opendaylight/md-sal/sal-distributed-eos/src/test/java/org/opendaylight/controller/cluster/entityownership/DistributedEntityOwnershipIntegrationTest.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.entityownership;
   9
  10 import static org.hamcrest.MatcherAssert.assertThat;
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertNull;
  13 import static org.junit.Assert.assertTrue;
  14 import static org.mockito.AdditionalMatchers.or;
  15 import static org.mockito.Mockito.doNothing;
  16 import static org.mockito.Mockito.never;
  17 import static org.mockito.Mockito.reset;
  18 import static org.mockito.Mockito.timeout;
  19 import static org.mockito.Mockito.verify;
  20 import static org.opendaylight.controller.cluster.datastore.MemberNode.verifyRaftState;
  21 import static org.opendaylight.controller.cluster.entityownership.AbstractEntityOwnershipTest.ownershipChange;
  22 import static org.opendaylight.controller.cluster.entityownership.DistributedEntityOwnershipService.ENTITY_OWNERSHIP_SHARD_NAME;
  23 import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.CANDIDATE_NAME_NODE_ID;
  24 import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.entityPath;
  25
  26 import akka.actor.ActorRef;
  27 import akka.actor.Status.Failure;
  28 import akka.actor.Status.Success;
  29 import akka.cluster.Cluster;
  30 import akka.pattern.Patterns;
  31 import akka.util.Timeout;
  32 import com.google.common.base.Stopwatch;
  33 import com.google.common.collect.ImmutableMap;
  34 import com.google.common.collect.Iterables;
  35 import com.google.common.collect.Lists;
  36 import com.google.common.util.concurrent.Uninterruptibles;
  37 import java.util.ArrayList;
  38 import java.util.Arrays;
  39 import java.util.Collection;
  40 import java.util.List;
  41 import java.util.Optional;
  42 import java.util.concurrent.TimeUnit;
  43 import org.junit.After;
  44 import org.junit.Before;
  45 import org.junit.Test;
  46 import org.mockito.ArgumentCaptor;
  47 import org.mockito.Mock;
  48 import org.mockito.Mockito;
  49 import org.mockito.MockitoAnnotations;
  50 import org.mockito.exceptions.base.MockitoException;
  51 import org.opendaylight.controller.cluster.datastore.AbstractDataStore;
  52 import org.opendaylight.controller.cluster.datastore.DatastoreContext;
  53 import org.opendaylight.controller.cluster.datastore.IntegrationTestKit;
  54 import org.opendaylight.controller.cluster.datastore.MemberNode;
  55 import org.opendaylight.controller.cluster.datastore.messages.AddShardReplica;
  56 import org.opendaylight.controller.cluster.datastore.messages.ChangeShardMembersVotingStatus;
  57 import org.opendaylight.controller.cluster.entityownership.selectionstrategy.EntityOwnerSelectionStrategyConfig;
  58 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  59 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  60 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  61 import org.opendaylight.mdsal.eos.common.api.EntityOwnershipState;
  62 import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
  63 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipCandidateRegistration;
  64 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipChange;
  65 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipListener;
  66 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipService;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.clustering.entity.owners.rev150804.entity.owners.entity.type.entity.Candidate;
  68 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  69 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  70 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  71 import scala.concurrent.Await;
  72 import scala.concurrent.Future;
  73 import scala.concurrent.duration.FiniteDuration;
  74
  75 /**
  76  * End-to-end integration tests for the entity ownership functionality.
  77  *
  78  * @author Thomas Pantelis
  79  */
  80 public class DistributedEntityOwnershipIntegrationTest {
  81     private static final String MODULE_SHARDS_CONFIG = "module-shards-default.conf";
  82     private static final String MODULE_SHARDS_5_NODE_CONFIG = "module-shards-default-5-node.conf";
  83     private static final String MODULE_SHARDS_MEMBER_1_CONFIG = "module-shards-default-member-1.conf";
  84     private static final String ENTITY_TYPE1 = "entityType1";
  85     private static final String ENTITY_TYPE2 = "entityType2";
  86     private static final DOMEntity ENTITY1 = new DOMEntity(ENTITY_TYPE1, "entity1");
  87     private static final DOMEntity ENTITY1_2 = new DOMEntity(ENTITY_TYPE2, "entity1");
  88     private static final DOMEntity ENTITY2 = new DOMEntity(ENTITY_TYPE1, "entity2");
  89     private static final DOMEntity ENTITY3 = new DOMEntity(ENTITY_TYPE1, "entity3");
  90     private static final DOMEntity ENTITY4 = new DOMEntity(ENTITY_TYPE1, "entity4");
  91     private final DatastoreContext.Builder leaderDatastoreContextBuilder =
  92             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5)
  93                     .shardIsolatedLeaderCheckIntervalInMillis(1000000);
  94
  95     private final DatastoreContext.Builder followerDatastoreContextBuilder =
  96             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(10000);
  97
  98     private final List<MemberNode> memberNodes = new ArrayList<>();
  99
 100     @Mock
 101     private DOMEntityOwnershipListener leaderMockListener;
 102
 103     @Mock
 104     private DOMEntityOwnershipListener leaderMockListener2;
 105
 106     @Mock
 107     private DOMEntityOwnershipListener follower1MockListener;
 108
 109     @Mock
 110     private DOMEntityOwnershipListener follower2MockListener;
 111
 112     @Before
 113     public void setUp() {
 114         MockitoAnnotations.initMocks(this);
 115         InMemoryJournal.clear();
 116         InMemorySnapshotStore.clear();
 117     }
 118
 119     @After
 120     public void tearDown() {
