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- /*
- * Copyright (C) 2012, Roberto Tyley <roberto.tyley@gmail.com>
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.internal.storage.file;
-
- import static java.nio.charset.StandardCharsets.UTF_8;
- import static org.junit.Assert.assertFalse;
- import static org.junit.Assert.assertNull;
- import static org.junit.Assert.assertThrows;
- import static org.junit.Assert.assertTrue;
- import static org.mockito.ArgumentMatchers.any;
- import static org.mockito.Mockito.mock;
- import static org.mockito.Mockito.verify;
-
- import java.io.File;
- import java.io.IOException;
- import java.io.PrintWriter;
- import java.text.MessageFormat;
- import java.util.Collection;
- import java.util.Collections;
- import java.util.Set;
- import java.util.concurrent.Callable;
- import java.util.concurrent.ExecutorService;
- import java.util.concurrent.Executors;
- import java.util.concurrent.Future;
-
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.junit.RepositoryTestCase;
- import org.eclipse.jgit.lib.ConfigConstants;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.storage.file.FileBasedConfig;
- import org.eclipse.jgit.util.FS;
- import org.junit.Assume;
- import org.junit.Test;
- import org.mockito.Mockito;
-
- public class ObjectDirectoryTest extends RepositoryTestCase {
-
- @Test
- public void testConcurrentInsertionOfBlobsToTheSameNewFanOutDirectory()
- throws Exception {
- ExecutorService e = Executors.newCachedThreadPool();
- for (int i=0; i < 100; ++i) {
- ObjectDirectory dir = createBareRepository().getObjectDatabase();
- for (Future f : e.invokeAll(blobInsertersForTheSameFanOutDir(dir))) {
- f.get();
- }
- }
- }
-
- /**
- * Test packfile scanning while a gc is done from the outside (different
- * process or different Repository instance). This situation occurs e.g. if
- * a gerrit server is serving fetch requests while native git is doing a
- * garbage collection. The test shows that when core.trustfolderstat==true
- * jgit may miss to detect that a new packfile was created. This situation
- * is persistent until a new full rescan of the pack directory is triggered.
- *
- * The test works with two Repository instances working on the same disk
- * location. One (db) for all write operations (creating commits, doing gc)
- * and another one (receivingDB) which just reads and which in the end shows
- * the bug
- *
- * @throws Exception
- */
- @Test
- public void testScanningForPackfiles() throws Exception {
- ObjectId unknownID = ObjectId
- .fromString("c0ffee09d0b63d694bf49bc1e6847473f42d4a8c");
- GC gc = new GC(db);
- gc.setExpireAgeMillis(0);
- gc.setPackExpireAgeMillis(0);
-
- // the default repo db is used to create the objects. The receivingDB
- // repo is used to trigger gc's
- try (FileRepository receivingDB = new FileRepository(
- db.getDirectory())) {
- // set trustfolderstat to true. If set to false the test always
- // succeeds.
- FileBasedConfig cfg = receivingDB.getConfig();
- cfg.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
- ConfigConstants.CONFIG_KEY_TRUSTFOLDERSTAT, true);
- cfg.save();
-
- // setup a repo which has at least one pack file and trigger
- // scanning of the packs directory
- ObjectId id = commitFile("file.txt", "test", "master").getId();
- gc.gc();
- assertFalse(receivingDB.getObjectDatabase().has(unknownID));
- assertTrue(receivingDB.getObjectDatabase().hasPackedObject(id));
-
- // preparations
- File packsFolder = receivingDB.getObjectDatabase()
- .getPackDirectory();
- // prepare creation of a temporary file in the pack folder. This
- // simulates that a native git gc is happening starting to write
- // temporary files but has not yet finished
- File tmpFile = new File(packsFolder, "1.tmp");
- RevCommit id2 = commitFile("file.txt", "test2", "master");
- // wait until filesystem timer ticks. This raises probability that
- // the next statements are executed in the same tick as the
- // filesystem timer
- fsTick(null);
-
- // create a Temp file in the packs folder and trigger a rescan of
- // the packs folder. This lets receivingDB think it has scanned the
- // packs folder at the current fs timestamp t1. The following gc
- // will create new files which have the same timestamp t1 but this
- // will not update the mtime of the packs folder. Because of that
- // JGit will not rescan the packs folder later on and fails to see
- // the pack file created during gc.
