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- /*
- * Copyright (C) 2009-2010, Google Inc.
- * Copyright (C) 2009, Robin Rosenberg <robin.rosenberg@dewire.com> 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.file;
-
- import static org.junit.Assert.assertArrayEquals;
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.assertFalse;
- import static org.junit.Assert.assertNotNull;
- import static org.junit.Assert.assertNotSame;
- import static org.junit.Assert.fail;
-
- import java.io.BufferedOutputStream;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.OutputStream;
- import java.time.Instant;
-
- import org.eclipse.jgit.errors.IncorrectObjectTypeException;
- import org.eclipse.jgit.errors.MissingObjectException;
- import org.eclipse.jgit.internal.storage.pack.PackExt;
- import org.eclipse.jgit.internal.storage.pack.PackWriter;
- import org.eclipse.jgit.junit.RepositoryTestCase;
- import org.eclipse.jgit.lib.AnyObjectId;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.NullProgressMonitor;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.ObjectInserter;
- import org.eclipse.jgit.lib.ObjectLoader;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.revwalk.RevObject;
- import org.eclipse.jgit.revwalk.RevWalk;
- import org.eclipse.jgit.storage.file.WindowCacheConfig;
- import org.eclipse.jgit.util.FS;
- import org.eclipse.jgit.util.FileUtils;
- import org.junit.After;
- import org.junit.Before;
- import org.junit.Test;
-
- public class ConcurrentRepackTest extends RepositoryTestCase {
- @Override
- @Before
- public void setUp() throws Exception {
- WindowCacheConfig windowCacheConfig = new WindowCacheConfig();
- windowCacheConfig.setPackedGitOpenFiles(1);
- windowCacheConfig.install();
- super.setUp();
- }
-
- @Override
- @After
- public void tearDown() throws Exception {
- super.tearDown();
- new WindowCacheConfig().install();
- }
-
- @Test
- public void testObjectInNewPack() throws IncorrectObjectTypeException,
- IOException {
- // Create a new object in a new pack, and test that it is present.
- //
- final Repository eden = createBareRepository();
- final RevObject o1 = writeBlob(eden, "o1");
- pack(eden, o1);
- assertEquals(o1.name(), parse(o1).name());
- }
-
- @Test
- public void testObjectMovedToNewPack1()
- throws IncorrectObjectTypeException, IOException {
- // Create an object and pack it. Then remove that pack and put the
- // object into a different pack file, with some other object. We
- // still should be able to access the objects.
- //
- final Repository eden = createBareRepository();
- final RevObject o1 = writeBlob(eden, "o1");
- final File[] out1 = pack(eden, o1);
- assertEquals(o1.name(), parse(o1).name());
-
- final RevObject o2 = writeBlob(eden, "o2");
- pack(eden, o2, o1);
-
- // Force close, and then delete, the old pack.
- //
- whackCache();
- delete(out1);
-
- // Now here is the interesting thing. Will git figure the new
- // object exists in the new pack, and not the old one.
- //
- assertEquals(o2.name(), parse(o2).name());
- assertEquals(o1.name(), parse(o1).name());
- }
-
- @Test
- public void testObjectMovedWithinPack()
- throws IncorrectObjectTypeException, IOException {
- // Create an object and pack it.
- //
- final Repository eden = createBareRepository();
- final RevObject o1 = writeBlob(eden, "o1");
- final File[] out1 = pack(eden, o1);
- assertEquals(o1.name(), parse(o1).name());
-
- // Force close the old pack.
- //
- whackCache();
-
- // Now overwrite the old pack in place. This method of creating a
- // different pack under the same file name is partially broken. We
- // should also have a different file name because the list of objects
- // within the pack has been modified.
- //
- final RevObject o2 = writeBlob(eden, "o2");
- try (PackWriter pw = new PackWriter(eden)) {
- pw.addObject(o2);
- pw.addObject(o1);
- write(out1, pw);
- }
-
- // Try the old name, then the new name. The old name should cause the
- // pack to reload when it opens and the index and pack mismatch.
