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SubUpdaterTest.java
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SubUpdaterTest.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.internal.utils.pubsub.actors;
import static org.assertj.core.api.Assertions.assertThat;
import static org.eclipse.ditto.internal.utils.pubsub.actors.ClusterMemberRemovedAware.writeLocal;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CountDownLatch;
import org.eclipse.ditto.internal.utils.pubsub.api.SubAck;
import org.eclipse.ditto.internal.utils.pubsub.api.Subscribe;
import org.eclipse.ditto.internal.utils.pubsub.config.PubSubConfig;
import org.eclipse.ditto.internal.utils.pubsub.ddata.DDataReader;
import org.eclipse.ditto.internal.utils.pubsub.ddata.DDataWriter;
import org.eclipse.ditto.internal.utils.pubsub.ddata.compressed.CompressedDData;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mockito;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.cluster.Cluster;
import akka.cluster.ddata.ORMultiMap;
import akka.cluster.ddata.Replicator;
import akka.testkit.TestProbe;
import akka.testkit.javadsl.TestKit;
/**
* Tests {@link SubUpdater}.
*/
public final class SubUpdaterTest {
private ActorSystem system;
@Before
public void setUpCluster() throws Exception {
final CountDownLatch latch = new CountDownLatch(1);
system = ActorSystem.create("actorSystem", getTestConf());
final Cluster cluster1 = Cluster.get(system);
cluster1.registerOnMemberUp(latch::countDown);
cluster1.join(cluster1.selfAddress());
latch.await();
}
@After
public void shutdownCluster() {
TestKit.shutdownActorSystem(system);
}
@Test
public void clusterStateOutOfSync() {
final var system2 = ActorSystem.create("system2", getTestConf());
try {
new TestKit(system) {{
// GIVEN: distributed data contains entry for nonexistent cluster member
final var subscriber = TestProbe.apply(system);
final var config = PubSubConfig.of(system);
final var unknownActor = TestProbe.apply(system2).ref();
final var cluster2 = Cluster.get(system2);
final var addressMap = Map.of(mockActorRefWithAddress(unknownActor, cluster2), "unknown-value");
final CompressedDData ddata = mockDistributedData(addressMap);
final ActorRef underTest = system.actorOf(SubUpdater.props(config, subscriber.ref(), ddata));
// WHEN: SubUpdater is requested to sync against the cluster state
underTest.tell(ClusterStateSyncBehavior.Control.SYNC_CLUSTER_STATE, ActorRef.noSender());
// THEN: SubUpdater removes the extraneous entry
Mockito.verify(ddata.getReader(), Mockito.timeout(5000))
.getAllShards(eq((Replicator.ReadConsistency) Replicator.readLocal()));
Mockito.verify(ddata.getWriter(), Mockito.timeout(5000))
.removeAddress(eq(cluster2.selfAddress()),
eq((Replicator.WriteConsistency) Replicator.writeLocal()));
}};
} finally {
TestKit.shutdownActorSystem(system2);
}
}
@Test
public void clusterStateInSync() throws Exception {
new TestKit(system) {{
// GIVEN: distributed data contains entry for the current cluster member and no extraneous entries
final var subscriberRef = TestProbe.apply(system).ref();
final var config = PubSubConfig.of(system);
final var addressMap = Map.of(subscriberRef, "unknown-value");
final CompressedDData ddata = mockDistributedData(addressMap);
final ActorRef underTest = system.actorOf(SubUpdater.props(config, subscriberRef, ddata));
// GIVEN: local subscriptions are not empty
final var subscribe = Subscribe.of(List.of("topic"), subscriberRef, writeLocal(), true, null);
underTest.tell(subscribe, getRef());
expectMsgClass(SubAck.class);
// WHEN: SubUpdater is requested to sync against the cluster state
