(new AddShardReplica("astronauts"), getRef());
1279             Status.Failure resp = expectMsgClass(duration("5 seconds"), Status.Failure.class);
1280             assertEquals("Failure obtained", true,
1281                           (resp.cause() instanceof RuntimeException));
1282         }};
1283
1284         JavaTestKit.shutdownActorSystem(system1);
1285     }
1286
1287     @Test
1288     public void testRemoveShardReplicaForNonExistentShard() throws Exception {
1289         new JavaTestKit(getSystem()) {{
1290             ActorRef shardManager = getSystem().actorOf(newShardMgrProps(
1291                     new ConfigurationImpl(new EmptyModuleShardConfigProvider())));
1292
1293             shardManager.tell(new RemoveShardReplica("model-inventory"), getRef());
1294             Status.Failure resp = expectMsgClass(duration("2 seconds"), Status.Failure.class);
1295             assertEquals("Failure obtained", true,
1296                          (resp.cause() instanceof IllegalArgumentException));
1297         }};
1298
1299     }
1300
1301     @Test
1302     public void testShardPersistenceWithRestoredData() throws Exception {
1303         new JavaTestKit(getSystem()) {{
1304             MockConfiguration mockConfig =
1305                 new MockConfiguration(ImmutableMap.<String, List<String>>builder().
1306                    put("default", Arrays.asList("member-1", "member-2")).
1307                    put("astronauts", Arrays.asList("member-2")).
1308                    put("people", Arrays.asList("member-1", "member-2")).build());
1309             String[] restoredShards = {"default", "astronauts"};
1310             ShardManagerSnapshot snapshot = new ShardManagerSnapshot(Arrays.asList(restoredShards));
1311             InMemorySnapshotStore.addSnapshot(shardMgrID, snapshot);
1312
1313             //create shardManager to come up with restored data
1314             TestActorRef<TestShardManager> newRestoredShardManager = TestActorRef.create(getSystem(),
1315                     newShardMgrProps(mockConfig));
1316
1317             newRestoredShardManager.underlyingActor().waitForRecoveryComplete();
1318
1319             newRestoredShardManager.tell(new FindLocalShard("people", false), getRef());
1320             LocalShardNotFound notFound = expectMsgClass(duration("5 seconds"), LocalShardNotFound.class);
1321             assertEquals("for uninitialized shard", "people", notFound.getShardName());
1322
1323             //Verify a local shard is created for the restored shards,
1324             //although we expect a NotInitializedException for the shards as the actor initialization
1325             //message is not sent for them
1326             newRestoredShardManager.tell(new FindLocalShard("default", false), getRef());
1327             expectMsgClass(duration("5 seconds"), NotInitializedException.class);
1328
1329             newRestoredShardManager.tell(new FindLocalShard("astronauts", false), getRef());
1330             expectMsgClass(duration("5 seconds"), NotInitializedException.class);
1331         }};
1332     }
1333
1334
1335     private static class TestShardManager extends ShardManager {
1336         private final CountDownLatch recoveryComplete = new CountDownLatch(1);
1337
1338         private TestShardManager(Builder builder) {
1339             super(builder);
1340         }
1341
1342         @Override
1343         public void handleRecover(Object message) throws Exception {
1344             try {
1345                 super.handleRecover(message);
1346             } finally {
1347                 if(message instanceof RecoveryCompleted) {
1348                     recoveryComplete.countDown();
1349                 }
1350             }
1351         }
1352
1353         void waitForRecoveryComplete() {
1354             assertEquals("Recovery complete", true,
1355                     Uninterruptibles.awaitUninterruptibly(recoveryComplete, 5, TimeUnit.SECONDS));
1356         }
1357
1358         public static Builder builder(DatastoreContext.Builder datastoreContextBuilder) {
1359             return new Builder(datastoreContextBuilder);
1360         }
1361
1362         private static class Builder extends ShardManager.Builder {
1363             Builder(DatastoreContext.Builder datastoreContextBuilder) {
1364                 cluster(new MockClusterWrapper()).configuration(new MockConfiguration());
1365                 datastoreContextFactory(newDatastoreContextFactory(datastoreContextBuilder.build()));
1366                 waitTillReadyCountdownLatch(ready).primaryShardInfoCache(new PrimaryShardInfoFutureCache());
1367             }
1368
1369             @Override
1370             public Props props() {
1371                 verify();
1372                 return Props.create(TestShardManager.class, this);
1373             }
1374         }
1375     }
1376
1377     private static class DelegatingShardManagerCreator implements Creator<ShardManager> {
1378         private static final long serialVersionUID = 1L;
1379         private final Creator<ShardManager> delegate;
1380
1381         public DelegatingShardManagerCreator(Creator<ShardManager> delegate) {
1382             this.delegate = delegate;
1383         }
1384
1385         @Override
1386         public ShardManager create() throws Exception {
1387             return delegate.create();
1388         }
1389     }
1390
1391     private static class ForwardingShardManager extends ShardManager {
1392         private CountDownLatch findPrimaryMessageReceived = new CountDownLatch(1);
1393         private CountDownLatch memberUpReceived = new CountDownLatch(1);