 121         for (MemberNode m : Lists.reverse(memberNodes)) {
 122             m.cleanup();
 123         }
 124         memberNodes.clear();
 125     }
 126
 127     private static DistributedEntityOwnershipService newOwnershipService(final AbstractDataStore datastore) {
 128         return DistributedEntityOwnershipService.start(datastore.getActorUtils(),
 129                 EntityOwnerSelectionStrategyConfig.newBuilder().build());
 130     }
 131
 132     @Test
 133     public void testFunctionalityWithThreeNodes() throws Exception {
 134         String name = "testFunctionalityWithThreeNodes";
 135         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 136                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 137                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 138
 139         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 140                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 141                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 142
 143         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 144                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 145                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 146
 147         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 148
 149         leaderDistributedDataStore.waitTillReady();
 150         follower1Node.configDataStore().waitTillReady();
 151         follower2Node.configDataStore().waitTillReady();
 152
 153         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 154         final DOMEntityOwnershipService follower1EntityOwnershipService =
 155                 newOwnershipService(follower1Node.configDataStore());
 156         final DOMEntityOwnershipService follower2EntityOwnershipService =
 157                 newOwnershipService(follower2Node.configDataStore());
 158
 159         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 160
 161         leaderEntityOwnershipService.registerListener(ENTITY_TYPE1, leaderMockListener);
 162         leaderEntityOwnershipService.registerListener(ENTITY_TYPE2, leaderMockListener2);
 163         follower1EntityOwnershipService.registerListener(ENTITY_TYPE1, follower1MockListener);
 164
 165         // Register leader candidate for entity1 and verify it becomes owner
 166
 167         leaderEntityOwnershipService.registerCandidate(ENTITY1);
 168         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, true, true));
 169         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 170         reset(leaderMockListener, follower1MockListener);
 171
 172         verifyGetOwnershipState(leaderEntityOwnershipService, ENTITY1, EntityOwnershipState.IS_OWNER);
 173         verifyGetOwnershipState(follower1EntityOwnershipService, ENTITY1, EntityOwnershipState.OWNED_BY_OTHER);
 174
 175         // Register leader candidate for entity1_2 (same id, different type) and verify it becomes owner
 176
 177         leaderEntityOwnershipService.registerCandidate(ENTITY1_2);
 178         verify(leaderMockListener2, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1_2, false, true, true));
 179         Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 180         verify(leaderMockListener, never()).ownershipChanged(ownershipChange(ENTITY1_2));
 181         reset(leaderMockListener2);
 182
 183         // Register follower1 candidate for entity1 and verify it gets added but doesn't become owner
 184
 185         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 186         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-1", "member-2");
 187         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-1");
 188         verifyOwner(follower2Node.configDataStore(), ENTITY1, "member-1");
 189         Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 190         verify(leaderMockListener, never()).ownershipChanged(ownershipChange(ENTITY1));
 191         verify(follower1MockListener, never()).ownershipChanged(ownershipChange(ENTITY1));
 192
 193         // Register follower1 candidate for entity2 and verify it becomes owner
 194
 195         final DOMEntityOwnershipCandidateRegistration follower1Entity2Reg =
 196                 follower1EntityOwnershipService.registerCandidate(ENTITY2);
 197         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, true, true));
 198         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, false, true));
 199         verifyOwner(follower2Node.configDataStore(), ENTITY2, "member-2");
 200         reset(leaderMockListener, follower1MockListener);
 201
 202         // Register follower2 candidate for entity2 and verify it gets added but doesn't become owner
 203
 204         follower2EntityOwnershipService.registerListener(ENTITY_TYPE1, follower2MockListener);
 205         verify(follower2MockListener, timeout(5000).times(2)).ownershipChanged(or(
 206                 ownershipChange(ENTITY1, false, false, true), ownershipChange(ENTITY2, false, false, true)));
 207
 208         follower2EntityOwnershipService.registerCandidate(ENTITY2);
 209         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-2", "member-3");
 210         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-2");
 211
 212         // Unregister follower1 candidate for entity2 and verify follower2 becomes owner
 213
 214         follower1Entity2Reg.close();
 215         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-3");
 216         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-3");
 217         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, true, false, true));
 218         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, false, true));
 219
 220         // Depending on timing, follower2MockListener could get ownershipChanged with "false, false, true" if
 221         // if the original ownership change with "member-2 is replicated to follower2 after the listener is
 222         // registered.
