Java tutorial
/* * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.controller.cluster.raft; import static org.junit.Assert.assertArrayEquals; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertNotSame; import static org.junit.Assert.assertNull; import static org.junit.Assert.assertSame; import static org.junit.Assert.assertTrue; import static org.mockito.Matchers.any; import static org.mockito.Matchers.anyObject; import static org.mockito.Matchers.eq; import static org.mockito.Matchers.same; import static org.mockito.Mockito.doReturn; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.never; import static org.mockito.Mockito.reset; import static org.mockito.Mockito.timeout; import static org.mockito.Mockito.verify; import akka.actor.ActorRef; import akka.actor.PoisonPill; import akka.actor.Props; import akka.actor.Status.Failure; import akka.actor.Terminated; import akka.dispatch.Dispatchers; import akka.japi.Procedure; import akka.persistence.SaveSnapshotFailure; import akka.persistence.SaveSnapshotSuccess; import akka.persistence.SnapshotMetadata; import akka.persistence.SnapshotOffer; import akka.testkit.JavaTestKit; import akka.testkit.TestActorRef; import com.google.common.base.Optional; import com.google.common.collect.ImmutableMap; import com.google.common.util.concurrent.Uninterruptibles; import com.google.protobuf.ByteString; import java.io.ByteArrayOutputStream; import java.io.ObjectOutputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit; import java.util.concurrent.TimeoutException; import org.apache.commons.lang3.SerializationUtils; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.mockito.ArgumentCaptor; import org.opendaylight.controller.cluster.DataPersistenceProvider; import org.opendaylight.controller.cluster.NonPersistentDataProvider; import org.opendaylight.controller.cluster.PersistentDataProvider; import org.opendaylight.controller.cluster.notifications.LeaderStateChanged; import org.opendaylight.controller.cluster.notifications.RoleChanged; import org.opendaylight.controller.cluster.raft.MockRaftActorContext.MockPayload; import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot; import org.opendaylight.controller.cluster.raft.base.messages.ApplyState; import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot; import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply; import org.opendaylight.controller.cluster.raft.base.messages.LeaderTransitioning; import org.opendaylight.controller.cluster.raft.base.messages.SendHeartBeat; import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior; import org.opendaylight.controller.cluster.raft.behaviors.Follower; import org.opendaylight.controller.cluster.raft.behaviors.Leader; import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior; import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshot; import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshotReply; import org.opendaylight.controller.cluster.raft.messages.AppendEntries; import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply; import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries; import org.opendaylight.controller.cluster.raft.persisted.DeleteEntries; import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload; import org.opendaylight.controller.cluster.raft.persisted.ServerInfo; import org.opendaylight.controller.cluster.raft.persisted.UpdateElectionTerm; import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy; import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal; import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore; import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor; import org.opendaylight.yangtools.concepts.Identifier; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import scala.concurrent.duration.Duration; import scala.concurrent.duration.FiniteDuration; public class RaftActorTest extends AbstractActorTest { static final Logger TEST_LOG = LoggerFactory.getLogger(RaftActorTest.class); private TestActorFactory factory; @Before public void setUp() { factory = new TestActorFactory(getSystem()); } @After public void tearDown() throws Exception { factory.close(); InMemoryJournal.clear(); InMemorySnapshotStore.clear(); } @Test public void testConstruction() { new RaftActorTestKit(getSystem(), "testConstruction").waitUntilLeader(); } @Test public void testFindLeaderWhenLeaderIsSelf() { RaftActorTestKit kit = new RaftActorTestKit(getSystem(), "testFindLeader"); kit.waitUntilLeader(); } @Test public void testRaftActorRecoveryWithPersistenceEnabled() throws Exception { TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled starting"); new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("follower-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); // Set the heartbeat interval high to essentially disable election otherwise the test // may fail if the actor is switched to Leader and the commitIndex is set to the last // log entry. config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder() .put("member1", "address").build(); ActorRef followerActor = factory .createActor(MockRaftActor.props(persistenceId, peerAddresses, config), persistenceId); watch(followerActor); List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>(); ReplicatedLogEntry entry1 = new MockRaftActorContext.MockReplicatedLogEntry(1, 4, new MockRaftActorContext.MockPayload("E")); snapshotUnappliedEntries.add(entry1); int lastAppliedDuringSnapshotCapture = 3; int lastIndexDuringSnapshotCapture = 4; // 4 messages as part of snapshot, which are applied to state ByteString snapshotBytes = fromObject(Arrays.asList(new MockRaftActorContext.MockPayload("A"), new MockRaftActorContext.MockPayload("B"), new MockRaftActorContext.MockPayload("C"), new MockRaftActorContext.MockPayload("D"))); Snapshot snapshot = Snapshot.create(snapshotBytes.toByteArray(), snapshotUnappliedEntries, lastIndexDuringSnapshotCapture, 1, lastAppliedDuringSnapshotCapture, 1); InMemorySnapshotStore.addSnapshot(persistenceId, snapshot); // add more entries after snapshot is taken List<ReplicatedLogEntry> entries = new ArrayList<>(); ReplicatedLogEntry entry2 = new MockRaftActorContext.MockReplicatedLogEntry(1, 5, new MockRaftActorContext.MockPayload("F", 2)); ReplicatedLogEntry entry3 = new MockRaftActorContext.MockReplicatedLogEntry(1, 6, new MockRaftActorContext.MockPayload("G", 