SLF4J

Recipes related to Simple Logging Facade for Java (SLF4J).

Composite Recipes

Recipes that include further recipes, often including the individual recipes below.

• Migrate Apache Commons Logging 1.x to SLF4J 1.x

• Migrate JUL to SLF4J

• Migrate Log4j 1.x to SLF4J 1.x

• Migrate Log4j 2.x to SLF4J 1.x

• Migrate Log4j to SLF4J

• Parameterize SLF4J's logging statements

• Replace JUL Logger creation with SLF4J LoggerFactory

• Replace JUL active Level check with corresponding SLF4J method calls

• Replace JUL active Level check with corresponding SLF4J method calls

• Replace JUL log(Level, String, Throwable) with corresponding SLF4J method calls

• Replace JUL log(Level, Throwable, Supplier<String>) with corresponding SLF4J method calls

• SLF4J best practices

Recipes

• Change SLF4J log level

• Enhances logging of exceptions by including the full stack trace in addition to the exception message

• Loggers should be named for their enclosing classes

• Replace JUL Level.ALL logging with SLF4J's trace level

• Replace JUL Logger.config(Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.fine(Supplier<String>) with SLF4J's Logger.atDebug().log(Supplier<String>)

• Replace JUL Logger.finer(Supplier<String>) with SLF4J's Logger.atTrace().log(Supplier<String>)

• Replace JUL Logger.finest(Supplier<String>) with SLF4J's Logger.atTrace().log(Supplier<String>)

• Replace JUL Logger.getLogger(Some.class.getCanonicalName()) with SLF4J's LoggerFactory.getLogger(Some.class)

• Replace JUL Logger.getLogger(Some.class.getName()) with SLF4J's LoggerFactory.getLogger(Some.class)

• Replace JUL Logger.info(Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.isLoggable(Level.ALL) with SLF4J's Logger.isTraceEnabled

• Replace JUL Logger.isLoggable(Level.CONFIG) with SLF4J's Logger.isInfoEnabled()

• Replace JUL Logger.isLoggable(Level.FINE) with SLF4J's Logger.isDebugEnabled()

• Replace JUL Logger.isLoggable(Level.FINER) with SLF4J's Logger.isTraceEnabled()

• Replace JUL Logger.isLoggable(Level.FINEST) with SLF4J's Logger.isTraceEnabled

• Replace JUL Logger.isLoggable(Level.INFO) with SLF4J's Logger.isInfoEnabled()

• Replace JUL Logger.isLoggable(Level.SEVERE) with SLF4J's Logger.isErrorEnabled()

• Replace JUL Logger.isLoggable(Level.WARNING) with SLF4J's Logger.isWarnEnabled()

• Replace JUL Logger.log(Level.ALL, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.CONFIG, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.FINE, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.FINER, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.FINEST, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.INFO, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.SEVERE, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.log(Level.WARNING, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL Logger.severe(Supplier<String>) with SLF4J's Logger.atError().log(Supplier<String>)

• Replace JUL Logger.warning(Supplier<String>) with SLF4J's Logger.atWarn().log(Supplier<String>)

• Replace JUL logger.log(Level.ALL, String message, Throwable e) with SLF4J's Logger.trace(message, e)

• Replace JUL logger.log(Level.ALL, e, Supplier<String>) with SLF4J's Logger.atTrace().log(Supplier<String>)

• Replace JUL logger.log(Level.CONFIG, String message, Throwable e) with SLF4J's Logger.info(message, e)

• Replace JUL logger.log(Level.CONFIG, e, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL logger.log(Level.FINE, String message, Throwable e) with SLF4J's Logger.debug(message, e)

• Replace JUL logger.log(Level.FINE, e, Supplier<String>) with SLF4J's Logger.atDebug().log(Supplier<String>)

• Replace JUL logger.log(Level.FINER, String message, Throwable e) with SLF4J's Logger.trace(message, e)

• Replace JUL logger.log(Level.FINER, e, Supplier<String>) with SLF4J's Logger.atTrace().log(Supplier<String>)

• Replace JUL logger.log(Level.FINEST, String message, Throwable e) with SLF4J's Logger.trace(message, e)

• Replace JUL logger.log(Level.FINEST, e, Supplier<String>) with SLF4J's Logger.atTrace().log(Supplier<String>)

• Replace JUL logger.log(Level.INFO, String message, Throwable e) with SLF4J's Logger.info(message, e)

• Replace JUL logger.log(Level.INFO, e, Supplier<String>) with SLF4J's Logger.atInfo().log(Supplier<String>)

• Replace JUL logger.log(Level.SEVERE, String message, Throwable e) with SLF4J's Logger.error(message, e)

• Replace JUL logger.log(Level.SEVERE, e, Supplier<String>) with SLF4J's Logger.atError().log(Supplier<String>)

• Replace JUL logger.log(Level.WARNING, String message, Throwable e) with SLF4J's Logger.warn(message, e)

• Replace JUL logger.log(Level.WARNING, e, Supplier<String>) with SLF4J's Logger.atWarn().log(Supplier<String>)

• Replace parameterized JUL level call with corresponding SLF4J method calls

• SLF4J logging statements should begin with constants