org.slf4j.ILoggerFactory Java Examples

public static ServiceLocator initServiceLocator() {
  DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
  locator.setErrorHandler(
      new DefaultServiceLocator.ErrorHandler() {
        @Override
        public void serviceCreationFailed(Class<?> type, Class<?> impl, Throwable exception) {
          throw new RuntimeException(
              String.format(
                  "Failed to initialize service %s, implemented by %s: %s",
                  type.getName(), impl.getName(), exception.getMessage()),
              exception);
        }
      });
  locator.addService(RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class);
  locator.addService(TransporterFactory.class, HttpTransporterFactory.class);
  locator.addService(TransporterFactory.class, FileTransporterFactory.class);
  // Use a no-op logger. Leaving this out would introduce a runtime dependency on log4j
  locator.addService(ILoggerFactory.class, NOPLoggerFactory.class);
  // Also requires log4j
  //    locator.addService(ILoggerFactory.class, Log4jLoggerFactory.class);
  return locator;
}
 

/***
 * 根据 spaceId 在日志空间里移除指定 spaceName 的 ILoggerFactory
 *
 * @param spaceId 指定的日志空间名称
 * @return 被移除的 ILoggerFactory;不存在指定的 spaceName,则返回 null
 */
public static ILoggerFactory removeILoggerFactoryBySpaceId(SpaceId spaceId) {
    if (spaceId == null) {
        return null;
    }
    SpaceInfo spaceInfo = SPACES_MAP.get(spaceId);
    if (isSpaceILoggerFactoryExisted(spaceId)) {
        AbstractLoggerSpaceFactory iLoggeriFactory = spaceInfo.getAbstractLoggerSpaceFactory();
        spaceInfo.setAbstractLoggerSpaceFactory(null);
        Logger rootLogger = iLoggeriFactory.getLogger(Logger.ROOT_LOGGER_NAME);
        rootLogger.warn("Log Space Name[" + spaceId.toString()
                        + "] is Removed from Current Log Space Manager!");
        return iLoggeriFactory;
    }
    return null;
}
 

@PreAuthorize("hasAnyRole('ROLE_SU')")
@PostMapping("/loggers/reset")
@ResponseStatus(HttpStatus.OK)
public void resetLoggers() {
  ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
  if (!(iLoggerFactory instanceof LoggerContext)) {
    throw new RuntimeException("Logger factory is not a Logback logger context");
  }
  LoggerContext loggerContext = (LoggerContext) iLoggerFactory;
  ContextInitializer ci = new ContextInitializer(loggerContext);
  URL url = ci.findURLOfDefaultConfigurationFile(true);
  loggerContext.reset();
  try {
    ci.configureByResource(url);
  } catch (JoranException e) {
    throw new RuntimeException("Error reloading log configuration", e);
  }
}
 

@GetMapping
public String init(Model model) {
  ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
  if (!(iLoggerFactory instanceof LoggerContext)) {
    throw new RuntimeException("Logger factory is not a Logback logger context");
  }
  LoggerContext loggerContext = (LoggerContext) iLoggerFactory;

  List<Logger> loggers = new ArrayList<>();
  for (ch.qos.logback.classic.Logger logger : loggerContext.getLoggerList()) {
    if (logger.getLevel() != null || logger.iteratorForAppenders().hasNext()) {
      loggers.add(logger);
    }
  }

  model.addAttribute("loggers", loggers);
  model.addAttribute("levels", LOG_LEVELS);
  model.addAttribute("hasWritePermission", SecurityUtils.currentUserIsSu());
  return "view-logmanager";
}
 

/**
 * Set the log level for the requested logger name.
 *
 * @param loggerName name of the logger
 * @param logLevel the log level to set to.
 * @return the current log level of the given logger. If there is no log level configured for the given logger or
 *         if the logging implementation is not logback, {@code null} will be returned
 */
@Nullable
private String setLogLevel(String loggerName, @Nullable String logLevel) {
  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
  if (!(loggerFactory instanceof LoggerContext)) {
    LOG.error("LoggerFactory is not a logback LoggerContext, cannot make the log level change");
    return null;
  }
  LoggerContext loggerContext = (LoggerContext) loggerFactory;

  ch.qos.logback.classic.Logger logger = loggerContext.getLogger(loggerName);
  LogEntry.Level oldLogLevel = logger.getLevel() == null ? null :
    LogEntry.Level.valueOf(logger.getLevel().toString());
  LOG.debug("Log level of {} changed from {} to {}", loggerName, oldLogLevel, logLevel);
  logger.setLevel(logLevel == null ? null : Level.toLevel(logLevel, Level.ERROR));

  return oldLogLevel == null ? null : oldLogLevel.name();
}
 

private void flushLogs() {
  final long millisToWait = 100;