3)); ReplicatedLogEntry entry4 = new MockRaftActorContext.MockReplicatedLogEntry(1, 7, new MockRaftActorContext.MockPayload("H", 4)); entries.add(entry2); entries.add(entry3); entries.add(entry4); int lastAppliedToState = 5; int lastIndex = 7; InMemoryJournal.addEntry(persistenceId, 5, entry2); // 2 entries are applied to state besides the 4 entries in snapshot InMemoryJournal.addEntry(persistenceId, 6, new ApplyJournalEntries(lastAppliedToState)); InMemoryJournal.addEntry(persistenceId, 7, entry3); InMemoryJournal.addEntry(persistenceId, 8, entry4); // kill the actor followerActor.tell(PoisonPill.getInstance(), null); expectMsgClass(duration("5 seconds"), Terminated.class); unwatch(followerActor); //reinstate the actor TestActorRef<MockRaftActor> ref = factory .createTestActor(MockRaftActor.props(persistenceId, peerAddresses, config)); MockRaftActor mockRaftActor = ref.underlyingActor(); mockRaftActor.waitForRecoveryComplete(); RaftActorContext context = mockRaftActor.getRaftActorContext(); assertEquals("Journal log size", snapshotUnappliedEntries.size() + entries.size(), context.getReplicatedLog().size()); assertEquals("Journal data size", 10, context.getReplicatedLog().dataSize()); assertEquals("Last index", lastIndex, context.getReplicatedLog().lastIndex()); assertEquals("Last applied", lastAppliedToState, context.getLastApplied()); assertEquals("Commit index", lastAppliedToState, context.getCommitIndex()); assertEquals("Recovered state size", 6, mockRaftActor.getState().size()); mockRaftActor.waitForInitializeBehaviorComplete(); assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState()); } }; TEST_LOG.info("testRaftActorRecoveryWithPersistenceEnabled ending"); } @Test public void testRaftActorRecoveryWithPersistenceDisabled() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("follower-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef<MockRaftActor> ref = factory.createTestActor(MockRaftActor.props(persistenceId, ImmutableMap.<String, String>builder().put("member1", "address").build(), config, new NonPersistentDataProvider()), persistenceId); MockRaftActor mockRaftActor = ref.underlyingActor(); mockRaftActor.waitForRecoveryComplete(); mockRaftActor.waitForInitializeBehaviorComplete(); assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState()); } }; } @Test public void testUpdateElectionTermPersistedWithPersistenceDisabled() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("follower-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(100, TimeUnit.MILLISECONDS)); config.setElectionTimeoutFactor(1); InMemoryJournal.addWriteMessagesCompleteLatch(persistenceId, 1); TestActorRef<MockRaftActor> ref = factory .createTestActor( MockRaftActor .props(persistenceId, ImmutableMap.<String, String>builder().put("member1", "address") .build(), config, new NonPersistentDataProvider()) .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); InMemoryJournal.waitForWriteMessagesComplete(persistenceId); List<UpdateElectionTerm> entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class); assertEquals("UpdateElectionTerm entries", 1, entries.size()); UpdateElectionTerm updateEntry = entries.get(0); factory.killActor(ref, this); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); ref = factory .createTestActor( MockRaftActor .props(persistenceId, ImmutableMap.<String, String>builder().put("member1", "address") .build(), config, new NonPersistentDataProvider()) .withDispatcher(Dispatchers.DefaultDispatcherId()), factory.generateActorId("follower-")); MockRaftActor actor = ref.underlyingActor(); actor.waitForRecoveryComplete(); RaftActorContext newContext = actor.getRaftActorContext(); assertEquals("electionTerm", updateEntry.getCurrentTerm(), newContext.getTermInformation().getCurrentTerm()); assertEquals("votedFor", updateEntry.getVotedFor(), newContext.getTermInformation().getVotedFor()); entries = InMemoryJournal.get(persistenceId, UpdateElectionTerm.class); assertEquals("UpdateElectionTerm entries", 1, entries.size()); } }; } @Test public void testRaftActorForwardsToRaftActorRecoverySupport() { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, Collections.<String, String>emptyMap(), config), persistenceId); MockRaftActor mockRaftActor = mockActorRef.underlyingActor(); // Wait for akka's recovery to complete so it doesn't interfere. mockRaftActor.waitForRecoveryComplete(); RaftActorRecoverySupport mockSupport = mock(RaftActorRecoverySupport.class); mockRaftActor.setRaftActorRecoverySupport(mockSupport); Snapshot snapshot = Snapshot.create(new byte[] { 1 }, Collections.<ReplicatedLogEntry>emptyList(), 3, 1, 3, 1); SnapshotOffer snapshotOffer = new SnapshotOffer(new SnapshotMetadata("test", 6, 12345), snapshot); mockRaftActor.handleRecover(snapshotOffer); MockRaftActorContext.MockReplicatedLogEntry logEntry = new MockRaftActorContext.MockReplicatedLogEntry(1, 1, new MockRaftActorContext.MockPayload("1", 5)); mockRaftActor.handleRecover(logEntry); ApplyJournalEntries applyJournalEntries = new ApplyJournalEntries(2); mockRaftActor.handleRecover(applyJournalEntries); DeleteEntries deleteEntries = new DeleteEntries(1); mockRaftActor.handleRecover(deleteEntries); UpdateElectionTerm updateElectionTerm = new UpdateElectionTerm(5, "member2"); mockRaftActor.handleRecover(updateElectionTerm); verify(mockSupport).handleRecoveryMessage(same(snapshotOffer), any(PersistentDataProvider.class)); verify(mockSupport).handleRecoveryMessage(same(logEntry), any(PersistentDataProvider.class)); verify(mockSupport).handleRecoveryMessage(same(applyJournalEntries), any(PersistentDataProvider.class)); verify(mockSupport).handleRecoveryMessage(same(deleteEntries), any(PersistentDataProvider.class)); verify(mockSupport).handleRecoveryMessage(same(updateElectionTerm), any(PersistentDataProvider.class)); } @Test public void testRaftActorForwardsToRaftActorSnapshotMessageSupport() { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); RaftActorSnapshotMessageSupport mockSupport = mock(RaftActorSnapshotMessageSupport.class); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId) .config(config).snapshotMessageSupport(mockSupport).props()); MockRaftActor mockRaftActor = mockActorRef.underlyingActor(); // Wait for akka's recovery to complete so it doesn't interfere. mockRaftActor.waitForRecoveryComplete(); ApplySnapshot applySnapshot = new