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// Copyright (C) 2009 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.
public final class Main {
private static final String FLOGGER_BACKEND_PROPERTY = "flogger.backend_factory";
private static final String FLOGGER_LOGGING_CONTEXT = "flogger.logging_context";
// We don't do any real work here because we need to import
// the archive lookup code and we cannot import a class in
// the default package. So this is just a tiny springboard
// to jump into the real main code.
//
public static void main(String[] argv) throws Exception {
if (onSupportedJavaVersion()) {
configureFloggerBackend();
com.google.gerrit.launcher.GerritLauncher.main(argv);
} else {
System.exit(1);
}
}
private static boolean onSupportedJavaVersion() {
final String version = System.getProperty("java.specification.version");
if (1.8 <= parse(version)) {
return true;
}
System.err.println("fatal: Gerrit Code Review requires Java 8 or later");
System.err.println(" (trying to run on Java " + version + ")");
return false;
}
private static void configureFloggerBackend() {
System.setProperty(
FLOGGER_LOGGING_CONTEXT, "com.google.gerrit.server.logging.LoggingContext#getInstance");
if (System.getProperty(FLOGGER_BACKEND_PROPERTY) != null) {
// Flogger backend is already configured
return;
}
// Configure log4j backend
System.setProperty(
FLOGGER_BACKEND_PROPERTY,
"com.google.common.flogger.backend.log4j.Log4jBackendFactory#getInstance");
}
private static double parse(String version) {
if (version == null || version.length() == 0) {
return 0.0;
}
try {
final int fd = version.indexOf('.');
final int sd = version.indexOf('.', fd + 1);
if (0 < sd) {
version = version.substring(0, sd);
}
return Double.parseDouble(version);
} catch (NumberFormatException e) {
return 0.0;
}
}
private Main() {}
}
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