Examples of javolution.context.LogContext

javolution.context.LogContext
orarily disables logging. try { ClassInitializer.initializeAll(); // Initializes bootstrap, extensions and classpath classes. } finally { LogContext.exit(LogContext.NULL); // Goes back to default logging. } ... }[/code]

Applications may extend this base class to address specific logging requirements. For example:[code] // This class allows for custom logging of session events. public abstract class SessionLog extends LogContext { public static void start(Session session) { LogContext log = LogContext.current(); if (log instanceof SessionLog.Loggable) { ((SessionLog.Loggable)log).logStart(session); } else if (log.infoLogged()){ log.logInfo("Session " + session.id() + " started"); } } public static void end(Session session) { ... } public interface Loggable { void logStart(Session session); void logEnd(Session session); } }[/code]

The use of interfaces (such as Loggable above) makes it easy for any context to support customs logging events. For example:[code] class MyLog extends StandardLog implements SessionLog.Loggable, DatabaseLog.Loggable { ... // Specialized logging for session and database events. } MyLog myLog = new MyLog(); LogContext.enter(myLog); try { ... LogContext.info("Informative message"); // Standard logging. ... DatabaseLog.fail(transaction); // Database custom logging. ... SessionLog.start(session); // Session custom logging. ... } finally { LogContext.exit(myLog); }[/code]
@author Jean-Marie Dautelle @version 5.3, March 5, 2009

     * @param level the message logging level
     * @return <code>true</code> if a message of specified level would actually
     *        be logged;<code>false</code> otherwise.
     */
    public static boolean isLoggable(Level level) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            return ((StandardLog) log)._logger.isLoggable(level);
        } else if (level.intValue() >= Level.SEVERE.intValue()) {
            return LogContext.isErrorLogged();
        } else if (level.intValue() >= Level.WARNING.intValue()) {

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     * or {@link LogContext#debug debug} message is possibly logged.
     *
     * @param record the LogRecord to be published.
     */
    public static void log(LogRecord record) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.log(record);
        } else {
            Throwable error = record.getThrown();
            if (error != null) {

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     * error} message is logged.
     * 
     * @param msg the severe message.
     */
    public static void severe(String msg) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.severe(msg);
        } else {
            LogContext.warning(msg);
        }

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     * context is not a {@link StandardLog} no message is logged.
     * 
     * @param msg the config message.
     */
    public static void config(String msg) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.config(msg);
        }
    }

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     * context is not a {@link StandardLog} no message is logged.
     * 
     * @param msg the fine message.
     */
    public static void fine(String msg) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.fine(msg);
        }
    }

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     * context is not a {@link StandardLog} no message is logged.
     * 
     * @param msg the finer message.
     */
    public static void finer(String msg) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.finer(msg);
        }
    }

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     * context is not a {@link StandardLog} no message is logged.
     * 
     * @param msg the finest message.
     */
    public static void finest(String msg) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.finest(msg);
        }
    }

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     * @param sourceMethod name of the method.
     * @param thrown the error that is being thrown.
     */
    public static void throwing(String sourceClass, String sourceMethod,
            Throwable thrown) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.throwing(sourceClass, sourceMethod,
                    thrown);
        } else {
            LogContext.error(thrown, "Thrown by " + sourceClass + "." + sourceMethod);

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     * 
     * @param sourceClass name of class that issued the logging request.
     * @param sourceMethod name of method that is being entered.
     */
    public static void entering(String sourceClass, String sourceMethod) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.entering(sourceClass, sourceMethod);
        } else {
             LogContext.debug("Entering " + sourceClass + "." + sourceMethod);
        }

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     * 
     * @param sourceClass name of class that issued the logging request.
     * @param sourceMethod name of method that is being returned.
     */
    public static void exiting(String sourceClass, String sourceMethod) {
        LogContext log = (LogContext) LogContext.getCurrentLogContext();
        if (log instanceof StandardLog) {
            ((StandardLog) log)._logger.exiting(sourceClass, sourceMethod);
        } else {
             LogContext.debug("Exiting " + sourceClass + "." + sourceMethod);
        }

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javolution.text.TextBuilder

javolution.util.StandardLog

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