ApplySnapshot(mock(Snapshot.class)); doReturn(true).when(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class)); mockRaftActor.handleCommand(applySnapshot); CaptureSnapshot captureSnapshot = new CaptureSnapshot(1, 1, 1, 1, 0, 1, null); doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class)); mockRaftActor.handleCommand(captureSnapshot); CaptureSnapshotReply captureSnapshotReply = new CaptureSnapshotReply(new byte[0]); doReturn(true).when(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class)); mockRaftActor.handleCommand(captureSnapshotReply); SaveSnapshotSuccess saveSnapshotSuccess = new SaveSnapshotSuccess(new SnapshotMetadata("", 0L, 0L)); doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class)); mockRaftActor.handleCommand(saveSnapshotSuccess); SaveSnapshotFailure saveSnapshotFailure = new SaveSnapshotFailure(new SnapshotMetadata("", 0L, 0L), new Throwable()); doReturn(true).when(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class)); mockRaftActor.handleCommand(saveSnapshotFailure); doReturn(true).when(mockSupport) .handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT), any(ActorRef.class)); mockRaftActor.handleCommand(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT); doReturn(true).when(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class)); mockRaftActor.handleCommand(GetSnapshot.INSTANCE); verify(mockSupport).handleSnapshotMessage(same(applySnapshot), any(ActorRef.class)); verify(mockSupport).handleSnapshotMessage(same(captureSnapshot), any(ActorRef.class)); verify(mockSupport).handleSnapshotMessage(same(captureSnapshotReply), any(ActorRef.class)); verify(mockSupport).handleSnapshotMessage(same(saveSnapshotSuccess), any(ActorRef.class)); verify(mockSupport).handleSnapshotMessage(same(saveSnapshotFailure), any(ActorRef.class)); verify(mockSupport).handleSnapshotMessage(same(RaftActorSnapshotMessageSupport.COMMIT_SNAPSHOT), any(ActorRef.class)); verify(mockSupport).handleSnapshotMessage(same(GetSnapshot.INSTANCE), any(ActorRef.class)); } @Test public void testApplyJournalEntriesCallsDataPersistence() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class); TestActorRef<MockRaftActor> mockActorRef = factory .createTestActor(MockRaftActor.props(persistenceId, Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId); MockRaftActor mockRaftActor = mockActorRef.underlyingActor(); mockRaftActor.waitForInitializeBehaviorComplete(); mockRaftActor.waitUntilLeader(); mockRaftActor.onReceiveCommand(new ApplyJournalEntries(10)); verify(dataPersistenceProvider).persist(any(ApplyJournalEntries.class), any(Procedure.class)); } }; } @Test public void testApplyState() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class); TestActorRef<MockRaftActor> mockActorRef = factory .createTestActor(MockRaftActor.props(persistenceId, Collections.<String, String>emptyMap(), config, dataPersistenceProvider), persistenceId); MockRaftActor mockRaftActor = mockActorRef.underlyingActor(); mockRaftActor.waitForInitializeBehaviorComplete(); ReplicatedLogEntry entry = new MockRaftActorContext.MockReplicatedLogEntry(1, 5, new MockRaftActorContext.MockPayload("F")); final Identifier id = new MockIdentifier("apply-state"); mockRaftActor.onReceiveCommand(new ApplyState(mockActorRef, id, entry)); verify(mockRaftActor.actorDelegate).applyState(eq(mockActorRef), eq(id), anyObject()); } }; } @Test public void testRaftRoleChangeNotifierWhenRaftActorHasNoPeers() throws Exception { new JavaTestKit(getSystem()) { { TestActorRef<MessageCollectorActor> notifierActor = factory .createTestActor(Props.create(MessageCollectorActor.class)); MessageCollectorActor.waitUntilReady(notifierActor); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); long heartBeatInterval = 100; config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS)); config.setElectionTimeoutFactor(20); String persistenceId = factory.generateActorId("notifier-"); TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor( MockRaftActor.builder().id(persistenceId).config(config).roleChangeNotifier(notifierActor) .dataPersistenceProvider(new NonPersistentDataProvider()).props() .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); List<RoleChanged> matches = MessageCollectorActor.expectMatching(notifierActor, RoleChanged.class, 3); // check if the notifier got a role change from null to Follower RoleChanged raftRoleChanged = matches.get(0); assertEquals(persistenceId, raftRoleChanged.getMemberId()); assertNull(raftRoleChanged.getOldRole()); assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole()); // check if the notifier got a role change from Follower to Candidate raftRoleChanged = matches.get(1); assertEquals(persistenceId, raftRoleChanged.getMemberId()); assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole()); assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole()); // check if the notifier got a role change from Candidate to Leader raftRoleChanged = matches.get(2); assertEquals(persistenceId, raftRoleChanged.getMemberId()); assertEquals(RaftState.Candidate.name(), raftRoleChanged.getOldRole()); assertEquals(RaftState.Leader.name(), raftRoleChanged.getNewRole()); LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class); assertEquals(raftRoleChanged.getMemberId(), leaderStateChange.getLeaderId()); assertEquals(MockRaftActor.PAYLOAD_VERSION, leaderStateChange.getLeaderPayloadVersion()); notifierActor.underlyingActor().clear(); MockRaftActor raftActor = raftActorRef.underlyingActor(); final String newLeaderId = "new-leader"; final short newLeaderVersion = 6; Follower follower = new Follower(raftActor.getRaftActorContext()) { @Override public RaftActorBehavior handleMessage(ActorRef sender, Object message) { setLeaderId(newLeaderId); setLeaderPayloadVersion(newLeaderVersion); return this; } }; raftActor.newBehavior(follower); leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class); assertEquals(persistenceId, leaderStateChange.getMemberId()); assertEquals(null, leaderStateChange.getLeaderId()); raftRoleChanged = MessageCollectorActor.expectFirstMatching(notifierActor, RoleChanged.class); assertEquals(RaftState.Leader.name(), raftRoleChanged.getOldRole()); assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole()); notifierActor.underlyingActor().clear(); raftActor.handleCommand("any"); leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class); assertEquals(persistenceId, leaderStateChange.getMemberId()); assertEquals(newLeaderId, leaderStateChange.getLeaderId()); assertEquals(newLeaderVersion, leaderStateChange.getLeaderPayloadVersion()); notifierActor.underlyingActor().clear(); raftActor.handleCommand("any"); Uninterruptibles.sleepUninterruptibly(505, TimeUnit.MILLISECONDS); leaderStateChange = MessageCollectorActor.getFirstMatching(notifierActor, LeaderStateChanged.class); assertNull(leaderStateChange); } }; } @Test public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception { new JavaTestKit(getSystem()) { { ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class)); MessageCollectorActor.waitUntilReady(notifierActor); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); long heartBeatInterval = 100; config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS)); config.setElectionTimeoutFactor(1); String persistenceId = factory.generateActorId("notifier-"); factory.createActor(MockRaftActor.builder().id(persistenceId) .peerAddresses(ImmutableMap.of("leader", "fake/path")).config(config) .roleChangeNotifier(notifierActor).props()); List<RoleChanged> matches = null; for (int i = 0; i < 5000 / heartBeatInterval; i++) { matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class); assertNotNull(matches); if (matches.size() == 3) { break; } Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS); } assertNotNull(matches); assertEquals(2, matches.size()); // check if the notifier got a role change from null to Follower RoleChanged raftRoleChanged = matches.get(0); assertEquals(persistenceId, raftRoleChanged.getMemberId()); assertNull(raftRoleChanged.getOldRole()); assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole()); // check if the notifier got a role change from Follower to Candidate raftRoleChanged = matches.get(1); assertEquals(persistenceId, raftRoleChanged.getMemberId()); assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole()); assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole()); } }; } @Test public void testFakeSnapshotsForLeaderWithInRealSnapshots() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("leader-"); String follower1Id = factory.generateActorId("follower-"); ActorRef followerActor1 = factory.createActor(Props.create(MessageCollectorActor.class)); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS)); DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class); Map<String, String> peerAddresses = new HashMap<>(); peerAddresses.put(follower1Id, followerActor1.path().toString()); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId); MockRaftActor leaderActor = mockActorRef.underlyingActor(); leaderActor.getRaftActorContext().setCommitIndex(4); leaderActor.getRaftActorContext().setLastApplied(4); leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId); leaderActor.waitForInitializeBehaviorComplete(); // create 8 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot Leader leader = new Leader(leaderActor.getRaftActorContext()); leaderActor.setCurrentBehavior(leader); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder(); leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 8, 1).build()); assertEquals(8, leaderActor.getReplicatedLog().size()); leaderActor.getRaftActorContext().getSnapshotManager() .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 6, new MockRaftActorContext.MockPayload("x")), 4); verify(leaderActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class)); assertEquals(8, leaderActor.getReplicatedLog().size()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); //fake snapshot on index 5 leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 5, 1, (short) 0)); assertEquals(8, leaderActor.getReplicatedLog().size()); //fake snapshot on index 6 assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 6, 1, (short) 0)); assertEquals(8, leaderActor.getReplicatedLog().size()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); assertEquals(8, leaderActor.getReplicatedLog().size()); ByteString snapshotBytes = fromObject(Arrays.asList(new MockRaftActorContext.MockPayload("foo-0"), new MockRaftActorContext.MockPayload("foo-1"), new MockRaftActorContext.MockPayload("foo-2"), new MockRaftActorContext.MockPayload("foo-3"), new MockRaftActorContext.MockPayload("foo-4"))); leaderActor.getRaftActorContext().getSnapshotManager().persist(snapshotBytes.toByteArray(), Runtime.getRuntime().totalMemory()); assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing()); // The commit is needed to complete the snapshot creation process leaderActor.getRaftActorContext().getSnapshotManager().commit(-1, -1); // capture snapshot reply should remove the snapshotted entries only assertEquals(3, leaderActor.getReplicatedLog().size()); assertEquals(7, leaderActor.getReplicatedLog().lastIndex()); // add another non-replicated entry leaderActor.getReplicatedLog() .append(new ReplicatedLogImplEntry(8, 1, new MockRaftActorContext.MockPayload("foo-8"))); //fake snapshot on index 7, since lastApplied = 7 , we would keep the last applied leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 7, 1, (short) 0)); assertEquals(2, leaderActor.getReplicatedLog().size()); assertEquals(8, leaderActor.getReplicatedLog().lastIndex()); } }; } @Test public void testFakeSnapshotsForFollowerWithInRealSnapshots() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("follower-"); String leaderId = factory.generateActorId("leader-"); ActorRef leaderActor1 = factory.createActor(Props.create(MessageCollectorActor.class)); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS)); DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class); Map<String, String> peerAddresses = new HashMap<>(); peerAddresses.put(leaderId, leaderActor1.path().toString()); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId); MockRaftActor followerActor = mockActorRef.underlyingActor(); followerActor.getRaftActorContext().setCommitIndex(4); followerActor.getRaftActorContext().setLastApplied(4); followerActor.getRaftActorContext().getTermInformation().update(1, persistenceId); followerActor.waitForInitializeBehaviorComplete(); Follower follower = new Follower(followerActor.getRaftActorContext()); followerActor.setCurrentBehavior(follower); assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state()); // create 6 entries in the log - 0 to 4 are applied and will get picked up as part of the capture snapshot MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder(); followerActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(0, 6, 1).build()); // log has indices 0-5 assertEquals(6, followerActor.getReplicatedLog().size()); //snapshot on 4 followerActor.getRaftActorContext().getSnapshotManager() .capture(new MockRaftActorContext.MockReplicatedLogEntry(1, 5, new MockRaftActorContext.MockPayload("D")), 4); verify(followerActor.snapshotCohortDelegate).createSnapshot(any(ActorRef.class)); assertEquals(6, followerActor.getReplicatedLog().size()); //fake snapshot on index 6 List<ReplicatedLogEntry> entries = Arrays .asList((ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 6, new MockRaftActorContext.MockPayload("foo-6"))); followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 5, 1, entries, 5, 5, (short) 0)); assertEquals(7, followerActor.getReplicatedLog().size()); //fake snapshot on index 7 assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state()); entries = Arrays.asList((ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 7, new MockRaftActorContext.MockPayload("foo-7"))); followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 6, 1, entries, 6, 6, (short) 0)); assertEquals(8, followerActor.getReplicatedLog().size()); assertEquals(RaftState.Follower, followerActor.getCurrentBehavior().state()); ByteString snapshotBytes = fromObject(Arrays.asList(new MockRaftActorContext.MockPayload("foo-0"), new MockRaftActorContext.MockPayload("foo-1"), new MockRaftActorContext.MockPayload("foo-2"), new MockRaftActorContext.MockPayload("foo-3"), new MockRaftActorContext.MockPayload("foo-4"))); followerActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray())); assertTrue(followerActor.getRaftActorContext().getSnapshotManager().isCapturing()); // The commit is needed to complete the snapshot creation process followerActor.getRaftActorContext().getSnapshotManager().commit(-1, -1); // capture snapshot reply should remove the snapshotted entries only till replicatedToAllIndex assertEquals(3, followerActor.getReplicatedLog().size()); //indexes 5,6,7 left in the log assertEquals(7, followerActor.getReplicatedLog().lastIndex()); entries = Arrays.asList((ReplicatedLogEntry) new MockRaftActorContext.MockReplicatedLogEntry(1, 8, new MockRaftActorContext.MockPayload("foo-7"))); // send an additional entry 8 with leaderCommit = 7 followerActor.onReceiveCommand(new AppendEntries(1, leaderId, 7, 1, entries, 7, 7, (short) 0)); // 7 and 8, as lastapplied is 7 assertEquals(2, followerActor.getReplicatedLog().size()); } }; } @Test public void testFakeSnapshotsForLeaderWithInInitiateSnapshots() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("leader-"); String follower1Id = factory.generateActorId("follower-"); String follower2Id = factory.generateActorId("follower-"); ActorRef followerActor1 = factory.createActor(Props.create(MessageCollectorActor.class), follower1Id); ActorRef followerActor2 = factory.createActor(Props.create(MessageCollectorActor.class), follower2Id); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS)); DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class); Map<String, String> peerAddresses = new HashMap<>(); peerAddresses.put(follower1Id, followerActor1.path().toString()); peerAddresses.put(follower2Id, followerActor2.path().toString()); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId); MockRaftActor leaderActor = mockActorRef.underlyingActor(); leaderActor.getRaftActorContext().setCommitIndex(9); leaderActor.getRaftActorContext().setLastApplied(9); leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId); leaderActor.waitForInitializeBehaviorComplete(); Leader leader = new Leader(leaderActor.getRaftActorContext()); leaderActor.setCurrentBehavior(leader); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); // create 5 entries in the log MockRaftActorContext.MockReplicatedLogBuilder logBuilder = new MockRaftActorContext.MockReplicatedLogBuilder(); leaderActor.getRaftActorContext().setReplicatedLog(logBuilder.createEntries(5, 10, 1).build()); //set the snapshot index to 4 , 0 to 4 are snapshotted leaderActor.getRaftActorContext().getReplicatedLog().setSnapshotIndex(4); //setting replicatedToAllIndex = 9, for the log to clear leader.setReplicatedToAllIndex(9); assertEquals(5, leaderActor.getReplicatedLog().size()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); leaderActor.onReceiveCommand(new AppendEntriesReply(follower1Id, 1, true, 9, 1, (short) 0)); assertEquals(5, leaderActor.getReplicatedLog().size()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); // set the 2nd follower nextIndex to 1 which has been snapshotted leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 0, 1, (short) 0)); assertEquals(5, leaderActor.getReplicatedLog().size()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); // simulate a real snapshot leaderActor.onReceiveCommand(SendHeartBeat.INSTANCE); assertEquals(5, leaderActor.getReplicatedLog().size()); assertEquals( String.format("expected to be Leader but was %s. Current Leader = %s ", leaderActor.getCurrentBehavior().state(), leaderActor.getLeaderId()), RaftState.Leader, leaderActor.getCurrentBehavior().state()); //reply from a slow follower does not initiate a fake snapshot leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 9, 1, (short) 0)); assertEquals("Fake snapshot should not happen when Initiate is in progress", 5, leaderActor.getReplicatedLog().size()); ByteString snapshotBytes = fromObject(Arrays.asList(new MockRaftActorContext.MockPayload("foo-0"), new MockRaftActorContext.MockPayload("foo-1"), new MockRaftActorContext.MockPayload("foo-2"), new MockRaftActorContext.MockPayload("foo-3"), new MockRaftActorContext.MockPayload("foo-4"))); leaderActor.onReceiveCommand(new CaptureSnapshotReply(snapshotBytes.toByteArray())); assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing()); assertEquals("Real snapshot didn't clear the log till replicatedToAllIndex", 0, leaderActor.getReplicatedLog().size()); //reply from a slow follower after should not raise errors leaderActor.onReceiveCommand(new AppendEntriesReply(follower2Id, 1, true, 5, 1, (short) 0)); assertEquals(0, leaderActor.getReplicatedLog().size()); } }; } @Test public void