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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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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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