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/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1997-2003 The Apache Software Foundation. All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the
 *    Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software
 *    itself, if and wherever such third-party acknowledgments
 *    normally appear.
 *
 * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
 *    must not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "Apache",
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 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation. For more
 * information on the Apache Software Foundation, please see
 * .
 */

package org.codehaus.plexus.logging;

/**
 * @author Jason van Zyl
 * @author Trygve Laugstøl
 * @version $Id: Logger.java 1323 2004-12-20 23:00:59Z jvanzyl $
 */
public interface Logger
{
    /** Typecode for debugging messages. */
    int LEVEL_DEBUG = 0;

    /** Typecode for informational messages. */
    int LEVEL_INFO = 1;

    /** Typecode for warning messages. */
    int LEVEL_WARN = 2;

    /** Typecode for error messages. */
    int LEVEL_ERROR = 3;

    /** Typecode for fatal error messages. */
    int LEVEL_FATAL = 4;

    /** Typecode for disabled log levels. */
    int LEVEL_DISABLED = 5;

    void debug( String message );

    void debug( String message, Throwable throwable );

    boolean isDebugEnabled();

    void info( String message );

    void info( String message, Throwable throwable );

    boolean isInfoEnabled();

    void warn( String message );

    void warn( String message, Throwable throwable );

    boolean isWarnEnabled();

    void error( String message );

    void error( String message, Throwable throwable );

    boolean isErrorEnabled();

    void fatalError( String message );

    void fatalError( String message, Throwable throwable );

    boolean isFatalErrorEnabled();

    /**
     * This one probably shouldn't be deprecated after all. One useful use case is when
     * you have a server that creates a lot of threads and would like to create a child
     * logger pr thread.
     */
    Logger getChildLogger( String name );

    int getThreshold();

    String getName();
}