testRealSnapshotWhenReplicatedToAllIndexMinusOne() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setSnapshotBatchCount(5); DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider(); Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address") .build(); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId); MockRaftActor leaderActor = mockActorRef.underlyingActor(); leaderActor.getRaftActorContext().setCommitIndex(3); leaderActor.getRaftActorContext().setLastApplied(3); leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId); leaderActor.waitForInitializeBehaviorComplete(); for (int i = 0; i < 4; i++) { leaderActor.getReplicatedLog().append(new MockRaftActorContext.MockReplicatedLogEntry(1, i, new MockRaftActorContext.MockPayload("A"))); } Leader leader = new Leader(leaderActor.getRaftActorContext()); leaderActor.setCurrentBehavior(leader); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); // Simulate an install snaphost to a follower. leaderActor.getRaftActorContext().getSnapshotManager() .captureToInstall(leaderActor.getReplicatedLog().last(), -1, "member1"); // Now send a CaptureSnapshotReply mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef); // Trimming log in this scenario is a no-op assertEquals(-1, leaderActor.getReplicatedLog().getSnapshotIndex()); assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing()); assertEquals(-1, leader.getReplicatedToAllIndex()); } }; } @Test public void testRealSnapshotWhenReplicatedToAllIndexNotInReplicatedLog() throws Exception { new JavaTestKit(getSystem()) { { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setSnapshotBatchCount(5); DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider(); Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().put("member1", "address") .build(); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId); MockRaftActor leaderActor = mockActorRef.underlyingActor(); leaderActor.getRaftActorContext().setCommitIndex(3); leaderActor.getRaftActorContext().setLastApplied(3); leaderActor.getRaftActorContext().getTermInformation().update(1, persistenceId); leaderActor.getReplicatedLog().setSnapshotIndex(3); leaderActor.waitForInitializeBehaviorComplete(); Leader leader = new Leader(leaderActor.getRaftActorContext()); leaderActor.setCurrentBehavior(leader); leader.setReplicatedToAllIndex(3); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); // Persist another entry (this will cause a CaptureSnapshot to be triggered leaderActor.persistData(mockActorRef, new MockIdentifier("x"), new MockRaftActorContext.MockPayload("duh")); // Now send a CaptureSnapshotReply mockActorRef.tell(new CaptureSnapshotReply(fromObject("foo").toByteArray()), mockActorRef); // Trimming log in this scenario is a no-op assertEquals(3, leaderActor.getReplicatedLog().getSnapshotIndex()); assertTrue(leaderActor.getRaftActorContext().getSnapshotManager().isCapturing()); assertEquals(3, leader.getReplicatedToAllIndex()); } }; } @Test public void testSwitchBehavior() { String persistenceId = factory.generateActorId("leader-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setCustomRaftPolicyImplementationClass( "org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy"); config.setHeartBeatInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setIsolatedLeaderCheckInterval(new FiniteDuration(1, TimeUnit.DAYS)); config.setSnapshotBatchCount(5); DataPersistenceProvider dataPersistenceProvider = new NonPersistentDataProvider(); Map<String, String> peerAddresses = ImmutableMap.<String, String>builder().build(); TestActorRef<MockRaftActor> mockActorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, config, dataPersistenceProvider), persistenceId); MockRaftActor leaderActor = mockActorRef.underlyingActor(); leaderActor.waitForRecoveryComplete(); leaderActor.handleCommand(new SwitchBehavior(RaftState.Follower, 100)); assertEquals(100, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm()); assertEquals(RaftState.Follower, leaderActor.getCurrentBehavior().state()); leaderActor.handleCommand(new SwitchBehavior(RaftState.Leader, 110)); assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); leaderActor.handleCommand(new SwitchBehavior(RaftState.Candidate, 125)); assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); leaderActor.handleCommand(new SwitchBehavior(RaftState.IsolatedLeader, 125)); assertEquals(110, leaderActor.getRaftActorContext().getTermInformation().getCurrentTerm()); assertEquals(RaftState.Leader, leaderActor.getCurrentBehavior().state()); } public static ByteString fromObject(Object snapshot) throws Exception { ByteArrayOutputStream b = null; ObjectOutputStream o = null; try { b = new ByteArrayOutputStream(); o = new ObjectOutputStream(b); o.writeObject(snapshot); byte[] snapshotBytes = b.toByteArray(); return ByteString.copyFrom(snapshotBytes); } finally { if (o != null) { o.flush(); o.close(); } if (b != null) { b.close(); } } } @Test public void testUpdateConfigParam() throws Exception { DefaultConfigParamsImpl emptyConfig = new DefaultConfigParamsImpl(); String persistenceId = factory.generateActorId("follower-"); ImmutableMap<String, String> peerAddresses = ImmutableMap.<String, String>builder() .put("member1", "address").build(); DataPersistenceProvider dataPersistenceProvider = mock(DataPersistenceProvider.class); TestActorRef<MockRaftActor> actorRef = factory.createTestActor( MockRaftActor.props(persistenceId, peerAddresses, emptyConfig, dataPersistenceProvider), persistenceId); MockRaftActor mockRaftActor = actorRef.underlyingActor(); mockRaftActor.waitForInitializeBehaviorComplete(); RaftActorBehavior behavior = mockRaftActor.getCurrentBehavior(); mockRaftActor.updateConfigParams(emptyConfig); assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior()); assertEquals("Behavior State", RaftState.Follower, mockRaftActor.getCurrentBehavior().state()); DefaultConfigParamsImpl disableConfig = new DefaultConfigParamsImpl(); disableConfig.setCustomRaftPolicyImplementationClass( "org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy"); mockRaftActor.updateConfigParams(disableConfig); assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior()); assertEquals("Behavior State", RaftState.Follower, mockRaftActor.getCurrentBehavior().state()); behavior = mockRaftActor.getCurrentBehavior(); mockRaftActor.updateConfigParams(disableConfig); assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior()); assertEquals("Behavior State", RaftState.Follower, mockRaftActor.getCurrentBehavior().state()); DefaultConfigParamsImpl