com.google.gerrit.server.config.GerritServerIdProvider Maven / Gradle / Ivy
// 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.config;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.common.base.Strings;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.io.IOException;
import java.nio.file.Files;
import java.util.UUID;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.storage.file.FileBasedConfig;
import org.eclipse.jgit.util.FS;
public class GerritServerIdProvider implements Provider {
public static final String SECTION = "gerrit";
public static final String KEY = "serverId";
public static String generate() {
return UUID.randomUUID().toString();
}
private final String id;
@Inject
public GerritServerIdProvider(@GerritServerConfig Config cfg, SitePaths sitePaths)
throws IOException, ConfigInvalidException {
String origId = cfg.getString(SECTION, null, KEY);
if (!Strings.isNullOrEmpty(origId)) {
id = origId;
return;
}
// We're not generally supposed to do work in provider constructors, but this is a bit of a
// special case because we really need to have the ID available by the time the dbInjector
// is created. Fortunately, it's not much work, and it happens once.
id = generate();
Config newCfg = readGerritConfig(sitePaths);
newCfg.setString(SECTION, null, KEY, id);
Files.write(sitePaths.gerrit_config, newCfg.toText().getBytes(UTF_8));
}
@Override
public String get() {
return id;
}
private static Config readGerritConfig(SitePaths sitePaths)
throws IOException, ConfigInvalidException {
// Reread gerrit.config from disk before writing. We can't just use
// cfg.toText(), as the @GerritServerConfig only has gerrit.config as a
// fallback.
FileBasedConfig cfg = new FileBasedConfig(sitePaths.gerrit_config.toFile(), FS.DETECTED);
if (!cfg.getFile().exists()) {
return new Config();
}
cfg.load();
return cfg;
}
}