 223         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
 224         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, true, true));
 225
 226         // Register follower1 candidate for entity3 and verify it becomes owner
 227
 228         follower1EntityOwnershipService.registerCandidate(ENTITY3);
 229         verifyOwner(leaderDistributedDataStore, ENTITY3, "member-2");
 230         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY3, false, true, true));
 231         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY3, false, false, true));
 232         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY3, false, false, true));
 233
 234         // Register follower2 candidate for entity4 and verify it becomes owner
 235
 236         follower2EntityOwnershipService.registerCandidate(ENTITY4);
 237         verifyOwner(leaderDistributedDataStore, ENTITY4, "member-3");
 238         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY4, false, true, true));
 239         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY4, false, false, true));
 240         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY4, false, false, true));
 241         reset(follower1MockListener, follower2MockListener);
 242
 243         // Register follower1 candidate for entity4 and verify it gets added but doesn't become owner
 244
 245         follower1EntityOwnershipService.registerCandidate(ENTITY4);
 246         verifyCandidates(leaderDistributedDataStore, ENTITY4, "member-3", "member-2");
 247         verifyOwner(leaderDistributedDataStore, ENTITY4, "member-3");
 248
 249         // Shutdown follower2 and verify it's owned entities (entity 4) get re-assigned
 250
 251         reset(leaderMockListener, follower1MockListener);
 252         follower2Node.cleanup();
 253
 254         verify(follower1MockListener, timeout(15000)).ownershipChanged(ownershipChange(ENTITY4, false, true, true));
 255         verify(leaderMockListener, timeout(15000)).ownershipChanged(ownershipChange(ENTITY4, false, false, true));
 256
 257         // Register leader candidate for entity2 and verify it becomes owner
 258
 259         DOMEntityOwnershipCandidateRegistration leaderEntity2Reg =
 260                 leaderEntityOwnershipService.registerCandidate(ENTITY2);
 261         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 262         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, true, true));
 263
 264         // Unregister leader candidate for entity2 and verify the owner is cleared
 265
 266         leaderEntity2Reg.close();
 267         verifyOwner(leaderDistributedDataStore, ENTITY2, "");
 268         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, true, false, false));
 269         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY2, false, false, false));
 270     }
 271
 272     @Test
 273     public void testLeaderEntityOwnersReassignedAfterShutdown() throws Exception {
 274         followerDatastoreContextBuilder.shardElectionTimeoutFactor(5)
 275                     .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 276
 277         String name = "testLeaderEntityOwnersReassignedAfterShutdown";
 278         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 279                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 280                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 281
 282         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 283                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 284                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 285
 286         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 287                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 288                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 289
 290         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 291
 292         leaderDistributedDataStore.waitTillReady();
 293         follower1Node.configDataStore().waitTillReady();
 294         follower2Node.configDataStore().waitTillReady();
 295
 296         follower1Node.waitForMembersUp("member-1", "member-3");
 297
 298         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 299         final DOMEntityOwnershipService follower1EntityOwnershipService =
 300                 newOwnershipService(follower1Node.configDataStore());
 301         final DOMEntityOwnershipService follower2EntityOwnershipService =
 302                 newOwnershipService(follower2Node.configDataStore());
 303
 304         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 305
 306         // Register follower1 candidate for entity1 and verify it becomes owner
 307
 308         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 309         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 310
 311         // Register leader candidate for entity1
 312
 313         leaderEntityOwnershipService.registerCandidate(ENTITY1);
 314         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2", "member-1");
 315         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 316
 317         // Register leader candidate for entity2 and verify it becomes owner
 318
 319         leaderEntityOwnershipService.registerCandidate(ENTITY2);
 320         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 321
 322         // Register follower2 candidate for entity2
 323
 324         follower2EntityOwnershipService.registerCandidate(ENTITY2);
 325         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-1", "member-3");
 326         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 327
 328         // Re-enable elections on all remaining followers so one becomes the new leader
 329
 330         ActorRef follower1Shard = IntegrationTestKit.findLocalShard(follower1Node.configDataStore().getActorUtils(),
 331                 ENTITY_OWNERSHIP_SHARD_NAME);
 332         follower1Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 333                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 334
 335         ActorRef follower2Shard = IntegrationTestKit.findLocalShard(follower2Node.configDataStore().getActorUtils(),
 336                 ENTITY_OWNERSHIP_SHARD_NAME);
 337         follower2Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 338                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 339
 340         // Shutdown the leader and verify its removed from the candidate list
 341
 342         leaderNode.cleanup();
 343         follower1Node.waitForMemberDown("member-1");
 344         follower2Node.waitForMemberDown("member-1");
 345
 346         // Verify the prior leader's entity owners are re-assigned.
