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/*
* Copyright (C) 2019, Google LLC. 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.ConfigConstants.CONFIG_COMMIT_GRAPH_SECTION;
import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_MIN_BYTES_OBJ_SIZE_INDEX;
import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_READ_CHANGED_PATHS;
import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_PACK_SECTION;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.Deflater;
import org.eclipse.jgit.internal.storage.commitgraph.CommitGraph;
import org.eclipse.jgit.internal.storage.dfs.DfsObjDatabase.PackSource;
import org.eclipse.jgit.internal.storage.dfs.DfsReader.PackLoadListener;
import org.eclipse.jgit.internal.storage.file.PackBitmapIndex;
import org.eclipse.jgit.internal.storage.pack.PackExt;
import org.eclipse.jgit.internal.storage.pack.PackOutputStream;
import org.eclipse.jgit.internal.storage.pack.PackWriter;
import org.eclipse.jgit.junit.JGitTestUtil;
import org.eclipse.jgit.junit.TestRepository;
import org.eclipse.jgit.junit.TestRng;
import org.eclipse.jgit.lib.BatchRefUpdate;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.NullProgressMonitor;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.storage.pack.PackConfig;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.junit.Before;
import org.junit.Test;
public class DfsPackFileTest {
InMemoryRepository db;
boolean bypassCache;
boolean clearCache;
@Before
public void setUp() {
db = new InMemoryRepository(new DfsRepositoryDescription("test"));
}
@Test
public void testCopyPackBypassCachesSmallCached() throws IOException {
bypassCache = true;
clearCache = false;
setupPack(512, 256);
assertPackSize();
}
@Test
public void testCopyPackBypassCacheSmallNoCache() throws IOException {
bypassCache = true;
clearCache = true;
setupPack(512, 256);
assertPackSize();
}
@Test
public void testCopyPackBypassCacheLargeCached() throws IOException {
bypassCache = true;
clearCache = false;
setupPack(512, 8000);
assertPackSize();
}
@Test
public void testCopyPackBypassCacheLargeNoCache() throws IOException {
bypassCache = true;
clearCache = true;
setupPack(512, 8000);
assertPackSize();
}
@Test
public void testCopyPackThroughCacheSmallCached() throws IOException {
bypassCache = false;
clearCache = false;
setupPack(512, 256);
assertPackSize();
}
@Test
public void testCopyPackThroughCacheSmallNoCache() throws IOException {
bypassCache = false;
clearCache = true;
setupPack(512, 256);
assertPackSize();
}
@Test
public void testCopyPackThroughCacheLargeCached() throws IOException {
bypassCache = false;
clearCache = false;
setupPack(512, 8000);
assertPackSize();
}
@Test
public void testCopyPackThroughCacheLargeNoCache() throws IOException {
bypassCache = false;
clearCache = true;
setupPack(512, 8000);
assertPackSize();
}
@Test
public void testLoadObjectSizeIndex() throws IOException {
bypassCache = false;
clearCache = true;
setObjectSizeIndexMinBytes(0);
ObjectId blobId = setupPack(512, 800);
db.getObjectDatabase().getReaderOptions().setUseObjectSizeIndex(true);
DfsReader reader = db.getObjectDatabase().newReader();
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
assertTrue(pack.hasObjectSizeIndex(reader));
assertEquals(800, pack.getIndexedObjectSize(reader,
pack.findIdxPosition(reader, blobId)));
}
@Test
public void testGetBitmapIndex() throws IOException {
bypassCache = false;
clearCache = true;
ObjectId objectId = setupPack(512, 800);
// Add a ref for GC
BatchRefUpdate batchRefUpdate = db.getRefDatabase().newBatchUpdate();
batchRefUpdate.addCommand(new ReceiveCommand(ObjectId.zeroId(),
objectId, "refs/heads/master"));
try (RevWalk rw = new RevWalk(db)) {
batchRefUpdate.execute(rw, NullProgressMonitor.INSTANCE);
}
DfsGarbageCollector gc = new DfsGarbageCollector(db);
gc.pack(NullProgressMonitor.INSTANCE);
DfsReader reader = db.getObjectDatabase().newReader();
PackBitmapIndex bitmapIndex = db.getObjectDatabase().getPacks()[0]
.getBitmapIndex(reader);
assertNotNull(bitmapIndex);
assertEquals(1, bitmapIndex.getObjectCount());
}
@Test
public void testGetBitmapIndex_noBitmaps() throws IOException {
bypassCache = false;
clearCache = true;
setupPack(512, 800);
DfsReader reader = db.getObjectDatabase().newReader();
PackBitmapIndex bitmapIndex = db.getObjectDatabase().getPacks()[0]
.getBitmapIndex(reader);
assertNull(bitmapIndex);
}
@Test
public void testLoadObjectSizeIndex_noIndex() throws IOException {
bypassCache = false;
clearCache = true;
setObjectSizeIndexMinBytes(-1);
setupPack(512, 800);
DfsReader reader = db.getObjectDatabase().newReader();
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
