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// 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.server;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.config.AllProjectsName;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.notedb.NotesMigration;
import com.google.gerrit.server.notedb.RepoSequence;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jgit.lib.Config;
@SuppressWarnings("deprecation")
@Singleton
public class Sequences {
public static final String CHANGES = "changes";
private final Provider<ReviewDb> db;
private final NotesMigration migration;
private final RepoSequence changeSeq;
@Inject
Sequences(
@GerritServerConfig Config cfg,
final Provider<ReviewDb> db,
NotesMigration migration,
GitRepositoryManager repoManager,
AllProjectsName allProjects) {
this.db = db;
this.migration = migration;
final int gap = cfg.getInt("noteDb", "changes", "initialSequenceGap", 0);
changeSeq =
new RepoSequence(
repoManager,
allProjects,
CHANGES,
new RepoSequence.Seed() {
@Override
public int get() throws OrmException {
return db.get().nextChangeId() + gap;
}
},
cfg.getInt("noteDb", "changes", "sequenceBatchSize", 20));
}
public int nextChangeId() throws OrmException {
if (!migration.readChangeSequence()) {
return db.get().nextChangeId();
}
return changeSeq.next();
}
public ImmutableList<Integer> nextChangeIds(int count) throws OrmException {
if (migration.readChangeSequence()) {
return changeSeq.next(count);
}
if (count == 0) {
return ImmutableList.of();
}
checkArgument(count > 0, "count is negative: %s", count);
List<Integer> ids = new ArrayList<>(count);
ReviewDb db = this.db.get();
for (int i = 0; i < count; i++) {
ids.add(db.nextChangeId());
}
return ImmutableList.copyOf(ids);
}
@VisibleForTesting
public RepoSequence getChangeIdRepoSequence() {
return changeSeq;
}
}