1 files changed, 45 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/index/OnlineUpgradeListener.java b/java/com/google/gerrit/server/index/OnlineUpgradeListener.java
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+++ b/java/com/google/gerrit/server/index/OnlineUpgradeListener.java
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+// 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;
+
+/** Listener for online schema upgrade events. */
+public interface OnlineUpgradeListener {
+  /**
+   * Called before starting upgrading a single index.
+   *
+   * @param name index definition name.
+   * @param oldVersion old schema version.
+   * @param newVersion new schema version.
+   */
+  void onStart(String name, int oldVersion, int newVersion);
+
+  /**
+   * Called after successfully upgrading a single index.
+   *
+   * @param name index definition name.
+   * @param oldVersion old schema version.
+   * @param newVersion new schema version.
+   */
+  void onSuccess(String name, int oldVersion, int newVersion);
+
+  /**
+   * Called after failing to upgrade a single index.
+   *
+   * @param name index definition name.
+   * @param oldVersion old schema version.
+   * @param newVersion new schema version.
+   */
+  void onFailure(String name, int oldVersion, int newVersion);
+}