| /* |
| * 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. |
| * |
| */ |
| package org.apache.jackrabbit.oak.segment.spi.persistence.persistentcache; |
| |
| import org.apache.jackrabbit.oak.commons.Buffer; |
| import org.apache.jackrabbit.oak.segment.Segment; |
| import org.apache.jackrabbit.oak.segment.SegmentId; |
| import org.apache.jackrabbit.oak.segment.SegmentNotFoundException; |
| import org.apache.jackrabbit.oak.segment.file.FileStore; |
| import org.apache.jackrabbit.oak.segment.file.FileStoreBuilder; |
| import org.apache.jackrabbit.oak.segment.file.InvalidFileStoreVersionException; |
| import org.apache.jackrabbit.oak.segment.file.tar.TarPersistence; |
| import org.apache.jackrabbit.oak.segment.spi.RepositoryNotReachableException; |
| import org.apache.jackrabbit.oak.segment.spi.persistence.SegmentNodeStorePersistence; |
| import org.jetbrains.annotations.NotNull; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TemporaryFolder; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| |
| import static org.apache.jackrabbit.oak.segment.file.FileStoreBuilder.fileStoreBuilder; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| public class CachingPersistenceTest { |
| |
| @Rule |
| public TemporaryFolder folder = new TemporaryFolder(new File("target")); |
| |
| private File getFileStoreFolder() { |
| return folder.getRoot(); |
| } |
| |
| @Test(expected = RepositoryNotReachableException.class) |
| public void testRepositoryNotReachableWithCachingPersistence() throws IOException, InvalidFileStoreVersionException { |
| FileStoreBuilder fileStoreBuilder; |
| FileStore fileStore = null; |
| try { |
| |
| fileStoreBuilder = getFileStoreBuilderWithCachingPersistence(false); |
| |
| fileStore = fileStoreBuilder.build(); |
| |
| SegmentId id = new SegmentId(fileStore, 5, 5); |
| byte[] buffer = new byte[2]; |
| fileStore.writeSegment(id, buffer, 0, 2); |
| |
| assertTrue(fileStore.containsSegment(id)); |
| //close file store so that TarReader is used to read the segment |
| fileStore.close(); |
| |
| fileStoreBuilder = getFileStoreBuilderWithCachingPersistence(false); |
| fileStore = fileStoreBuilder.build(); |
| |
| Segment segment = fileStore.readSegment(id); |
| assertNotNull(segment); |
| |
| fileStore.close(); |
| |
| // Construct file store that will simulate throwing RepositoryNotReachableException when reading a segment |
| fileStoreBuilder = getFileStoreBuilderWithCachingPersistence(true); |
| fileStore = fileStoreBuilder.build(); |
| |
| try { |
| fileStore.readSegment(id); |
| } catch (SegmentNotFoundException e) { |
| fail(); |
| } |
| } finally { |
| if (fileStore != null) { |
| fileStore.close(); |
| } |
| } |
| } |
| |
| /** |
| * @param repoNotReachable - if set to true, {@code RepositoryNotReachableException} will be thrown when calling {@code SegmentArchiveReader}#readSegment |
| * @return |
| */ |
| @NotNull |
| private FileStoreBuilder getFileStoreBuilderWithCachingPersistence(boolean repoNotReachable) { |
| FileStoreBuilder fileStoreBuilder; |
| fileStoreBuilder = fileStoreBuilder(getFileStoreFolder()); |
| fileStoreBuilder.withSegmentCacheSize(10); |
| |
| SegmentNodeStorePersistence customPersistence = new CachingPersistence(new MemoryPersistentCache(repoNotReachable), new TarPersistence(getFileStoreFolder())); |
| fileStoreBuilder.withCustomPersistence(customPersistence); |
| return fileStoreBuilder; |
| } |
| |
| class MemoryPersistentCache extends AbstractPersistentCache { |
| |
| private final Map<String, Buffer> segments = Collections.synchronizedMap(new HashMap<String, Buffer>()); |
| |
| private boolean throwException = false; |
| |
| public MemoryPersistentCache(boolean throwException) { |
| this.throwException = throwException; |
| segmentCacheStats = new SegmentCacheStats( |
| "Memory Cache", |
| () -> null, |
| () -> null, |
| () -> null, |
| () -> null); |
| } |
| |
| @Override |
| protected Buffer readSegmentInternal(long msb, long lsb) { |
| return segments.get(String.valueOf(msb) + lsb); |
| } |
| |
| @Override |
| public boolean containsSegment(long msb, long lsb) { |
| return segments.containsKey(String.valueOf(msb) + lsb); |
| } |
| |
| @Override |
| public void writeSegment(long msb, long lsb, Buffer buffer) { |
| segments.put(String.valueOf(msb) + lsb, buffer); |
| } |
| |
| @Override |
| public Buffer readSegment(long msb, long lsb, @NotNull Callable<Buffer> loader) throws RepositoryNotReachableException { |
| return super.readSegment(msb, lsb, () -> { |
| if (throwException) { |
| throw new RepositoryNotReachableException(null); |
| } |
| return loader.call(); |
| }); |
| } |
| |
| @Override |
| public void cleanUp() { |
| |
| } |
| } |
| } |