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// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.change;
import static java.util.stream.Collectors.joining;
import com.google.gerrit.extensions.restapi.BinaryResult;
import com.google.gerrit.extensions.restapi.IdString;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.reviewdb.server.ReviewDbUtil;
import com.google.gerrit.server.CommentsUtil;
import com.google.gerrit.server.change.Rebuild.Input;
import com.google.gerrit.server.notedb.ChangeBundle;
import com.google.gerrit.server.notedb.ChangeBundleReader;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.notedb.NotesMigration;
import com.google.gerrit.server.notedb.rebuild.ChangeRebuilder;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.List;
import org.eclipse.jgit.errors.ConfigInvalidException;
@Singleton
public class Rebuild implements RestModifyView<ChangeResource, Input> {
public static class Input {}
private final Provider<ReviewDb> db;
private final NotesMigration migration;
private final ChangeRebuilder rebuilder;
private final ChangeBundleReader bundleReader;
private final CommentsUtil commentsUtil;
private final ChangeNotes.Factory notesFactory;
@Inject
Rebuild(
Provider<ReviewDb> db,
NotesMigration migration,
ChangeRebuilder rebuilder,
ChangeBundleReader bundleReader,
CommentsUtil commentsUtil,
ChangeNotes.Factory notesFactory) {
this.db = db;
this.migration = migration;
this.rebuilder = rebuilder;
this.bundleReader = bundleReader;
this.commentsUtil = commentsUtil;
this.notesFactory = notesFactory;
}
@Override
public BinaryResult apply(ChangeResource rsrc, Input input)
throws ResourceNotFoundException, IOException, OrmException, ConfigInvalidException {
if (!migration.commitChangeWrites()) {
throw new ResourceNotFoundException();
}
if (!migration.readChanges()) {
// ChangeBundle#fromNotes currently doesn't work if reading isn't enabled,
// so don't attempt a diff.
rebuild(rsrc);
return BinaryResult.create("Rebuilt change successfully");
}
// Not the same transaction as the rebuild, so may result in spurious diffs
// in the case of races. This should be easy enough to detect by rerunning.
ChangeBundle reviewDbBundle =
bundleReader.fromReviewDb(ReviewDbUtil.unwrapDb(db.get()), rsrc.getId());
rebuild(rsrc);
ChangeNotes notes = notesFactory.create(db.get(), rsrc.getChange().getProject(), rsrc.getId());
ChangeBundle noteDbBundle = ChangeBundle.fromNotes(commentsUtil, notes);
List<String> diffs = reviewDbBundle.differencesFrom(noteDbBundle);
if (diffs.isEmpty()) {
return BinaryResult.create("No differences between ReviewDb and NoteDb");
}
return BinaryResult.create(
diffs.stream().collect(joining("\n", "Differences between ReviewDb and NoteDb:\n", "\n")));
}
private void rebuild(ChangeResource rsrc)
throws ResourceNotFoundException, OrmException, IOException {
try {
rebuilder.rebuild(db.get(), rsrc.getId());
} catch (NoSuchChangeException e) {
throw new ResourceNotFoundException(IdString.fromDecoded(rsrc.getId().toString()));
}
}
}
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