runtime/logging/DebugLogger.java

49  * Wrapper class for Logging system. This is how you are supposed to register a logger and use it
54     /** Disabled logger used for all loggers that need an instance, but shouldn't output anything */
57     private final Logger  logger;
64     /** A quiet logger only logs {@link RuntimeEvent}s and does't output any text, regardless of level */
70      * A logger can be paired with a property, e.g. {@code --log:codegen:info} is equivalent to {@code -Dnashorn.codegen.log}
72      * @param loggerName  name of logger - this is the unique key with which it can be identified
73      * @param loggerLevel level of the logger
74      * @param isQuiet     is this a quiet logger, i.e. enabled for things like e.g. RuntimeEvent:s, but quiet otherwise
77         this.logger  = instantiateLogger(loggerName, loggerLevel);
79         assert logger != null;
84         final Logger logger = java.util.logging.Logger.getLogger(name);
88                 for (final Handler h : logger.getHandlers()) {
89                     logger.removeHandler(h);
92                 logger.setLevel(level);
93                 logger.setUseParentHandlers(false);
110                 logger.addHandler(c);
116         return logger;
120      * Do not currently support chaining this with parent logger. Logger level null
125         return logger.getLevel() == null ? Level.OFF : logger.getLevel();
129      * Get the output writer for the logger. Loggers always default to
173      * Check if the logger is enabled
181      * Check if the logger is enabled
182      * @param logger logger to check, null will return false
185     public static boolean isEnabled(final DebugLogger logger) {
186         return logger != null && logger.isEnabled();
190      * If you want to change the indent level of your logger, call indent with a new position.
237         return logger.isLoggable(level);
241      * Shorthand for outputting a log string as log level {@link java.util.logging.Level#FINEST} on this logger
249      * Shorthand for outputting a log string as log level {@link java.util.logging.Level#FINEST} on this logger
260      * {@link java.util.logging.Level#FINEST} on this logger
269      * {@link java.util.logging.Level#FINEST} on this logger
280      * {@link java.util.logging.Level#FINER} on this logger
289      * {@link java.util.logging.Level#FINER} on this logger
300      * {@link java.util.logging.Level#FINER} on this logger
309      * {@link java.util.logging.Level#FINER} on this logger
320      * {@link java.util.logging.Level#FINE} on this logger
329      * {@link java.util.logging.Level#FINE} on this logger
340      * {@link java.util.logging.Level#FINE} on this logger
349      * {@link java.util.logging.Level#FINE} on this logger
360      * {@link java.util.logging.Level#CONFIG} on this logger
369      * {@link java.util.logging.Level#CONFIG} on this logger
380      * {@link java.util.logging.Level#CONFIG} on this logger
389      * {@link java.util.logging.Level#CONFIG} on this logger
400      * {@link java.util.logging.Level#INFO} on this logger
409      * {@link java.util.logging.Level#INFO} on this logger
420      * {@link java.util.logging.Level#FINE} on this logger
429      * {@link java.util.logging.Level#FINE} on this logger
440      * {@link java.util.logging.Level#WARNING} on this logger
449      * {@link java.util.logging.Level#WARNING} on this logger
460      * {@link java.util.logging.Level#FINE} on this logger
469      * {@link java.util.logging.Level#FINE} on this logger
480      * {@link java.util.logging.Level#SEVERE} on this logger
489      * {@link java.util.logging.Level#SEVERE} on this logger
500      * {@link java.util.logging.Level#SEVERE} on this logger
509      * {@link java.util.logging.Level#FINE} on this logger
519      * Output log line on this logger at a given level of verbosity
526         if (isEnabled && !isQuiet && logger.isLoggable(level)) {
532             logger.log(level, sb.toString());
537      * Output log line on this logger at a given level of verbosity
544         if (isEnabled && !isQuiet && logger.isLoggable(level)) {
554      * Access control context for logger level and instantiation permissions