 347
 348         verifyCandidates(follower1Node.configDataStore(), ENTITY1, "member-2", "member-1");
 349         verifyCandidates(follower1Node.configDataStore(), ENTITY2, "member-1", "member-3");
 350         verifyOwner(follower1Node.configDataStore(), ENTITY1, "member-2");
 351         verifyOwner(follower1Node.configDataStore(), ENTITY2, "member-3");
 352     }
 353
 354     @Test
 355     public void testLeaderAndFollowerEntityOwnersReassignedAfterShutdown() throws Exception {
 356         followerDatastoreContextBuilder.shardElectionTimeoutFactor(5)
 357                 .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 358
 359         String name = "testLeaderAndFollowerEntityOwnersReassignedAfterShutdown";
 360         final MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1")
 361                 .useAkkaArtery(false).testName(name)
 362                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG)
 363                 .schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 364                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 365
 366         final MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2")
 367                 .testName(name).moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG)
 368                 .useAkkaArtery(false).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 369                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 370
 371         final MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3")
 372                 .testName(name).moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG)
 373                 .useAkkaArtery(false).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 374                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 375
 376         final MemberNode follower3Node = MemberNode.builder(memberNodes).akkaConfig("Member4")
 377                 .testName(name).moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG)
 378                 .useAkkaArtery(false).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 379                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 380
 381         final MemberNode follower4Node = MemberNode.builder(memberNodes).akkaConfig("Member5")
 382                 .testName(name).moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG)
 383                 .useAkkaArtery(false).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 384                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 385
 386         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 387
 388         leaderDistributedDataStore.waitTillReady();
 389         follower1Node.configDataStore().waitTillReady();
 390         follower2Node.configDataStore().waitTillReady();
 391         follower3Node.configDataStore().waitTillReady();
 392         follower4Node.configDataStore().waitTillReady();
 393
 394         leaderNode.waitForMembersUp("member-2", "member-3", "member-4", "member-5");
 395         follower1Node.waitForMembersUp("member-1", "member-3", "member-4", "member-5");
 396
 397         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 398         final DOMEntityOwnershipService follower1EntityOwnershipService =
 399                 newOwnershipService(follower1Node.configDataStore());
 400         final DOMEntityOwnershipService follower2EntityOwnershipService =
 401                 newOwnershipService(follower2Node.configDataStore());
 402         final DOMEntityOwnershipService follower3EntityOwnershipService =
 403                 newOwnershipService(follower3Node.configDataStore());
 404         newOwnershipService(follower4Node.configDataStore());
 405
 406         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 407
 408         // Register follower1 candidate for entity1 and verify it becomes owner
 409
 410         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 411         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 412
 413         // Register leader candidate for entity1
 414
 415         leaderEntityOwnershipService.registerCandidate(ENTITY1);
 416         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2", "member-1");
 417         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 418
 419         // Register leader candidate for entity2 and verify it becomes owner
 420
 421         leaderEntityOwnershipService.registerCandidate(ENTITY2);
 422         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 423
 424         // Register follower2 candidate for entity2
 425
 426         follower2EntityOwnershipService.registerCandidate(ENTITY2);
 427         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-1", "member-3");
 428         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 429
 430         // Register follower3 as a candidate for entity2 as well
 431
 432         follower3EntityOwnershipService.registerCandidate(ENTITY2);
 433         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-1", "member-3", "member-4");
 434         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-1");
 435
 436         // Re-enable elections on all remaining followers so one becomes the new leader
 437
 438         ActorRef follower1Shard = IntegrationTestKit.findLocalShard(follower1Node.configDataStore().getActorUtils(),
 439                 ENTITY_OWNERSHIP_SHARD_NAME);
 440         follower1Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 441                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 442
 443         ActorRef follower2Shard = IntegrationTestKit.findLocalShard(follower2Node.configDataStore().getActorUtils(),
 444                 ENTITY_OWNERSHIP_SHARD_NAME);
 445         follower2Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 446                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 447
 448         ActorRef follower4Shard = IntegrationTestKit.findLocalShard(follower4Node.configDataStore().getActorUtils(),
 449                 ENTITY_OWNERSHIP_SHARD_NAME);
 450         follower4Shard.tell(DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build())
 451                 .customRaftPolicyImplementation(null).build(), ActorRef.noSender());
 452
 453         // Shutdown the leader and follower3
 454
 455         leaderNode.cleanup();
 456
 457         follower1Node.waitForMemberDown("member-1");
 458         follower2Node.waitForMemberDown("member-1");
 459         follower4Node.waitForMemberDown("member-1");
 460
 461         follower3Node.cleanup();
 462
 463         follower1Node.waitForMemberDown("member-4");
 464         follower2Node.waitForMemberDown("member-4");
 465         follower4Node.waitForMemberDown("member-4");
 466
 467         // Verify the prior leader's and follower3 entity owners are re-assigned.
