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- /*
- * Copyright (C) 2011, Google Inc.
- * and other copyright owners as documented in the project's IP log.
- *
- * 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.storage.dht;
-
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.assertTrue;
-
- import java.util.ArrayList;
- import java.util.List;
-
- import org.eclipse.jgit.lib.MutableObjectId;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.transport.PackedObjectInfo;
- import org.eclipse.jgit.util.NB;
- import org.junit.Test;
-
- public class ChunkIndexTest {
- @Test
- public void testSingleObject_NotFound() throws DhtException {
- List<PackedObjectInfo> objs = list(object(1, 1));
- ChunkIndex idx = index(objs);
- assertEquals(-1, idx.findOffset(ObjectId.zeroId()));
- }
-
- @Test
- public void testSingleObject_Offset1() throws DhtException {
- assertEquals(header(0, 1), header(list(object(1, 0))));
-
- List<PackedObjectInfo> objs = list(object(0x1200, 255));
- ChunkIndex idx = index(objs);
-
- assertEquals(header(0, 1), header(objs));
- assertEquals(1, idx.getObjectCount());
- assertEquals(2 + 20 + 1, idx.getIndexSize());
-
- assertEquals(objs.get(0), idx.getObjectId(0));
- assertEquals(objs.get(0).getOffset(), idx.getOffset(0));
- assertEquals(objs.get(0).getOffset(), idx.findOffset(objs.get(0)));
- }
-
- @Test
- public void testSingleObject_Offset2() throws DhtException {
- assertEquals(header(0, 2), header(list(object(1, 1 << 8))));
-
- List<PackedObjectInfo> objs = list(object(0x1200, 0xab34));
- ChunkIndex idx = index(objs);
-
- assertEquals(header(0, 2), header(objs));
- assertEquals(1, idx.getObjectCount());
- assertEquals(2 + 20 + 2, idx.getIndexSize());
-
- assertEquals(objs.get(0), idx.getObjectId(0));
- assertEquals(objs.get(0).getOffset(), idx.getOffset(0));
- assertEquals(objs.get(0).getOffset(), idx.findOffset(objs.get(0)));
- }
-
- @Test
- public void testSingleObject_Offset3() throws DhtException {
- assertEquals(header(0, 3), header(list(object(1, 1 << 16))));
-
- List<PackedObjectInfo> objs = list(object(0x1200, 0xab1234));
- ChunkIndex idx = index(objs);
-
- assertEquals(header(0, 3), header(objs));
- assertEquals(1, idx.getObjectCount());
- assertEquals(2 + 20 + 3, idx.getIndexSize());
-
- assertEquals(objs.get(0), idx.getObjectId(0));
- assertEquals(objs.get(0).getOffset(), idx.getOffset(0));
- assertEquals(objs.get(0).getOffset(), idx.findOffset(objs.get(0)));
- }
-
- @Test
- public void testSingleObject_Offset4() throws DhtException {
- assertEquals(header(0, 4), header(list(object(1, 1 << 24))));
-
- List<PackedObjectInfo> objs = list(object(0x1200, 0x7bcdef42));
- ChunkIndex idx = index(objs);
-
- assertEquals(header(0, 4), header(objs));
- assertEquals(1, idx.getObjectCount());
- assertEquals(objs.get(0), idx.getObjectId(0));
-
- assertEquals(2 + 20 + 4, idx.getIndexSize());
- assertEquals(objs.get(0).getOffset(), idx.getOffset(0));
- assertEquals(objs.get(0).getOffset(), idx.findOffset(objs.get(0)));
- }
-
- @Test
- public void testObjects3() throws DhtException {
- List<PackedObjectInfo> objs = objects(2, 3, 1);
- ChunkIndex idx = index(objs);
-
- assertEquals(header(0, 1), header(objs));
- assertEquals(3, idx.getObjectCount());
- assertEquals(2 + 3 * 20 + 3 * 1, idx.getIndexSize());
- assertTrue(isSorted(objs));
-
- for (int i = 0; i < objs.size(); i++) {
- assertEquals(objs.get(i), idx.getObjectId(i));
- assertEquals(objs.get(i).getOffset(), idx.getOffset(i));
- assertEquals(objs.get(i).getOffset(), idx.findOffset(objs.get(i)));
- }
- }
-
- @Test
- public void testObjects255_SameBucket() throws DhtException {
- int[] ints = new int[255];
- for (int i = 0; i < 255; i++)
- ints[i] = i;
- List<PackedObjectInfo> objs = objects(ints);
- ChunkIndex idx = index(objs);
-
- assertEquals(header(1, 2), header(objs));
- assertEquals(255, idx.getObjectCount());
- assertEquals(2 + 256 + 255 * 20 + 255 * 2 //
- + 12 + 4 * 256, idx.getIndexSize());
- assertTrue(isSorted(objs));
-
- for (int i = 0; i < objs.size(); i++) {
- assertEquals(objs.get(i), idx.getObjectId(i));
- assertEquals(objs.get(i).getOffset(), idx.getOffset(i));
- assertEquals(objs.get(i).getOffset(), idx.findOffset(objs.get(i)));
- }
- }
-
- @Test
- public void testObjects512_ManyBuckets() throws DhtException {
- int[] ints = new int[512];
- for (int i = 0; i < 256; i++) {
- ints[i] = (i << 8) | 0;
- ints[i + 256] = (i << 8) | 1;
