1 files changed, 146 insertions, 0 deletions
diff --git a/java/com/google/gerrit/lucene/LuceneGroupIndex.java b/java/com/google/gerrit/lucene/LuceneGroupIndex.java
new file mode 100644
index 0000000000..95e2ab903e
--- /dev/null
+++ b/java/com/google/gerrit/lucene/LuceneGroupIndex.java
@@ -0,0 +1,146 @@
+// 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.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) throws IOException {
+    try {
+      replace(idTerm(group), toDocument(group)).get();
+    } catch (ExecutionException | InterruptedException e) {
+      throw new IOException(e);
+    }
+  }
+
+  @Override
+  public void delete(AccountGroup.UUID key) throws IOException {
+    try {
+      delete(idTerm(key)).get();
+    } catch (ExecutionException | InterruptedException e) {
+      throw new IOException(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);
+  }
+}