Package com.oracle.truffle.api

Class TruffleLogger

java.lang.Object
com.oracle.truffle.api.TruffleLogger
public final class TruffleLogger extends Object
Support for logging in Truffle languages and instruments.

The logger's Level configuration is done using the Context's options. The level option key has the following format: log.languageId.className.level or log.instrumentId.className.level. The value is either the name of pre-defined Level constant or a numeric Level value. If not explicitly set in Context's options the level is inherited from the parent logger.

The TruffleLogger supports message parameters of primitive types and strings. The object parameters are converted into string value before they are passed to the Handler.

The TruffleLogger instances are safe to be used on compiled code paths as well as from multiple-threads.

Since:
19.0

  • Method Details

    • getLogger

      public static TruffleLogger getLogger(String id)
      Find or create a root logger for a given language or instrument. If the root logger for given language or instrument already exists it's returned, otherwise a new root logger is created.
      Parameters:
      id - the unique id of language or instrument
      Returns:
      a TruffleLogger
      Throws:
      NullPointerException - if id is null
      IllegalArgumentException - if id is not a valid language or instrument id.
      Since:
      19.0

    • getLogger

      public static TruffleLogger getLogger(String id, Class<?> forClass)
      Find or create a logger for a given language or instrument class. If a logger for the class already exists it's returned, otherwise a new logger is created.
      Parameters:
      id - the unique id of language or instrument
      forClass - the Class to create a logger for
      Returns:
      a TruffleLogger
      Throws:
      NullPointerException - if id or forClass is null
      IllegalArgumentException - if id is not a valid language or instrument id.
      Since:
      19.0

    • getLogger

      public static TruffleLogger getLogger(String id, String loggerName)
      Find or create a logger for a given language or instrument. If a logger with given name already exists it's returned, otherwise a new logger is created.
      Parameters:
      id - the unique id of language or instrument
      loggerName - the the name of a TruffleLogger, if a loggerName is null or empty a root logger for language or instrument is returned
      Returns:
      a TruffleLogger
      Throws:
      NullPointerException - if id is null
      IllegalArgumentException - if id is not a valid language or instrument id.
      Since:
      19.0

    • config

      public void config(String message)
      Logs a message with config level.

      If the logger is enabled for the config level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • config

      public void config(Supplier<String> messageSupplier)
      Logs a message with config level. The message is constructed only when the logger is enabled for the config level.

      If the logger is enabled for the config level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • entering

      public void entering(String sourceClass, String sourceMethod)
      Logs entry into method.

      This method can be used to log entry into a method. A LogRecord with message "ENTRY" and the given sourceMethod and sourceClass is logged with finer level.

      Parameters:
      sourceClass - the entered class
      sourceMethod - the entered method
      Since:
      19.0

    • entering

      public void entering(String sourceClass, String sourceMethod, Object parameter)
      Logs entry into method with single parameter.

      This method can be used to log entry into a method. A LogRecord with message "ENTRY", the given sourceMethod and sourceClass and given parameter is logged with finer level.

      Parameters:
      sourceClass - the entered class
      sourceMethod - the entered method
      parameter - the method parameter
      Since:
      19.0

    • entering

      public void entering(String sourceClass, String sourceMethod, Object[] parameters)
      Logs entry into method with multiple parameters.

      This method can be used to log entry into a method. A LogRecord with message "ENTRY", the given sourceMethod and sourceClass and given parameters is logged with finer level.

      Parameters:
      sourceClass - the entered class
      sourceMethod - the entered method
      parameters - the method parameters
      Since:
      19.0

    • exiting

      public void exiting(String sourceClass, String sourceMethod)
      Logs a return from method.

      This method can be used to log return from a method. A LogRecord with message "RETURN" and the given sourceMethod and sourceClass is logged with finer level.

      Parameters:
      sourceClass - the exiting class
      sourceMethod - the exiting method
      Since:
      19.0

    • exiting

      public void exiting(String sourceClass, String sourceMethod, Object result)
      Logs a return from method with result.

      This method can be used to log return from a method. A LogRecord with message "RETURN", the given sourceMethod and sourceClass and method result is logged with finer level.

      Parameters:
      sourceClass - the exiting class
      sourceMethod - the exiting method
      result - the return value
      Since:
      19.0

    • fine

      public void fine(String message)
      Logs a message with fine level.

      If the logger is enabled for the fine level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • fine

      public void fine(Supplier<String> messageSupplier)
      Logs a message with fine level. The message is constructed only when the logger is enabled for the fine level.

      If the logger is enabled for the fine level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • finer

      public void finer(String message)
      Logs a message with finer level.

      If the logger is enabled for the finer level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • finer

      public void finer(Supplier<String> messageSupplier)
      Logs a message with finer level. The message is constructed only when the logger is enabled for the finer level.

      If the logger is enabled for the finer level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • finest

      public void finest(String message)
      Logs a message with finest level.

      If the logger is enabled for the finest level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • finest

      public void finest(Supplier<String> messageSupplier)
      Logs a message with finest level. The message is constructed only when the logger is enabled for the finest level.

