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ForceSnapshot transformations should not be persisted in the local lo…
…g table Patch by Sam Tunnicliffe; reviewed by marcuse for CASSANDRA-19190
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133 changes: 133 additions & 0 deletions
133
test/unit/org/apache/cassandra/tcm/listeners/MetadataSnapshotListenerTest.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.cassandra.tcm.listeners; | ||
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| import java.util.Random; | ||
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| import org.junit.Before; | ||
| import org.junit.BeforeClass; | ||
| import org.junit.Test; | ||
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import org.apache.cassandra.config.CassandraRelevantProperties; | ||
| import org.apache.cassandra.dht.IPartitioner; | ||
| import org.apache.cassandra.dht.Murmur3Partitioner; | ||
| import org.apache.cassandra.tcm.AtomicLongBackedProcessor; | ||
| import org.apache.cassandra.tcm.ClusterMetadata; | ||
| import org.apache.cassandra.tcm.ClusterMetadataService; | ||
| import org.apache.cassandra.tcm.Epoch; | ||
| import org.apache.cassandra.tcm.MetadataSnapshots; | ||
| import org.apache.cassandra.tcm.StubClusterMetadataService; | ||
| import org.apache.cassandra.tcm.Transformation; | ||
| import org.apache.cassandra.tcm.log.Entry; | ||
| import org.apache.cassandra.tcm.ownership.OwnershipUtils; | ||
| import org.apache.cassandra.tcm.transformations.ForceSnapshot; | ||
| import org.apache.cassandra.tcm.transformations.TriggerSnapshot; | ||
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| import static org.apache.cassandra.distributed.test.log.ClusterMetadataTestHelper.minimalForTesting; | ||
| import static org.apache.cassandra.tcm.sequences.SequencesUtils.epoch; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertNull; | ||
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| public class MetadataSnapshotListenerTest | ||
| { | ||
| private static final Logger logger = LoggerFactory.getLogger(MetadataSnapshotListenerTest.class); | ||
| private IPartitioner partitioner = Murmur3Partitioner.instance; | ||
| private Random r; | ||
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| @BeforeClass | ||
| public static void disableSortedReplicaGroups() | ||
| { | ||
| // Set this so that we don't attempt to sort the random placements as this depends on a populated | ||
| // TokenMap. This is a temporary element of ClusterMetadata, at least in the current form | ||
| CassandraRelevantProperties.TCM_SORT_REPLICA_GROUPS.setBoolean(false); | ||
| } | ||
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| @Before | ||
| public void setup() | ||
| { | ||
| long seed = System.nanoTime(); | ||
| r = new Random(seed); | ||
| logger.info("SEED: {}", seed); | ||
| } | ||
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| @Test | ||
| public void forceSnapshotTriggersSnapshot() | ||
| { | ||
| // ForceSnapshot contains a complete ClusterMetadata which is what we expect to be | ||
| // stored as the snapshot. The input to its execute method is the previous ClusterMetadata | ||
| // and isn't relevant here. | ||
| MetadataSnapshots snapshots = init(); | ||
| ClusterMetadata toSnapshot = metadataForSnapshot(); | ||
| Entry entry = new Entry(Entry.Id.NONE, | ||
| toSnapshot.epoch, | ||
| new ForceSnapshot(toSnapshot)); | ||
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| ClusterMetadata previous = minimalForTesting(Epoch.FIRST, partitioner); | ||
| Transformation.Result result = entry.transform.execute(previous); | ||
| MetadataSnapshotListener listener = new MetadataSnapshotListener(); | ||
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| // The payload of the transformation should be retrievable by its epoch | ||
| assertNull(snapshots.getSnapshot(toSnapshot.epoch)); | ||
| listener.notify(entry, result); | ||
| assertEquals(toSnapshot, snapshots.getSnapshot(toSnapshot.epoch)); | ||
| } | ||
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| @Test | ||
| public void triggerSnapshotTest() | ||
| { | ||
| // TriggerSnapshot has no payload itself, but stores the preceding ClusterMetadata state as a snapshot. | ||
| MetadataSnapshots snapshots = init(); | ||
| ClusterMetadata toSnapshot = metadataForSnapshot(); | ||
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| Epoch nextEpoch = toSnapshot.nextEpoch(); | ||
| Entry entry = new Entry(Entry.Id.NONE, nextEpoch, TriggerSnapshot.instance); | ||
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| Transformation.Result result = entry.transform.execute(toSnapshot); | ||
| MetadataSnapshotListener listener = new MetadataSnapshotListener(); | ||
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| assertNull(snapshots.getSnapshot(nextEpoch)); | ||
| listener.notify(entry, result); | ||
| ClusterMetadata snapshot = snapshots.getSnapshot(nextEpoch); | ||
| assertEquals(nextEpoch, snapshot.epoch); | ||
| assertEquals(toSnapshot.placements, snapshot.placements); | ||
| } | ||
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| private MetadataSnapshots init() | ||
| { | ||
| MetadataSnapshots snapshots = new AtomicLongBackedProcessor.InMemoryMetadataSnapshots(); | ||
| StubClusterMetadataService service = StubClusterMetadataService.builder(partitioner) | ||
| .withSnapshots(snapshots) | ||
| .build(); | ||
| ClusterMetadataService.unsetInstance(); | ||
| ClusterMetadataService.setInstance(service); | ||
| return snapshots; | ||
| } | ||
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| private ClusterMetadata metadataForSnapshot() | ||
| { | ||
| return minimalForTesting(epoch(r), partitioner) | ||
| .transformer() | ||
| .with(OwnershipUtils.randomPlacements(r)).build() | ||
| .metadata; | ||
| } | ||
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| } |
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