defaultConfig = new DefaultConfigParamsImpl(); defaultConfig.setCustomRaftPolicyImplementationClass( "org.opendaylight.controller.cluster.raft.policy.DefaultRaftPolicy"); mockRaftActor.updateConfigParams(defaultConfig); assertNotSame("Different Behavior", behavior, mockRaftActor.getCurrentBehavior()); assertEquals("Behavior State", RaftState.Follower, mockRaftActor.getCurrentBehavior().state()); behavior = mockRaftActor.getCurrentBehavior(); mockRaftActor.updateConfigParams(defaultConfig); assertSame("Same Behavior", behavior, mockRaftActor.getCurrentBehavior()); assertEquals("Behavior State", RaftState.Follower, mockRaftActor.getCurrentBehavior().state()); } @Test public void testGetSnapshot() throws Exception { TEST_LOG.info("testGetSnapshot starting"); JavaTestKit kit = new JavaTestKit(getSystem()); String persistenceId = factory.generateActorId("test-actor-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); long term = 3; long seqN = 1; InMemoryJournal.addEntry(persistenceId, seqN++, new UpdateElectionTerm(term, "member-1")); InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 0, new MockRaftActorContext.MockPayload("A"))); InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 1, new MockRaftActorContext.MockPayload("B"))); InMemoryJournal.addEntry(persistenceId, seqN++, new ApplyJournalEntries(1)); InMemoryJournal.addEntry(persistenceId, seqN++, new MockRaftActorContext.MockReplicatedLogEntry(term, 2, new MockRaftActorContext.MockPayload("C"))); TestActorRef<MockRaftActor> raftActorRef = factory .createTestActor(MockRaftActor .props(persistenceId, ImmutableMap.<String, String>builder().put("member1", "address").build(), config) .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); MockRaftActor mockRaftActor = raftActorRef.underlyingActor(); mockRaftActor.waitForRecoveryComplete(); mockRaftActor.snapshotCohortDelegate = mock(RaftActorSnapshotCohort.class); raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef()); ArgumentCaptor<ActorRef> replyActor = ArgumentCaptor.forClass(ActorRef.class); verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).createSnapshot(replyActor.capture()); byte[] stateSnapshot = new byte[] { 1, 2, 3 }; replyActor.getValue().tell(new CaptureSnapshotReply(stateSnapshot), ActorRef.noSender()); GetSnapshotReply reply = kit.expectMsgClass(GetSnapshotReply.class); assertEquals("getId", persistenceId, reply.getId()); Snapshot replySnapshot = SerializationUtils.deserialize(reply.getSnapshot()); assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm()); assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor()); assertEquals("getLastAppliedIndex", 1L, replySnapshot.getLastAppliedIndex()); assertEquals("getLastAppliedTerm", term, replySnapshot.getLastAppliedTerm()); assertEquals("getLastIndex", 2L, replySnapshot.getLastIndex()); assertEquals("getLastTerm", term, replySnapshot.getLastTerm()); assertArrayEquals("getState", stateSnapshot, replySnapshot.getState()); assertEquals("getUnAppliedEntries size", 1, replySnapshot.getUnAppliedEntries().size()); assertEquals("UnApplied entry index ", 2L, replySnapshot.getUnAppliedEntries().get(0).getIndex()); // Test with timeout mockRaftActor.getSnapshotMessageSupport() .setSnapshotReplyActorTimeout(Duration.create(200, TimeUnit.MILLISECONDS)); reset(mockRaftActor.snapshotCohortDelegate); raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef()); Failure failure = kit.expectMsgClass(akka.actor.Status.Failure.class); assertEquals("Failure cause type", TimeoutException.class, failure.cause().getClass()); mockRaftActor.getSnapshotMessageSupport() .setSnapshotReplyActorTimeout(Duration.create(30, TimeUnit.SECONDS)); // Test with persistence disabled. mockRaftActor.setPersistence(false); reset(mockRaftActor.snapshotCohortDelegate); raftActorRef.tell(GetSnapshot.INSTANCE, kit.getRef()); reply = kit.expectMsgClass(GetSnapshotReply.class); verify(mockRaftActor.snapshotCohortDelegate, never()).createSnapshot(any(ActorRef.class)); assertEquals("getId", persistenceId, reply.getId()); replySnapshot = SerializationUtils.deserialize(reply.getSnapshot()); assertEquals("getElectionTerm", term, replySnapshot.getElectionTerm()); assertEquals("getElectionVotedFor", "member-1", replySnapshot.getElectionVotedFor()); assertEquals("getLastAppliedIndex", -1L, replySnapshot.getLastAppliedIndex()); assertEquals("getLastAppliedTerm", -1L, replySnapshot.getLastAppliedTerm()); assertEquals("getLastIndex", -1L, replySnapshot.getLastIndex()); assertEquals("getLastTerm", -1L, replySnapshot.getLastTerm()); assertEquals("getState length", 0, replySnapshot.getState().length); assertEquals("getUnAppliedEntries size", 0, replySnapshot.getUnAppliedEntries().size()); TEST_LOG.info("testGetSnapshot ending"); } @Test public void testRestoreFromSnapshot() throws Exception { TEST_LOG.info("testRestoreFromSnapshot starting"); String persistenceId = factory.generateActorId("test-actor-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); List<ReplicatedLogEntry> snapshotUnappliedEntries = new ArrayList<>(); snapshotUnappliedEntries.add( new MockRaftActorContext.MockReplicatedLogEntry(1, 4, new MockRaftActorContext.MockPayload("E"))); int snapshotLastApplied = 3; int snapshotLastIndex = 4; List<MockPayload> state = Arrays.asList(new MockRaftActorContext.MockPayload("A"), new MockRaftActorContext.MockPayload("B"), new MockRaftActorContext.MockPayload("C"), new MockRaftActorContext.MockPayload("D")); ByteString stateBytes = fromObject(state); Snapshot snapshot = Snapshot.create(stateBytes.toByteArray(), snapshotUnappliedEntries, snapshotLastIndex, 1, snapshotLastApplied, 1, 1, "member-1"); InMemorySnapshotStore.addSnapshotSavedLatch(persistenceId); TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId) .config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props() .