com.google.gerrit.server.notedb.NotesMigrationState Maven / Gradle / Ivy
// 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;
import com.google.gerrit.server.notedb.NoteDbChangeState.PrimaryStorage;
import com.google.gerrit.server.notedb.NotesMigration.Snapshot;
import java.util.Optional;
import java.util.stream.Stream;
import org.eclipse.jgit.lib.Config;
/**
* Possible high-level states of the NoteDb migration for changes.
*
* This class describes the series of states required to migrate a site from ReviewDb-only to
* NoteDb-only. This process has several steps, and covers only a small subset of the theoretically
* possible combinations of {@link NotesMigration} return values.
*
*
These states are ordered: a one-way migration from ReviewDb to NoteDb will pass through states
* in the order in which they are defined.
*/
public enum NotesMigrationState {
REVIEW_DB(false, false, false, PrimaryStorage.REVIEW_DB, false),
WRITE(false, true, false, PrimaryStorage.REVIEW_DB, false),
READ_WRITE_NO_SEQUENCE(true, true, false, PrimaryStorage.REVIEW_DB, false),
READ_WRITE_WITH_SEQUENCE_REVIEW_DB_PRIMARY(true, true, true, PrimaryStorage.REVIEW_DB, false),
READ_WRITE_WITH_SEQUENCE_NOTE_DB_PRIMARY(true, true, true, PrimaryStorage.NOTE_DB, false),
NOTE_DB(true, true, true, PrimaryStorage.NOTE_DB, true);
public static final NotesMigrationState FINAL = NOTE_DB;
public static Optional forConfig(Config cfg) {
return forSnapshot(Snapshot.create(cfg));
}
public static Optional forNotesMigration(NotesMigration migration) {
return forSnapshot(migration.snapshot());
}
private static Optional forSnapshot(Snapshot s) {
return Stream.of(values()).filter(v -> v.snapshot.equals(s)).findFirst();
}
private final Snapshot snapshot;
NotesMigrationState(
// Arguments match abstract methods in NotesMigration.
boolean readChanges,
boolean rawWriteChangesSetting,
boolean readChangeSequence,
PrimaryStorage changePrimaryStorage,
boolean disableChangeReviewDb) {
this.snapshot =
Snapshot.builder()
.setReadChanges(readChanges)
.setWriteChanges(rawWriteChangesSetting)
.setReadChangeSequence(readChangeSequence)
.setChangePrimaryStorage(changePrimaryStorage)
.setDisableChangeReviewDb(disableChangeReviewDb)
.build();
}
public void setConfigValues(Config cfg) {
snapshot.setConfigValues(cfg);
}
public String toText() {
Config cfg = new Config();
setConfigValues(cfg);
return cfg.toText();
}
Snapshot snapshot() {
return snapshot;
}
}