- }
- List<PackedObjectInfo> objs = objects(ints);
- ChunkIndex idx = index(objs);
-
- assertEquals(header(1, 2), header(objs));
- assertEquals(512, idx.getObjectCount());
- assertEquals(2 + 256 + 512 * 20 + 512 * 2 //
- + 12 + 4 * 256, idx.getIndexSize());
- assertTrue(isSorted(objs));
-
- for (int i = 0; i < objs.size(); i++) {
- assertEquals(objs.get(i), idx.getObjectId(i));
- assertEquals(objs.get(i).getOffset(), idx.getOffset(i));
- assertEquals(objs.get(i).getOffset(), idx.findOffset(objs.get(i)));
- }
- }
-
- @Test
- public void testFanout2() throws DhtException {
- List<PackedObjectInfo> objs = new ArrayList<PackedObjectInfo>(65280);
- MutableObjectId idBuf = new MutableObjectId();
- for (int i = 0; i < 256; i++) {
- idBuf.setByte(2, i & 0xff);
- for (int j = 0; j < 255; j++) {
- idBuf.setByte(3, j & 0xff);
- PackedObjectInfo oe = new PackedObjectInfo(idBuf);
- oe.setOffset((i << 8) | j);
- objs.add(oe);
- }
- }
- ChunkIndex idx = index(objs);
-
- assertEquals(header(2, 2), header(objs));
- assertEquals(256 * 255, idx.getObjectCount());
- assertTrue(isSorted(objs));
-
- for (int i = 0; i < objs.size(); i++) {
- assertEquals(objs.get(i), idx.getObjectId(i));
- assertEquals(objs.get(i).getOffset(), idx.getOffset(i));
- assertEquals(objs.get(i).getOffset(), idx.findOffset(objs.get(i)));
- }
- }
-
- @Test
- public void testFanout3() throws DhtException {
- List<PackedObjectInfo> objs = new ArrayList<PackedObjectInfo>(1 << 16);
- MutableObjectId idBuf = new MutableObjectId();
- for (int i = 0; i < 256; i++) {
- idBuf.setByte(2, i & 0xff);
- for (int j = 0; j < 256; j++) {
- idBuf.setByte(3, j & 0xff);
- PackedObjectInfo oe = new PackedObjectInfo(idBuf);
- oe.setOffset((i << 8) | j);
- objs.add(oe);
- }
- }
- ChunkIndex idx = index(objs);
-
- assertEquals(header(3, 2), header(objs));
- assertEquals(256 * 256, idx.getObjectCount());
- assertTrue(isSorted(objs));
-
- for (int i = 0; i < objs.size(); i++) {
- assertEquals(objs.get(i), idx.getObjectId(i));
- assertEquals(objs.get(i).getOffset(), idx.getOffset(i));
- assertEquals(objs.get(i).getOffset(), idx.findOffset(objs.get(i)));
- }
- }
-
- @Test
- public void testObjects65280_ManyBuckets() throws DhtException {
- List<PackedObjectInfo> objs = new ArrayList<PackedObjectInfo>(65280);
- MutableObjectId idBuf = new MutableObjectId();
- for (int i = 0; i < 256; i++) {
- idBuf.setByte(0, i & 0xff);
- for (int j = 0; j < 255; j++) {
- idBuf.setByte(3, j & 0xff);
- PackedObjectInfo oe = new PackedObjectInfo(idBuf);
- oe.setOffset((i << 8) | j);
- objs.add(oe);
- }
- }
- ChunkIndex idx = index(objs);
-
- assertEquals(header(1, 2), header(objs));
- assertEquals(65280, idx.getObjectCount());
- assertTrue(isSorted(objs));
-
- for (int i = 0; i < objs.size(); i++) {
- assertEquals(objs.get(i), idx.getObjectId(i));
- assertEquals(objs.get(i).getOffset(), idx.getOffset(i));
- assertEquals(objs.get(i).getOffset(), idx.findOffset(objs.get(i)));
- }
- }
-
- private boolean isSorted(List<PackedObjectInfo> objs) {
- PackedObjectInfo last = objs.get(0);
- for (int i = 1; i < objs.size(); i++) {
- PackedObjectInfo oe = objs.get(i);
- if (oe.compareTo(last) <= 0)
- return false;
- }
- return true;
- }
-
- private List<PackedObjectInfo> list(PackedObjectInfo... all) {
- List<PackedObjectInfo> objs = new ArrayList<PackedObjectInfo>();
- for (PackedObjectInfo o : all)
- objs.add(o);
- return objs;
- }
-
- private int header(int fanoutTable, int offsetTable) {
- return (0x01 << 8) | (fanoutTable << 3) | offsetTable;
- }
-
- private int header(List<PackedObjectInfo> objs) {
- byte[] index = ChunkIndex.create(objs);
- return NB.decodeUInt16(index, 0);
- }
-
- private ChunkIndex index(List<PackedObjectInfo> objs) throws DhtException {
- ChunkKey key = null;
- byte[] index = ChunkIndex.create(objs);
- return ChunkIndex.fromBytes(key, index, 0, index.length);
- }
-
- private List<PackedObjectInfo> objects(int... values) {
- List<PackedObjectInfo> objs = new ArrayList<PackedObjectInfo>();
- for (int i = 0; i < values.length; i++)
- objs.add(object(values[i], i * 10));
- return objs;
- }
-
- private PackedObjectInfo object(int id, int off) {
- MutableObjectId idBuf = new MutableObjectId();
- idBuf.setByte(0, (id >>> 8) & 0xff);
- idBuf.setByte(1, id & 0xff);
-
- PackedObjectInfo obj = new PackedObjectInfo(idBuf);
- obj.setOffset(off);
- return obj;
- }
- }
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