2 * Copyright 2017-2021 Open Networking Foundation
3 * Copyright 2023 PANTHEON.tech, s.r.o.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 package io.atomix.storage.journal;
19 import static org.junit.Assert.assertArrayEquals;
20 import static org.junit.Assert.assertEquals;
21 import static org.junit.Assert.assertNotNull;
22 import static org.junit.Assert.assertNull;
24 import java.io.IOException;
25 import java.nio.file.FileVisitResult;
26 import java.nio.file.Files;
27 import java.nio.file.Path;
28 import java.nio.file.Paths;
29 import java.nio.file.SimpleFileVisitor;
30 import java.nio.file.attribute.BasicFileAttributes;
31 import java.util.ArrayList;
32 import java.util.List;
33 import org.eclipse.jdt.annotation.NonNull;
34 import org.eclipse.jdt.annotation.Nullable;
35 import org.junit.After;
36 import org.junit.Before;
37 import org.junit.Test;
38 import org.junit.runner.RunWith;
39 import org.junit.runners.Parameterized;
44 * @author <a href="http://github.com/kuujo">Jordan Halterman</a>
46 @RunWith(Parameterized.class)
47 public abstract class AbstractJournalTest {
48 @Deprecated(forRemoval = true, since = "9.0.3")
49 private static final JournalSerdes NAMESPACE = JournalSerdes.builder()
50 .register(new TestEntrySerdes(), TestEntry.class)
51 .register(new ByteArraySerdes(), byte[].class)
54 protected static final TestEntry ENTRY = new TestEntry(32);
55 private static final Path PATH = Paths.get("target/test-logs/");
57 private final StorageLevel storageLevel;
58 private final int maxSegmentSize;
59 protected final int entriesPerSegment;
61 protected AbstractJournalTest(final StorageLevel storageLevel, final int maxSegmentSize) {
62 this.storageLevel = storageLevel;
63 this.maxSegmentSize = maxSegmentSize;
64 int entryLength = NAMESPACE.serialize(ENTRY).length + 8;
65 entriesPerSegment = (maxSegmentSize - 64) / entryLength;
68 @Parameterized.Parameters
69 public static List<Object[]> primeNumbers() {
70 var runs = new ArrayList<Object[]>();
71 for (int i = 1; i <= 10; i++) {
72 for (int j = 1; j <= 10; j++) {
73 runs.add(new Object[] { 64 + i * (NAMESPACE.serialize(ENTRY).length + 8) + j });
79 protected SegmentedJournal<TestEntry> createJournal() {
80 return SegmentedJournal.<TestEntry>builder()
82 .withDirectory(PATH.toFile())
83 .withNamespace(NAMESPACE)
84 .withStorageLevel(storageLevel)
85 .withMaxSegmentSize(maxSegmentSize)
91 public void testCloseMultipleTimes() {
93 final Journal<TestEntry> journal = createJournal();
103 public void testWriteRead() throws Exception {
104 try (var journal = createJournal()) {
105 var writer = journal.writer();
106 var reader = journal.openReader(1);
108 // Append a couple entries.
109 assertEquals(1, writer.getNextIndex());
110 var indexed = writer.append(ENTRY);
111 assertEquals(1, indexed.index());
113 assertEquals(2, writer.getNextIndex());
114 writer.append(ENTRY);
116 indexed = assertNext(reader);
117 assertEquals(2, indexed.index());
118 assertNoNext(reader);
120 // Test reading an entry
122 var entry1 = assertNext(reader);
123 assertEquals(1, entry1.index());
125 // Test reading a second entry
126 assertEquals(2, reader.getNextIndex());
127 var entry2 = assertNext(reader);
128 assertEquals(2, entry2.index());
129 assertEquals(3, reader.getNextIndex());
130 assertNoNext(reader);
132 // Test opening a new reader and reading from the journal.
133 reader = journal.openReader(1);
134 entry1 = assertNext(reader);
135 assertEquals(1, entry1.index());
137 assertEquals(2, reader.getNextIndex());
138 entry2 = assertNext(reader);
139 assertEquals(2, entry2.index());
140 assertNoNext(reader);
145 // Test opening a new reader and reading from the journal.
146 reader = journal.openReader(1);
147 entry1 = assertNext(reader);
148 assertEquals(1, entry1.index());
150 assertEquals(2, reader.getNextIndex());
151 entry2 = assertNext(reader);
152 assertEquals(2, entry2.index());
153 assertNoNext(reader);
155 // Truncate the journal and write a different entry.
