SelectionRule.java example

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/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package chapters.architecture;

import ch.qos.logback.classic.Level;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Ceki Gülcü
 */
public class SelectionRule {

    public static void main(String[] args) {
        // get a logger instance named "com.foo". Let us further assume that the
        // logger is of type ch.qos.logback.classic.Logger so that we can
        // set its level
        ch.qos.logback.classic.Logger logger = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger("com.foo");
        // set its Level to INFO. The setLevel() method requires a logback logger
        logger.setLevel(Level.INFO);

        Logger barlogger = LoggerFactory.getLogger("com.foo.Bar");

        // This request is enabled, because WARN >= INFO
        logger.warn("Low fuel level.");

        // This request is disabled, because DEBUG < INFO.
        logger.debug("Starting search for nearest gas station.");

        // The logger instance barlogger, named "com.foo.Bar",
        // will inherit its level from the logger named
        // "com.foo" Thus, the following request is enabled
        // because INFO >= INFO.
        barlogger.info("Located nearest gas station.");

        // This request is disabled, because DEBUG < INFO.
        barlogger.debug("Exiting gas station search");

    }
}