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// 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.lucene;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.gerrit.server.index.group.GroupField.UUID;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.index.FieldDef;
import com.google.gerrit.index.QueryOptions;
import com.google.gerrit.index.Schema;
import com.google.gerrit.index.Schema.Values;
import com.google.gerrit.index.query.DataSource;
import com.google.gerrit.index.query.Predicate;
import com.google.gerrit.index.query.QueryParseException;
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.config.SitePaths;
import com.google.gerrit.server.group.InternalGroup;
import com.google.gerrit.server.index.IndexUtils;
import com.google.gerrit.server.index.group.GroupIndex;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.assistedinject.Assisted;
import java.io.IOException;
import java.nio.file.Path;
import java.util.concurrent.ExecutionException;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.SortedDocValuesField;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.SearcherFactory;
import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.BytesRef;
import org.eclipse.jgit.lib.Config;
public class LuceneGroupIndex extends AbstractLuceneIndex<AccountGroup.UUID, InternalGroup>
implements GroupIndex {
private static final String GROUPS = "groups";
private static final String UUID_SORT_FIELD = sortFieldName(UUID);
private static Term idTerm(InternalGroup group) {
return idTerm(group.getGroupUUID());
}
private static Term idTerm(AccountGroup.UUID uuid) {
return QueryBuilder.stringTerm(UUID.getName(), uuid.get());
}
private final GerritIndexWriterConfig indexWriterConfig;
private final QueryBuilder<InternalGroup> queryBuilder;
private final Provider<GroupCache> groupCache;
private static Directory dir(Schema<?> schema, Config cfg, SitePaths sitePaths)
throws IOException {
if (LuceneIndexModule.isInMemoryTest(cfg)) {
return new RAMDirectory();
}
Path indexDir = LuceneVersionManager.getDir(sitePaths, GROUPS, schema);
return FSDirectory.open(indexDir);
}
@Inject
LuceneGroupIndex(
@GerritServerConfig Config cfg,
SitePaths sitePaths,
Provider<GroupCache> groupCache,
@Assisted Schema<InternalGroup> schema)
throws IOException {
super(
schema,
sitePaths,
dir(schema, cfg, sitePaths),
GROUPS,
null,
new GerritIndexWriterConfig(cfg, GROUPS),
new SearcherFactory());
this.groupCache = groupCache;
indexWriterConfig = new GerritIndexWriterConfig(cfg, GROUPS);
queryBuilder = new QueryBuilder<>(schema, indexWriterConfig.getAnalyzer());
}
@Override
void add(Document doc, Values<InternalGroup> values) {
// Add separate DocValues field for the field that is needed for sorting.
FieldDef<InternalGroup, ?> f = values.getField();
if (f == UUID) {
String value = (String) getOnlyElement(values.getValues());
doc.add(new SortedDocValuesField(UUID_SORT_FIELD, new BytesRef(value)));
}
super.add(doc, values);
}
@Override
public void replace(InternalGroup group) {
try {
replace(idTerm(group), toDocument(group)).get();
} catch (ExecutionException | InterruptedException e) {
throw new StorageException(e);
}
}
@Override
public void delete(AccountGroup.UUID key) {
try {
delete(idTerm(key)).get();
} catch (ExecutionException | InterruptedException e) {
throw new StorageException(e);
}
}
@Override
public DataSource<InternalGroup> getSource(Predicate<InternalGroup> p, QueryOptions opts)
throws QueryParseException {
return new LuceneQuerySource(
opts.filterFields(IndexUtils::groupFields),
queryBuilder.toQuery(p),
new Sort(new SortField(UUID_SORT_FIELD, SortField.Type.STRING, false)));
}
@Override
protected InternalGroup fromDocument(Document doc) {
AccountGroup.UUID uuid = new AccountGroup.UUID(doc.getField(UUID.getName()).stringValue());
// Use the GroupCache rather than depending on any stored fields in the
// document (of which there shouldn't be any).
return groupCache.get().get(uuid).orElse(null);
}
}
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