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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.cluster.metadata;
import org.elasticsearch.common.UUIDs;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.json.JsonXContent;
import org.elasticsearch.index.Index;
import org.elasticsearch.test.ESTestCase;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.stream.Collectors;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.lessThan;
import static org.hamcrest.Matchers.not;
/**
* Tests for the {@link IndexGraveyard} class
*/
public class IndexGraveyardTests extends ESTestCase {
public void testEquals() {
final IndexGraveyard graveyard = createRandom();
assertThat(graveyard, equalTo(IndexGraveyard.builder(graveyard).build()));
final IndexGraveyard.Builder newGraveyard = IndexGraveyard.builder(graveyard);
newGraveyard.addTombstone(new Index(randomAsciiOfLengthBetween(4, 15), UUIDs.randomBase64UUID()));
assertThat(newGraveyard.build(), not(graveyard));
}
public void testSerialization() throws IOException {
final IndexGraveyard graveyard = createRandom();
final BytesStreamOutput out = new BytesStreamOutput();
graveyard.writeTo(out);
assertThat(new IndexGraveyard(out.bytes().streamInput()), equalTo(graveyard));
}
public void testXContent() throws IOException {
final IndexGraveyard graveyard = createRandom();
final XContentBuilder builder = JsonXContent.contentBuilder();
builder.startObject();
graveyard.toXContent(builder, ToXContent.EMPTY_PARAMS);
builder.endObject();
XContentParser parser = createParser(JsonXContent.jsonXContent, builder.bytes());
parser.nextToken(); // the beginning of the parser
assertThat(IndexGraveyard.fromXContent(parser), equalTo(graveyard));
}
public void testAddTombstones() {
final IndexGraveyard graveyard1 = createRandom();
final IndexGraveyard.Builder graveyardBuidler = IndexGraveyard.builder(graveyard1);
final int numAdds = randomIntBetween(0, 4);
for (int j = 0; j < numAdds; j++) {
graveyardBuidler.addTombstone(new Index("nidx-" + j, UUIDs.randomBase64UUID()));
}
final IndexGraveyard graveyard2 = graveyardBuidler.build();
if (numAdds == 0) {
assertThat(graveyard2, equalTo(graveyard1));
} else {
assertThat(graveyard2, not(graveyard1));
assertThat(graveyard1.getTombstones().size(), lessThan(graveyard2.getTombstones().size()));
assertThat(Collections.indexOfSubList(graveyard2.getTombstones(), graveyard1.getTombstones()), equalTo(0));
}
}
public void testPurge() {
// try with max tombstones as some positive integer
executePurgeTestWithMaxTombstones(randomIntBetween(1, 20));
// try with max tombstones as the default
executePurgeTestWithMaxTombstones(IndexGraveyard.SETTING_MAX_TOMBSTONES.getDefault(Settings.EMPTY));
}
public void testDiffs() {
IndexGraveyard.Builder graveyardBuilder = IndexGraveyard.builder();
final int numToPurge = randomIntBetween(0, 4);
final List<Index> removals = new ArrayList<>();
for (int i = 0; i < numToPurge; i++) {
final Index indexToRemove = new Index("ridx-" + i, UUIDs.randomBase64UUID());
graveyardBuilder.addTombstone(indexToRemove);
removals.add(indexToRemove);
}
final int numTombstones = randomIntBetween(0, 4);
for (int i = 0; i < numTombstones; i++) {
graveyardBuilder.addTombstone(new Index("idx-" + i, UUIDs.randomBase64UUID()));
}
final IndexGraveyard graveyard1 = graveyardBuilder.build();
graveyardBuilder = IndexGraveyard.builder(graveyard1);
final int numToAdd = randomIntBetween(0, 4);
final List<Index> additions = new ArrayList<>();
for (int i = 0; i < numToAdd; i++) {
final Index indexToAdd = new Index("nidx-" + i, UUIDs.randomBase64UUID());
graveyardBuilder.addTombstone(indexToAdd);
additions.add(indexToAdd);
}
final IndexGraveyard graveyard2 = graveyardBuilder.build(settingsWithMaxTombstones(numTombstones + numToAdd));
final int numPurged = graveyardBuilder.getNumPurged();
assertThat(numPurged, equalTo(numToPurge));
final IndexGraveyard.IndexGraveyardDiff diff = new IndexGraveyard.IndexGraveyardDiff(graveyard1, graveyard2);
final List<Index> actualAdded = diff.getAdded().stream().map(t -> t.getIndex()).collect(Collectors.toList());
assertThat(new HashSet<>(actualAdded), equalTo(new HashSet<>(additions)));
assertThat(diff.getRemovedCount(), equalTo(removals.size()));
}
public void testContains() {
List<Index> indices = new ArrayList<>();
final int numIndices = randomIntBetween(1, 5);
for (int i = 0; i < numIndices; i++) {
indices.add(new Index("idx-" + i, UUIDs.randomBase64UUID()));
}
final IndexGraveyard.Builder graveyard = IndexGraveyard.builder();
for (final Index index : indices) {
graveyard.addTombstone(index);
}
final IndexGraveyard indexGraveyard = graveyard.build();
for (final Index index : indices) {
assertTrue(indexGraveyard.containsIndex(index));
}
assertFalse(indexGraveyard.containsIndex(new Index(randomAsciiOfLength(6), UUIDs.randomBase64UUID())));
}
public static IndexGraveyard createRandom() {
final IndexGraveyard.Builder graveyard = IndexGraveyard.builder();
final int numTombstones = randomIntBetween(0, 4);
for (int i = 0; i < numTombstones; i++) {
graveyard.addTombstone(new Index("idx-" + i, UUIDs.randomBase64UUID()));
}
return graveyard.build();
}
private void executePurgeTestWithMaxTombstones(final int maxTombstones) {
final int numExtra = randomIntBetween(1, 10);
final IndexGraveyard.Builder graveyardBuilder = createWithDeletions(maxTombstones + numExtra);
final IndexGraveyard graveyard = graveyardBuilder.build(settingsWithMaxTombstones(maxTombstones));
final int numPurged = graveyardBuilder.getNumPurged();
assertThat(numPurged, equalTo(numExtra));
assertThat(graveyard.getTombstones().size(), equalTo(maxTombstones));
}
private static IndexGraveyard.Builder createWithDeletions(final int numAdd) {
final IndexGraveyard.Builder graveyard = IndexGraveyard.builder();
for (int i = 0; i < numAdd; i++) {
graveyard.addTombstone(new Index("idx-" + i, UUIDs.randomBase64UUID()));
}
return graveyard;
}
private static Settings settingsWithMaxTombstones(final int maxTombstones) {
return Settings.builder().put(IndexGraveyard.SETTING_MAX_TOMBSTONES.getKey(), maxTombstones).build();
}
}
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