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/*
* Copyright (C) 2023, 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_KEY_MIN_BYTES_OBJ_SIZE_INDEX;
import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_PACK_SECTION;
import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
import static org.eclipse.jgit.lib.Constants.OBJ_COMMIT;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.jgit.internal.storage.dfs.DfsObjDatabase.PackSource;
import org.eclipse.jgit.internal.storage.dfs.DfsReader.PackLoadListener;
import org.eclipse.jgit.internal.storage.pack.PackExt;
import org.eclipse.jgit.junit.JGitTestUtil;
import org.eclipse.jgit.junit.TestRng;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.junit.Before;
import org.junit.Test;
public class DfsReaderTest {
InMemoryRepository db;
@Before
public void setUp() {
db = new InMemoryRepository(new DfsRepositoryDescription("test"));
// These tests assume the object size index is enabled.
db.getObjectDatabase().getReaderOptions().setUseObjectSizeIndex(true);
}
@Test
public void getObjectSize_noIndex_blob() throws IOException {
ObjectId obj = insertBlobWithSize(100);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
long size = ctx.getObjectSize(obj, OBJ_BLOB);
assertEquals(100, size);
}
}
@Test
public void getObjectSize_noIndex_commit() throws IOException {
ObjectId obj = insertObjectWithSize(OBJ_COMMIT, 110);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
long size = ctx.getObjectSize(obj, OBJ_COMMIT);
assertEquals(110, size);
}
}
@Test
public void getObjectSize_index_indexedBlob() throws IOException {
setObjectSizeIndexMinBytes(100);
ObjectId obj = insertBlobWithSize(200);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
long size = ctx.getObjectSize(obj, OBJ_BLOB);
assertEquals(200, size);
}
}
@Test
public void getObjectSize_index_nonIndexedBlob() throws IOException {
setObjectSizeIndexMinBytes(100);
ObjectId obj = insertBlobWithSize(50);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
long size = ctx.getObjectSize(obj, OBJ_BLOB);
assertEquals(50, size);
}
}
@Test
public void getObjectSize_index_commit() throws IOException {
setObjectSizeIndexMinBytes(100);
insertBlobWithSize(110);
ObjectId obj = insertObjectWithSize(OBJ_COMMIT, 120);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
long size = ctx.getObjectSize(obj, OBJ_COMMIT);
assertEquals(120, size);
}
}
@Test
public void isNotLargerThan_objAboveThreshold() throws IOException {
setObjectSizeIndexMinBytes(100);
ObjectId obj = insertBlobWithSize(200);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
assertFalse("limit < threshold < obj",
ctx.isNotLargerThan(obj, OBJ_BLOB, 50));
assertEquals(1, ctx.stats.isNotLargerThanCallCount);
assertEquals(1, ctx.stats.objectSizeIndexHit);
assertEquals(0, ctx.stats.objectSizeIndexMiss);
assertFalse("limit = threshold < obj",
ctx.isNotLargerThan(obj, OBJ_BLOB, 100));
assertEquals(2, ctx.stats.isNotLargerThanCallCount);
assertEquals(2, ctx.stats.objectSizeIndexHit);
assertEquals(0, ctx.stats.objectSizeIndexMiss);
assertFalse("threshold < limit < obj",
ctx.isNotLargerThan(obj, OBJ_BLOB, 150));
assertEquals(3, ctx.stats.isNotLargerThanCallCount);
assertEquals(3, ctx.stats.objectSizeIndexHit);
assertEquals(0, ctx.stats.objectSizeIndexMiss);
assertTrue("threshold < limit = obj",
ctx.isNotLargerThan(obj, OBJ_BLOB, 200));
assertEquals(4, ctx.stats.isNotLargerThanCallCount);
assertEquals(4, ctx.stats.objectSizeIndexHit);
assertEquals(0, ctx.stats.objectSizeIndexMiss);
assertTrue("threshold < obj < limit",
ctx.isNotLargerThan(obj, OBJ_BLOB, 250));
assertEquals(5, ctx.stats.isNotLargerThanCallCount);
assertEquals(5, ctx.stats.objectSizeIndexHit);
assertEquals(0, ctx.stats.objectSizeIndexMiss);
}
}
@Test
public void isNotLargerThan_objBelowThreshold() throws IOException {
setObjectSizeIndexMinBytes(100);
insertBlobWithSize(1000); // index not empty
ObjectId obj = insertBlobWithSize(50);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
assertFalse("limit < obj < threshold",
ctx.isNotLargerThan(obj, OBJ_BLOB, 10));
assertEquals(1, ctx.stats.isNotLargerThanCallCount);
assertEquals(0, ctx.stats.objectSizeIndexHit);
assertEquals(1, ctx.stats.objectSizeIndexMiss);
assertTrue("limit = obj < threshold",
ctx.isNotLargerThan(obj, OBJ_BLOB, 50));
assertEquals(2, ctx.stats.isNotLargerThanCallCount);
assertEquals(0, ctx.stats.objectSizeIndexHit);
assertEquals(2, ctx.stats.objectSizeIndexMiss);
assertTrue("obj < limit < threshold",
ctx.isNotLargerThan(obj, OBJ_BLOB, 80));
assertEquals(3, ctx.stats.isNotLargerThanCallCount);
assertEquals(0, ctx.stats.objectSizeIndexHit);
assertEquals(3, ctx.stats.objectSizeIndexMiss);
assertTrue("obj < limit = threshold",
ctx.isNotLargerThan(obj, OBJ_BLOB, 100));
assertEquals(4, ctx.stats.isNotLargerThanCallCount);
assertEquals(0, ctx.stats.objectSizeIndexHit);
assertEquals(4, ctx.stats.objectSizeIndexMiss);
assertTrue("obj < threshold < limit",
ctx.isNotLargerThan(obj, OBJ_BLOB, 120));
assertEquals(5, ctx.stats.isNotLargerThanCallCount);
