Java Configuration.getRootLogger方法代碼示例

import org.apache.logging.log4j.core.config.Configuration; //導入方法依賴的package包/類
/**
 * Auxiliary method to change the log level.
 *
 * @param logLevel
 *  The log level to set.
 *
 * @return
 *  A ResponseContext containing the result of the command.
 */
public static ResponseContext changeLogLevel(String logLevel) {
    ResponseContext responseContext = new ResponseContext();
    responseContext.setContentType(ResponseContext.PLAIN_TEXT_CONTENT_TYPE);
    LoggerContext loggerContext = LoggerContext.getContext(false);
    Configuration configuration = loggerContext.getConfiguration();
    LoggerConfig rootLogger = configuration.getRootLogger();
    if (rootLogger != null) {
        switch (StandardLevel.getStandardLevel(Level.toLevel(logLevel, Level.INFO).intLevel())) {
            case ERROR:
                rootLogger.setLevel(Level.ERROR);
                responseContext.setResponse("Log level changed to ERROR");
                break;
            case WARN:
                rootLogger.setLevel(Level.WARN);
                responseContext.setResponse("Log level changed to WARN");
                break;
            case INFO:
                rootLogger.setLevel(Level.INFO);
                responseContext.setResponse("Log level changed to INFO");
                break;
            case DEBUG:
                rootLogger.setLevel(Level.DEBUG);
                responseContext.setResponse("Log level changed to DEBUG");
                break;
            case OFF:
                rootLogger.setLevel(Level.OFF);
                responseContext.setResponse("Logging switched off");
                break;
            default:
                responseContext.setResponse("Log level unchanged, unsupported level: " + logLevel);
        }
        loggerContext.updateLoggers();
    } else {
        responseContext.setResponse("Unable to change log level, no ROOT logger found...");
        responseContext.setErrorCode(String.valueOf(HttpURLConnection.HTTP_INTERNAL_ERROR));
    }
    return responseContext;
}
 

import org.apache.logging.log4j.core.config.Configuration; //導入方法依賴的package包/類
/**
 * Adds the specified appender to the root logger.
 * 
 * @param appender
 *            the appender
 * @param level
 *            the logging level to assign to the appender. Default is INFO
 */
public static synchronized void addRootApender(Appender appender, String level) {
	Configuration config = getConfiguration();
	appender.start();
	config.addAppender(appender);
	Level l = Level.toLevel(level, Level.INFO);

	LoggerConfig root = config.getRootLogger();
	if (!root.getLevel().isLessSpecificThan(l)) {
		if (originalRootLevel == null) {
			originalRootLevel = root.getLevel();
			Iterator<AppenderRef> it = root.getAppenderRefs().iterator();
			while (it.hasNext()) {
				AppenderRef ar = it.next();
				if (ar.getLevel() == null) {
					Appender a = root.getAppenders().get(ar.getRef());
					root.removeAppender(a.getName());
					root.addAppender(a, originalRootLevel, ar.getFilter());
				}
			}
		}
		root.setLevel(l);
	}
	root.addAppender(appender, l, null);
	addedAppenders++;
	getContext().updateLoggers();
}
 

import org.apache.logging.log4j.core.config.Configuration; //導入方法依賴的package包/類
/**
 * Removes the specified previously added appender from the root logger.
 * 
 * @param appender
 *            the appender to remove
 */
public static synchronized void removeRootApender(Appender appender) {
	if (addedAppenders > 0) {
		Configuration config = getConfiguration();
		String name = appender.getName();
		LoggerConfig root = config.getRootLogger();
		root.removeAppender(name);
		appender.stop();
		if (--addedAppenders == 0 && originalRootLevel != null) {
			root.setLevel(originalRootLevel);
		}
		getContext().updateLoggers();
	}
}
 

import org.apache.logging.log4j.core.config.Configuration; //導入方法依賴的package包/類
/**
 * Auxiliary method to find the root logger.
 *
 * @return
 *  A reference of the root logger.
 */
private LoggerConfig getRootLogger() {
    LoggerContext loggerContext = LoggerContext.getContext(false);
    Configuration configuration = loggerContext.getConfiguration();
    return configuration.getRootLogger();
}