 468
 469         verifyCandidates(follower1Node.configDataStore(), ENTITY1, "member-2", "member-1");
 470         verifyCandidates(follower1Node.configDataStore(), ENTITY2, "member-1", "member-3", "member-4");
 471         verifyOwner(follower1Node.configDataStore(), ENTITY1, "member-2");
 472         verifyOwner(follower1Node.configDataStore(), ENTITY2, "member-3");
 473     }
 474
 475     /**
 476      * Reproduces bug <a href="https://bugs.opendaylight.org/show_bug.cgi?id=4554">4554</a>.
 477      */
 478     @Test
 479     public void testCloseCandidateRegistrationInQuickSuccession() throws Exception {
 480         String name = "testCloseCandidateRegistrationInQuickSuccession";
 481         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 482                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 483                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 484
 485         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 486                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 487                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 488
 489         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 490                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 491                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 492
 493         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 494
 495         leaderDistributedDataStore.waitTillReady();
 496         follower1Node.configDataStore().waitTillReady();
 497         follower2Node.configDataStore().waitTillReady();
 498
 499         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 500         final DOMEntityOwnershipService follower1EntityOwnershipService =
 501                 newOwnershipService(follower1Node.configDataStore());
 502         final DOMEntityOwnershipService follower2EntityOwnershipService =
 503                 newOwnershipService(follower2Node.configDataStore());
 504
 505         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 506
 507         leaderEntityOwnershipService.registerListener(ENTITY_TYPE1, leaderMockListener);
 508         follower1EntityOwnershipService.registerListener(ENTITY_TYPE1, follower1MockListener);
 509         follower2EntityOwnershipService.registerListener(ENTITY_TYPE1, follower2MockListener);
 510
 511         final DOMEntityOwnershipCandidateRegistration candidate1 =
 512                 leaderEntityOwnershipService.registerCandidate(ENTITY1);
 513         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, true, true));
 514
 515         final DOMEntityOwnershipCandidateRegistration candidate2 =
 516                 follower1EntityOwnershipService.registerCandidate(ENTITY1);
 517         verify(follower1MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 518
 519         final DOMEntityOwnershipCandidateRegistration candidate3 =
 520                 follower2EntityOwnershipService.registerCandidate(ENTITY1);
 521         verify(follower2MockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 522
 523         Mockito.reset(leaderMockListener, follower1MockListener, follower2MockListener);
 524
 525         ArgumentCaptor<DOMEntityOwnershipChange> leaderChangeCaptor =
 526                 ArgumentCaptor.forClass(DOMEntityOwnershipChange.class);
 527         ArgumentCaptor<DOMEntityOwnershipChange> follower1ChangeCaptor =
 528                 ArgumentCaptor.forClass(DOMEntityOwnershipChange.class);
 529         ArgumentCaptor<DOMEntityOwnershipChange> follower2ChangeCaptor =
 530                 ArgumentCaptor.forClass(DOMEntityOwnershipChange.class);
 531         doNothing().when(leaderMockListener).ownershipChanged(leaderChangeCaptor.capture());
 532         doNothing().when(follower1MockListener).ownershipChanged(follower1ChangeCaptor.capture());
 533         doNothing().when(follower2MockListener).ownershipChanged(follower2ChangeCaptor.capture());
 534
 535         candidate1.close();
 536         candidate2.close();
 537         candidate3.close();
 538
 539         boolean passed = false;
 540         for (int i = 0; i < 100; i++) {
 541             Uninterruptibles.sleepUninterruptibly(50, TimeUnit.MILLISECONDS);
 542             final Optional<EntityOwnershipState> leaderState = leaderEntityOwnershipService.getOwnershipState(ENTITY1);
 543             final Optional<EntityOwnershipState> follower1State =
 544                     follower1EntityOwnershipService.getOwnershipState(ENTITY1);
 545             final Optional<EntityOwnershipState> follower2State =
 546                     follower2EntityOwnershipService.getOwnershipState(ENTITY1);
 547             final Optional<DOMEntityOwnershipChange> leaderChange = getValueSafely(leaderChangeCaptor);
 548             final Optional<DOMEntityOwnershipChange> follower1Change = getValueSafely(follower1ChangeCaptor);
 549             final Optional<DOMEntityOwnershipChange> follower2Change = getValueSafely(follower2ChangeCaptor);
 550             if (!leaderState.isPresent() || leaderState.get() == EntityOwnershipState.NO_OWNER
 551                     && follower1State.isPresent() && follower1State.get() == EntityOwnershipState.NO_OWNER
 552                     && follower2State.isPresent() && follower2State.get() == EntityOwnershipState.NO_OWNER
 553                     && leaderChange.isPresent() && !leaderChange.get().getState().hasOwner()
 554                     && follower1Change.isPresent() && !follower1Change.get().getState().hasOwner()
 555                     && follower2Change.isPresent() && !follower2Change.get().getState().hasOwner()) {
 556                 passed = true;
 557                 break;
 558             }
 559         }
 560
 561         assertTrue("No ownership change message was sent with hasOwner=false", passed);
 562     }
 563
 564     private static Optional<DOMEntityOwnershipChange> getValueSafely(
 565             final ArgumentCaptor<DOMEntityOwnershipChange> captor) {
 566         try {
 567             return Optional.ofNullable(captor.getValue());
 568         } catch (MockitoException e) {
 569             // No value was captured
 570             return Optional.empty();
 571         }
 572     }
 573
 574     /**
 575      * Tests bootstrapping the entity-ownership shard when there's no shards initially configured for local
 576      * member. The entity-ownership shard is initially created as inactive (ie remains a follower), requiring
 577      * an AddShardReplica request to join it to an existing leader.
