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// Copyright (C) 2014 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.index.change;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static com.google.gerrit.server.query.change.ChangeData.asChanges;
import com.google.common.flogger.FluentLogger;
import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.BranchNameKey;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.RefNames;
import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
import com.google.gerrit.server.change.MergeabilityComputationBehavior;
import com.google.gerrit.server.config.AllUsersName;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.git.QueueProvider.QueueType;
import com.google.gerrit.server.index.IndexExecutor;
import com.google.gerrit.server.index.account.AccountIndexer;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gerrit.server.util.ManualRequestContext;
import com.google.gerrit.server.util.OneOffRequestContext;
import com.google.gerrit.server.util.RequestContext;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import org.eclipse.jgit.lib.Config;
/**
* Listener for ref update events that reindexes entities in case the updated Git reference was used
* to compute contents of an index document.
*
* <p>Reindexes any open changes that has a destination branch that was updated to ensure that
* 'mergeable' is still current.
*
* <p>Will reindex accounts when the account's NoteDb ref changes.
*/
public class ReindexAfterRefUpdate implements GitReferenceUpdatedListener {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final OneOffRequestContext requestContext;
private final Provider<InternalChangeQuery> queryProvider;
private final ChangeIndexer.Factory indexerFactory;
private final ChangeIndexCollection indexes;
private final AllUsersName allUsersName;
private final Provider<AccountIndexer> indexer;
private final ListeningExecutorService executor;
private final boolean enabled;
@Inject
ReindexAfterRefUpdate(
@GerritServerConfig Config cfg,
OneOffRequestContext requestContext,
Provider<InternalChangeQuery> queryProvider,
ChangeIndexer.Factory indexerFactory,
ChangeIndexCollection indexes,
AllUsersName allUsersName,
Provider<AccountIndexer> indexer,
@IndexExecutor(QueueType.BATCH) ListeningExecutorService executor) {
this.requestContext = requestContext;
this.queryProvider = queryProvider;
this.indexerFactory = indexerFactory;
this.indexes = indexes;
this.allUsersName = allUsersName;
this.indexer = indexer;
this.executor = executor;
this.enabled = MergeabilityComputationBehavior.fromConfig(cfg).includeInIndex();
}
@Override
public void onGitReferenceUpdated(Event event) {
if (allUsersName.get().equals(event.getProjectName())
&& !RefNames.REFS_CONFIG.equals(event.getRefName())) {
Account.Id accountId = Account.Id.fromRef(event.getRefName());
if (accountId != null && !event.getRefName().startsWith(RefNames.REFS_STARRED_CHANGES)) {
indexer.get().index(accountId);
}
// The update is in All-Users and not on refs/meta/config. So it's not a change. Return early.
return;
}
if (!enabled
|| event.getRefName().startsWith(RefNames.REFS_CHANGES)
|| event.getRefName().startsWith(RefNames.REFS_DRAFT_COMMENTS)
|| event.getRefName().startsWith(RefNames.REFS_USERS)) {
return;
}
Futures.addCallback(
executor.submit(new GetChanges(event)),
new FutureCallback<List<Change>>() {
@Override
public void onSuccess(List<Change> changes) {
for (Change c : changes) {
@SuppressWarnings("unused")
Future<?> possiblyIgnoredError =
indexerFactory.create(executor, indexes).indexAsync(c.getProject(), c.getId());
}
}
@Override
public void onFailure(Throwable ignored) {
// Logged by {@link GetChanges#call()}.
}
},
directExecutor());
}
private abstract class Task<V> implements Callable<V> {
protected Event event;
protected Task(Event event) {
this.event = event;
}
@Override
public final V call() throws Exception {
try (ManualRequestContext ctx = requestContext.open()) {
return impl(ctx);
} catch (Exception e) {
logger.atSevere().withCause(e).log("Failed to reindex changes after %s", event);
throw e;
}
}
protected abstract V impl(RequestContext ctx) throws Exception;
protected abstract void remove();
}
private class GetChanges extends Task<List<Change>> {
private GetChanges(Event event) {
super(event);
}
@Override
protected List<Change> impl(RequestContext ctx) {
String ref = event.getRefName();
Project.NameKey project = Project.nameKey(event.getProjectName());
if (ref.equals(RefNames.REFS_CONFIG)) {
return asChanges(queryProvider.get().byProjectOpen(project));
}
return asChanges(queryProvider.get().byBranchNew(BranchNameKey.create(project, ref)));
}
@Override
public String toString() {
return "Get changes to reindex caused by "
+ event.getRefName()
+ " update of project "
+ event.getProjectName();
}
@Override
protected void remove() {}
}
}
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