      If the logger is enabled for the finest level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • info

      public void info(String message)
      Logs a message with info level.

      If the logger is enabled for the info level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • info

      public void info(Supplier<String> messageSupplier)
      Logs a message with info level. The message is constructed only when the logger is enabled for the info level.

      If the logger is enabled for the info level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • severe

      public void severe(String message)
      Logs a message with severe level.

      If the logger is enabled for the severe level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • severe

      public void severe(Supplier<String> messageSupplier)
      Logs a message with severe level. The message is constructed only when the logger is enabled for the severe level.

      If the logger is enabled for the severe level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • throwing

      public <T extends Throwable> T throwing(String sourceClass, String sourceMethod, T thrown)
      Logs throwing an exception.

      This method can be used to log exception thrown from a method. A LogRecord with message "THROW",the given sourceMethod and sourceClass and thrown is logged with finer level.

      Parameters:
      sourceClass - the class throwing an exception
      sourceMethod - the method throwing an exception
      thrown - the thrown exception
      Since:
      19.0

    • warning

      public void warning(String message)
      Logs a message with warning level.

      If the logger is enabled for the warning level the message is sent to the Handler registered in the current Context.

      Parameters:
      message - the message to log
      Since:
      19.0

    • warning

      public void warning(Supplier<String> messageSupplier)
      Logs a message with warning level. The message is constructed only when the logger is enabled for the warning level.

      If the logger is enabled for the warning level the message is sent to the Handler registered in the current Context.

      Parameters:
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • log

      public void log(Level level, String message)
      Logs a message.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      message - the message to log
      Since:
      19.0

    • log

      public void log(Level level, Supplier<String> messageSupplier)
      Logs a message. The message is constructed only when the logger is enabled for the given level.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • log

      public void log(Level level, String message, Object parameter)
      Logs a message with single parameter.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      message - the message to log
      parameter - the log message parameter
      Since:
      19.0

    • log

      public void log(Level level, String message, Object[] parameters)
      Logs a message with multiple parameters.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      message - the message to log
      parameters - the log message parameters
      Since:
      19.0

    • log

      public void log(Level level, String message, Throwable thrown)
      Logs a message with an exception.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      message - the message to log
      thrown - the exception to log
      Since:
      19.0

    • log

      public void log(Level level, Throwable thrown, Supplier<String> messageSupplier)
      Logs a message with an exception. The message is constructed only when the logger is enabled for the given level.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      thrown - the exception to log
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • logp

      public void logp(Level level, String sourceClass, String sourceMethod, String message)
      Logs a message, specifying source class and source method.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      sourceClass - the class issued the logging request
      sourceMethod - the method issued the logging request
      message - the message to log
      Since:
      19.0

    • logp

      public void logp(Level level, String sourceClass, String sourceMethod, Supplier<String> messageSupplier)
      Logs a message, specifying source class and source method. The message is constructed only when the logger is enabled for the given level.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      sourceClass - the class issued the logging request
      sourceMethod - the method issued the logging request
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • logp

      public void logp(Level level, String sourceClass, String sourceMethod, String message, Object parameter)
      Logs a message with single parameter, specifying source class and source method.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      sourceClass - the class issued the logging request
      sourceMethod - the method issued the logging request
      message - the message to log
      parameter - the log message parameter
      Since:
      19.0

    • logp

      public void logp(Level level, String sourceClass, String sourceMethod, String message, Object[] parameters)
      Log a message with multiple parameters, specifying source class and source method.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      sourceClass - the class issued the logging request
      sourceMethod - the method issued the logging request
      message - the message to log
      parameters - the log message parameters
      Since:
      19.0

    • logp

      public void logp(Level level, String sourceClass, String sourceMethod, String message, Throwable thrown)
      Logs a message with an exception, specifying source class and source method.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      sourceClass - the class issued the logging request
      sourceMethod - the method issued the logging request
      message - the message to log
      thrown - the exception to log
      Since:
      19.0

    • logp

      public void logp(Level level, String sourceClass, String sourceMethod, Throwable thrown, Supplier<String> messageSupplier)
      Logs a message with an exception, specifying source class and source method. The message is constructed only when the logger is enabled for the given level.

      If the logger is enabled for the given level the message is sent to the Handler registered in the current Context.

      Parameters:
      level - the required Level
      sourceClass - the class issued the logging request
      sourceMethod - the method issued the logging request
      thrown - the exception to log
      messageSupplier - the Supplier called to produce the message to log
      Since:
      19.0

    • getName

      public String getName()
      Returns the name of the logger.
      Returns:
      the logger name
      Since:
      19.0

    • getParent

      public TruffleLogger getParent()
      Returns the parent TruffleLogger.
      Returns:
      the parent TruffleLogger or null when the TruffleLogger has no parent.
      Since:
      19.0

    • isLoggable

      public boolean isLoggable(Level level)
      Checks if a message of the given level would be logged by this logger.
      Parameters:
      level - the required logging level
      Returns:
      true if message is loggable by this logger
      Since:
      19.0