MavenLoggerFactory mavenLoggerFactory = new MavenLoggerFactory();
        mavenLoggerFactory.setLogLevelRecorder(new LogLevelRecorder("WARN"));
        assertThrows(
                IllegalStateException.class,
                () -> mavenLoggerFactory.setLogLevelRecorder(new LogLevelRecorder("ERROR")));
    }

public class MavenLoggerFactory extends SimpleLoggerFactory implements MavenSlf4jWrapperFactory {
    private LogLevelRecorder logLevelRecorder = null;

    public MavenLoggerFactory() {}

    @Override
    public void setLogLevelRecorder(LogLevelRecorder logLevelRecorder) {
        if (this.logLevelRecorder != null) {
            throw new IllegalStateException("LogLevelRecorder has already been set.");
        }

import org.slf4j.ILoggerFactory;

/**
 * Wrapper for creating loggers which can have a log level threshold.
 */
public interface MavenSlf4jWrapperFactory extends ILoggerFactory {
    void setLogLevelRecorder(LogLevelRecorder logLevelRecorder);

    Optional<LogLevelRecorder> getLogLevelRecorder();

                LogLevelRecorder logLevelRecorder = new LogLevelRecorder(logLevelThreshold);
                ((MavenSlf4jWrapperFactory) slf4jLoggerFactory).setLogLevelRecorder(logLevelRecorder);
                slf4jLogger.info("Enabled to break the build on log level {}.", logLevelThreshold);
            } else {
                slf4jLogger.warn(