1 files changed, 47 insertions, 0 deletions
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/index/OnlineUpgrader.java b/gerrit-server/src/main/java/com/google/gerrit/server/index/OnlineUpgrader.java
new file mode 100644
index 0000000000..bfcf55ff11
--- /dev/null
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/index/OnlineUpgrader.java
@@ -0,0 +1,47 @@
+// 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.server.index;
+
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.gerrit.lifecycle.LifecycleModule;
+import com.google.inject.Inject;
+
+/** Listener to handle upgrading index schema versions at startup. */
+public class OnlineUpgrader implements LifecycleListener {
+  public static class Module extends LifecycleModule {
+    @Override
+    protected void configure() {
+      listener().to(OnlineUpgrader.class);
+    }
+  }
+
+  private final VersionManager versionManager;
+
+  @Inject
+  OnlineUpgrader(VersionManager versionManager) {
+    this.versionManager = versionManager;
+  }
+
+  @Override
+  public void start() {
+    versionManager.startOnlineUpgrade();
+  }
+
+  @Override
+  public void stop() {
+    // Do nothing; reindexing threadpools are shut down in another listener, and indexes are closed
+    // on demand by IndexCollection.
+  }
+}