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JDBC Type 4 driver for MySQL
There is a newer version: 8.0.33
/*
  Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/J is licensed under the terms of the GPLv2
  , like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FOSS License Exception
  .

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA

 */

package com.mysql.cj.api.log;

/**
 * Unified interface to logging facilities on different platforms
 */
public interface Log {
    /** Logger instance name */
    static final String LOGGER_INSTANCE_NAME = "MySQL";

    /**
     * Is the 'debug' log level enabled?
     * 
     * @return true if so.
     */
    boolean isDebugEnabled();

    /**
     * Is the 'error' log level enabled?
     * 
     * @return true if so.
     */
    boolean isErrorEnabled();

    /**
     * Is the 'fatal' log level enabled?
     * 
     * @return true if so.
     */
    boolean isFatalEnabled();

    /**
     * Is the 'info' log level enabled?
     * 
     * @return true if so.
     */
    boolean isInfoEnabled();

    /**
     * Is the 'trace' log level enabled?
     * 
     * @return true if so.
     */
    boolean isTraceEnabled();

    /**
     * Is the 'warn' log level enabled?
     * 
     * @return true if so.
     */
    boolean isWarnEnabled();

    /**
     * Logs the given message instance using the 'debug' level
     * 
     * @param msg
     *            the message to log
     */
    void logDebug(Object msg);

    /**
     * Logs the given message and Throwable at the 'debug' level.
     * 
     * @param msg
     *            the message to log
     * @param thrown
     *            the throwable to log (may be null)
     */
    void logDebug(Object msg, Throwable thrown);

    /**
     * Logs the given message instance using the 'error' level
     * 
     * @param msg
     *            the message to log
     */
    void logError(Object msg);

    /**
     * Logs the given message and Throwable at the 'error' level.
     * 
     * @param msg
     *            the message to log
     * @param thrown
     *            the throwable to log (may be null)
     */
    void logError(Object msg, Throwable thrown);

    /**
     * Logs the given message instance using the 'fatal' level
     * 
     * @param msg
     *            the message to log
     */
    void logFatal(Object msg);

    /**
     * Logs the given message and Throwable at the 'fatal' level.
     * 
     * @param msg
     *            the message to log
     * @param thrown
     *            the throwable to log (may be null)
     */
    void logFatal(Object msg, Throwable thrown);

    /**
     * Logs the given message instance using the 'info' level
     * 
     * @param msg
     *            the message to log
     */
    void logInfo(Object msg);

    /**
     * Logs the given message and Throwable at the 'info' level.
     * 
     * @param msg
     *            the message to log
     * @param thrown
     *            the throwable to log (may be null)
     */
    void logInfo(Object msg, Throwable thrown);

    /**
     * Logs the given message instance using the 'trace' level
     * 
     * @param msg
     *            the message to log
     */
    void logTrace(Object msg);

    /**
     * Logs the given message and Throwable at the 'trace' level.
     * 
     * @param msg
     *            the message to log
     * @param thrown
     *            the throwable to log (may be null)
     */
    void logTrace(Object msg, Throwable thrown);

    /**
     * Logs the given message instance using the 'warn' level
     * 
     * @param msg
     *            the message to log
     */
    void logWarn(Object msg);

    /**
     * Logs the given message and Throwable at the 'warn' level.
     * 
     * @param msg
     *            the message to log
     * @param thrown
     *            the throwable to log (may be null)
     */
    void logWarn(Object msg, Throwable thrown);
}