 578      */
 579     @Test
 580     public void testEntityOwnershipShardBootstrapping() throws Exception {
 581         String name = "testEntityOwnershipShardBootstrapping";
 582         String moduleShardsConfig = MODULE_SHARDS_MEMBER_1_CONFIG;
 583         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 584                 .moduleShardsConfig(moduleShardsConfig).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 585                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 586
 587         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 588         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 589
 590         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 591
 592         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 593                 .moduleShardsConfig(moduleShardsConfig).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 594                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 595
 596         AbstractDataStore follower1DistributedDataStore = follower1Node.configDataStore();
 597         follower1DistributedDataStore.waitTillReady();
 598
 599         leaderNode.waitForMembersUp("member-2");
 600         follower1Node.waitForMembersUp("member-1");
 601
 602         DOMEntityOwnershipService follower1EntityOwnershipService = newOwnershipService(follower1DistributedDataStore);
 603
 604         leaderEntityOwnershipService.registerListener(ENTITY_TYPE1, leaderMockListener);
 605
 606         // Register a candidate for follower1 - should get queued since follower1 has no leader
 607         final DOMEntityOwnershipCandidateRegistration candidateReg =
 608                 follower1EntityOwnershipService.registerCandidate(ENTITY1);
 609         Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 610         verify(leaderMockListener, never()).ownershipChanged(ownershipChange(ENTITY1));
 611
 612         // Add replica in follower1
 613         AddShardReplica addReplica = new AddShardReplica(ENTITY_OWNERSHIP_SHARD_NAME);
 614         follower1DistributedDataStore.getActorUtils().getShardManager().tell(addReplica,
 615                 follower1Node.kit().getRef());
 616         Object reply = follower1Node.kit().expectMsgAnyClassOf(follower1Node.kit().duration("5 sec"),
 617                 Success.class, Failure.class);
 618         if (reply instanceof Failure) {
 619             throw new AssertionError("AddShardReplica failed", ((Failure)reply).cause());
 620         }
 621
 622         // The queued candidate registration should proceed
 623         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 624         reset(leaderMockListener);
 625
 626         candidateReg.close();
 627         verify(leaderMockListener, timeout(5000)).ownershipChanged(ownershipChange(ENTITY1, false, false, false));
 628         reset(leaderMockListener);
 629
 630         // Restart follower1 and verify the entity ownership shard is re-instated by registering.
 631         Cluster.get(leaderNode.kit().getSystem()).down(Cluster.get(follower1Node.kit().getSystem()).selfAddress());
 632         follower1Node.cleanup();
 633
 634         follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 635                 .moduleShardsConfig(moduleShardsConfig).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 636                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 637         follower1EntityOwnershipService = newOwnershipService(follower1Node.configDataStore());
 638
 639         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 640         verify(leaderMockListener, timeout(20000)).ownershipChanged(ownershipChange(ENTITY1, false, false, true));
 641
 642         verifyRaftState(follower1Node.configDataStore(), ENTITY_OWNERSHIP_SHARD_NAME, raftState -> {
 643             assertNull("Custom RaftPolicy class name", raftState.getCustomRaftPolicyClassName());
 644             assertEquals("Peer count", 1, raftState.getPeerAddresses().keySet().size());
 645             assertThat("Peer Id", Iterables.<String>getLast(raftState.getPeerAddresses().keySet()),
 646                     org.hamcrest.CoreMatchers.containsString("member-1"));
 647         });
 648     }
 649
 650     @Test
 651     public void testOwnerSelectedOnRapidUnregisteringAndRegisteringOfCandidates() throws Exception {
 652         String name = "testOwnerSelectedOnRapidUnregisteringAndRegisteringOfCandidates";
 653         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 654                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 655                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 656
 657         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 658                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 659                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 660
 661         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 662                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 663                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 664
 665         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 666
 667         leaderDistributedDataStore.waitTillReady();
 668         follower1Node.configDataStore().waitTillReady();
 669         follower2Node.configDataStore().waitTillReady();
 670
 671         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 672         final DOMEntityOwnershipService follower1EntityOwnershipService =
 673                 newOwnershipService(follower1Node.configDataStore());
 674         newOwnershipService(follower2Node.configDataStore());
 675
 676         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 677
 678         // Register leader candidate for entity1 and verify it becomes owner
 679