assertEquals(0, ctx.stats.objectSizeIndexHit);
assertEquals(5, ctx.stats.objectSizeIndexMiss);
}
}
@Test
public void isNotLargerThan_emptyIdx() throws IOException {
setObjectSizeIndexMinBytes(100);
ObjectId obj = insertBlobWithSize(10);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
assertFalse(ctx.isNotLargerThan(obj, OBJ_BLOB, 0));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 10));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 40));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 50));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 100));
assertEquals(5, ctx.stats.isNotLargerThanCallCount);
assertEquals(5, ctx.stats.objectSizeIndexMiss);
assertEquals(0, ctx.stats.objectSizeIndexHit);
}
}
@Test
public void isNotLargerThan_noObjectSizeIndex() throws IOException {
setObjectSizeIndexMinBytes(-1);
ObjectId obj = insertBlobWithSize(10);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
assertFalse(ctx.isNotLargerThan(obj, OBJ_BLOB, 0));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 10));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 40));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 50));
assertTrue(ctx.isNotLargerThan(obj, OBJ_BLOB, 100));
assertEquals(5, ctx.stats.isNotLargerThanCallCount);
assertEquals(0, ctx.stats.objectSizeIndexMiss);
assertEquals(0, ctx.stats.objectSizeIndexHit);
}
}
@Test
public void packLoadListener_noInvocations() throws IOException {
insertBlobWithSize(100);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
CounterPackLoadListener listener = new CounterPackLoadListener();
ctx.addPackLoadListener(listener);
assertEquals(null, listener.callsPerExt.get(PackExt.INDEX));
}
}
@Test
public void packLoadListener_has_openIdx() throws IOException {
ObjectId obj = insertBlobWithSize(100);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
CounterPackLoadListener listener = new CounterPackLoadListener();
ctx.addPackLoadListener(listener);
boolean has = ctx.has(obj);
assertTrue(has);
assertEquals(Integer.valueOf(1),
listener.callsPerExt.get(PackExt.INDEX));
}
}
@Test
public void packLoadListener_notLargerThan_openMultipleIndices()
throws IOException {
setObjectSizeIndexMinBytes(100);
ObjectId obj = insertBlobWithSize(200);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
CounterPackLoadListener listener = new CounterPackLoadListener();
ctx.addPackLoadListener(listener);
boolean notLargerThan = ctx.isNotLargerThan(obj, OBJ_BLOB, 1000);
assertTrue(notLargerThan);
assertEquals(Integer.valueOf(1),
listener.callsPerExt.get(PackExt.INDEX));
assertEquals(Integer.valueOf(1),
listener.callsPerExt.get(PackExt.OBJECT_SIZE_INDEX));
}
}
@Test
public void packLoadListener_has_openMultipleIndices() throws IOException {
setObjectSizeIndexMinBytes(100);
insertBlobWithSize(200);
insertBlobWithSize(230);
insertBlobWithSize(100);
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
CounterPackLoadListener listener = new CounterPackLoadListener();
ctx.addPackLoadListener(listener);
ObjectId oid = ObjectId
.fromString("aa48de2aa61d9dffa8a05439dc115fe82f10f129");
boolean has = ctx.has(oid);
assertFalse(has);
// Open 3 indices trying to find the pack
assertEquals(Integer.valueOf(3),
listener.callsPerExt.get(PackExt.INDEX));
}
}
@Test
public void packLoadListener_has_repeatedCalls_openMultipleIndices()
throws IOException {
// Two objects NOT in the repo
ObjectId oid = ObjectId
.fromString("aa48de2aa61d9dffa8a05439dc115fe82f10f129");
ObjectId oid2 = ObjectId
.fromString("aa48de2aa61d9dffa8a05439dc115fe82f10f130");
setObjectSizeIndexMinBytes(100);
insertBlobWithSize(200);
insertBlobWithSize(230);
insertBlobWithSize(100);
CounterPackLoadListener listener = new CounterPackLoadListener();
try (DfsReader ctx = db.getObjectDatabase().newReader()) {
ctx.addPackLoadListener(listener);
boolean has = ctx.has(oid);
ctx.has(oid);
ctx.has(oid2);
assertFalse(has);
// The 3 indices were loaded only once each
assertEquals(Integer.valueOf(3),
listener.callsPerExt.get(PackExt.INDEX));
}
}
private static class CounterPackLoadListener implements PackLoadListener {
final Map<PackExt, Integer> callsPerExt = new HashMap<>();
@SuppressWarnings("boxing")
@Override
public void onIndexLoad(String packName, PackSource src, PackExt ext,
long size, Object loadedIdx) {
callsPerExt.merge(ext, 1, Integer::sum);
}
@Override
public void onBlockLoad(String packName, PackSource src, PackExt ext,
long size, DfsBlockData dfsBlockData) {
// empty
}
}
private ObjectId insertBlobWithSize(int size) throws IOException {
return insertObjectWithSize(OBJ_BLOB, size);
}
private ObjectId insertObjectWithSize(int object_type, int size)
throws IOException {
TestRng testRng = new TestRng(JGitTestUtil.getName());
ObjectId oid;
try (ObjectInserter ins = db.newObjectInserter()) {
oid = ins.insert(object_type, testRng.nextBytes(size));
ins.flush();
}
return oid;
}
private void setObjectSizeIndexMinBytes(int threshold) {
db.getConfig().setInt(CONFIG_PACK_SECTION, null,
CONFIG_KEY_MIN_BYTES_OBJ_SIZE_INDEX, threshold);
}
}
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