157 assertEquals(2, writer.getNextIndex());
158 writer.append(ENTRY);
160 indexed = assertNext(reader);
161 assertEquals(2, indexed.index());
163 // Reset the reader to a specific index and read the last entry again.
166 assertEquals(2, reader.getNextIndex());
167 entry2 = assertNext(reader);
168 assertEquals(2, entry2.index());
169 assertNoNext(reader);
174 public void testResetTruncateZero() throws Exception {
175 try (SegmentedJournal<TestEntry> journal = createJournal()) {
176 JournalWriter<TestEntry> writer = journal.writer();
177 JournalReader<TestEntry> reader = journal.openReader(1);
179 assertEquals(0, journal.lastIndex());
180 assertEquals(1, writer.getNextIndex());
181 writer.append(ENTRY);
182 writer.append(ENTRY);
185 assertEquals(0, journal.lastIndex());
186 assertEquals(1, writer.getNextIndex());
187 // Repeat to assert this is a no-op
189 assertEquals(0, journal.lastIndex());
190 assertEquals(1, writer.getNextIndex());
192 writer.append(ENTRY);
194 var indexed = assertNext(reader);
195 assertEquals(1, indexed.index());
197 assertEquals(0, journal.lastIndex());
198 assertEquals(1, writer.getNextIndex());
199 indexed = writer.append(ENTRY);
200 assertEquals(1, journal.lastIndex());
201 assertEquals(2, writer.getNextIndex());
202 assertEquals(1, indexed.index());
204 indexed = assertNext(reader);
205 assertEquals(1, indexed.index());
208 assertEquals(0, journal.lastIndex());
209 assertEquals(1, writer.getNextIndex());
210 indexed = writer.append(ENTRY);
211 assertEquals(1, journal.lastIndex());
212 assertEquals(2, writer.getNextIndex());
213 assertEquals(1, indexed.index());
215 indexed = assertNext(reader);
216 assertEquals(1, indexed.index());
221 public void testTruncateRead() throws Exception {
223 try (Journal<TestEntry> journal = createJournal()) {
224 JournalWriter<TestEntry> writer = journal.writer();
225 JournalReader<TestEntry> reader = journal.openReader(1);
227 for (int i = 1; i <= cnt; i++) {
228 assertEquals(i, writer.append(new TestEntry(32)).index());
231 for (int i = 1; i <= cnt - 2; i++) {
232 assertEquals(i, assertNext(reader).index());
235 writer.reset(cnt - 1);
237 assertNoNext(reader);
238 assertEquals(cnt - 1, writer.append(new TestEntry(32)).index());
239 assertEquals(cnt, writer.append(new TestEntry(32)).index());
241 var entry = assertNext(reader);
242 assertEquals(cnt - 1, entry.index());
243 entry = assertNext(reader);
244 assertNotNull(entry);
245 assertEquals(cnt, entry.index());
250 public void testWriteReadEntries() throws Exception {
251 try (Journal<TestEntry> journal = createJournal()) {
252 JournalWriter<TestEntry> writer = journal.writer();
253 JournalReader<TestEntry> reader = journal.openReader(1);
255 for (int i = 1; i <= entriesPerSegment * 5; i++) {
256 writer.append(ENTRY);
257 var entry = assertNext(reader);
258 assertEquals(i, entry.index());
259 assertArrayEquals(ENTRY.bytes(), entry.entry().bytes());
261 entry = assertNext(reader);
262 assertEquals(i, entry.index());
263 assertArrayEquals(ENTRY.bytes(), entry.entry().bytes());
267 assertEquals(i - 5, reader.getNextIndex());
273 writer.append(ENTRY);
277 entry = assertNext(reader);
278 assertEquals(i, entry.index());
279 assertArrayEquals(ENTRY.bytes(), entry.entry().bytes());
285 public void testWriteReadCommittedEntries() throws Exception {
286 try (Journal<TestEntry> journal = createJournal()) {
287 JournalWriter<TestEntry> writer = journal.writer();
288 JournalReader<TestEntry> reader = journal.openReader(1, JournalReader.Mode.COMMITS);
290 for (int i = 1; i <= entriesPerSegment * 5; i++) {
291 writer.append(ENTRY);
292 assertNoNext(reader);
294 var entry = assertNext(reader);
295 assertEquals(i, entry.index());
296 assertArrayEquals(ENTRY.bytes(), entry.entry().bytes());
298 entry = assertNext(reader);
299 assertEquals(i, entry.index());
300 assertArrayEquals(ENTRY.bytes(), entry.entry().bytes());
306 public void testReadAfterCompact() throws Exception {
307 try (SegmentedJournal<TestEntry> journal = createJournal()) {
308 JournalWriter<TestEntry> writer = journal.writer();
309 JournalReader<TestEntry> uncommittedReader = journal.openReader(1, JournalReader.Mode.ALL);
310 JournalReader<TestEntry> committedReader = journal.openReader(1, JournalReader.Mode.COMMITS);
312 for (int i = 1; i <= entriesPerSegment * 10; i++) {
313 assertEquals(i, writer.append(ENTRY).index());
316 assertEquals(1, uncommittedReader.getNextIndex());
317 assertEquals(1, committedReader.getNextIndex());
319 // This creates asymmetry, as uncommitted reader will move one step ahead...
