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// 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.lucene;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.gerrit.server.index.account.AccountField.FULL_NAME;
import static com.google.gerrit.server.index.account.AccountField.ID;
import static com.google.gerrit.server.index.account.AccountField.PREFERRED_EMAIL_EXACT;
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.Account;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.AccountState;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.index.AutoFlush;
import com.google.gerrit.server.index.IndexUtils;
import com.google.gerrit.server.index.account.AccountIndex;
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.NumericDocValuesField;
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 LuceneAccountIndex extends AbstractLuceneIndex<Account.Id, AccountState>
implements AccountIndex {
private static final String ACCOUNTS = "accounts";
private static final String FULL_NAME_SORT_FIELD = sortFieldName(FULL_NAME);
private static final String EMAIL_SORT_FIELD = sortFieldName(PREFERRED_EMAIL_EXACT);
private static final String ID_SORT_FIELD = sortFieldName(ID);
private static Term idTerm(AccountState as) {
return idTerm(as.getAccount().getId());
}
private static Term idTerm(Account.Id id) {
return QueryBuilder.intTerm(ID.getName(), id.get());
}
private final GerritIndexWriterConfig indexWriterConfig;
private final QueryBuilder<AccountState> queryBuilder;
private final Provider<AccountCache> accountCache;
private static Directory dir(Schema<AccountState> schema, Config cfg, SitePaths sitePaths)
throws IOException {
if (LuceneIndexModule.isInMemoryTest(cfg)) {
return new RAMDirectory();
}
Path indexDir = LuceneVersionManager.getDir(sitePaths, ACCOUNTS, schema);
return FSDirectory.open(indexDir);
}
@Inject
LuceneAccountIndex(
@GerritServerConfig Config cfg,
SitePaths sitePaths,
Provider<AccountCache> accountCache,
@Assisted Schema<AccountState> schema,
AutoFlush autoFlush)
throws IOException {
super(
schema,
sitePaths,
dir(schema, cfg, sitePaths),
ACCOUNTS,
null,
new GerritIndexWriterConfig(cfg, ACCOUNTS),
new SearcherFactory(),
autoFlush);
this.accountCache = accountCache;
indexWriterConfig = new GerritIndexWriterConfig(cfg, ACCOUNTS);
queryBuilder = new QueryBuilder<>(schema, indexWriterConfig.getAnalyzer());
}
@Override
void add(Document doc, Values<AccountState> values) {
// Add separate DocValues fields for those fields needed for sorting.
FieldDef<AccountState, ?> f = values.getField();
if (f == ID) {
int v = (Integer) getOnlyElement(values.getValues());
doc.add(new NumericDocValuesField(ID_SORT_FIELD, v));
} else if (f == FULL_NAME) {
String value = (String) getOnlyElement(values.getValues());
doc.add(new SortedDocValuesField(FULL_NAME_SORT_FIELD, new BytesRef(value)));
} else if (f == PREFERRED_EMAIL_EXACT) {
String value = (String) getOnlyElement(values.getValues());
doc.add(new SortedDocValuesField(EMAIL_SORT_FIELD, new BytesRef(value)));
}
super.add(doc, values);
}
@Override
public void replace(AccountState as) {
try {
replace(idTerm(as), toDocument(as)).get();
} catch (ExecutionException | InterruptedException e) {
throw new StorageException(e);
}
}
@Override
public void delete(Account.Id key) {
try {
delete(idTerm(key)).get();
} catch (ExecutionException | InterruptedException e) {
throw new StorageException(e);
}
}
@Override
public DataSource<AccountState> getSource(Predicate<AccountState> p, QueryOptions opts)
throws QueryParseException {
return new LuceneQuerySource(
opts.filterFields(IndexUtils::accountFields), queryBuilder.toQuery(p), getSort());
}
private Sort getSort() {
return new Sort(
new SortField(FULL_NAME_SORT_FIELD, SortField.Type.STRING, false),
new SortField(EMAIL_SORT_FIELD, SortField.Type.STRING, false),
new SortField(ID_SORT_FIELD, SortField.Type.LONG, false));
}
@Override
protected AccountState fromDocument(Document doc) {
Account.Id id = new Account.Id(doc.getField(ID.getName()).numericValue().intValue());
// Use the AccountCache rather than depending on any stored fields in the document (of which
// there shouldn't be any). The most expensive part to compute anyway is the effective group
// IDs, and we don't have a good way to reindex when those change.
// If the account doesn't exist return an empty AccountState to represent the missing account
// to account the fact that the account exists in the index.
return accountCache.get().getEvenIfMissing(id);
}
}
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