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/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.application;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.ConsoleAppender;
import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.encoder.Encoder;
import javax.annotation.CheckForNull;
import org.sonar.application.config.AppSettings;
import org.sonar.application.process.StreamGobbler;
import org.sonar.process.ProcessId;
import org.sonar.process.Props;
import org.sonar.process.logging.LogLevelConfig;
import org.sonar.process.logging.LogbackHelper;
import org.sonar.process.logging.PatternLayoutEncoder;
import org.sonar.process.logging.RootLoggerConfig;
import static org.slf4j.Logger.ROOT_LOGGER_NAME;
import static org.sonar.application.process.StreamGobbler.LOGGER_GOBBLER;
import static org.sonar.application.process.StreamGobbler.LOGGER_STARTUP;
import static org.sonar.process.ProcessProperties.Property.CLUSTER_ENABLED;
import static org.sonar.process.ProcessProperties.Property.CLUSTER_NODE_NAME;
import static org.sonar.process.logging.RootLoggerConfig.newRootLoggerConfigBuilder;
/**
* Configure logback for the APP process.
*
* <p>
* SonarQube's logging use cases:
* <ol>
* <li>
* SQ started as a background process (with {@code sonar.sh start}):
* <ul>
* <li>
* logs produced by the JVM before logback is setup in the APP JVM or which can't be caught by logback
* (such as JVM crash) must be written to sonar.log
* </li>
* <li>
* logs produced by the sub process JVMs before logback is setup in the subprocess JVMs or which can't be caught
* by logback (such as JVM crash) must be written to sonar.log
* </li>
* <li>each JVM writes its own logs into its dedicated file</li>
* </ul>
* </li>
* <li>
* SQ started in console with wrapper (ie. with {@code sonar.sh console}):
* <ul>
* <li>
* logs produced by the APP JVM before logback is setup in the APP JVM or which can't be caught by logback
* (such as JVM crash) must be written to sonar.log
* </li>
* <li>
* logs produced by the sub process JVMs before logback is setup in the subprocess JVMs or which can't be caught
* by logback (such as JVM crash) must be written to sonar.log
* </li>
* <li>each JVM writes its own logs into its dedicated file</li>
* <li>APP JVM logs are written to the APP JVM {@code System.out}</li>
* </ul>
* </li>
* <li>
* SQ started from command line (ie. {@code java -jar sonar-application-X.Y.jar}):
* <ul>
* <li>
* logs produced by the APP JVM before logback is setup in the APP JVM or which can't be caught by logback
* (such as JVM crash) are the responsibility of the user to be dealt with
* </li>
* <li>
* logs produced by the sub process JVMs before logback is setup in the subprocess JVMs or which can't be caught
* by logback (such as JVM crash) must be written to APP's {@code System.out}
* </li>
* <li>each JVM writes its own logs into its dedicated file</li>
* <li>APP JVM logs are written to the APP JVM {@code System.out}</li>
* </ul>
* </li>
* <li>
* SQ started from an IT (ie. from command line with {@code option -Dsonar.log.console=true}):
* <ul>
* <li>
* logs produced by the APP JVM before logback is setup in the APP JVM or which can't be caught by logback
* (such as JVM crash) are the responsibility of the developer or maven to be dealt with
* </li>
* <li>
* logs produced by the sub process JVMs before logback is setup in the subprocess JVMs or which can't be caught
* by logback (such as JVM crash) must be written to APP's {@code System.out} and are the responsibility of the
* developer or maven to be dealt with
* </li>
* <li>each JVM writes its own logs into its dedicated file</li>
* <li>logs of all 4 JVMs are also written to the APP JVM {@code System.out}</li>
* </ul>
* </li>
* </ol>
* </p>
*
*/
public class AppLogging {
private static final String CONSOLE_LOGGER = "console";
private static final String CONSOLE_PLAIN_APPENDER = "CONSOLE";
private static final String APP_CONSOLE_APPENDER = "APP_CONSOLE";
private static final String GOBBLER_PLAIN_CONSOLE = "GOBBLER_CONSOLE";
private final RootLoggerConfig rootLoggerConfig;
private final LogbackHelper helper = new LogbackHelper();
private final AppSettings appSettings;
public AppLogging(AppSettings appSettings) {
this.appSettings = appSettings;
rootLoggerConfig = newRootLoggerConfigBuilder()
.setNodeNameField(getNodeNameWhenCluster(appSettings.getProps()))
.setProcessId(ProcessId.APP)
.build();
}
@CheckForNull
private static String getNodeNameWhenCluster(Props props) {
boolean clusterEnabled = props.valueAsBoolean(CLUSTER_ENABLED.getKey(),
Boolean.parseBoolean(CLUSTER_ENABLED.getDefaultValue()));
return clusterEnabled ? props.value(CLUSTER_NODE_NAME.getKey(), CLUSTER_NODE_NAME.getDefaultValue()) : null;
}
public LoggerContext configure() {
LoggerContext ctx = helper.getRootContext();
ctx.reset();
helper.enableJulChangePropagation(ctx);
configureConsole(ctx);
configureWithLogbackWritingToFile(ctx);
helper.apply(
LogLevelConfig.newBuilder(helper.getRootLoggerName())
.rootLevelFor(ProcessId.APP)
.immutableLevel("com.hazelcast",
Level.toLevel("WARN"))
.build(),
appSettings.getProps());
return ctx;
}
/**
* Creates a non additive logger dedicated to printing message as is (ie. assuming they are already formatted).