1394         private CountDownLatch memberRemovedReceived = new CountDownLatch(1);
1395         private CountDownLatch memberUnreachableReceived = new CountDownLatch(1);
1396         private CountDownLatch memberReachableReceived = new CountDownLatch(1);
1397         private final ActorRef shardActor;
1398         private final String name;
1399         private final CountDownLatch snapshotPersist = new CountDownLatch(1);
1400         private ShardManagerSnapshot snapshot;
1401
1402         public ForwardingShardManager(Builder builder, String name, ActorRef shardActor) {
1403             super(builder);
1404             this.shardActor = shardActor;
1405             this.name = name;
1406         }
1407
1408         @Override
1409         public void handleCommand(Object message) throws Exception {
1410             try{
1411                 super.handleCommand(message);
1412             } finally {
1413                 if(message instanceof FindPrimary) {
1414                     findPrimaryMessageReceived.countDown();
1415                 } else if(message instanceof ClusterEvent.MemberUp) {
1416                     String role = ((ClusterEvent.MemberUp)message).member().roles().head();
1417                     if(!getCluster().getCurrentMemberName().equals(role)) {
1418                         memberUpReceived.countDown();
1419                     }
1420                 } else if(message instanceof ClusterEvent.MemberRemoved) {
1421                     String role = ((ClusterEvent.MemberRemoved)message).member().roles().head();
1422                     if(!getCluster().getCurrentMemberName().equals(role)) {
1423                         memberRemovedReceived.countDown();
1424                     }
1425                 } else if(message instanceof ClusterEvent.UnreachableMember) {
1426                     String role = ((ClusterEvent.UnreachableMember)message).member().roles().head();
1427                     if(!getCluster().getCurrentMemberName().equals(role)) {
1428                         memberUnreachableReceived.countDown();
1429                     }
1430                 } else if(message instanceof ClusterEvent.ReachableMember) {
1431                     String role = ((ClusterEvent.ReachableMember)message).member().roles().head();
1432                     if(!getCluster().getCurrentMemberName().equals(role)) {
1433                         memberReachableReceived.countDown();
1434                     }
1435                 }
1436             }
1437         }
1438
1439         @Override
1440         public String persistenceId() {
1441             return name;
1442         }
1443
1444         @Override
1445         protected ActorRef newShardActor(SchemaContext schemaContext, ShardInformation info) {
1446             return shardActor;
1447         }
1448
1449         void waitForMemberUp() {
1450             assertEquals("MemberUp received", true,
1451                     Uninterruptibles.awaitUninterruptibly(memberUpReceived, 5, TimeUnit.SECONDS));
1452             memberUpReceived = new CountDownLatch(1);
1453         }
1454
1455         void waitForMemberRemoved() {
1456             assertEquals("MemberRemoved received", true,
1457                     Uninterruptibles.awaitUninterruptibly(memberRemovedReceived, 5, TimeUnit.SECONDS));
1458             memberRemovedReceived = new CountDownLatch(1);
1459         }
1460
1461         void waitForUnreachableMember() {
1462             assertEquals("UnreachableMember received", true,
1463                 Uninterruptibles.awaitUninterruptibly(memberUnreachableReceived, 5, TimeUnit.SECONDS
1464                 ));
1465             memberUnreachableReceived = new CountDownLatch(1);
1466         }
1467
1468         void waitForReachableMember() {
1469             assertEquals("ReachableMember received", true,
1470                 Uninterruptibles.awaitUninterruptibly(memberReachableReceived, 5, TimeUnit.SECONDS));
1471             memberReachableReceived = new CountDownLatch(1);
1472         }
1473
1474         void verifyFindPrimary() {
1475             assertEquals("FindPrimary received", true,
1476                     Uninterruptibles.awaitUninterruptibly(findPrimaryMessageReceived, 5, TimeUnit.SECONDS));
1477             findPrimaryMessageReceived = new CountDownLatch(1);
1478         }
1479
1480         @Override
1481         public void saveSnapshot(Object obj) {
1482             snapshot = (ShardManagerSnapshot) obj;
1483             snapshotPersist.countDown();
1484         }
1485
1486         void verifySnapshotPersisted(Set<String> shardList) {
1487             assertEquals("saveSnapshot invoked", true,
1488                 Uninterruptibles.awaitUninterruptibly(snapshotPersist, 5, TimeUnit.SECONDS));
1489             assertEquals("Shard Persisted", shardList, Sets.newHashSet(snapshot.getShardList()));
1490         }
1491     }
1492
1493     private static class MockRespondActor extends MessageCollectorActor {
1494
1495         private volatile Object responseMsg;
1496
1497         public void updateResponse(Object response) {
1498             responseMsg = response;
1499         }
1500
1501         @Override
1502         public void onReceive(Object message) throws Exception {
1503             super.onReceive(message);
1504             if (message instanceof AddServer) {
1505                 if (responseMsg != null) {
1506                     getSender().tell(responseMsg, getSelf());
1507                     responseMsg = null;
1508                 }
1509             }
1510         }
1511     }
1512 }