| // 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.notedb.rebuild; |
| |
| import com.google.gerrit.extensions.annotations.ExtensionPoint; |
| import com.google.gerrit.server.notedb.NotesMigrationState; |
| import java.io.IOException; |
| |
| /** Listener for state changes performed by {@link OnlineNoteDbMigrator}. */ |
| @ExtensionPoint |
| public interface NotesMigrationStateListener { |
| /** |
| * Invoked just before saving the new migration state. |
| * |
| * @param oldState state prior to this state change. |
| * @param newState state after this state change. |
| * @throws IOException if an error occurred, which will cause the migration to abort. Exceptions |
| * that should be considered non-fatal must be caught (and ideally logged) by the |
| * implementation rather than thrown. |
| */ |
| void preStateChange(NotesMigrationState oldState, NotesMigrationState newState) |
| throws IOException; |
| } |