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Lidalia SLF4J Extensions

An extension to SLF4J allowing logging at a level determined at run, rather than compile, time via a Level enum.

See the JavaDocs for full documentation and the Test Source for complete examples of usage.

Details on how to depend on this library in your favourite build tool can be found here.


The basic class is a decorator around an org.slf4j.Logger that also implements that class. As such it can operate as a direct drop-in replacement for the SLF4J API without breaking any existing code. The decorator adds a set of methods called log that take an instance of Level as the first argument and delegate to the appropriate method on the SLF4J Logger (info for INFO, etc.).


public class Example {

    private static final Logger logger = LoggerFactory.getLogger(Example.class);

    public static void main(String[] args) {
        Level level = Level.valueOf(args[0]);
        logger.log(level, "Logged at a level configured at runtime");