- assertTrue(tmpFile.createNewFile());
- assertFalse(receivingDB.getObjectDatabase().has(unknownID));
-
- // trigger a gc. This will create packfiles which have likely the
- // same mtime than the packfolder
- gc.gc();
-
- // To deal with racy-git situations JGit's Filesnapshot class will
- // report a file/folder potentially dirty if
- // cachedLastReadTime-cachedLastModificationTime < filesystem
- // timestamp resolution. This causes JGit to always rescan a file
- // after modification. But: this was true only if the difference
- // between current system time and cachedLastModification time was
- // less than 2500ms. If the modification is more than 2500ms ago we
- // may have reported a file/folder to be clean although it has not
- // been rescanned. A bug. To show the bug we sleep for more than
- // 2500ms
- Thread.sleep(2600);
-
- File[] ret = packsFolder.listFiles(
- (File dir, String name) -> name.endsWith(".pack"));
- assertTrue(ret != null && ret.length == 1);
- FS fs = db.getFS();
- Assume.assumeTrue(fs.lastModifiedInstant(tmpFile)
- .equals(fs.lastModifiedInstant(ret[0])));
-
- // all objects are in a new packfile but we will not detect it
- assertFalse(receivingDB.getObjectDatabase().has(unknownID));
- assertTrue(receivingDB.getObjectDatabase().has(id2));
- }
- }
-
- @Test
- public void testShallowFile()
- throws Exception {
- FileRepository repository = createBareRepository();
- ObjectDirectory dir = repository.getObjectDatabase();
-
- String commit = "d3148f9410b071edd4a4c85d2a43d1fa2574b0d2";
- try (PrintWriter writer = new PrintWriter(
- new File(repository.getDirectory(), Constants.SHALLOW),
- UTF_8.name())) {
- writer.println(commit);
- }
- Set<ObjectId> shallowCommits = dir.getShallowCommits();
- assertTrue(shallowCommits.remove(ObjectId.fromString(commit)));
- assertTrue(shallowCommits.isEmpty());
- }
-
- @Test
- public void testOpenLooseObjectSuppressStaleFileHandleException()
- throws Exception {
- ObjectId id = ObjectId
- .fromString("873fb8d667d05436d728c52b1d7a09528e6eb59b");
- WindowCursor curs = new WindowCursor(db.getObjectDatabase());
-
- LooseObjects mock = mock(LooseObjects.class);
- UnpackedObjectCache unpackedObjectCacheMock = mock(
- UnpackedObjectCache.class);
-
- Mockito.when(mock.getObjectLoader(any(), any(), any()))
- .thenThrow(new IOException("Stale File Handle"));
- Mockito.when(mock.open(curs, id)).thenCallRealMethod();
- Mockito.when(mock.unpackedObjectCache())
- .thenReturn(unpackedObjectCacheMock);
-
- assertNull(mock.open(curs, id));
- verify(unpackedObjectCacheMock).remove(id);
- }
-
- @Test
- public void testOpenLooseObjectPropagatesIOExceptions() throws Exception {
- ObjectId id = ObjectId
- .fromString("873fb8d667d05436d728c52b1d7a09528e6eb59b");
- WindowCursor curs = new WindowCursor(db.getObjectDatabase());
-
- LooseObjects mock = mock(LooseObjects.class);
-
- Mockito.when(mock.getObjectLoader(any(), any(), any()))
- .thenThrow(new IOException("some IO failure"));
- Mockito.when(mock.open(curs, id)).thenCallRealMethod();
-
- assertThrows(IOException.class, () -> mock.open(curs, id));
- }
-
- @Test
- public void testShallowFileCorrupt() throws Exception {
- FileRepository repository = createBareRepository();
- ObjectDirectory dir = repository.getObjectDatabase();
-
- String commit = "X3148f9410b071edd4a4c85d2a43d1fa2574b0d2";
- try (PrintWriter writer = new PrintWriter(
- new File(repository.getDirectory(), Constants.SHALLOW),
- UTF_8.name())) {
- writer.println(commit);
- }
- assertThrows(
- MessageFormat.format(JGitText.get().badShallowLine, commit),
- IOException.class, () -> dir.getShallowCommits());
- }
-
- private Collection<Callable<ObjectId>> blobInsertersForTheSameFanOutDir(
- final ObjectDirectory dir) {
- Callable<ObjectId> callable = () -> dir.newInserter()
- .insert(Constants.OBJ_BLOB, new byte[0]);
- return Collections.nCopies(4, callable);
- }
-
- }
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