assertFalse(pack.hasObjectSizeIndex(reader));
}
private static class TestPackLoadListener implements PackLoadListener {
final Map<PackExt, Integer> indexLoadCount = new HashMap<>();
int blockLoadCount;
@SuppressWarnings("boxing")
@Override
public void onIndexLoad(String packName, PackSource src, PackExt ext,
long size, Object loadedIdx) {
indexLoadCount.merge(ext, 1, Integer::sum);
}
@Override
public void onBlockLoad(String packName, PackSource src, PackExt ext, long position,
DfsBlockData dfsBlockData) {
blockLoadCount += 1;
}
}
@Test
public void testIndexLoadCallback_indexNotInCache() throws IOException {
bypassCache = false;
clearCache = true;
setObjectSizeIndexMinBytes(-1);
setupPack(512, 800);
TestPackLoadListener tal = new TestPackLoadListener();
DfsReader reader = db.getObjectDatabase().newReader();
reader.addPackLoadListener(tal);
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
pack.getPackIndex(reader);
assertEquals(1, tal.indexLoadCount.get(PackExt.INDEX).intValue());
}
@Test
public void testIndexLoadCallback_indexInCache() throws IOException {
bypassCache = false;
clearCache = false;
setObjectSizeIndexMinBytes(-1);
setupPack(512, 800);
TestPackLoadListener tal = new TestPackLoadListener();
DfsReader reader = db.getObjectDatabase().newReader();
reader.addPackLoadListener(tal);
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
pack.getPackIndex(reader);
pack.getPackIndex(reader);
pack.getPackIndex(reader);
assertEquals(1, tal.indexLoadCount.get(PackExt.INDEX).intValue());
}
@Test
public void testIndexLoadCallback_multipleReads() throws IOException {
bypassCache = false;
clearCache = true;
setObjectSizeIndexMinBytes(-1);
setupPack(512, 800);
TestPackLoadListener tal = new TestPackLoadListener();
DfsReader reader = db.getObjectDatabase().newReader();
reader.addPackLoadListener(tal);
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
pack.getPackIndex(reader);
pack.getPackIndex(reader);
pack.getPackIndex(reader);
assertEquals(1, tal.indexLoadCount.get(PackExt.INDEX).intValue());
}
@Test
public void testBlockLoadCallback_loadInCache() throws IOException {
bypassCache = false;
clearCache = true;
setObjectSizeIndexMinBytes(-1);
setupPack(512, 800);
TestPackLoadListener tal = new TestPackLoadListener();
DfsReader reader = db.getObjectDatabase().newReader();
reader.addPackLoadListener(tal);
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
ObjectId anObject = pack.getPackIndex(reader).getObjectId(0);
pack.get(reader, anObject).getBytes();
assertEquals(2, tal.blockLoadCount);
}
@Test
public void testExistenceOfBloomFilterAlongWithCommitGraph()
throws Exception {
try (TestRepository<InMemoryRepository> repository = new TestRepository<>(
db)) {
repository.branch("/refs/heads/main").commit().add("blob1", "blob1")
.create();
}
setReadChangedPaths(true);
DfsGarbageCollector gc = new DfsGarbageCollector(db);
gc.setWriteCommitGraph(true).setWriteBloomFilter(true)
.pack(NullProgressMonitor.INSTANCE);
DfsReader reader = db.getObjectDatabase().newReader();
CommitGraph cg = db.getObjectDatabase().getPacks()[0]
.getCommitGraph(reader);
assertNotNull(cg);
assertEquals(1, cg.getCommitCnt());
assertNotNull(cg.getChangedPathFilter(0));
}
private ObjectId setupPack(int bs, int ps) throws IOException {
DfsBlockCacheConfig cfg = new DfsBlockCacheConfig().setBlockSize(bs)
.setBlockLimit(bs * 100).setStreamRatio(bypassCache ? 0F : 1F);
DfsBlockCache.reconfigure(cfg);
byte[] data = new TestRng(JGitTestUtil.getName()).nextBytes(ps);
DfsInserter ins = (DfsInserter) db.newObjectInserter();
ins.setCompressionLevel(Deflater.NO_COMPRESSION);
ObjectId blobId = ins.insert(Constants.OBJ_BLOB, data);
ins.flush();
if (clearCache) {
DfsBlockCache.reconfigure(cfg);
db.getObjectDatabase().clearCache();
}
return blobId;
}
private void assertPackSize() throws IOException {
try (DfsReader ctx = db.getObjectDatabase().newReader();
PackWriter pw = new PackWriter(new PackConfig(), ctx);
ByteArrayOutputStream os = new ByteArrayOutputStream();
PackOutputStream out = new PackOutputStream(
NullProgressMonitor.INSTANCE, os, pw)) {
DfsPackFile pack = db.getObjectDatabase().getPacks()[0];
long packSize = pack.getPackDescription().getFileSize(PackExt.PACK);
pack.copyPackAsIs(out, ctx);
assertEquals(packSize - (12 + 20), os.size());
}
}
private void setObjectSizeIndexMinBytes(int threshold) {
db.getConfig().setInt(CONFIG_PACK_SECTION, null,
CONFIG_KEY_MIN_BYTES_OBJ_SIZE_INDEX, threshold);
}
private void setReadChangedPaths(boolean enable) {
db.getConfig().setBoolean(CONFIG_COMMIT_GRAPH_SECTION, null,
CONFIG_KEY_READ_CHANGED_PATHS, enable);
}
}
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