Originally-by: Robin Rosenberg <robin.rosenberg@xxxxxxxxxx>
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
.../org/spearce/jgit/lib/ConcurrentRepackTest.java | 206 ++++++++++++++++++++
1 files changed, 206 insertions(+), 0 deletions(-)
create mode 100644 org.spearce.jgit.test/tst/org/spearce/jgit/lib/ConcurrentRepackTest.java
diff --git a/org.spearce.jgit.test/tst/org/spearce/jgit/lib/ConcurrentRepackTest.java b/org.spearce.jgit.test/tst/org/spearce/jgit/lib/ConcurrentRepackTest.java
new file mode 100644
index 0000000..6eb368c
--- /dev/null
+++ b/org.spearce.jgit.test/tst/org/spearce/jgit/lib/ConcurrentRepackTest.java
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2009, Robin Rosenberg <robin.rosenberg@xxxxxxxxxx>
+ * Copyright (C) 2009, Google Inc.
+ *
+ * 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 Git Development Community 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.spearce.jgit.lib;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import org.spearce.jgit.errors.IncorrectObjectTypeException;
+import org.spearce.jgit.errors.MissingObjectException;
+import org.spearce.jgit.revwalk.RevObject;
+import org.spearce.jgit.revwalk.RevWalk;
+
+public class ConcurrentRepackTest extends RepositoryTestCase {
+ public void setUp() throws Exception {
+ WindowCacheConfig windowCacheConfig = new WindowCacheConfig();
+ windowCacheConfig.setPackedGitOpenFiles(1);
+ WindowCache.reconfigure(windowCacheConfig);
+ super.setUp();
+ }
+
+ protected void tearDown() throws Exception {
+ super.tearDown();
+ WindowCacheConfig windowCacheConfig = new WindowCacheConfig();
+ WindowCache.reconfigure(windowCacheConfig);
+ }
+
+ public void testObjectInNewPack() throws IncorrectObjectTypeException,
+ IOException {
+ // Create a new object in a new pack, and test that it is present.
+ //
+ final Repository eden = createNewEmptyRepo();
+ final RevObject o1 = writeBlob(eden, "o1");
+ pack(eden, o1);
+ assertEquals(o1.name(), parse(o1).name());
+ }
+
+ 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 = createNewEmptyRepo();
+ 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());
+ }
+
+ public void testObjectMovedWithinPack()
+ throws IncorrectObjectTypeException, IOException {
+ // Create an object and pack it.
+ //
+ final Repository eden = createNewEmptyRepo();
+ 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");
+ final PackWriter pw = new PackWriter(eden, NullProgressMonitor.INSTANCE);
+ 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());
+ }
+
+ private static void whackCache() {
+ final WindowCacheConfig config = new WindowCacheConfig();
+
+ config.setPackedGitOpenFiles(0);
+ WindowCache.reconfigure(config);
+
+ config.setPackedGitOpenFiles(1);
+ WindowCache.reconfigure(config);
+ }
+
+ private RevObject parse(final AnyObjectId id)
+ throws MissingObjectException, IOException {
+ return new RevWalk(db).parseAny(id);
+ }
+
+ private File[] pack(final Repository src, final RevObject... list)
+ throws IOException {
+ final PackWriter pw = new PackWriter(src, NullProgressMonitor.INSTANCE);
+ for (final RevObject o : list) {
+ pw.addObject(o);
+ }
+
+ final ObjectId name = pw.computeName();
+ final File packFile = fullPackFileName(name, ".pack");
+ final File idxFile = fullPackFileName(name, ".idx");
+ final File[] files = new File[] { packFile, idxFile };
+ write(files, pw);
+ return files;
+ }
+
+ private static void write(final File[] files, final PackWriter pw)
+ throws IOException {
+ FileOutputStream out;
+
+ out = new FileOutputStream(files[0]);
+ try {
+ pw.writePack(out);
+ } finally {
+ out.close();
+ }
+
+ out = new FileOutputStream(files[1]);
+ try {
+ pw.writeIndex(out);
+ } finally {
+ out.close();
+ }
+ }
+
+ private static void delete(final File[] list) {
+ for (final File f : list) {
+ f.delete();
+ assertFalse(f + " was removed", f.exists());
+ }
+ }
+
+ private File fullPackFileName(final ObjectId name, final String suffix) {
+ final File packdir = new File(db.getObjectsDirectory(), "pack");
+ return new File(packdir, "pack-" + name.name() + suffix);
+ }
+
+ private RevObject writeBlob(final Repository repo, final String data)
+ throws IOException {
+ final RevWalk revWalk = new RevWalk(repo);
+ final byte[] bytes = data.getBytes(Constants.CHARACTER_ENCODING);
+ final ObjectWriter ow = new ObjectWriter(repo);
+ final ObjectId id = ow.writeBlob(bytes);
+ try {
+ parse(id);
+ fail("Object " + id.name() + " should not exist in test repository");
+ } catch (MissingObjectException e) {
+ // Ok
+ }
+ return revWalk.lookupBlob(id);
+ }
+}
--
1.6.3.rc1.188.ga02b
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