  LOG.info(
    "Attempting to flush logs and wait {} ...",
    JavaUtils.durationFromMillis(millisToWait)
  );

  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
  if (loggerFactory instanceof LoggerContext) {
    LoggerContext context = (LoggerContext) loggerFactory;
    context.stop();
  }

  try {
    Thread.sleep(millisToWait);
  } catch (Exception e) {
    LOG.info("While sleeping for log flush", e);
  }
}
 

@Before
public void init() throws Exception {
       TimeZone.setDefault(TimeZone.getTimeZone("UTC"));

	request = mock(HttpServletRequest.class);
	response = mock(HttpServletResponse.class);
	registry = new EventLoggingRegistry();
	EventLogDefinition eld = new EventLogDefinition();
	eld.setRegistry(registry);
	eld.setLogName("ACCESS-LOG");
	eld.register();

       loggerFactory = mock(ILoggerFactory.class);
       oldLoggerFactory = HttpRequestLogger.setLoggerFactory(loggerFactory);
       eventLog = mock(Logger.class);
}
 

private void configureLogging() {

		System.setProperty(SPRING_BOOT_DATA_GEMFIRE_LOG_LEVEL_PROPERTY, getTestLogLevel().toString());

		ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();

		assertThat(loggerFactory).isInstanceOf(LoggerContext.class);

		LoggerContext loggerContext = (LoggerContext) loggerFactory;

		try {
			new ContextInitializer(loggerContext).autoConfig();
		}
		catch (Exception cause) {
			throw newIllegalStateException("Failed to configure and initialize SLF4J/Logback logging context", cause);
		}
	}
 

private void configureLogger() throws MalformedURLException, JoranException {
  // Check if SLF4J is bound to logback in the current environment
  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
  if (!(loggerFactory instanceof LoggerContext)) {
    return;
  }

  LoggerContext context = (LoggerContext) loggerFactory;

  ContextInitializer contextInitializer = new ContextInitializer(context);
  URL url = contextInitializer.findURLOfDefaultConfigurationFile(false);
  if (url == null) {
    // The logger context was not initialized using configuration file, initialize it with the logback template.
    File twillLogback = new File(Constants.Files.RUNTIME_CONFIG_JAR, Constants.Files.LOGBACK_TEMPLATE);
    if (twillLogback.exists()) {
      contextInitializer.configureByResource(twillLogback.toURI().toURL());
    }
  }

  KafkaAppender kafkaAppender = getKafkaAppender(context);
  kafkaAppender.start();

  // Attach the KafkaAppender to the root logger
  context.getLogger(ch.qos.logback.classic.Logger.ROOT_LOGGER_NAME).addAppender(kafkaAppender);
}
 

@Override
public void setWorkDir(File path) {
    if (path == null) {
        throw new IllegalArgumentException("Work directory is null");
    }
    if (!path.exists()) {
        path.mkdirs();
    }
    this.workDir = path;
    System.setProperty("log.home", path.getAbsolutePath());
    ILoggerFactory fac = LoggerFactory.getILoggerFactory();
    if (fac != null && fac instanceof LoggerContext) {
        LoggerContext lc = (LoggerContext) fac;
        lc.getStatusManager().clear();
        lc.reset();
        lc.putProperty("log.home", path.getAbsolutePath());
        ContextInitializer ci = new ContextInitializer(lc);
        try {
            ci.autoConfig();
        } catch (JoranException e) {
            e.printStackTrace();
        }
    }
}
 

/**
 * Returns the current logger-context.
 */
@VisibleForTesting
static LoggerContext loggerContext() {
  ILoggerFactory factory = LoggerFactory.getILoggerFactory();
  if (factory instanceof LoggerContext) {
    return (LoggerContext) factory;
  }
  // Pax-Logging registers a custom implementation of ILoggerFactory which hides logback; as a workaround
  // we set org.ops4j.pax.logging.StaticLogbackContext=true in system.properties and access it statically
  return (LoggerContext) StaticLoggerBinder.getSingleton().getLoggerFactory();
}
 

@Override
public void onActivated(Options opts) throws BadCommandLineException {
	final ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
	if (iLoggerFactory instanceof NOPLoggerFactory) {
		System.err
				.println("You seem to be using the NOP provider of the SLF4j logging facade. "
						+ "With this configuration, log messages will be completely suppressed. "
						+ "Please consider adding a SLF4j provider (for instance slf4j-simple) to enable logging.");
	}
}
 

public static void immediateFlushBufferedLogs() {
    ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();

    if (loggerFactory.getClass().getName().equals(LogbackLoggerContextClassName)) {
        // Use reflection to force the flush on the logger
        try {
            Class<?> logbackLoggerContextClass = Class.forName(LogbackLoggerContextClassName);
            Method stop = logbackLoggerContextClass.getMethod("stop");
            stop.invoke(loggerFactory);
        } catch (Throwable t) {
            LOG.info("Failed to flush logs", t);
        }
    }
}
 

