com.google.gerrit.server.notedb.RobotCommentUpdate Maven / Gradle / Ivy
// 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.notedb;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.google.gerrit.entities.RefNames.robotCommentsRef;
import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
import com.google.common.collect.Sets;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.RobotComment;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.server.GerritPersonIdent;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.assistedinject.AssistedInject;
import java.io.IOException;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.CommitBuilder;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.notes.NoteMap;
import org.eclipse.jgit.revwalk.RevWalk;
/**
* A single delta to apply atomically to a change.
*
* This delta contains only robot comments on a single patch set of a change by a single author.
* This delta will become a single commit in the repository.
*
*
This class is not thread safe.
*/
public class RobotCommentUpdate extends AbstractChangeUpdate {
public interface Factory {
RobotCommentUpdate create(
ChangeNotes notes,
@Assisted("effective") Account.Id accountId,
@Assisted("real") Account.Id realAccountId,
PersonIdent authorIdent,
Instant when);
RobotCommentUpdate create(
Change change,
@Assisted("effective") Account.Id accountId,
@Assisted("real") Account.Id realAccountId,
PersonIdent authorIdent,
Instant when);
}
private List put = new ArrayList<>();
@SuppressWarnings("UnusedMethod")
@AssistedInject
private RobotCommentUpdate(
@GerritPersonIdent PersonIdent serverIdent,
ChangeNoteUtil noteUtil,
@Assisted ChangeNotes notes,
@Assisted("effective") Account.Id accountId,
@Assisted("real") Account.Id realAccountId,
@Assisted PersonIdent authorIdent,
@Assisted Instant when) {
super(noteUtil, serverIdent, notes, null, accountId, realAccountId, authorIdent, when);
}
@SuppressWarnings("UnusedMethod")
@AssistedInject
private RobotCommentUpdate(
@GerritPersonIdent PersonIdent serverIdent,
ChangeNoteUtil noteUtil,
@Assisted Change change,
@Assisted("effective") Account.Id accountId,
@Assisted("real") Account.Id realAccountId,
@Assisted PersonIdent authorIdent,
@Assisted Instant when) {
super(noteUtil, serverIdent, null, change, accountId, realAccountId, authorIdent, when);
}
public void putComment(RobotComment c) {
verifyComment(c);
put.add(c);
}
@Nullable
private CommitBuilder storeCommentsInNotes(
RevWalk rw, ObjectInserter ins, ObjectId curr, CommitBuilder cb)
throws ConfigInvalidException, IOException {
RevisionNoteMap rnm = getRevisionNoteMap(rw, curr);
Set updatedRevs = Sets.newHashSetWithExpectedSize(rnm.revisionNotes.size());
RevisionNoteBuilder.Cache cache = new RevisionNoteBuilder.Cache(rnm);
for (RobotComment c : put) {
cache.get(c.getCommitId()).putComment(c);
}
Map builders = cache.getBuilders();
boolean touchedAnyRevs = false;
boolean hasComments = false;
for (Map.Entry e : builders.entrySet()) {
ObjectId id = e.getKey();
updatedRevs.add(id);
byte[] data = e.getValue().build(noteUtil);
if (!Arrays.equals(data, e.getValue().baseRaw)) {
touchedAnyRevs = true;
}
if (data.length == 0) {
rnm.noteMap.remove(id);
} else {
hasComments = true;
ObjectId dataBlob = ins.insert(OBJ_BLOB, data);
rnm.noteMap.set(id, dataBlob);
}
}
// If we didn't touch any notes, tell the caller this was a no-op update. We
// couldn't have done this in isEmpty() below because we hadn't read the old
// data yet.
if (!touchedAnyRevs) {
return NO_OP_UPDATE;
}
// If we touched every revision and there are no comments left, tell the
// caller to delete the entire ref.
boolean touchedAllRevs = updatedRevs.equals(rnm.revisionNotes.keySet());
if (touchedAllRevs && !hasComments) {
return null;
}
cb.setTreeId(rnm.noteMap.writeTree(ins));
return cb;
}
private RevisionNoteMap getRevisionNoteMap(RevWalk rw, ObjectId curr)
throws ConfigInvalidException, IOException {
if (curr.equals(ObjectId.zeroId())) {
return RevisionNoteMap.emptyMap();
}
// The old RobotCommentNotes already parsed the revision notes. We can reuse them as long as
// the ref hasn't advanced.
ChangeNotes changeNotes = getNotes();
if (changeNotes != null) {
RobotCommentNotes robotCommentNotes = changeNotes.load().getRobotCommentNotes();
if (robotCommentNotes != null) {
ObjectId idFromNotes = firstNonNull(robotCommentNotes.getRevision(), ObjectId.zeroId());
RevisionNoteMap rnm = robotCommentNotes.getRevisionNoteMap();
if (idFromNotes.equals(curr) && rnm != null) {
return rnm;
}
}
}
NoteMap noteMap;
if (!curr.equals(ObjectId.zeroId())) {
noteMap = NoteMap.read(rw.getObjectReader(), rw.parseCommit(curr));
} else {
noteMap = NoteMap.newEmptyMap();
}
// Even though reading from changes might not be enabled, we need to
// parse any existing revision notes so we can merge them.
return RevisionNoteMap.parseRobotComments(
noteUtil.getChangeNoteJson(), rw.getObjectReader(), noteMap);
}
@Override
protected CommitBuilder applyImpl(RevWalk rw, ObjectInserter ins, ObjectId curr)
throws IOException {
CommitBuilder cb = new CommitBuilder();
cb.setMessage("Update robot comments");
try {
return storeCommentsInNotes(rw, ins, curr, cb);
} catch (ConfigInvalidException e) {
throw new StorageException(e);
}
}
@Override
protected Project.NameKey getProjectName() {
return getNotes().getProjectName();
}
@Override
protected String getRefName() {
return robotCommentsRef(getId());
}
@Override
public boolean isEmpty() {
return put.isEmpty();
}
}