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Turbine is a servlet based framework that allows experienced Java developers to quickly build secure web applications. Parts of Turbine can also be used independently of the web portion of Turbine as well. In other words, we strive to make portions of Turbine easily available for use in other applications.
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package org.apache.turbine.services.avaloncomponent;

import org.apache.avalon.framework.logger.Logger;
import org.apache.logging.log4j.LogManager;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * A Log4J2 wrapper class for Logger.
 *
 * @author Thomas Vandahl
 */
public final class Log4j2Logger
        implements Logger
{
    // underlying implementation
    private final org.apache.logging.log4j.Logger m_logger;

    /**
     * Create a logger that delegates to specified category.
     *
     * @param logImpl
     *            the category to delegate to
     */
    public Log4j2Logger(final org.apache.logging.log4j.Logger logImpl)
    {
        m_logger = logImpl;
    }

    /**
     * Log a debug message.
     *
     * @param message
     *            the message
     */
    @Override
    public void debug(final String message)
    {
        m_logger.debug(message);
    }

    /**
     * Log a debug message.
     *
     * @param message
     *            the message
     * @param throwable
     *            the throwable
     */
    @Override
    public void debug(final String message, final Throwable throwable)
    {
        m_logger.debug(message, throwable);
    }

    /**
     * Determine if messages of priority "debug" will be logged.
     *
     * @return true if "debug" messages will be logged
     */
    @Override
    public boolean isDebugEnabled()
    {
        return m_logger.isDebugEnabled();
    }

    /**
     * Log a info message.
     *
     * @param message
     *            the message
     */
    @Override
    public void info(final String message)
    {
        m_logger.info(message);
    }

    /**
     * Log a info message.
     *
     * @param message
     *            the message
     * @param throwable
     *            the throwable
     */
    @Override
    public void info(final String message, final Throwable throwable)
    {
        m_logger.info(message, throwable);
    }

    /**
     * Determine if messages of priority "info" will be logged.
     *
     * @return true if "info" messages will be logged
     */
    @Override
    public boolean isInfoEnabled()
    {
        return m_logger.isInfoEnabled();
    }

    /**
     * Log a warn message.
     *
     * @param message
     *            the message
     */
    @Override
    public void warn(final String message)
    {
        m_logger.warn(message);
    }

    /**
     * Log a warn message.
     *
     * @param message
     *            the message
     * @param throwable
     *            the throwable
     */
    @Override
    public void warn(final String message, final Throwable throwable)
    {
        m_logger.warn(message, throwable);
    }

    /**
     * Determine if messages of priority "warn" will be logged.
     *
     * @return true if "warn" messages will be logged
     */
    @Override
    public boolean isWarnEnabled()
    {
        return m_logger.isWarnEnabled();
    }

    /**
     * Log a error message.
     *
     * @param message
     *            the message
     */
    @Override
    public void error(final String message)
    {
        m_logger.error(message);
    }

    /**
     * Log a error message.
     *
     * @param message
     *            the message
     * @param throwable
     *            the throwable
     */
    @Override
    public void error(final String message, final Throwable throwable)
    {
        m_logger.error(message, throwable);
    }

    /**
     * Determine if messages of priority "error" will be logged.
     *
     * @return true if "error" messages will be logged
     */
    @Override
    public boolean isErrorEnabled()
    {
        return m_logger.isErrorEnabled();
    }

    /**
     * Log a fatalError message.
     *
     * @param message
     *            the message
     */
    @Override
    public void fatalError(final String message)
    {
        m_logger.fatal(message);
    }

    /**
     * Log a fatalError message.
     *
     * @param message
     *            the message
     * @param throwable
     *            the throwable
     */
    @Override
    public void fatalError(final String message, final Throwable throwable)
    {
        m_logger.fatal(message, throwable);
    }

    /**
     * Determine if messages of priority "fatalError" will be logged.
     *
     * @return true if "fatalError" messages will be logged
     */
    @Override
    public boolean isFatalErrorEnabled()
    {
        return m_logger.isFatalEnabled();
    }

    /**
     * Create a new child logger. The name of the child logger is
     * [current-loggers-name].[passed-in-name] Throws
     * IllegalArgumentException if name has an empty element name
     *
     * @param name
     *            the subname of this logger
     * @return the new logger
     */
    @Override
    public Logger getChildLogger(final String name)
    {
        return new Log4j2Logger(LogManager.getLogger(m_logger.getName() + "." + name));
    }
}