 680         DOMEntityOwnershipCandidateRegistration leaderEntity1Reg =
 681                 leaderEntityOwnershipService.registerCandidate(ENTITY1);
 682
 683         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-1");
 684         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-1");
 685
 686         leaderEntity1Reg.close();
 687         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 688
 689         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2");
 690         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 691     }
 692
 693     @Test
 694     public void testOwnerSelectedOnRapidRegisteringAndUnregisteringOfCandidates() throws Exception {
 695         String name = "testOwnerSelectedOnRapidRegisteringAndUnregisteringOfCandidates";
 696         MemberNode leaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1").testName(name)
 697                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 698                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 699
 700         MemberNode follower1Node = MemberNode.builder(memberNodes).akkaConfig("Member2").testName(name)
 701                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 702                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 703
 704         MemberNode follower2Node = MemberNode.builder(memberNodes).akkaConfig("Member3").testName(name)
 705                 .moduleShardsConfig(MODULE_SHARDS_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 706                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 707
 708         AbstractDataStore leaderDistributedDataStore = leaderNode.configDataStore();
 709
 710         leaderDistributedDataStore.waitTillReady();
 711         follower1Node.configDataStore().waitTillReady();
 712         follower2Node.configDataStore().waitTillReady();
 713
 714         final DOMEntityOwnershipService leaderEntityOwnershipService = newOwnershipService(leaderDistributedDataStore);
 715         final DOMEntityOwnershipService follower1EntityOwnershipService =
 716                 newOwnershipService(follower1Node.configDataStore());
 717         newOwnershipService(follower2Node.configDataStore());
 718
 719         leaderNode.kit().waitUntilLeader(leaderNode.configDataStore().getActorUtils(), ENTITY_OWNERSHIP_SHARD_NAME);
 720
 721         // Register leader candidate for entity1 and verify it becomes owner
 722
 723         final DOMEntityOwnershipCandidateRegistration leaderEntity1Reg =
 724                 leaderEntityOwnershipService.registerCandidate(ENTITY1);
 725
 726         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-1");
 727         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-1");
 728
 729         follower1EntityOwnershipService.registerCandidate(ENTITY1);
 730         leaderEntity1Reg.close();
 731
 732         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-2");
 733         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-2");
 734     }
 735
 736     @Test
 737     public void testEntityOwnershipWithNonVotingMembers() throws Exception {
 738         followerDatastoreContextBuilder.shardElectionTimeoutFactor(5)
 739                 .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 740
 741         String name = "testEntityOwnershipWithNonVotingMembers";
 742         final MemberNode member1LeaderNode = MemberNode.builder(memberNodes).akkaConfig("Member1")
 743                 .useAkkaArtery(false).testName(name)
 744                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 745                 .createOperDatastore(false).datastoreContextBuilder(leaderDatastoreContextBuilder).build();
 746
 747         final MemberNode member2FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member2")
 748                 .useAkkaArtery(false).testName(name)
 749                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 750                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 751
 752         final MemberNode member3FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member3")
 753                 .useAkkaArtery(false).testName(name)
 754                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 755                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 756
 757         final MemberNode member4FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member4")
 758                 .useAkkaArtery(false).testName(name)
 759                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 760                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 761
 762         final MemberNode member5FollowerNode = MemberNode.builder(memberNodes).akkaConfig("Member5")
 763                 .useAkkaArtery(false).testName(name)
 764                 .moduleShardsConfig(MODULE_SHARDS_5_NODE_CONFIG).schemaContext(EOSTestUtils.SCHEMA_CONTEXT)
 765                 .createOperDatastore(false).datastoreContextBuilder(followerDatastoreContextBuilder).build();
 766
 767         AbstractDataStore leaderDistributedDataStore = member1LeaderNode.configDataStore();
 768
 769         leaderDistributedDataStore.waitTillReady();
 770         member2FollowerNode.configDataStore().waitTillReady();
 771         member3FollowerNode.configDataStore().waitTillReady();
 772         member4FollowerNode.configDataStore().waitTillReady();
 773         member5FollowerNode.configDataStore().waitTillReady();
 774
 775         member1LeaderNode.waitForMembersUp("member-2", "member-3", "member-4", "member-5");
 776
 777         final DOMEntityOwnershipService member3EntityOwnershipService =
 778                 newOwnershipService(member3FollowerNode.configDataStore());
 779         final DOMEntityOwnershipService member4EntityOwnershipService =