@Before
public void initLogback() throws JoranException {
    InternalLoggerFactory.setCurrentLoggerType(InternalLoggerFactory.LOGGER_SLF4J);
    System.setProperty("loggingDir", loggingDir);
    ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
    JoranConfigurator joranConfigurator = new JoranConfigurator();
    joranConfigurator.setContext((Context) iLoggerFactory);
    URL logbackConfigFile = Slf4jLoggerFactoryTest.class.getClassLoader().getResource("logback_test.xml");
    if (logbackConfigFile == null) {
        throw new RuntimeException("can't find logback_test.xml");
    } else {
        joranConfigurator.doConfigure(logbackConfigFile);
    }
}
 

@Override
public void onStartup(ServletContext servletContext) throws ServletException
{
	super.onStartup(servletContext);
	ILoggerFactory loggerFactory = StaticLoggerBinder.getSingleton().getLoggerFactory();
	if (loggerFactory instanceof LoggerContext)
	{
		LoggerContext loggerContext = (LoggerContext) loggerFactory;
		loggerContext.setPackagingDataEnabled(false);
		log.debug("Disabling logback packaging data");
	}
}
 

public static void forceFlush() {
  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();

  if (loggerFactory instanceof LoggerContext) {
    Appender<ILoggingEvent> appender = ((LoggerContext) loggerFactory).getLogger(Logger.ROOT_LOGGER_NAME)
                                                                      .getAppender("KAFKA");
    if (appender != null && appender instanceof KafkaAppender) {
      ((KafkaAppender) appender).forceFlush();
    }
  }
}
 

private LoggerContext getLoggerContext() {
	ILoggerFactory factory = StaticLoggerBinder.getSingleton().getLoggerFactory();
	Assert.isInstanceOf(LoggerContext.class, factory,
			String.format("LoggerFactory is not a Logback LoggerContext but Logback is on "
					+ "the classpath. Either remove Logback or the competing "
					+ "implementation (%s loaded from %s). If you are using "
					+ "WebLogic you will need to add 'org.slf4j' to " + "prefer-application-packages in WEB-INF/weblogic.xml",
					factory.getClass(), getLocation(factory)));
	return (LoggerContext) factory;
}
 

@Before
public void initLogback() throws JoranException {
    InternalLoggerFactory.setCurrentLoggerType(InternalLoggerFactory.LOGGER_SLF4J);
    System.setProperty("loggingDir", loggingDir);
    ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
    JoranConfigurator joranConfigurator = new JoranConfigurator();
    joranConfigurator.setContext((Context) iLoggerFactory);
    URL logbackConfigFile = Slf4jLoggerFactoryTest.class.getClassLoader().getResource("logback_test.xml");
    if (logbackConfigFile == null) {
        throw new RuntimeException("can't find logback_test.xml");
    } else {
        joranConfigurator.doConfigure(logbackConfigFile);
    }
}
 

/**
 * issue#234
 */
@Test
public void testLogClassCastBug() {
    Throwable throwable = null;
    try {
        ILoggerFactory iLoggerFactory = (ILoggerFactory) this.getClass().getClassLoader()
            .loadClass("org.apache.logging.slf4j.Log4jLoggerFactory").newInstance();
    } catch (Throwable t) {
        throwable = t;
    }
    Assert.assertNull(throwable);
}
 

private ConcurrentMap<String, Logger> clearIlogger() throws Exception {
    ILoggerFactory ilogger = LoggerFactory.getILoggerFactory();
    Field field = SimpleLoggerFactory.class.getDeclaredField("loggerMap");
    field.setAccessible(true);
    ConcurrentMap<String, Logger> map = (ConcurrentMap<String, Logger>) field
            .get(ilogger);
    map.clear();
    return map;
}
 

public static void applyConfiguration(final DolphinLoggerConfiguration configuration) {
    final ILoggerFactory factory = LoggerFactory.getILoggerFactory();
    Objects.requireNonNull(factory);
    if(factory instanceof DolphinLoggerFactory) {
        ((DolphinLoggerFactory) factory).configure(configuration);
    } else {
        throw new IllegalStateException(LoggerFactory.class + " is not of type " + DolphinLoggerFactory.class);
    }
}
 

public DefaultJsonixContext(ILoggerFactory loggerFactory) {
	this.loggerFactory = new LevelledLoggerFactoryWrapper(loggerFactory) {
		@Override
		protected int getLevel() {
			return DefaultJsonixContext.this.getLogLevel();
		}
	};
}
 

