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/*
* Copyright (C) 2017, 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.pgm.debug;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import org.eclipse.jgit.internal.storage.io.BlockSource;
import org.eclipse.jgit.internal.storage.reftable.RefCursor;
import org.eclipse.jgit.internal.storage.reftable.ReftableReader;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefComparator;
import org.eclipse.jgit.lib.TextProgressMonitor;
import org.eclipse.jgit.pgm.Command;
import org.eclipse.jgit.pgm.TextBuiltin;
import org.kohsuke.args4j.Argument;
@Command
class VerifyReftable extends TextBuiltin {
private static final long SEED1 = 0xaba8bb4de4caf86cL;
private static final long SEED2 = 0x28bb5c25ad43ecb5L;
@Argument(index = 0)
private String lsRemotePath;
@Argument(index = 1)
private String reftablePath;
/** {@inheritDoc} */
@Override
protected void run() throws Exception {
List<Ref> refs = WriteReftable.readRefs(lsRemotePath);
try (FileInputStream in = new FileInputStream(reftablePath);
BlockSource src = BlockSource.from(in);
ReftableReader reader = new ReftableReader(src)) {
scan(refs, reader);
seek(refs, reader);
byId(refs, reader);
}
}
@SuppressWarnings("nls")
private void scan(List<Ref> refs, ReftableReader reader)
throws IOException {
errw.print(String.format("%-20s", "sequential scan..."));
errw.flush();
try (RefCursor rc = reader.allRefs()) {
for (Ref exp : refs) {
verify(exp, rc);
}
if (rc.next()) {
throw die("expected end of table");
}
}
errw.println(" OK");
}
@SuppressWarnings("nls")
private void seek(List<Ref> refs, ReftableReader reader)
throws IOException {
List<Ref> rnd = new ArrayList<>(refs);
Collections.shuffle(rnd, new Random(SEED1));
TextProgressMonitor pm = new TextProgressMonitor(errw);
pm.beginTask("random seek", rnd.size());
for (Ref exp : rnd) {
try (RefCursor rc = reader.seekRef(exp.getName())) {
verify(exp, rc);
if (rc.next()) {
throw die("should not have ref after " + exp.getName());
}
}
pm.update(1);
}
pm.endTask();
}
@SuppressWarnings("nls")
private void byId(List<Ref> refs, ReftableReader reader)
throws IOException {
Map<ObjectId, List<Ref>> want = groupById(refs);
List<List<Ref>> rnd = new ArrayList<>(want.values());
Collections.shuffle(rnd, new Random(SEED2));
TextProgressMonitor pm = new TextProgressMonitor(errw);
pm.beginTask("byObjectId", rnd.size());
for (List<Ref> exp : rnd) {
Collections.sort(exp, RefComparator.INSTANCE);
ObjectId id = exp.get(0).getObjectId();
try (RefCursor rc = reader.byObjectId(id)) {
for (Ref r : exp) {
verify(r, rc);
}
}
pm.update(1);
}
pm.endTask();
}
private static Map<ObjectId, List<Ref>> groupById(List<Ref> refs) {
Map<ObjectId, List<Ref>> m = new HashMap<>();
for (Ref r : refs) {
ObjectId id = r.getObjectId();
if (id != null) {
List<Ref> c = m.get(id);
if (c == null) {
c = new ArrayList<>(2);
m.put(id, c);
}
c.add(r);
}
}
return m;
}
@SuppressWarnings("nls")
private void verify(Ref exp, RefCursor rc) throws IOException {
if (!rc.next()) {
throw die("ended before " + exp.getName());
}
Ref act = rc.getRef();
if (!exp.getName().equals(act.getName())) {
throw die(String.format("expected %s, found %s",
exp.getName(),
act.getName()));
}
if (exp.isSymbolic()) {
if (!act.isSymbolic()) {
throw die("expected " + act.getName() + " to be symbolic");
}
if (!exp.getTarget().getName().equals(act.getTarget().getName())) {
throw die(String.format("expected %s to be %s, found %s",
exp.getName(),
exp.getLeaf().getName(),
act.getLeaf().getName()));
}
return;
}
if (!AnyObjectId.equals(exp.getObjectId(), act.getObjectId())) {
throw die(String.format("expected %s to be %s, found %s",
exp.getName(),
id(exp.getObjectId()),
id(act.getObjectId())));
}
if (exp.getPeeledObjectId() != null
&& !AnyObjectId.equals(exp.getPeeledObjectId(), act.getPeeledObjectId())) {
throw die(String.format("expected %s to be %s, found %s",
exp.getName(),
id(exp.getPeeledObjectId()),
id(act.getPeeledObjectId())));
}
}
@SuppressWarnings("nls")
private static String id(ObjectId id) {
return id != null ? id.name() : "<null>";
}
}
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