 780                 newOwnershipService(member4FollowerNode.configDataStore());
 781         final DOMEntityOwnershipService member5EntityOwnershipService =
 782                 newOwnershipService(member5FollowerNode.configDataStore());
 783
 784         newOwnershipService(member1LeaderNode.configDataStore());
 785         member1LeaderNode.kit().waitUntilLeader(member1LeaderNode.configDataStore().getActorUtils(),
 786                 ENTITY_OWNERSHIP_SHARD_NAME);
 787
 788         // Make member4 and member5 non-voting
 789
 790         Future<Object> future = Patterns.ask(leaderDistributedDataStore.getActorUtils().getShardManager(),
 791                 new ChangeShardMembersVotingStatus(ENTITY_OWNERSHIP_SHARD_NAME,
 792                         ImmutableMap.of("member-4", Boolean.FALSE, "member-5", Boolean.FALSE)),
 793                 new Timeout(10, TimeUnit.SECONDS));
 794         Object response = Await.result(future, FiniteDuration.apply(10, TimeUnit.SECONDS));
 795         if (response instanceof Throwable) {
 796             throw new AssertionError("ChangeShardMembersVotingStatus failed", (Throwable)response);
 797         }
 798
 799         assertNull("Expected null Success response. Actual " + response, response);
 800
 801         // Register member4 candidate for entity1 - it should not become owner since it's non-voting
 802
 803         member4EntityOwnershipService.registerCandidate(ENTITY1);
 804         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-4");
 805
 806         // Register member5 candidate for entity2 - it should not become owner since it's non-voting
 807
 808         member5EntityOwnershipService.registerCandidate(ENTITY2);
 809         verifyCandidates(leaderDistributedDataStore, ENTITY2, "member-5");
 810
 811         Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS);
 812         verifyOwner(leaderDistributedDataStore, ENTITY1, "");
 813         verifyOwner(leaderDistributedDataStore, ENTITY2, "");
 814
 815         // Register member3 candidate for entity1 - it should become owner since it's voting
 816
 817         member3EntityOwnershipService.registerCandidate(ENTITY1);
 818         verifyCandidates(leaderDistributedDataStore, ENTITY1, "member-4", "member-3");
 819         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-3");
 820
 821         // Switch member4 and member5 back to voting and member3 non-voting. This should result in member4 and member5
 822         // to become entity owners.
 823
 824         future = Patterns.ask(leaderDistributedDataStore.getActorUtils().getShardManager(),
 825                 new ChangeShardMembersVotingStatus(ENTITY_OWNERSHIP_SHARD_NAME,
 826                         ImmutableMap.of("member-3", Boolean.FALSE, "member-4", Boolean.TRUE, "member-5", Boolean.TRUE)),
 827                 new Timeout(10, TimeUnit.SECONDS));
 828         response = Await.result(future, FiniteDuration.apply(10, TimeUnit.SECONDS));
 829         if (response instanceof Throwable) {
 830             throw new AssertionError("ChangeShardMembersVotingStatus failed", (Throwable)response);
 831         }
 832
 833         assertNull("Expected null Success response. Actual " + response, response);
 834
 835         verifyOwner(leaderDistributedDataStore, ENTITY1, "member-4");
 836         verifyOwner(leaderDistributedDataStore, ENTITY2, "member-5");
 837     }
 838
 839     private static void verifyGetOwnershipState(final DOMEntityOwnershipService service, final DOMEntity entity,
 840             final EntityOwnershipState expState) {
 841         Optional<EntityOwnershipState> state = service.getOwnershipState(entity);
 842         assertTrue("getOwnershipState present", state.isPresent());
 843         assertEquals("EntityOwnershipState", expState, state.get());
 844     }
 845
 846     private static void verifyCandidates(final AbstractDataStore dataStore, final DOMEntity entity,
 847             final String... expCandidates) throws Exception {
 848         AssertionError lastError = null;
 849         Stopwatch sw = Stopwatch.createStarted();
 850         while (sw.elapsed(TimeUnit.MILLISECONDS) <= 10000) {
 851             Optional<NormalizedNode<?, ?>> possible = dataStore.newReadOnlyTransaction()
 852                     .read(entityPath(entity.getType(), entity.getIdentifier()).node(Candidate.QNAME))
 853                     .get(5, TimeUnit.SECONDS);
 854             try {
 855                 assertTrue("Candidates not found for " + entity, possible.isPresent());
 856                 Collection<String> actual = new ArrayList<>();
 857                 for (MapEntryNode candidate: ((MapNode)possible.get()).getValue()) {
 858                     actual.add(candidate.getChild(CANDIDATE_NAME_NODE_ID).get().getValue().toString());
 859                 }
 860
 861                 assertEquals("Candidates for " + entity, Arrays.asList(expCandidates), actual);
 862                 return;
 863             } catch (AssertionError e) {
 864                 lastError = e;
 865                 Uninterruptibles.sleepUninterruptibly(300, TimeUnit.MILLISECONDS);
 866             }
 867         }
 868
 869         throw lastError;
 870     }
 871
 872     @SuppressWarnings("checkstyle:IllegalCatch")
 873     private static void verifyOwner(final AbstractDataStore dataStore, final DOMEntity entity,
 874             final String expOwner) {
 875         AbstractEntityOwnershipTest.verifyOwner(expOwner, entity.getType(), entity.getIdentifier(), path -> {
 876             try {
 877                 return dataStore.newReadOnlyTransaction().read(path).get(5, TimeUnit.SECONDS).get();
 878             } catch (Exception e) {
 879                 return null;
 880             }
 881         });
 882     }
 883 }