reactor-core/src/main/java/reactor/util/Loggers.java
public static final void useConsoleLoggers() {
		String name = LoggerFactory.class.getName();
		LoggerFactory loggerFactory = new ConsoleLoggerFactory(false);
		loggerFactory.getLogger(name).debug("Using Console logging");
		LOGGER_FACTORY = loggerFactory;
	}
public static final void useConsoleLoggers() {
		String name = LoggerFactory.class.getName();
		LoggerFactory loggerFactory = new ConsoleLoggerFactory(false);
		loggerFactory.getLogger(name).debug("Using Console logging");
		LOGGER_FACTORY = loggerFactory;
	}
Force the usage of Console-based {@link Logger Loggers}, even if SLF4J is available
on the classpath. Console loggers will output {@link Logger#error(String) ERROR} and
{@link Logger#warn(String) WARN} levels to {@link System#err} and levels below to
{@link System#out}. All levels <strong>except TRACE and DEBUG</strong> are
considered enabled. TRACE and DEBUG are omitted.
<p>
The previously active logger factory is simply replaced without
any particular clean-up.