com.google.gerrit.server.group.PeriodicGroupIndexer Maven / Gradle / Ivy
// Copyright (C) 2018 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.group;
import static com.google.common.collect.ImmutableSet.toImmutableSet;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.GroupReference;
import com.google.gerrit.server.config.AllUsersName;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.group.db.GroupNameNotes;
import com.google.gerrit.server.index.group.GroupIndexer;
import com.google.inject.Inject;
import com.google.inject.Provider;
import org.eclipse.jgit.lib.Repository;
/**
* Runnable to schedule periodic group reindexing.
*
* Periodic group indexing is intended to run only on slaves. Replication to slaves happens on
* Git level so that Gerrit is not aware of incoming replication events. But slaves need an updated
* group index to resolve memberships of users for ACL validation. To keep the group index in slaves
* up-to-date this class periodically scans the group refs in the All-Users repository to reindex
* groups if they are stale. The ref states of the group refs are cached so that on each run deleted
* groups can be detected and reindexed. This means callers of slaves may observe outdated group
* information until the next indexing happens. The interval on which group indexing is done is
* configurable by setting {@code index.scheduledIndexer.interval} in {@code gerrit.config}. By
* default group indexing is done every 5 minutes.
*
*
This class is not able to detect group deletions that were replicated while the slave was
* offline. This means if group refs are deleted while the slave is offline these groups are not
* removed from the group index when the slave is started. However since group deletion is not
* supported this should never happen and one can always do an offline reindex before starting the
* slave.
*/
public class PeriodicGroupIndexer implements Runnable {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final AllUsersName allUsersName;
private final GitRepositoryManager repoManager;
private final Provider groupIndexerProvider;
private ImmutableSet groupUuids;
@Inject
PeriodicGroupIndexer(
AllUsersName allUsersName,
GitRepositoryManager repoManager,
Provider groupIndexerProvider) {
this.allUsersName = allUsersName;
this.repoManager = repoManager;
this.groupIndexerProvider = groupIndexerProvider;
}
@Override
public synchronized void run() {
try (Repository allUsers = repoManager.openRepository(allUsersName)) {
ImmutableSet newGroupUuids =
GroupNameNotes.loadAllGroups(allUsers).stream()
.map(GroupReference::getUUID)
.collect(toImmutableSet());
GroupIndexer groupIndexer = groupIndexerProvider.get();
int reindexCounter = 0;
for (AccountGroup.UUID groupUuid : newGroupUuids) {
if (groupIndexer.reindexIfStale(groupUuid)) {
reindexCounter++;
}
}
if (groupUuids != null) {
// Check if any group was deleted since the last run and if yes remove these groups from the
// index.
for (AccountGroup.UUID groupUuid : Sets.difference(groupUuids, newGroupUuids)) {
groupIndexer.index(groupUuid);
reindexCounter++;
}
}
groupUuids = newGroupUuids;
logger.atInfo().log("Run group indexer, %s groups reindexed", reindexCounter);
} catch (Exception t) {
logger.atSevere().withCause(t).log("Failed to reindex groups");
}
}
}