underTest.tell(ClusterStateSyncBehavior.Control.SYNC_CLUSTER_STATE, ActorRef.noSender());
// THEN: SubUpdater does not modify ddata more than needed
Mockito.verify(ddata.getReader(), Mockito.timeout(5000))
.getAllShards(eq((Replicator.ReadConsistency) Replicator.readLocal()));
Thread.sleep(3000);
Mockito.verify(ddata.getWriter(), Mockito.times(1)).put(any(), any(), any());
Mockito.verify(ddata.getWriter(), Mockito.never()).removeAddress(any(), any());
}};
}
@Test
public void consistencyCheckSucceeds() {
new TestKit(system) {{
// GIVEN: local subscriptions are not empty
final var subscriberRef = TestProbe.apply(system).ref();
final var config = PubSubConfig.of(system);
final var addressMap = Map.of(subscriberRef, "unknown-value");
final CompressedDData ddata = mockDistributedData(addressMap);
final ActorRef underTest = system.actorOf(SubUpdater.props(config, subscriberRef, ddata));
final var subscribe = Subscribe.of(List.of("topic"), subscriberRef, writeLocal(), true, null);
underTest.tell(subscribe, getRef());
expectMsgClass(SubAck.class);
// WHEN: SubUpdater is requested to resubscribe
final var writer = ddata.getWriter();
Mockito.when(writer.reset(any(), any(), any())).thenReturn(CompletableFuture.completedStage(null));
final var resubscribe = Subscribe.of(List.of("topic"), subscriberRef, writeLocal(), true, null, null, true);
underTest.tell(resubscribe, getRef());
// THEN: SubAck confirms consistency.
final var ack = expectMsgClass(SubAck.class);
assertThat(ack.isConsistent()).isTrue();
}};
}
@Test
public void consistencyCheckFails() {
new TestKit(system) {{
// GIVEN: local subscriptions are empty
final var subscriberRef = TestProbe.apply(system).ref();
final var config = PubSubConfig.of(system);
final var addressMap = Map.of(subscriberRef, "unknown-value");
final CompressedDData ddata = mockDistributedData(addressMap);
final ActorRef underTest = system.actorOf(SubUpdater.props(config, subscriberRef, ddata));
// WHEN: SubUpdater is requested to resubscribe
final var writer = ddata.getWriter();
Mockito.when(writer.reset(any(), any(), any())).thenReturn(CompletableFuture.completedStage(null));
final var resubscribe = Subscribe.of(List.of("topic"), subscriberRef, writeLocal(), true, null, null, true);
underTest.tell(resubscribe, getRef());
// THEN: SubAck denies consistency.
final var ack = expectMsgClass(SubAck.class);
assertThat(ack.isConsistent()).isFalse();
}};
}
private Config getTestConf() {
return ConfigFactory.load("pubsub-factory-test.conf");
}
private static ActorRef mockActorRefWithAddress(final ActorRef originalRef, final Cluster cluster) {
final var mock = Mockito.mock(ActorRef.class);
Mockito.when(mock.path()).thenReturn(cluster.remotePathOf(originalRef));
return mock;
}
@SuppressWarnings({"rawtypes", "unchecked"})
private static CompressedDData mockDistributedData(final Map<ActorRef, String> result) {
final ORMultiMap map = Mockito.mock(ORMultiMap.class);
Mockito.when(map.getEntries()).thenReturn(result);
final var mock = Mockito.mock(CompressedDData.class);
final var reader = Mockito.mock(DDataReader.class);
final var writer = Mockito.mock(DDataWriter.class);
Mockito.when(mock.getReader()).thenReturn(reader);
Mockito.when(mock.getWriter()).thenReturn(writer);
Mockito.when(mock.getSeeds()).thenReturn(List.of(1, 2));
Mockito.when(reader.get(any(), any())).thenReturn(CompletableFuture.completedStage(Optional.of(map)));
Mockito.when(reader.getAllShards(any())).thenReturn(CompletableFuture.completedStage(List.of(map)));
Mockito.when(writer.put(any(), any(), any())).thenReturn(CompletableFuture.completedStage(null));
return mock;
}
}