320 assertNext(uncommittedReader);
321 assertEquals(2, uncommittedReader.getNextIndex());
322 assertNoNext(committedReader);
323 assertEquals(1, committedReader.getNextIndex());
325 writer.commit(entriesPerSegment * 9);
327 // ... so here we catch up ...
328 assertNext(committedReader);
329 assertEquals(2, committedReader.getNextIndex());
331 // ... and continue from the second entry
332 for (int i = 2; i <= entriesPerSegment * 2.5; i++) {
333 var entry = assertNext(uncommittedReader);
334 assertEquals(i, entry.index());
336 entry = assertNext(committedReader);
337 assertEquals(i, entry.index());
340 journal.compact(entriesPerSegment * 5 + 1);
342 assertEquals(entriesPerSegment * 5 + 1, uncommittedReader.getNextIndex());
343 var entry = assertNext(uncommittedReader);
344 assertEquals(entriesPerSegment * 5 + 1, entry.index());
346 assertEquals(entriesPerSegment * 5 + 1, committedReader.getNextIndex());
347 entry = assertNext(committedReader);
348 assertEquals(entriesPerSegment * 5 + 1, entry.index());
353 * Tests reading from a compacted journal.
356 public void testCompactAndRecover() throws Exception {
357 try (var journal = createJournal()) {
358 // Write three segments to the journal.
359 final var writer = journal.writer();
360 for (int i = 0; i < entriesPerSegment * 3; i++) {
361 writer.append(ENTRY);
364 // Commit the entries and compact the first segment.
365 writer.commit(entriesPerSegment * 3);
366 journal.compact(entriesPerSegment + 1);
369 // Reopen the journal and create a reader.
370 try (var journal = createJournal()) {
371 final var writer = journal.writer();
372 final var reader = journal.openReader(1, JournalReader.Mode.COMMITS);
373 writer.append(ENTRY);
374 writer.append(ENTRY);
375 writer.commit(entriesPerSegment * 3);
377 // Ensure the reader starts at the first physical index in the journal.
378 assertEquals(entriesPerSegment + 1, reader.getNextIndex());
379 assertEquals(reader.getFirstIndex(), reader.getNextIndex());
380 assertEquals(entriesPerSegment + 1, assertNext(reader).index());
381 assertEquals(entriesPerSegment + 2, reader.getNextIndex());
387 public void cleanupStorage() throws IOException {
388 if (Files.exists(PATH)) {
389 Files.walkFileTree(PATH, new SimpleFileVisitor<Path>() {
391 public FileVisitResult visitFile(final Path file, final BasicFileAttributes attrs) throws IOException {
393 return FileVisitResult.CONTINUE;
397 public FileVisitResult postVisitDirectory(final Path dir, final IOException exc) throws IOException {
399 return FileVisitResult.CONTINUE;
405 private static @NonNull Indexed<TestEntry> assertNext(final JournalReader<TestEntry> reader) {
406 final var ret = tryNext(reader);
411 private static void assertNoNext(final JournalReader<TestEntry> reader) {
412 assertNull(tryNext(reader));
415 private static @Nullable Indexed<TestEntry> tryNext(final JournalReader<TestEntry> reader) {
416 return reader.tryNext(Indexed::new);