- //
- assertEquals(o1.name(), parse(o1).name());
- assertEquals(o2.name(), parse(o2).name());
- }
-
- @Test
- public void testObjectMovedToNewPack2()
- throws IncorrectObjectTypeException, IOException {
- // Create an object and pack it. Then remove that pack and put the
- // object into a different pack file, with some other object. We
- // still should be able to access the objects.
- //
- final Repository eden = createBareRepository();
- final RevObject o1 = writeBlob(eden, "o1");
- final File[] out1 = pack(eden, o1);
- assertEquals(o1.name(), parse(o1).name());
-
- final ObjectLoader load1 = db.open(o1, Constants.OBJ_BLOB);
- assertNotNull(load1);
-
- final RevObject o2 = writeBlob(eden, "o2");
- pack(eden, o2, o1);
-
- // Force close, and then delete, the old pack.
- //
- whackCache();
- delete(out1);
-
- // Now here is the interesting thing... can the loader we made
- // earlier still resolve the object, even though its underlying
- // pack is gone, but the object still exists.
- //
- final ObjectLoader load2 = db.open(o1, Constants.OBJ_BLOB);
- assertNotNull(load2);
- assertNotSame(load1, load2);
-
- final byte[] data2 = load2.getCachedBytes();
- final byte[] data1 = load1.getCachedBytes();
- assertNotNull(data2);
- assertNotNull(data1);
- assertNotSame(data1, data2); // cache should be per-pack, not per object
- assertArrayEquals(data1, data2);
- assertEquals(load2.getType(), load1.getType());
- }
-
- private static void whackCache() {
- final WindowCacheConfig config = new WindowCacheConfig();
- config.setPackedGitOpenFiles(1);
- config.install();
- }
-
- private RevObject parse(AnyObjectId id)
- throws MissingObjectException, IOException {
- try (RevWalk rw = new RevWalk(db)) {
- return rw.parseAny(id);
- }
- }
-
- private File[] pack(Repository src, RevObject... list)
- throws IOException {
- try (PackWriter pw = new PackWriter(src)) {
- for (RevObject o : list) {
- pw.addObject(o);
- }
-
- PackFile packFile = new PackFile(
- db.getObjectDatabase().getPackDirectory(), pw.computeName(),
- PackExt.PACK);
- PackFile idxFile = packFile.create(PackExt.INDEX);
- final File[] files = new File[] { packFile, idxFile };
- write(files, pw);
- return files;
- }
- }
-
- private static void write(File[] files, PackWriter pw)
- throws IOException {
- final Instant begin = FS.DETECTED
- .lastModifiedInstant(files[0].getParentFile());
- NullProgressMonitor m = NullProgressMonitor.INSTANCE;
-
- try (OutputStream out = new BufferedOutputStream(
- new FileOutputStream(files[0]))) {
- pw.writePack(m, m, out);
- }
-
- try (OutputStream out = new BufferedOutputStream(
- new FileOutputStream(files[1]))) {
- pw.writeIndex(out);
- }
-
- touch(begin, files[0].getParentFile());
- }
-
- private static void delete(File[] list) throws IOException {
- final Instant begin = FS.DETECTED
- .lastModifiedInstant(list[0].getParentFile());
- for (File f : list) {
- FileUtils.delete(f);
- assertFalse(f + " was removed", f.exists());
- }
- touch(begin, list[0].getParentFile());
- }
-
- private static void touch(Instant begin, File dir) throws IOException {
- while (begin.compareTo(FS.DETECTED.lastModifiedInstant(dir)) >= 0) {
- try {
- Thread.sleep(25);
- } catch (InterruptedException ie) {
- //
- }
- FS.DETECTED.setLastModified(dir.toPath(), Instant.now());
- }
- }
-
- private RevObject writeBlob(Repository repo, String data)
- throws IOException {
- final byte[] bytes = Constants.encode(data);
- final ObjectId id;
- try (ObjectInserter inserter = repo.newObjectInserter()) {
- id = inserter.insert(Constants.OBJ_BLOB, bytes);
- inserter.flush();
- }
- try {
- parse(id);
- fail("Object " + id.name() + " should not exist in test repository");
- } catch (MissingObjectException e) {
- // Ok
- }
- try (RevWalk revWalk = new RevWalk(repo)) {
- return revWalk.lookupBlob(id);
- }
- }
- }
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