1 files changed, 164 insertions, 0 deletions
diff --git a/java/com/google/gerrit/lucene/LuceneAccountIndex.java b/java/com/google/gerrit/lucene/LuceneAccountIndex.java
new file mode 100644
index 0000000000..86a21115c5
--- /dev/null
+++ b/java/com/google/gerrit/lucene/LuceneAccountIndex.java
@@ -0,0 +1,164 @@
+// 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.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.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)
+      throws IOException {
+    super(
+        schema,
+        sitePaths,
+        dir(schema, cfg, sitePaths),
+        ACCOUNTS,
+        null,
+        new GerritIndexWriterConfig(cfg, ACCOUNTS),
+        new SearcherFactory());
+    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) throws IOException {
+    try {
+      replace(idTerm(as), toDocument(as)).get();
+    } catch (ExecutionException | InterruptedException e) {
+      throw new IOException(e);
+    }
+  }
+
+  @Override
+  public void delete(Account.Id key) throws IOException {
+    try {
+      delete(idTerm(key)).get();
+    } catch (ExecutionException | InterruptedException e) {
+      throw new IOException(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);
+  }
+}