205 lines
6.8 KiB
Java
205 lines
6.8 KiB
Java
// Copyright (C) 2017 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.gerrit.lucene;
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import static com.google.gerrit.server.index.group.GroupField.UUID;
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import com.google.gerrit.index.QueryOptions;
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import com.google.gerrit.index.Schema;
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import com.google.gerrit.index.query.DataSource;
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import com.google.gerrit.index.query.Predicate;
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import com.google.gerrit.index.query.QueryParseException;
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import com.google.gerrit.reviewdb.client.AccountGroup;
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import com.google.gerrit.server.account.GroupCache;
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import com.google.gerrit.server.config.GerritServerConfig;
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import com.google.gerrit.server.config.SitePaths;
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import com.google.gerrit.server.group.InternalGroup;
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import com.google.gerrit.server.index.IndexUtils;
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import com.google.gerrit.server.index.group.GroupIndex;
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import com.google.gwtorm.server.OrmException;
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import com.google.gwtorm.server.ResultSet;
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import com.google.inject.Inject;
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import com.google.inject.Provider;
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import com.google.inject.assistedinject.Assisted;
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import java.io.IOException;
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import java.nio.file.Path;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Optional;
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import java.util.concurrent.ExecutionException;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.index.Term;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.ScoreDoc;
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import org.apache.lucene.search.SearcherFactory;
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import org.apache.lucene.search.Sort;
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import org.apache.lucene.search.SortField;
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import org.apache.lucene.search.TopFieldDocs;
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import org.apache.lucene.store.Directory;
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import org.apache.lucene.store.FSDirectory;
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import org.apache.lucene.store.RAMDirectory;
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import org.eclipse.jgit.lib.Config;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class LuceneGroupIndex extends AbstractLuceneIndex<AccountGroup.UUID, InternalGroup>
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implements GroupIndex {
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private static final Logger log = LoggerFactory.getLogger(LuceneGroupIndex.class);
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private static final String GROUPS = "groups";
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private static final String UUID_SORT_FIELD = sortFieldName(UUID);
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private static Term idTerm(InternalGroup group) {
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return idTerm(group.getGroupUUID());
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}
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private static Term idTerm(AccountGroup.UUID uuid) {
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return QueryBuilder.stringTerm(UUID.getName(), uuid.get());
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}
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private final GerritIndexWriterConfig indexWriterConfig;
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private final QueryBuilder<InternalGroup> queryBuilder;
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private final Provider<GroupCache> groupCache;
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private static Directory dir(Schema<?> schema, Config cfg, SitePaths sitePaths)
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throws IOException {
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if (LuceneIndexModule.isInMemoryTest(cfg)) {
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return new RAMDirectory();
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}
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Path indexDir = LuceneVersionManager.getDir(sitePaths, GROUPS, schema);
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return FSDirectory.open(indexDir);
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}
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@Inject
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LuceneGroupIndex(
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@GerritServerConfig Config cfg,
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SitePaths sitePaths,
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Provider<GroupCache> groupCache,
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@Assisted Schema<InternalGroup> schema)
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throws IOException {
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super(
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schema,
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sitePaths,
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dir(schema, cfg, sitePaths),
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GROUPS,
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null,
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new GerritIndexWriterConfig(cfg, GROUPS),
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new SearcherFactory());
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this.groupCache = groupCache;
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indexWriterConfig = new GerritIndexWriterConfig(cfg, GROUPS);
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queryBuilder = new QueryBuilder<>(schema, indexWriterConfig.getAnalyzer());
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}
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@Override
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public void replace(InternalGroup group) throws IOException {
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try {
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replace(idTerm(group), toDocument(group)).get();
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} catch (ExecutionException | InterruptedException e) {
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throw new IOException(e);
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}
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}
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@Override
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public void delete(AccountGroup.UUID key) throws IOException {
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try {
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delete(idTerm(key)).get();
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} catch (ExecutionException | InterruptedException e) {
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throw new IOException(e);
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}
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}
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@Override
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public DataSource<InternalGroup> getSource(Predicate<InternalGroup> p, QueryOptions opts)
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throws QueryParseException {
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return new QuerySource(
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opts,
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queryBuilder.toQuery(p),
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new Sort(new SortField(UUID_SORT_FIELD, SortField.Type.STRING, false)));
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}
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private class QuerySource implements DataSource<InternalGroup> {
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private final QueryOptions opts;
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private final Query query;
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private final Sort sort;
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private QuerySource(QueryOptions opts, Query query, Sort sort) {
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this.opts = opts;
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this.query = query;
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this.sort = sort;
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}
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@Override
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public int getCardinality() {
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return 10;
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}
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@Override
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public ResultSet<InternalGroup> read() throws OrmException {
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IndexSearcher searcher = null;
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try {
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searcher = acquire();
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int realLimit = opts.start() + opts.limit();
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TopFieldDocs docs = searcher.search(query, realLimit, sort);
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List<InternalGroup> result = new ArrayList<>(docs.scoreDocs.length);
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for (int i = opts.start(); i < docs.scoreDocs.length; i++) {
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ScoreDoc sd = docs.scoreDocs[i];
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Document doc = searcher.doc(sd.doc, IndexUtils.groupFields(opts));
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Optional<InternalGroup> internalGroup = toInternalGroup(doc);
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internalGroup.ifPresent(result::add);
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}
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final List<InternalGroup> r = Collections.unmodifiableList(result);
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return new ResultSet<InternalGroup>() {
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@Override
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public Iterator<InternalGroup> iterator() {
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return r.iterator();
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}
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@Override
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public List<InternalGroup> toList() {
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return r;
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}
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@Override
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public void close() {
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// Do nothing.
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}
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};
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} catch (IOException e) {
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throw new OrmException(e);
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} finally {
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if (searcher != null) {
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try {
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release(searcher);
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} catch (IOException e) {
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log.warn("cannot release Lucene searcher", e);
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}
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}
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}
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}
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}
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private Optional<InternalGroup> toInternalGroup(Document doc) {
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AccountGroup.UUID uuid = new AccountGroup.UUID(doc.getField(UUID.getName()).stringValue());
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// Use the GroupCache rather than depending on any stored fields in the
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// document (of which there shouldn't be any).
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return groupCache.get().get(uuid);
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}
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}
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