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); MockRaftActor mockRaftActor = raftActorRef.underlyingActor(); mockRaftActor.waitForRecoveryComplete(); Snapshot savedSnapshot = InMemorySnapshotStore.waitForSavedSnapshot(persistenceId, Snapshot.class); assertEquals("getElectionTerm", snapshot.getElectionTerm(), savedSnapshot.getElectionTerm()); assertEquals("getElectionVotedFor", snapshot.getElectionVotedFor(), savedSnapshot.getElectionVotedFor()); assertEquals("getLastAppliedIndex", snapshot.getLastAppliedIndex(), savedSnapshot.getLastAppliedIndex()); assertEquals("getLastAppliedTerm", snapshot.getLastAppliedTerm(), savedSnapshot.getLastAppliedTerm()); assertEquals("getLastIndex", snapshot.getLastIndex(), savedSnapshot.getLastIndex()); assertEquals("getLastTerm", snapshot.getLastTerm(), savedSnapshot.getLastTerm()); assertArrayEquals("getState", snapshot.getState(), savedSnapshot.getState()); assertEquals("getUnAppliedEntries", snapshot.getUnAppliedEntries(), savedSnapshot.getUnAppliedEntries()); verify(mockRaftActor.snapshotCohortDelegate, timeout(5000)).applySnapshot(any(byte[].class)); RaftActorContext context = mockRaftActor.getRaftActorContext(); assertEquals("Journal log size", 1, context.getReplicatedLog().size()); assertEquals("Last index", snapshotLastIndex, context.getReplicatedLog().lastIndex()); assertEquals("Last applied", snapshotLastApplied, context.getLastApplied()); assertEquals("Commit index", snapshotLastApplied, context.getCommitIndex()); assertEquals("Recovered state", state, mockRaftActor.getState()); assertEquals("Current term", 1L, context.getTermInformation().getCurrentTerm()); assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor()); // Test with data persistence disabled snapshot = Snapshot.create(new byte[0], Collections.<ReplicatedLogEntry>emptyList(), -1, -1, -1, -1, 5, "member-1"); persistenceId = factory.generateActorId("test-actor-"); raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId).config(config) .restoreFromSnapshot(SerializationUtils.serialize(snapshot)).persistent(Optional.of(Boolean.FALSE)) .props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); mockRaftActor = raftActorRef.underlyingActor(); mockRaftActor.waitForRecoveryComplete(); assertEquals("snapshot committed", true, Uninterruptibles.awaitUninterruptibly(mockRaftActor.snapshotCommitted, 5, TimeUnit.SECONDS)); context = mockRaftActor.getRaftActorContext(); assertEquals("Current term", 5L, context.getTermInformation().getCurrentTerm()); assertEquals("Voted for", "member-1", context.getTermInformation().getVotedFor()); TEST_LOG.info("testRestoreFromSnapshot ending"); } @Test public void testRestoreFromSnapshotWithRecoveredData() throws Exception { TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData starting"); String persistenceId = factory.generateActorId("test-actor-"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); List<MockPayload> state = Arrays.asList(new MockRaftActorContext.MockPayload("A")); Snapshot snapshot = Snapshot.create(fromObject(state).toByteArray(), Arrays.<ReplicatedLogEntry>asList(), 5, 2, 5, 2, 2, "member-1"); InMemoryJournal.addEntry(persistenceId, 1, new MockRaftActorContext.MockReplicatedLogEntry(1, 0, new MockRaftActorContext.MockPayload("B"))); TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId) .config(config).restoreFromSnapshot(SerializationUtils.serialize(snapshot)).props() .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); MockRaftActor mockRaftActor = raftActorRef.underlyingActor(); mockRaftActor.waitForRecoveryComplete(); Uninterruptibles.sleepUninterruptibly(500, TimeUnit.MILLISECONDS); verify(mockRaftActor.snapshotCohortDelegate, never()).applySnapshot(any(byte[].class)); RaftActorContext context = mockRaftActor.getRaftActorContext(); assertEquals("Journal log size", 1, context.getReplicatedLog().size()); assertEquals("Last index", 0, context.getReplicatedLog().lastIndex()); assertEquals("Last applied", -1, context.getLastApplied()); assertEquals("Commit index", -1, context.getCommitIndex()); assertEquals("Current term", 0, context.getTermInformation().getCurrentTerm()); assertEquals("Voted for", null, context.getTermInformation().getVotedFor()); TEST_LOG.info("testRestoreFromSnapshotWithRecoveredData ending"); } @Test public void testNonVotingOnRecovery() throws Exception { TEST_LOG.info("testNonVotingOnRecovery starting"); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setElectionTimeoutFactor(1); config.setHeartBeatInterval(FiniteDuration.create(1, TimeUnit.MILLISECONDS)); String persistenceId = factory.generateActorId("test-actor-"); InMemoryJournal.addEntry(persistenceId, 1, new MockRaftActorContext.MockReplicatedLogEntry(1, 0, new ServerConfigurationPayload(Arrays.asList(new ServerInfo(persistenceId, false))))); TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor(MockRaftActor.builder().id(persistenceId) .config(config).props().withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); MockRaftActor mockRaftActor = raftActorRef.underlyingActor(); mockRaftActor.waitForInitializeBehaviorComplete(); // Sleep a bit and verify it didn't get an election timeout and schedule an election. Uninterruptibles.sleepUninterruptibly(400, TimeUnit.MILLISECONDS); assertEquals("getRaftState", RaftState.Follower, mockRaftActor.getRaftState()); TEST_LOG.info("testNonVotingOnRecovery ending"); } @Test public void testLeaderTransitioning() throws Exception { TEST_LOG.info("testLeaderTransitioning starting"); TestActorRef<MessageCollectorActor> notifierActor = factory .createTestActor(Props.create(MessageCollectorActor.class)); DefaultConfigParamsImpl config = new DefaultConfigParamsImpl(); config.setCustomRaftPolicyImplementationClass(DisableElectionsRaftPolicy.class.getName()); String persistenceId = factory.generateActorId("test-actor-"); TestActorRef<MockRaftActor> raftActorRef = factory.createTestActor( MockRaftActor.builder().id(persistenceId).config(config).roleChangeNotifier(notifierActor).props() .withDispatcher(Dispatchers.DefaultDispatcherId()), persistenceId); MockRaftActor mockRaftActor = raftActorRef.underlyingActor(); mockRaftActor.waitForInitializeBehaviorComplete(); raftActorRef.tell(new AppendEntries(1L, "leader", 0L, 1L, Collections.<ReplicatedLogEntry>emptyList(), 0L, -1L, (short) 1), ActorRef.noSender()); LeaderStateChanged leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class); assertEquals("getLeaderId", "leader", leaderStateChange.getLeaderId()); MessageCollectorActor.clearMessages(notifierActor); raftActorRef.tell(LeaderTransitioning.INSTANCE, ActorRef.noSender()); leaderStateChange = MessageCollectorActor.expectFirstMatching(notifierActor, LeaderStateChanged.class); assertEquals("getMemberId", persistenceId, leaderStateChange.getMemberId()); assertEquals("getLeaderId", null, leaderStateChange.getLeaderId()); TEST_LOG.info("testLeaderTransitioning ending"); } }