@Before
public void initLogback() throws JoranException {
    InternalLoggerFactory.setCurrentLoggerType(InternalLoggerFactory.LOGGER_SLF4J);
    System.setProperty("loggingDir", loggingDir);
    ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
    JoranConfigurator joranConfigurator = new JoranConfigurator();
    joranConfigurator.setContext((Context) iLoggerFactory);
    URL logbackConfigFile = Slf4jLoggerFactoryTest.class.getClassLoader().getResource("logback_test.xml");
    if (logbackConfigFile == null) {
        throw new RuntimeException("can't find logback_test.xml");
    } else {
        joranConfigurator.doConfigure(logbackConfigFile);
    }
}
 

public List<LoggerConfig> getLoggers() {
	List<LoggerConfig> loggers = new ArrayList<LoggerConfig>();
	ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
	if (loggerFactory instanceof LoggerContext) {
		LoggerContext context = (LoggerContext) loggerFactory;
		for (ch.qos.logback.classic.Logger l : context.getLoggerList()) {
			loggers.add(new LoggerConfig(l.getName(), l.getEffectiveLevel().toString()));
		}
	}
	return loggers;
}
 

public void update(LoggerConfig logger2Change) {
	ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
	if (loggerFactory instanceof LoggerContext) {
		LoggerContext context = (LoggerContext) loggerFactory;
		context.getLogger(logger2Change.getName()).setLevel(Level.valueOf(logger2Change.getLevel()));
	}
}
 

public static void setupLogger() {
	ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();

	if (loggerFactory instanceof LoggerContext) {
		LoggerContext lc = (LoggerContext) loggerFactory;

		if (U.isEmpty(lc.getCopyOfPropertyMap())) {
			Logger root = lc.getLogger(Logger.ROOT_LOGGER_NAME);
			root.setLevel(Level.INFO);
		}
	}
}
 

private static void stopLog() {
  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
  if (loggerFactory instanceof LoggerContext) {
    LoggerContext context = (LoggerContext) loggerFactory;
    context.stop();
  }
}
 

/**
 * Fixes the Chameleon logging configuration to write the logs in the logs/wisdom.log file instead of chameleon.log
 * file.
 *
 * @param basedir the base directory of the chameleon
 */
public static void fixLoggingSystem(File basedir) {
    ILoggerFactory factory = LoggerFactory.getILoggerFactory();
    if (factory instanceof LoggerContext) {
        // We know that we are using logback from here.
        LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
        ch.qos.logback.classic.Logger logbackLogger = lc.getLogger(Logger.ROOT_LOGGER_NAME);
        if (logbackLogger == null) {
            return;
        }

        Iterator<Appender<ILoggingEvent>> iterator = logbackLogger.iteratorForAppenders();
        while (iterator.hasNext()) {
            Appender<ILoggingEvent> appender = iterator.next();

            if (appender instanceof AsyncAppender) {
                appender = ((AsyncAppender) appender).getAppender("FILE");
            }

            if (appender instanceof RollingFileAppender) {
                RollingFileAppender<ILoggingEvent> fileAppender =
                        (RollingFileAppender<ILoggingEvent>) appender;
                String file = new File(basedir, "logs/wisdom.log").getAbsolutePath();
                fileAppender.stop();
                // Remove the created log directory.
                // We do that afterwards because on Windows the file cannot be deleted while we still have a logger
                // using it.
                FileUtils.deleteQuietly(new File("logs"));
                fileAppender.setFile(file);
                fileAppender.setContext(lc);
                fileAppender.start();
            }
        }
    }
}
 

private void flushLogs() {
  final long millisToWait = 100;

  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
  if (loggerFactory instanceof LoggerContext) {
    LoggerContext context = (LoggerContext) loggerFactory;
    context.stop();
  }

  try {
    Thread.sleep(millisToWait);
  } catch (Exception e) {
    LOG.info("While sleeping for log flush", e);
  }
}
 

@Test
public void shouldNotUseNopLoggerFactory() {
  ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();

  // verify that a SLF4J backend is used which is not the NOP logger
  assertFalse("Should not use NOPLoggerFactory", loggerFactory instanceof NOPLoggerFactory);

  // should either use slf4j-jdk14 or slf4j-jboss-logmanager
  String loggerFactoryClassName = loggerFactory.getClass().getCanonicalName();
  assertTrue("Should use slf4j-jdk14 or slf4j-jboss-logmanager",
      JDK14_LOGGER_FACTORY.equals(loggerFactoryClassName) || JBOSS_SLF4J_LOGGER_FACTORY.equals(loggerFactoryClassName));
}