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SLF4J

Last update: 2 Oct 2022

Examples

How to define a logger

private final static Logger logger = LoggerFactory.getLogger(<nome_classe>.class);
private final static XLogger logger = XLoggerFactory.getXLogger(<nome_classe>.class);

How to log to info and debug levels:

logger.info("Message without parameters");

// no need to create an Object array
logger.info("Messaggio with many parameters {} {} {}", arg1, arg2, agr3,...);

Note: avoid using the trace level. Prefer the debug level

How to log an exception

logger.error("message", exception)
logger.error("message with an argument {}", arg1, exception)

Avoid:

logger.error(e.getMessage(), exception);
logger.catching(exception);