*
* It creates a dedicated appender to the System.out which applies no formatting the logs it receives.
*/
private void configureConsole(LoggerContext loggerContext) {
Encoder<ILoggingEvent> encoder = createGobblerEncoder(loggerContext);
ConsoleAppender<ILoggingEvent> consoleAppender = helper.newConsoleAppender(loggerContext, CONSOLE_PLAIN_APPENDER, encoder);
Logger consoleLogger = loggerContext.getLogger(CONSOLE_LOGGER);
consoleLogger.setAdditive(false);
consoleLogger.addAppender(consoleAppender);
}
/**
* The process has been started by orchestrator (ie. via {@code java -jar} and optionally passing the option {@code -Dsonar.log.console=true}).
* Therefor, APP's System.out (and System.err) are <strong>not</strong> copied to sonar.log by the wrapper and
* printing to sonar.log must be done at logback level.
*/
private void configureWithLogbackWritingToFile(LoggerContext ctx) {
Logger rootLogger = ctx.getLogger(ROOT_LOGGER_NAME);
Encoder<ILoggingEvent> encoder = helper.createEncoder(appSettings.getProps(), rootLoggerConfig, ctx);
FileAppender<ILoggingEvent> fileAppender = helper.newFileAppender(ctx, appSettings.getProps(), rootLoggerConfig, encoder);
rootLogger.addAppender(fileAppender);
rootLogger.addAppender(createAppConsoleAppender(ctx, encoder));
configureGobbler(ctx);
configureStartupLogger(ctx, fileAppender, encoder);
}
private void configureStartupLogger(LoggerContext ctx, FileAppender<ILoggingEvent> fileAppender, Encoder<ILoggingEvent> encoder) {
Logger startupLogger = ctx.getLogger(LOGGER_STARTUP);
startupLogger.setAdditive(false);
startupLogger.addAppender(fileAppender);
startupLogger.addAppender(helper.newConsoleAppender(ctx, GOBBLER_PLAIN_CONSOLE, encoder));
}
/**
* Configure the logger to which logs from sub processes are written to
* (called {@link StreamGobbler#LOGGER_GOBBLER}) by {@link StreamGobbler},
* to be:
* <ol>
* <li>non additive (ie. these logs will be output by the appender of {@link StreamGobbler#LOGGER_GOBBLER} and only this one)</li>
* <li>write logs as is (ie. without any extra formatting)</li>
* <li>write exclusively to App's System.out</li>
* </ol>
*/
private void configureGobbler(LoggerContext ctx) {
Logger gobblerLogger = ctx.getLogger(LOGGER_GOBBLER);
gobblerLogger.setAdditive(false);
Encoder<ILoggingEvent> encoder = createGobblerEncoder(ctx);
gobblerLogger.addAppender(helper.newConsoleAppender(ctx, GOBBLER_PLAIN_CONSOLE, encoder));
}
private ConsoleAppender<ILoggingEvent> createAppConsoleAppender(LoggerContext ctx, Encoder<ILoggingEvent> encoder) {
return helper.newConsoleAppender(ctx, APP_CONSOLE_APPENDER, encoder);
}
/**
* Simply displays the message received as input.
*/
private static Encoder<ILoggingEvent> createGobblerEncoder(LoggerContext context) {
PatternLayoutEncoder encoder = new PatternLayoutEncoder();
encoder.setContext(context);
encoder.setPattern("%msg%n");
encoder.start();
return encoder;
}
}
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