| // Copyright (C) 2017 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.group; |
| |
| import static com.google.gerrit.server.git.QueueProvider.QueueType.BATCH; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.util.concurrent.Futures; |
| import com.google.common.util.concurrent.ListeningExecutorService; |
| import com.google.gerrit.common.Nullable; |
| import com.google.gerrit.extensions.events.GroupIndexedListener; |
| import com.google.gerrit.extensions.registration.DynamicSet; |
| import com.google.gerrit.index.Index; |
| import com.google.gerrit.reviewdb.client.AccountGroup; |
| import com.google.gerrit.server.account.GroupCache; |
| import com.google.gerrit.server.config.GerritServerConfig; |
| import com.google.gerrit.server.group.InternalGroup; |
| import com.google.gerrit.server.index.IndexExecutor; |
| import com.google.gerrit.server.index.IndexUtils; |
| import com.google.inject.assistedinject.Assisted; |
| import com.google.inject.assistedinject.AssistedInject; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Optional; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.Future; |
| import org.eclipse.jgit.lib.Config; |
| |
| public class GroupIndexerImpl implements GroupIndexer { |
| public interface Factory { |
| GroupIndexerImpl create(GroupIndexCollection indexes); |
| |
| GroupIndexerImpl create(@Nullable GroupIndex index); |
| } |
| |
| private final GroupCache groupCache; |
| private final DynamicSet<GroupIndexedListener> indexedListener; |
| private final StalenessChecker stalenessChecker; |
| private final ListeningExecutorService batchExecutor; |
| private final boolean autoReindexIfStale; |
| @Nullable private final GroupIndexCollection indexes; |
| @Nullable private final GroupIndex index; |
| |
| @AssistedInject |
| GroupIndexerImpl( |
| GroupCache groupCache, |
| DynamicSet<GroupIndexedListener> indexedListener, |
| StalenessChecker stalenessChecker, |
| @IndexExecutor(BATCH) ListeningExecutorService batchExecutor, |
| @GerritServerConfig Config config, |
| @Assisted GroupIndexCollection indexes) { |
| this.groupCache = groupCache; |
| this.indexedListener = indexedListener; |
| this.stalenessChecker = stalenessChecker; |
| this.batchExecutor = batchExecutor; |
| this.autoReindexIfStale = autoReindexIfStale(config); |
| this.indexes = indexes; |
| this.index = null; |
| } |
| |
| @AssistedInject |
| GroupIndexerImpl( |
| GroupCache groupCache, |
| DynamicSet<GroupIndexedListener> indexedListener, |
| StalenessChecker stalenessChecker, |
| @IndexExecutor(BATCH) ListeningExecutorService batchExecutor, |
| @GerritServerConfig Config config, |
| @Assisted @Nullable GroupIndex index) { |
| this.groupCache = groupCache; |
| this.indexedListener = indexedListener; |
| this.stalenessChecker = stalenessChecker; |
| this.batchExecutor = batchExecutor; |
| this.autoReindexIfStale = autoReindexIfStale(config); |
| this.indexes = null; |
| this.index = index; |
| } |
| |
| @Override |
| public void index(AccountGroup.UUID uuid) throws IOException { |
| for (Index<AccountGroup.UUID, InternalGroup> i : getWriteIndexes()) { |
| Optional<InternalGroup> internalGroup = groupCache.get(uuid); |
| if (internalGroup.isPresent()) { |
| i.replace(internalGroup.get()); |
| } else { |
| i.delete(uuid); |
| } |
| } |
| fireGroupIndexedEvent(uuid.get()); |
| autoReindexIfStale(uuid); |
| } |
| |
| private static boolean autoReindexIfStale(Config cfg) { |
| return cfg.getBoolean("index", null, "autoReindexIfStale", true); |
| } |
| |
| private void autoReindexIfStale(AccountGroup.UUID uuid) { |
| if (autoReindexIfStale) { |
| // Don't retry indefinitely; if this fails the group will be stale. |
| @SuppressWarnings("unused") |
| Future<?> possiblyIgnoredError = reindexIfStale(uuid); |
| } |
| } |
| |
| /** |
| * Asynchronously check if a group is stale, and reindex if it is. |
| * |
| * <p>Always run on the batch executor, even if this indexer instance is configured to use a |
| * different executor. |
| * |
| * @param uuid the unique identifier of the group. |
| * @return future for reindexing the group; returns true if the group was stale. |
| */ |
| @SuppressWarnings("deprecation") |
| public com.google.common.util.concurrent.CheckedFuture<Boolean, IOException> reindexIfStale( |
| AccountGroup.UUID uuid) { |
| Callable<Boolean> task = |
| () -> { |
| if (stalenessChecker.isStale(uuid)) { |
| index(uuid); |
| return true; |
| } |
| return false; |
| }; |
| |
| return Futures.makeChecked( |
| Futures.nonCancellationPropagating(batchExecutor.submit(task)), IndexUtils.MAPPER); |
| } |
| |
| private void fireGroupIndexedEvent(String uuid) { |
| for (GroupIndexedListener listener : indexedListener) { |
| listener.onGroupIndexed(uuid); |
| } |
| } |
| |
| private Collection<GroupIndex> getWriteIndexes() { |
| if (indexes != null) { |
| return indexes.getWriteIndexes(); |
| } |
| |
| return index != null ? Collections.singleton(index) : ImmutableSet.of(); |
| } |
| } |