| /* |
| * Copyright (C) 2017, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.internal.storage.dfs; |
| |
| import static org.eclipse.jgit.lib.Constants.OBJ_BLOB; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.stream.LongStream; |
| |
| import org.eclipse.jgit.junit.TestRng; |
| import org.eclipse.jgit.lib.ObjectId; |
| import org.eclipse.jgit.lib.ObjectInserter; |
| import org.eclipse.jgit.lib.ObjectReader; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TestName; |
| |
| public class DfsBlockCacheTest { |
| @Rule |
| public TestName testName = new TestName(); |
| private TestRng rng; |
| private DfsBlockCache cache; |
| |
| @Before |
| public void setUp() { |
| rng = new TestRng(testName.getMethodName()); |
| resetCache(); |
| } |
| |
| @SuppressWarnings("resource") |
| @Test |
| public void streamKeyReusesBlocks() throws Exception { |
| DfsRepositoryDescription repo = new DfsRepositoryDescription("test"); |
| InMemoryRepository r1 = new InMemoryRepository(repo); |
| byte[] content = rng.nextBytes(424242); |
| ObjectId id; |
| try (ObjectInserter ins = r1.newObjectInserter()) { |
| id = ins.insert(OBJ_BLOB, content); |
| ins.flush(); |
| } |
| |
| long oldSize = LongStream.of(cache.getCurrentSize()).sum(); |
| assertTrue(oldSize > 2000); |
| assertEquals(0, LongStream.of(cache.getHitCount()).sum()); |
| |
| List<DfsPackDescription> packs = r1.getObjectDatabase().listPacks(); |
| InMemoryRepository r2 = new InMemoryRepository(repo); |
| r2.getObjectDatabase().commitPack(packs, Collections.emptyList()); |
| try (ObjectReader rdr = r2.newObjectReader()) { |
| byte[] actual = rdr.open(id, OBJ_BLOB).getBytes(); |
| assertTrue(Arrays.equals(content, actual)); |
| } |
| assertEquals(0, LongStream.of(cache.getMissCount()).sum()); |
| assertEquals(oldSize, LongStream.of(cache.getCurrentSize()).sum()); |
| } |
| |
| @SuppressWarnings("resource") |
| @Test |
| public void weirdBlockSize() throws Exception { |
| DfsRepositoryDescription repo = new DfsRepositoryDescription("test"); |
| InMemoryRepository r1 = new InMemoryRepository(repo); |
| |
| byte[] content1 = rng.nextBytes(4); |
| byte[] content2 = rng.nextBytes(424242); |
| ObjectId id1; |
| ObjectId id2; |
| try (ObjectInserter ins = r1.newObjectInserter()) { |
| id1 = ins.insert(OBJ_BLOB, content1); |
| id2 = ins.insert(OBJ_BLOB, content2); |
| ins.flush(); |
| } |
| |
| resetCache(); |
| List<DfsPackDescription> packs = r1.getObjectDatabase().listPacks(); |
| |
| InMemoryRepository r2 = new InMemoryRepository(repo); |
| r2.getObjectDatabase().setReadableChannelBlockSizeForTest(500); |
| r2.getObjectDatabase().commitPack(packs, Collections.emptyList()); |
| try (ObjectReader rdr = r2.newObjectReader()) { |
| byte[] actual = rdr.open(id1, OBJ_BLOB).getBytes(); |
| assertTrue(Arrays.equals(content1, actual)); |
| } |
| |
| InMemoryRepository r3 = new InMemoryRepository(repo); |
| r3.getObjectDatabase().setReadableChannelBlockSizeForTest(500); |
| r3.getObjectDatabase().commitPack(packs, Collections.emptyList()); |
| try (ObjectReader rdr = r3.newObjectReader()) { |
| byte[] actual = rdr.open(id2, OBJ_BLOB).getBytes(); |
| assertTrue(Arrays.equals(content2, actual)); |
| } |
| } |
| |
| private void resetCache() { |
| DfsBlockCache.reconfigure(new DfsBlockCacheConfig() |
| .setBlockSize(512) |
| .setBlockLimit(1 << 20)); |
| cache = DfsBlockCache.getInstance(); |
| } |
| } |